#SpringMVC：Model、ModelAndView @FDDLC_综合

Model核心代码：

@RequestMapping("/test")
public String test(Model model) {String name = "Tom";model.addAttribute("name", name);return "success";
}

ModelAndView核心代码：

@RequestMapping("/test2")
public ModelAndView test2() {String name = "Jack";ModelAndView mv = new ModelAndView();mv.addObject("name", name);mv.setViewName("success");return mv;
}

项目结构：

pom.xml的内容：

<?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>P054_Model_ModelAndView</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><name>P054_Model_ModelAndView 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>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.1.8.RELEASE</version></dependency></dependencies><build><finalName>P054_Model_ModelAndView</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>

web.xml的内容：

<!DOCTYPE web-app PUBLIC"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN""http://java.sun.com/dtd/web-app_2_3.dtd" ><web-app><display-name>Archetype Created Web Application</display-name><servlet><servlet-name>dispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><!--关联springmvc.xml，让其中的配置生效！--><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:springmvc.xml</param-value></init-param></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><url-pattern>/</url-pattern></servlet-mapping>
</web-app>

springmvc.xml的内容：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"><mvc:component-scan base-package="cn.liuxingchang.controller"></mvc:component-scan>
</beans>

index.jsp的内容：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<a href="test">Model</a><br/>
<a href="test2">ModelAndView</a>
</body>
</html>

success.jsp的内容：

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head><title>Title</title>
</head>
<body>
<h3>获取name的方式1：${requestScope.name}</h3>
<h3>获取name的方式2：${name}</h3>
</body>
</html>

HelloController.java的内容：

package cn.liuxingchang.controller;import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;@Controller
public class HelloController {@RequestMapping("/test")public String test(Model model) {String name = "Tom";model.addAttribute("name", name);return "success";}@RequestMapping("/test2")public ModelAndView test2() {String name = "Jack";ModelAndView mv = new ModelAndView();mv.addObject("name", name);mv.setViewName("success");return mv;}
}