javaee springMVC Map ModelMap ModelAndView el和jstl的使用

pom依赖

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.example</groupId>
  <artifactId>TestSpringMVC3</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>TestSpringMVC3 Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

    <!-- Spring -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>


    <!-- 导入SpringMvc 需要的jar包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>

    <!-- 配置servlet-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>


    <!-- jstl -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- 1.2以下的版本 需要加standard架包 -->
    <!--
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    -->

  </dependencies>

  <build>
    <finalName>TestSpringMVC3</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

controller

package com.test.controller;

import com.test.pojo.Address;
import com.test.pojo.Users;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

@Controller
@RequestMapping("/users")
//指定放入model中的某个变量 存入session中
@SessionAttributes(value="sessionUser2")
public class UsersController {


    @RequestMapping("/getUser2")
    public String getUser2(Map map)
    {
        Users user=new Users(2,"xiaodaimenglaoshi","888",new Address(1,"shanghai"),new Date(),888888);

        map.put("user",user);

        return "showUser";

    }

    @RequestMapping("/getUser3")
    public String getUser3(ModelMap map)
    {
        Users user=new Users(3,"daimenglaoshi3","888",new Address(1,"shanghai"),new Date(),888888);

        map.put("user",user);

        return "showUser";

    }

    @RequestMapping("/getUser4")
    public ModelAndView getUser4()
    {
        Users user=new Users(4,"daimenglaoshi4","888",new Address(1,"shanghai"),new Date(),888888);

        //将要转发的数据和页面的名称 都存入ModelAndView对象
        ModelAndView modelAndView=new ModelAndView();

        modelAndView.addObject("user",user);

        modelAndView.setViewName("showUser");

        return modelAndView;
    }

    @RequestMapping("/getUser5")
    public ModelAndView getUser5()
    {
        List<Users> usersList=new ArrayList<Users>();

        usersList.add(new Users(1,"daimenglaoshi1","888",new Address(1,"shanghai"),new Date(),888888));
        usersList.add(new Users(2,"daimenglaoshi2","888",new Address(1,"shanghai"),new Date(),888888));
        usersList.add(new Users(3,"daimenglaoshi3","888",new Address(1,"shanghai"),new Date(),888888));

        ModelAndView modelAndView=new ModelAndView();

        modelAndView.addObject("usersList",usersList);

        modelAndView.setViewName("showUsersList");

        return modelAndView;

    }

   






}

jsp

<%--
  Created by IntelliJ IDEA.
  User: HIAPAD
  Date: 2019/12/4
  Time: 16:10
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
    <title>Title</title>
</head>
<body>

<c:forEach var="user" items="${usersList}">

      ${user.uname}<br/>

</c:forEach>

</body>
</html>

<%--
  Created by IntelliJ IDEA.
  User: HIAPAD
  Date: 2019/12/4
  Time: 14:08
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
${user.uname}
</body>
</html>