diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.gitignore b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.gitignore
new file mode 100644
index 0000000..549e00a
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.gitignore
@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.mvn/wrapper/maven-wrapper.jar b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.mvn/wrapper/maven-wrapper.jar
new file mode 100644
index 0000000..cb28b0e
Binary files /dev/null and b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.mvn/wrapper/maven-wrapper.jar differ
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.mvn/wrapper/maven-wrapper.properties b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.mvn/wrapper/maven-wrapper.properties
new file mode 100644
index 0000000..2e76e18
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.4/apache-maven-3.9.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/mvnw b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/mvnw
new file mode 100644
index 0000000..66df285
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/mvnw
@@ -0,0 +1,308 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.2.0
+#
+# Required ENV vars:
+# ------------------
+# JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+# MAVEN_OPTS - parameters passed to the Java VM when running Maven
+# e.g. to debug Maven itself, use
+# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+# MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+ if [ -f /usr/local/etc/mavenrc ] ; then
+ . /usr/local/etc/mavenrc
+ fi
+
+ if [ -f /etc/mavenrc ] ; then
+ . /etc/mavenrc
+ fi
+
+ if [ -f "$HOME/.mavenrc" ] ; then
+ . "$HOME/.mavenrc"
+ fi
+
+fi
+
+# OS specific support. $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "$(uname)" in
+ CYGWIN*) cygwin=true ;;
+ MINGW*) mingw=true;;
+ Darwin*) darwin=true
+ # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+ # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+ if [ -z "$JAVA_HOME" ]; then
+ if [ -x "/usr/libexec/java_home" ]; then
+ JAVA_HOME="$(/usr/libexec/java_home)"; export JAVA_HOME
+ else
+ JAVA_HOME="/Library/Java/Home"; export JAVA_HOME
+ fi
+ fi
+ ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+ if [ -r /etc/gentoo-release ] ; then
+ JAVA_HOME=$(java-config --jre-home)
+ fi
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+ [ -n "$JAVA_HOME" ] &&
+ JAVA_HOME=$(cygpath --unix "$JAVA_HOME")
+ [ -n "$CLASSPATH" ] &&
+ CLASSPATH=$(cygpath --path --unix "$CLASSPATH")
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+ [ -n "$JAVA_HOME" ] && [ -d "$JAVA_HOME" ] &&
+ JAVA_HOME="$(cd "$JAVA_HOME" || (echo "cannot cd into $JAVA_HOME."; exit 1); pwd)"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+ javaExecutable="$(which javac)"
+ if [ -n "$javaExecutable" ] && ! [ "$(expr "\"$javaExecutable\"" : '\([^ ]*\)')" = "no" ]; then
+ # readlink(1) is not available as standard on Solaris 10.
+ readLink=$(which readlink)
+ if [ ! "$(expr "$readLink" : '\([^ ]*\)')" = "no" ]; then
+ if $darwin ; then
+ javaHome="$(dirname "\"$javaExecutable\"")"
+ javaExecutable="$(cd "\"$javaHome\"" && pwd -P)/javac"
+ else
+ javaExecutable="$(readlink -f "\"$javaExecutable\"")"
+ fi
+ javaHome="$(dirname "\"$javaExecutable\"")"
+ javaHome=$(expr "$javaHome" : '\(.*\)/bin')
+ JAVA_HOME="$javaHome"
+ export JAVA_HOME
+ fi
+ fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+ if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD="$JAVA_HOME/jre/sh/java"
+ else
+ JAVACMD="$JAVA_HOME/bin/java"
+ fi
+ else
+ JAVACMD="$(\unset -f command 2>/dev/null; \command -v java)"
+ fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+ echo "Error: JAVA_HOME is not defined correctly." >&2
+ echo " We cannot execute $JAVACMD" >&2
+ exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+ echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+ if [ -z "$1" ]
+ then
+ echo "Path not specified to find_maven_basedir"
+ return 1
+ fi
+
+ basedir="$1"
+ wdir="$1"
+ while [ "$wdir" != '/' ] ; do
+ if [ -d "$wdir"/.mvn ] ; then
+ basedir=$wdir
+ break
+ fi
+ # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+ if [ -d "${wdir}" ]; then
+ wdir=$(cd "$wdir/.." || exit 1; pwd)
+ fi
+ # end of workaround
+ done
+ printf '%s' "$(cd "$basedir" || exit 1; pwd)"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+ if [ -f "$1" ]; then
+ # Remove \r in case we run on Windows within Git Bash
+ # and check out the repository with auto CRLF management
+ # enabled. Otherwise, we may read lines that are delimited with
+ # \r\n and produce $'-Xarg\r' rather than -Xarg due to word
+ # splitting rules.
