springMVC获取数据--注意post方法会出现中文乱码问题
1. 新建web project
2. 加入jar
3. 改写web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:config/spring-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
4. src/config 包下写spring-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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<!-- 注解扫描包 -->
<context:component-scan base-package="com.tgb.web.controller" />
<!-- 开启注解 -->
<mvc:annotation-driven/>
<!-- 静态资源访问 -->
<mvc:resources location="/img/" mapping="/img/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<mvc:resources location="/css/" mapping="/css/**"/>
<!-- ViewResolver 视图解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
5. controller文件 UserController.java
package com.tgb.web.controller;
import javax.servlet.http.HttpServletRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.tgb.web.controller.entity.User;
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/addUser")
public String addUser(User user,HttpServletRequest request){
String result = "this is addUser---------优化版";
request.setAttribute("userName", user.getUserName());
request.setAttribute("age", user.getAge());
return "/userManager";
}
@RequestMapping("/delUser")
public String delUser(){
return "";
}
@RequestMapping("/toUser")
public String toUser(){
return "/addUser";
}
}
新建一个POJO实体类, 在一个新的包com.tgb.web.controller.entity下, User.java
package com.tgb.web.controller.entity;
public class User {
private String userName;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
private String age;
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
}
6. addUser.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'addUser.jsp' starting page</title>
</head>
<body>
<h> 添加用户 </h> <br>
<form action="/springMVC5/user/addUser">
姓名: <input type="text" name="userName">
年龄: <input type="text" name="age">
<input type="submit" value="添加">
</form>
</body>
</html>
或者:
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script type="text/javascript" src="../js/jquery-1.4.2.min.js"></script>
<title>My JSP 'addUser.jsp' starting page</title>
<script type="text/javascript">
function addUser(){
var form=document.forms[0];
form.action="/springMVC5/user/addUser";
form.method="get";
form.submit();
}
</script>
</head>
<body>
<h> 添加用户 </h> <br>
<form action="">
姓名: <input type="text" name="userName">
年龄: <input type="text" name="age">
<input type="button" value="添加" onClick="addUser()">
</form>
</body>
</html>
7. userManager.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script type="text/javascript" src="../js/jquery-1.4.2.min.js"></script>
<title>My JSP 'addUser.jsp' starting page</title>
<script type="text/javascript">
</script>
</head>
<body>
<h> 用户管理 </h> <br/>
姓名: ${userName }<br/>
年龄: ${age }
</body>
</html>
8. IE端访问
http://localhost:8080/springMVC5/user/toUser
如果把get改成post会出现乱码的情况, 但是参数传递不会再URL上, get就会显示在URL地址栏里.
web.xml配置一下就可以解决中文乱码问题
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:config/spring-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<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>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
