springMVC获取数据--注意post方法会出现中文乱码问题

时间：2022-11-16 09:46:35

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>

　　

　

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