+ tr -s '\r\n' ' ' < "$1"
+ fi
+}
+
+log() {
+ if [ "$MVNW_VERBOSE" = true ]; then
+ printf '%s\n' "$1"
+ fi
+}
+
+BASE_DIR=$(find_maven_basedir "$(dirname "$0")")
+if [ -z "$BASE_DIR" ]; then
+ exit 1;
+fi
+
+MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}; export MAVEN_PROJECTBASEDIR
+log "$MAVEN_PROJECTBASEDIR"
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+wrapperJarPath="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar"
+if [ -r "$wrapperJarPath" ]; then
+ log "Found $wrapperJarPath"
+else
+ log "Couldn't find $wrapperJarPath, downloading it ..."
+
+ if [ -n "$MVNW_REPOURL" ]; then
+ wrapperUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+ else
+ wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+ fi
+ while IFS="=" read -r key value; do
+ # Remove '\r' from value to allow usage on windows as IFS does not consider '\r' as a separator ( considers space, tab, new line ('\n'), and custom '=' )
+ safeValue=$(echo "$value" | tr -d '\r')
+ case "$key" in (wrapperUrl) wrapperUrl="$safeValue"; break ;;
+ esac
+ done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+ log "Downloading from: $wrapperUrl"
+
+ if $cygwin; then
+ wrapperJarPath=$(cygpath --path --windows "$wrapperJarPath")
+ fi
+
+ if command -v wget > /dev/null; then
+ log "Found wget ... using wget"
+ [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--quiet"
+ if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+ wget $QUIET "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+ else
+ wget $QUIET --http-user="$MVNW_USERNAME" --http-password="$MVNW_PASSWORD" "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+ fi
+ elif command -v curl > /dev/null; then
+ log "Found curl ... using curl"
+ [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--silent"
+ if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+ curl $QUIET -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+ else
+ curl $QUIET --user "$MVNW_USERNAME:$MVNW_PASSWORD" -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+ fi
+ else
+ log "Falling back to using Java to download"
+ javaSource="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.java"
+ javaClass="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.class"
+ # For Cygwin, switch paths to Windows format before running javac
+ if $cygwin; then
+ javaSource=$(cygpath --path --windows "$javaSource")
+ javaClass=$(cygpath --path --windows "$javaClass")
+ fi
+ if [ -e "$javaSource" ]; then
+ if [ ! -e "$javaClass" ]; then
+ log " - Compiling MavenWrapperDownloader.java ..."
+ ("$JAVA_HOME/bin/javac" "$javaSource")
+ fi
+ if [ -e "$javaClass" ]; then
+ log " - Running MavenWrapperDownloader.java ..."
+ ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$wrapperUrl" "$wrapperJarPath") || rm -f "$wrapperJarPath"
+ fi
+ fi
+ fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+# If specified, validate the SHA-256 sum of the Maven wrapper jar file
+wrapperSha256Sum=""
+while IFS="=" read -r key value; do
+ case "$key" in (wrapperSha256Sum) wrapperSha256Sum=$value; break ;;
+ esac
+done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+if [ -n "$wrapperSha256Sum" ]; then
+ wrapperSha256Result=false
+ if command -v sha256sum > /dev/null; then
+ if echo "$wrapperSha256Sum $wrapperJarPath" | sha256sum -c > /dev/null 2>&1; then
+ wrapperSha256Result=true
+ fi
+ elif command -v shasum > /dev/null; then
+ if echo "$wrapperSha256Sum $wrapperJarPath" | shasum -a 256 -c > /dev/null 2>&1; then
+ wrapperSha256Result=true
+ fi
+ else
+ echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available."
+ echo "Please install either command, or disable validation by removing 'wrapperSha256Sum' from your maven-wrapper.properties."
+ exit 1
+ fi
+ if [ $wrapperSha256Result = false ]; then
+ echo "Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised." >&2
+ echo "Investigate or delete $wrapperJarPath to attempt a clean download." >&2
+ echo "If you updated your Maven version, you need to update the specified wrapperSha256Sum property." >&2
+ exit 1
+ fi
+fi
+
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+ [ -n "$JAVA_HOME" ] &&
+ JAVA_HOME=$(cygpath --path --windows "$JAVA_HOME")
+ [ -n "$CLASSPATH" ] &&
+ CLASSPATH=$(cygpath --path --windows "$CLASSPATH")
+ [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+ MAVEN_PROJECTBASEDIR=$(cygpath --path --windows "$MAVEN_PROJECTBASEDIR")
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $*"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+# shellcheck disable=SC2086 # safe args
+exec "$JAVACMD" \
+ $MAVEN_OPTS \
+ $MAVEN_DEBUG_OPTS \
+ -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+ "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+ ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/mvnw.cmd b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/mvnw.cmd
new file mode 100644
index 0000000..95ba6f5
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/mvnw.cmd
@@ -0,0 +1,205 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements. See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership. The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License. You may obtain a copy of the License at
+@REM
+@REM https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied. See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.2.0
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set WRAPPER_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+ IF "%%A"=="wrapperUrl" SET WRAPPER_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Found %WRAPPER_JAR%
+ )
+) else (
+ if not "%MVNW_REPOURL%" == "" (
+ SET WRAPPER_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+ )
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Couldn't find %WRAPPER_JAR%, downloading it ...
