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: HIAPADDate: 2019/12/4Time: 16:10To 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: HIAPADDate: 2019/12/4Time: 14:08To 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>