IDEA激活码
ModelAndView对象是Spring提供的一个对象，可以用来调整具体的JSP视图
1.response.jsp文件：
<a href="user/testModelAndView">测试testModelAndView</a>
2.User.java
@Data
public class User implements Serializable {
private String username;
private String password;
private Integer age;
}
3.UserController.java
@Controller
@RequestMapping("/user")
public class UserController {
//返回值类型为ModelAndView
@RequestMapping("/testModelAndView")
public ModelAndView testModelAndView(){
System.out.println("testString方法执行了..");
//创建ModelAndView对象
ModelAndView mv = new ModelAndView();
//模拟从数据库中查询出User对象
User user= new User();
user.setUsername("meimei");
user.setPassword("123");
user.setAge(30);
//把user对象存储到mv对象中，也会把user对象存储都request对象中
mv.addObject("user",user);
//跳转到哪个页面
mv.setViewName("success");
return mv ;
}
}
4.success.jsp
<html>
<head>
<title>Title</title>
</head>
<body>
<h3>执行成功了</h3>
${user.username}
${user.password}
</body>
</html>
5.springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--开启注解的扫描-->
<context:component-scan base-package="com.hh"/>
<!--视图解析器-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--开启Springmvc注解支持-->
<mvc:annotation-driven/>
</beans>
6.web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<!--配置前端适配器-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--配置解决中文乱码的过滤器-->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