+ echo Downloading from: %WRAPPER_URL%
+ )
+
+ powershell -Command "&{"^
+ "$webclient = new-object System.Net.WebClient;"^
+ "if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+ "$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+ "}"^
+ "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%WRAPPER_URL%', '%WRAPPER_JAR%')"^
+ "}"
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Finished downloading %WRAPPER_JAR%
+ )
+)
+@REM End of extension
+
+@REM If specified, validate the SHA-256 sum of the Maven wrapper jar file
+SET WRAPPER_SHA_256_SUM=""
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+ IF "%%A"=="wrapperSha256Sum" SET WRAPPER_SHA_256_SUM=%%B
+)
+IF NOT %WRAPPER_SHA_256_SUM%=="" (
+ powershell -Command "&{"^
+ "$hash = (Get-FileHash \"%WRAPPER_JAR%\" -Algorithm SHA256).Hash.ToLower();"^
+ "If('%WRAPPER_SHA_256_SUM%' -ne $hash){"^
+ " Write-Output 'Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised.';"^
+ " Write-Output 'Investigate or delete %WRAPPER_JAR% to attempt a clean download.';"^
+ " Write-Output 'If you updated your Maven version, you need to update the specified wrapperSha256Sum property.';"^
+ " exit 1;"^
+ "}"^
+ "}"
+ if ERRORLEVEL 1 goto error
+)
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+ %JVM_CONFIG_MAVEN_PROPS% ^
+ %MAVEN_OPTS% ^
+ %MAVEN_DEBUG_OPTS% ^
+ -classpath %WRAPPER_JAR% ^
+ "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+ %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/pom.xml b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/pom.xml
new file mode 100644
index 0000000..3638fc3
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/pom.xml
@@ -0,0 +1,59 @@
+
+
+ 4.0.0
+
+ org.springframework.boot
+ spring-boot-starter-parent
+ 3.1.3
+
+
+ com.hoangtien2k3
+ Many-To-Many-Bidirectional
+ 0.0.1-SNAPSHOT
+ Many-To-Many-Bidirectional
+ Demo project for Spring Boot
+
+ 17
+
+
+
+ org.springframework.boot
+ spring-boot-starter-data-jpa
+
+
+
+ com.mysql
+ mysql-connector-j
+ runtime
+
+
+ org.projectlombok
+ lombok
+ true
+
+
+ org.springframework.boot
+ spring-boot-starter-test
+ test
+
+
+
+
+
+
+ org.springframework.boot
+ spring-boot-maven-plugin
+
+
+
+ org.projectlombok
+ lombok
+
+
+
+
+
+
+
+
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/ManyToManyBidirectionalApplication.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/ManyToManyBidirectionalApplication.java
new file mode 100644
index 0000000..9086e46
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/ManyToManyBidirectionalApplication.java
@@ -0,0 +1,13 @@
+package com.hoangtien2k3.ManyToManyBidirectional;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ManyToManyBidirectionalApplication {
+
+ public static void main(String[] args) {
+ SpringApplication.run(ManyToManyBidirectionalApplication.class, args);
+ }
+
+}
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/entity/Role.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/entity/Role.java
new file mode 100644
index 0000000..d4b055d
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/entity/Role.java
@@ -0,0 +1,27 @@
+package com.hoangtien2k3.ManyToManyBidirectional.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import jakarta.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+@Getter
+@Setter
+@Entity
+@Table(name = "roles")
+public class Role {
+
+ @Id
+ @GeneratedValue(strategy = GenerationType.IDENTITY)
+ private long id;
+ private String name;
+
+ @ManyToMany(cascade = {
+ CascadeType.PERSIST,
+ CascadeType.MERGE
+ }, fetch = FetchType.EAGER,
+ mappedBy = "roles")
+ private Set users = new HashSet<>();
+}
\ No newline at end of file
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/entity/User.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/entity/User.java
new file mode 100644
index 0000000..f4ca2f7
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/entity/User.java
@@ -0,0 +1,40 @@
+package com.hoangtien2k3.ManyToManyBidirectional.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import jakarta.persistence.*;
+import java.util.HashSet;
+import java.util.Set;
+
+@Getter
+@Setter
+@Entity
+@Table(
+ name = "users",
+ uniqueConstraints = @UniqueConstraint(
+ name = "unique_email",
+ columnNames = "email"
+ )
+)
+public class User {
+ @Id
+ @GeneratedValue(strategy = GenerationType.IDENTITY)
+ private long id;
+ private String firstName;
+ private String lastName;
+ private String email;
+ private String password;
+
+ @ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
+ @JoinTable(
+ name = "users_roles",
+ joinColumns = @JoinColumn(
