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SpringMVC_rest风格.md

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SpringMVC_rest风格

一、rest风格url

  • rest风格url 有get(查询),post(新增)，put(修改)，delete(删除)

    eg:

      /student/1 get --查询id是1的学生

  /student/1 put --修改id是1的学生信息

  /student/1 delete --删除id是1的学生

  /student/ -post --新增学生信息

二、我们可以配置一个过滤器HiddenHttpMethodFilter把post请求转换位put请求和delete请求(web.xml)

<filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

  • 然后在发post请求的时候多传一个参数 ：_method : put/delete

    • delete请求

      eg：

        <form action="${pageContext.request.contextPath}/spring/student/2" method="post">
      <input type="hidden" name="_method" value="delete"/>
      <input type="submit" value="aaa"/>
  </form>


  @RequestMapping(value="/student/{id}",method=RequestMethod.DELETE)
  @ResponseBody    //如果delete或put请求报405需要加此注解
  public String studentDELETE(@PathVariable("id") int id) {
      System.out.println("delete"+id);
      return "success";
  }

    • put请求

      eg:

        <form action="${pageContext.request.contextPath}/spring/student/2" method="post">
      <input type="hidden" name="_method" value="put"/>
      <input type="submit" value="aaa"/>
  </form>

  @RequestMapping(value="/student/{id}",method=RequestMethod.PUT)
  @ResponseBody //如果delete或put请求报405需要加此注解
  public String studentPUT(@PathVariable("id") int id) {
      System.out.println("put"+id);
      return "success";
  }

三、实例

  • delete

    • webapp/rest.jsp

        <%--
    Created by IntelliJ IDEA.
    User: sunny
    Date: 2018/8/13
    Time: 15:29
    To change this template use File | Settings | File Templates.
  --%>
  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  <html>
  <head>
      <title>Title</title>
      <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
  </head>
  <body>
      <%--<form action="${pageContext.request.contextPath}/student/delete/2" method="post">--%>
      <form action="${pageContext.request.contextPath}/student/delete/2" method="post">
          <%--<input type="text" name="_method" value="delete"/>--%>
              <input type="hidden" name="_method" value="delete"/>
          <input type="submit" value="提交"/>
      </form>
  </body>
  </html>

    • StudentController.java

        @Controller
  @RequestMapping("/student")
  public class StudentController {
      @RequestMapping(value="/delete/{id}",method= RequestMethod.DELETE)
      @ResponseBody    //如果delete或put请求报405需要加此注解
      public String testDELETE(@PathVariable("id") Integer id) {
          System.out.println("delete"+id);
          return "delete";
      }
  }

  • put

    • webapp/rest.jsp

        <%--
    Created by IntelliJ IDEA.
    User: sunny
    Date: 2018/8/13
    Time: 15:29
    To change this template use File | Settings | File Templates.
  --%>
  <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  <html>
  <head>
      <title>Title</title>
      <script src="https://cdn.bootcss.com/jquery/3.3.1/jquery.js"></script>
  </head>
  <body>
      <form action="${pageContext.request.contextPath}/student/put/2" method="post">
          <%--<input type="text" name="_method" value="put"/>--%>
              <input type="hidden" name="_method" value="put"/>
          <input type="submit" value="提交"/>
      </form>
  </body>
  <script>
      <%--$.post('${pageContext.request.contextPath}/student/put/3',--%>
                              <%--{'_method':'put'},function (r) {--%>
          <%--alert(r);--%>
      <%--});--%>
  </script>
  </html>

    • StudentController.java

        @Controller
  @RequestMapping("/student")
  public class StudentController {
      @RequestMapping(value = "/put/{id}",method = RequestMethod.PUT)
      @ResponseBody
      public String testPUT(@PathVariable("id") Integer id){
          System.out.println("put"+id);
          return "put";
      }
  }