浏览器地址栏请求：http:localhost:8080/springmvc_hello/hello?username=kk

web.xml:


<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <servlet>
    <servlet-name>hello</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>hello</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  <filter>
    <filter-name>CharacterFilter</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>CharacterFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>



 

hello-servlet.xml:



<?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:context="http://www.springframework.org/schema/context"
  xmlns:mvc="http://www.springframework.org/schema/mvc"
  xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
  
  <context:component-scan base-package="zttc.itat.controller"/>
  <mvc:annotation-driven/>
  <!-- 将静态文件指定到某个特殊的文件夹中统一处理 -->
  <mvc:resources location="/resources/" mapping="/resources/**"/>
  <bean name="/welcome.html" class="zttc.itat.controller.WelcomeController"></bean>
  
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
    <property name="prefix" value="/WEB-INF/jsp/"/>
    <property name="suffix" value=".jsp"/>
  </bean>
  
  <!-- 设置multipartResolver才能完成文件上传 -->
  <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="5000000"></property>
  </bean>
  
  <bean id="exceptionResolver" class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
    <property name="exceptionMappings">
      <props>
        <prop key="zttc.itat.model.UserException">error</prop>
      </props>
    </property>
  </bean>
</beans>



 

HelloController.java:

package zttc.itat.controller;


import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HelloController {
  
  //RequestMapping表示用那个url来对应
  @RequestMapping({"/hello","/"})
  public String hello(String username,Model model) {
    System.out.println("hello");
    model.addAttribute("username", username);
    //此时用那个作为key?它默认是使用对象的类型作为key-->model.addAttribute("string",username)
    //model.addAttribute(new User());-->addAtt("user",new User());
    model.addAttribute(username);
    System.out.println(username);
    return "hello";
  }
  
  @RequestMapping("/welcome")
  public String welcome() {
    return "welcome";
  }
  
}

 

hello.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>hello ${username }!!</h1>
${string }
</body>
</html>