+ name = "user_id", referencedColumnName = "id"
+ ),
+ inverseJoinColumns = @JoinColumn(
+ name = "role_id", referencedColumnName = "id"
+ )
+ )
+ private Set roles = new HashSet<>();
+}
\ No newline at end of file
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/repository/RoleRepository.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/repository/RoleRepository.java
new file mode 100644
index 0000000..905b731
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/repository/RoleRepository.java
@@ -0,0 +1,7 @@
+package com.hoangtien2k3.ManyToManyBidirectional.repository;
+
+import com.hoangtien2k3.ManyToManyBidirectional.entity.Role;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface RoleRepository extends JpaRepository {
+}
\ No newline at end of file
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/repository/UserRepository.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/repository/UserRepository.java
new file mode 100644
index 0000000..9686d91
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/java/com/hoangtien2k3/ManyToManyBidirectional/repository/UserRepository.java
@@ -0,0 +1,8 @@
+package com.hoangtien2k3.ManyToManyBidirectional.repository;
+
+
+import com.hoangtien2k3.ManyToManyBidirectional.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserRepository extends JpaRepository {
+}
\ No newline at end of file
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/resources/application.properties b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/resources/application.properties
new file mode 100644
index 0000000..72f6504
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/main/resources/application.properties
@@ -0,0 +1,7 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/demojpa?useSSL=false
+spring.datasource.username=root
+spring.datasource.password=12042003
+
+spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQLDialect
+
+spring.jpa.hibernate.ddl-auto = create-drop
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/test/java/com/hoangtien2k3/ManyToManyBidirectional/ManyToManyBidirectionalApplicationTests.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/test/java/com/hoangtien2k3/ManyToManyBidirectional/ManyToManyBidirectionalApplicationTests.java
new file mode 100644
index 0000000..7ecb88e
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Bidirectional/src/test/java/com/hoangtien2k3/ManyToManyBidirectional/ManyToManyBidirectionalApplicationTests.java
@@ -0,0 +1,55 @@
+package com.hoangtien2k3.ManyToManyBidirectional;
+
+import com.hoangtien2k3.ManyToManyBidirectional.entity.Role;
+import com.hoangtien2k3.ManyToManyBidirectional.entity.User;
+import com.hoangtien2k3.ManyToManyBidirectional.repository.RoleRepository;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import java.util.List;
+
+@SpringBootTest
+class ManyToManyBidirectionalApplicationTests {
+
+ @Autowired
+ private RoleRepository roleRepository;
+
+ @Test
+ void saveRole(){
+ User user = new User();
+ user.setFirstName("ramesh");
+ user.setLastName("fadatare");
+ user.setEmail("ramesh@gmail.com");
+ user.setPassword("secrete");
+
+ User admin = new User();
+ admin.setFirstName("admin");
+ admin.setLastName("admin");
+ admin.setEmail("admin@gmail.com");
+ admin.setPassword("admin");
+
+ Role roleAdmin = new Role();
+ roleAdmin.setName("ROLE_ADMIN");
+
+ roleAdmin.getUsers().add(user);
+ roleAdmin.getUsers().add(admin);
+
+ user.getRoles().add(roleAdmin);
+ admin.getRoles().add(roleAdmin);
+
+ roleRepository.save(roleAdmin);
+ }
+
+ @Test
+ void fetchRole(){
+ List roles = roleRepository.findAll();
+ roles.forEach((r) ->{
+ System.out.println(r.getName());
+ r.getUsers().forEach((u) ->{
+ System.out.println(u.getFirstName());
+ });
+ });
+ }
+
+}
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.gitignore b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.gitignore
new file mode 100644
index 0000000..549e00a
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.gitignore
@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.mvn/wrapper/maven-wrapper.jar b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.mvn/wrapper/maven-wrapper.jar
new file mode 100644
index 0000000..cb28b0e
Binary files /dev/null and b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.mvn/wrapper/maven-wrapper.jar differ
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.mvn/wrapper/maven-wrapper.properties b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.mvn/wrapper/maven-wrapper.properties
new file mode 100644
index 0000000..2e76e18
