Spring入门之eclipse.md

Spring入门之eclipse

一、环境配置

• 1、安装spring开发插件

  • help->Eclipse Marketplace->搜索spring tools

    

• 2、导入jar包(spring需要beans,core,context,expression(Spel)4个基础包+日志实现(common-logging+log4j)附加包)

  <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.14.RELEASE</version>
  </dependency>
  <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.14.RELEASE</version>
  </dependency>
  <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.14.RELEASE</version>
  </dependency>
  <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>4.3.13.RELEASE</version>
  </dependency>
  <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.2</version>
  </dependency>
  <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
  </dependency>
  

  

• 3、Hello World

  • 新建bean --Student

     package com.edu.bean;
    
     public class Student {
         private String name;
         private String gender;
    
         public String getName() {
             return name;
         }
    
         public void setName(String name) {
             this.name = name;
         }
    
         public String getGender() {
             return gender;
         }
    
         public void setGender(String gender) {
             this.gender = gender;
         }
    
         @Override
         public String toString() {
             return "Student [name=" + name + ", gender=" + gender + "]";
         }
     }     
    

  • 之前创建对象的传统方式

     public class StudentTest {
         @Test
         public void test1() {
             Student student = new Student();
             student.setName("小明");
             student.setGender("男");
             System.out.println(student);
         }
     }
    

• 4、spring使用方式：

  • 在resource资源文件夹下新建 ->other ->spring

    

  • 起名spring.xml

      <?xml version="1.0" encoding="UTF-8"?>
      <beans xmlns="http://www.springframework.org/schema/beans"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://www.springframework.org/schema/beans 
                            http://www.springframework.org/schema/beans/spring-beans.xsd">
    
          <!-- 配置bean -->
          <bean id="student" class="com.edu.bean.Student">
              <property name="name" value="小红"></property>
              <property name="gender" value="女"></property>
          </bean>
      </beans>
    

二、测试

package com.edu;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.edu.bean.Student;

public class StudentTest {
    @Test
    public void testSpringBean() {
        //1.创建ioc容器对象：
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
        //2.从容器中获得维护的Student实例

        //通过id
        Student student1 = (Student)applicationContext.getBean("student");
        //通过类名
        Student student2 = applicationContext.getBean(Student.class);

        System.out.println(student1);
        System.out.println(student2);
    }
}