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.4/apache-maven-3.9.4-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/REAMDE.md b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/REAMDE.md
new file mode 100644
index 0000000..42a9718
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/REAMDE.md
@@ -0,0 +1,3 @@
+
+## Many to Many Unidirectional
+![img.png](img.png)
\ No newline at end of file
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/img.png b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/img.png
new file mode 100644
index 0000000..f4593d6
Binary files /dev/null and b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/img.png differ
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/mvnw b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/mvnw
new file mode 100644
index 0000000..66df285
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/mvnw
@@ -0,0 +1,308 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Apache Maven Wrapper startup batch script, version 3.2.0
+#
+# Required ENV vars:
+# ------------------
+# JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+# MAVEN_OPTS - parameters passed to the Java VM when running Maven
+# e.g. to debug Maven itself, use
+# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+# MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+ if [ -f /usr/local/etc/mavenrc ] ; then
+ . /usr/local/etc/mavenrc
+ fi
+
+ if [ -f /etc/mavenrc ] ; then
+ . /etc/mavenrc
+ fi
+
+ if [ -f "$HOME/.mavenrc" ] ; then
+ . "$HOME/.mavenrc"
+ fi
+
+fi
+
+# OS specific support. $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "$(uname)" in
+ CYGWIN*) cygwin=true ;;
+ MINGW*) mingw=true;;
+ Darwin*) darwin=true
+ # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+ # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+ if [ -z "$JAVA_HOME" ]; then
+ if [ -x "/usr/libexec/java_home" ]; then
+ JAVA_HOME="$(/usr/libexec/java_home)"; export JAVA_HOME
+ else
+ JAVA_HOME="/Library/Java/Home"; export JAVA_HOME
+ fi
+ fi
+ ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+ if [ -r /etc/gentoo-release ] ; then
+ JAVA_HOME=$(java-config --jre-home)
+ fi
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+ [ -n "$JAVA_HOME" ] &&
+ JAVA_HOME=$(cygpath --unix "$JAVA_HOME")
+ [ -n "$CLASSPATH" ] &&
+ CLASSPATH=$(cygpath --path --unix "$CLASSPATH")
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+ [ -n "$JAVA_HOME" ] && [ -d "$JAVA_HOME" ] &&
+ JAVA_HOME="$(cd "$JAVA_HOME" || (echo "cannot cd into $JAVA_HOME."; exit 1); pwd)"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+ javaExecutable="$(which javac)"
+ if [ -n "$javaExecutable" ] && ! [ "$(expr "\"$javaExecutable\"" : '\([^ ]*\)')" = "no" ]; then
+ # readlink(1) is not available as standard on Solaris 10.
+ readLink=$(which readlink)
+ if [ ! "$(expr "$readLink" : '\([^ ]*\)')" = "no" ]; then
+ if $darwin ; then
+ javaHome="$(dirname "\"$javaExecutable\"")"
+ javaExecutable="$(cd "\"$javaHome\"" && pwd -P)/javac"
+ else
+ javaExecutable="$(readlink -f "\"$javaExecutable\"")"
+ fi
+ javaHome="$(dirname "\"$javaExecutable\"")"
+ javaHome=$(expr "$javaHome" : '\(.*\)/bin')
+ JAVA_HOME="$javaHome"
+ export JAVA_HOME
+ fi
+ fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+ if [ -n "$JAVA_HOME" ] ; then
+ if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+ # IBM's JDK on AIX uses strange locations for the executables
+ JAVACMD="$JAVA_HOME/jre/sh/java"
+ else
+ JAVACMD="$JAVA_HOME/bin/java"
+ fi
+ else
+ JAVACMD="$(\unset -f command 2>/dev/null; \command -v java)"
+ fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+ echo "Error: JAVA_HOME is not defined correctly." >&2
+ echo " We cannot execute $JAVACMD" >&2
+ exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+ echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+ if [ -z "$1" ]
+ then
+ echo "Path not specified to find_maven_basedir"
+ return 1
+ fi
+
+ basedir="$1"
+ wdir="$1"
+ while [ "$wdir" != '/' ] ; do
+ if [ -d "$wdir"/.mvn ] ; then
+ basedir=$wdir
+ break
+ fi
+ # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+ if [ -d "${wdir}" ]; then
+ wdir=$(cd "$wdir/.." || exit 1; pwd)
+ fi
+ # end of workaround
+ done
+ printf '%s' "$(cd "$basedir" || exit 1; pwd)"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+ if [ -f "$1" ]; then
+ # Remove \r in case we run on Windows within Git Bash
+ # and check out the repository with auto CRLF management
+ # enabled. Otherwise, we may read lines that are delimited with
+ # \r\n and produce $'-Xarg\r' rather than -Xarg due to word
+ # splitting rules.
+ tr -s '\r\n' ' ' < "$1"
+ fi
+}
+
+log() {
+ if [ "$MVNW_VERBOSE" = true ]; then
+ printf '%s\n' "$1"
+ fi
+}
+
+BASE_DIR=$(find_maven_basedir "$(dirname "$0")")
+if [ -z "$BASE_DIR" ]; then
+ exit 1;
+fi
+
+MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}; export MAVEN_PROJECTBASEDIR
+log "$MAVEN_PROJECTBASEDIR"
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+wrapperJarPath="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar"
+if [ -r "$wrapperJarPath" ]; then
+ log "Found $wrapperJarPath"
+else
+ log "Couldn't find $wrapperJarPath, downloading it ..."
+
+ if [ -n "$MVNW_REPOURL" ]; then
+ wrapperUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+ else
+ wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+ fi
+ while IFS="=" read -r key value; do
+ # Remove '\r' from value to allow usage on windows as IFS does not consider '\r' as a separator ( considers space, tab, new line ('\n'), and custom '=' )
+ safeValue=$(echo "$value" | tr -d '\r')
+ case "$key" in (wrapperUrl) wrapperUrl="$safeValue"; break ;;
+ esac
+ done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+ log "Downloading from: $wrapperUrl"
+
+ if $cygwin; then
+ wrapperJarPath=$(cygpath --path --windows "$wrapperJarPath")
+ fi
+
+ if command -v wget > /dev/null; then
+ log "Found wget ... using wget"
+ [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--quiet"
+ if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+ wget $QUIET "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+ else
+ wget $QUIET --http-user="$MVNW_USERNAME" --http-password="$MVNW_PASSWORD" "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
+ fi
+ elif command -v curl > /dev/null; then
+ log "Found curl ... using curl"
+ [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--silent"
+ if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+ curl $QUIET -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+ else
+ curl $QUIET --user "$MVNW_USERNAME:$MVNW_PASSWORD" -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
+ fi
+ else
+ log "Falling back to using Java to download"
+ javaSource="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.java"
+ javaClass="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.class"
+ # For Cygwin, switch paths to Windows format before running javac
+ if $cygwin; then
+ javaSource=$(cygpath --path --windows "$javaSource")
+ javaClass=$(cygpath --path --windows "$javaClass")
+ fi
+ if [ -e "$javaSource" ]; then
+ if [ ! -e "$javaClass" ]; then
+ log " - Compiling MavenWrapperDownloader.java ..."
+ ("$JAVA_HOME/bin/javac" "$javaSource")
+ fi
+ if [ -e "$javaClass" ]; then
+ log " - Running MavenWrapperDownloader.java ..."
+ ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$wrapperUrl" "$wrapperJarPath") || rm -f "$wrapperJarPath"
+ fi
+ fi
+ fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+# If specified, validate the SHA-256 sum of the Maven wrapper jar file
+wrapperSha256Sum=""
+while IFS="=" read -r key value; do
+ case "$key" in (wrapperSha256Sum) wrapperSha256Sum=$value; break ;;
+ esac
+done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
+if [ -n "$wrapperSha256Sum" ]; then
+ wrapperSha256Result=false
+ if command -v sha256sum > /dev/null; then
+ if echo "$wrapperSha256Sum $wrapperJarPath" | sha256sum -c > /dev/null 2>&1; then
+ wrapperSha256Result=true
+ fi
+ elif command -v shasum > /dev/null; then
+ if echo "$wrapperSha256Sum $wrapperJarPath" | shasum -a 256 -c > /dev/null 2>&1; then
+ wrapperSha256Result=true
+ fi
+ else
+ echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available."
+ echo "Please install either command, or disable validation by removing 'wrapperSha256Sum' from your maven-wrapper.properties."
+ exit 1
+ fi
+ if [ $wrapperSha256Result = false ]; then
+ echo "Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised." >&2
+ echo "Investigate or delete $wrapperJarPath to attempt a clean download." >&2
+ echo "If you updated your Maven version, you need to update the specified wrapperSha256Sum property." >&2
+ exit 1
+ fi
+fi
+
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+ [ -n "$JAVA_HOME" ] &&
+ JAVA_HOME=$(cygpath --path --windows "$JAVA_HOME")
+ [ -n "$CLASSPATH" ] &&
+ CLASSPATH=$(cygpath --path --windows "$CLASSPATH")
+ [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+ MAVEN_PROJECTBASEDIR=$(cygpath --path --windows "$MAVEN_PROJECTBASEDIR")
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $*"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+# shellcheck disable=SC2086 # safe args
+exec "$JAVACMD" \
+ $MAVEN_OPTS \
+ $MAVEN_DEBUG_OPTS \
+ -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+ "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+ ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/mvnw.cmd b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/mvnw.cmd
new file mode 100644
index 0000000..95ba6f5
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/mvnw.cmd
@@ -0,0 +1,205 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements. See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership. The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License. You may obtain a copy of the License at
+@REM
+@REM https://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied. See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Apache Maven Wrapper startup batch script, version 3.2.0
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
+if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set WRAPPER_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+ IF "%%A"=="wrapperUrl" SET WRAPPER_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Found %WRAPPER_JAR%
+ )
+) else (
+ if not "%MVNW_REPOURL%" == "" (
+ SET WRAPPER_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
+ )
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Couldn't find %WRAPPER_JAR%, downloading it ...
+ echo Downloading from: %WRAPPER_URL%
+ )
+
+ powershell -Command "&{"^
+ "$webclient = new-object System.Net.WebClient;"^
+ "if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+ "$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+ "}"^
+ "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%WRAPPER_URL%', '%WRAPPER_JAR%')"^
+ "}"
+ if "%MVNW_VERBOSE%" == "true" (
+ echo Finished downloading %WRAPPER_JAR%
+ )
+)
+@REM End of extension
+
+@REM If specified, validate the SHA-256 sum of the Maven wrapper jar file
+SET WRAPPER_SHA_256_SUM=""
+FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+ IF "%%A"=="wrapperSha256Sum" SET WRAPPER_SHA_256_SUM=%%B
+)
+IF NOT %WRAPPER_SHA_256_SUM%=="" (
+ powershell -Command "&{"^
+ "$hash = (Get-FileHash \"%WRAPPER_JAR%\" -Algorithm SHA256).Hash.ToLower();"^
+ "If('%WRAPPER_SHA_256_SUM%' -ne $hash){"^
+ " Write-Output 'Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised.';"^
+ " Write-Output 'Investigate or delete %WRAPPER_JAR% to attempt a clean download.';"^
+ " Write-Output 'If you updated your Maven version, you need to update the specified wrapperSha256Sum property.';"^
+ " exit 1;"^
+ "}"^
+ "}"
+ if ERRORLEVEL 1 goto error
+)
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% ^
+ %JVM_CONFIG_MAVEN_PROPS% ^
+ %MAVEN_OPTS% ^
+ %MAVEN_DEBUG_OPTS% ^
+ -classpath %WRAPPER_JAR% ^
+ "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
+ %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
+if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%"=="on" pause
+
+if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
+
+cmd /C exit /B %ERROR_CODE%
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/pom.xml b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/pom.xml
new file mode 100644
index 0000000..a1402aa
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/pom.xml
@@ -0,0 +1,59 @@
+
+
+ 4.0.0
+
+ org.springframework.boot
+ spring-boot-starter-parent
+ 3.1.3
+
+
+ com.hoangtien2k3
+ Many-To-Many-Unidirectional-Mapping
+ 0.0.1-SNAPSHOT
+ Many-To-Many-Unidirectional-Mapping
+ Demo project for Spring Boot
+
+ 17
+
+
+
+ org.springframework.boot
+ spring-boot-starter-data-jpa
+
+
+
+ com.mysql
+ mysql-connector-j
+ runtime
+
+
+ org.projectlombok
+ lombok
+ true
+
+
+ org.springframework.boot
+ spring-boot-starter-test
+ test
+
+
+
+
+
+
+ org.springframework.boot
+ spring-boot-maven-plugin
+
+
+
+ org.projectlombok
+ lombok
+
+
+
+
+
+
+
+
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/ManyToManyUnidirectionalMappingApplication.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/ManyToManyUnidirectionalMappingApplication.java
new file mode 100644
index 0000000..3426ef4
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/ManyToManyUnidirectionalMappingApplication.java
@@ -0,0 +1,13 @@
+package com.hoangtien2k3;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ManyToManyUnidirectionalMappingApplication {
+
+ public static void main(String[] args) {
+ SpringApplication.run(ManyToManyUnidirectionalMappingApplication.class, args);
+ }
+
+}
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/entity/Role.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/entity/Role.java
new file mode 100644
index 0000000..38a23ac
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/entity/Role.java
@@ -0,0 +1,19 @@
+package com.hoangtien2k3.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+@Getter
+@Setter
+@Builder
+@Entity
+@NoArgsConstructor
+@AllArgsConstructor
+@Table(name = "roles")
+public class Role {
+
+ @Id
+ @GeneratedValue(strategy = GenerationType.IDENTITY)
+ private long id;
+ private String name;
+}
\ No newline at end of file
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/entity/User.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/entity/User.java
new file mode 100644
index 0000000..88b553b
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/entity/User.java
@@ -0,0 +1,52 @@
+package com.hoangtien2k3.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+import java.util.HashSet;
+import java.util.Set;
+
+@Getter
+@Setter
+@Builder
+@Entity
+@NoArgsConstructor
+@AllArgsConstructor
+@Table(name = "users", uniqueConstraints = @UniqueConstraint(
+ name = "unique_email",
+ columnNames = "email"
+))
+public class User {
+
+ @Id
+ @GeneratedValue(strategy = GenerationType.IDENTITY)
+ private long id;
+
+ private String firstName;
+ private String lastName;
+ private String email; // unique
+ private String password;
+
+ @ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
+ @JoinTable(
+ name = "users_roles",
+ joinColumns = @JoinColumn(
+ name = "user_id", referencedColumnName = "id"
+ ),
+ inverseJoinColumns = @JoinColumn(
+ name = "role_id", referencedColumnName = "id"
+ )
+ )
+ private Set roles = new HashSet<>();
+
+ public void add(Role role) {
+ if (role != null) {
+ if (roles == null) {
+ roles = new HashSet<>();
+ }
+
+ roles.add(role);
+ }
+ }
+
+}
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/repository/RoleRepository.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/repository/RoleRepository.java
new file mode 100644
index 0000000..9b41299
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/repository/RoleRepository.java
@@ -0,0 +1,7 @@
+package com.hoangtien2k3.repository;
+
+import com.hoangtien2k3.entity.Role;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface RoleRepository extends JpaRepository {
+}
\ No newline at end of file
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/repository/UserRepository.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/repository/UserRepository.java
new file mode 100644
index 0000000..6466dd5
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/java/com/hoangtien2k3/repository/UserRepository.java
@@ -0,0 +1,8 @@
+package com.hoangtien2k3.repository;
+
+
+import com.hoangtien2k3.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface UserRepository extends JpaRepository {
+}
\ No newline at end of file
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/resources/application.properties b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/resources/application.properties
new file mode 100644
index 0000000..56d8f6f
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/main/resources/application.properties
@@ -0,0 +1,7 @@
+spring.datasource.url=jdbc:mysql://localhost:3306/jparelative?useSSL=false
+spring.datasource.username=root
+spring.datasource.password=12042003
+
+spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQLDialect
+
+spring.jpa.hibernate.ddl-auto = create-drop
diff --git a/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/test/java/com/hoangtien2k3/ManyToManyUnidirectionalMappingApplicationTests.java b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/test/java/com/hoangtien2k3/ManyToManyUnidirectionalMappingApplicationTests.java
new file mode 100644
index 0000000..61b7a36
--- /dev/null
+++ b/Spring-Data-JPA-Hibernate/Many-To-Many-Unidirectional-Mapping/src/test/java/com/hoangtien2k3/ManyToManyUnidirectionalMappingApplicationTests.java
@@ -0,0 +1,86 @@
+package com.hoangtien2k3;
+
+import com.hoangtien2k3.entity.Role;
+import com.hoangtien2k3.entity.User;
+import com.hoangtien2k3.repository.UserRepository;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.Optional;
+
+@SpringBootTest
+class ManyToManyUnidirectionalMappingApplicationTests {
+
+ @Autowired
+ private UserRepository userRepository;
+
+
+ @Transactional
+ @Test
+ void saveUser() {
+ User user = User.builder()
+ .firstName("hoangtien2k3")
+ .lastName("qx1")
+ .email("hoangtien2k3qx1@gmail.com")
+ .password("123456")
+ .build();
+
+ Role admin = Role.builder()
+ .name("ROLE_ADMIN")
+ .build();
+
+ Role customer = Role.builder()
+ .name("ROLE_CUSTOMER")
+ .build();
+
+ user.add(admin);
+ user.add(customer);
+
+ // Lưu đối tượng User vào cơ sở dữ liệu
+ userRepository.save(user);
+ }
+
+
+ @Test
+ void updateUser() {
+ Optional userOptional = userRepository.findById(1L);
+
+ if (userOptional.isPresent()) {
+ User user = userOptional.get();
+
+ user.setFirstName("hoangtien2k3qx1");
+ user.setEmail("hoangtien2k3qx1@gmail.com");
+
+ Role roleUser = new Role();
+ roleUser.setName("ROLE_USER");
+
+ user.add(roleUser);
+
+ userRepository.save(user);
+ } else {
+ // Handle the case when the user is not found, e.g., throw an exception or log an error.
+ }
+ }
+
+
+ @Test
+ void fetchUser(){
+ User user = userRepository.findById(1L).get();
+ System.out.println(user.getEmail());
+ user.getRoles().forEach((r) -> {
+ System.out.println(r.getName());
+ });
+ }
+
+ @Test
+ void deleteUser(){
+ userRepository.deleteById(1L);
+ }
+
+ @Test
+ void contextLoads() {
+ }
+
+}