springmvc的helloworld(2)

最新推荐文章于 2025-11-26 15:59:01 发布

原创最新推荐文章于 2025-11-26 15:59:01 发布 · 116 阅读

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#java #web.xml #ui

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本文介绍如何在SpringMVC中通过GET和POST方法接收页面参数，并解决中文乱码问题。首先展示了index.jsp页面的代码，包括两个提交按钮分别对应GET和POST请求。接着详细解释了HelloworldAction类中处理请求的方法，以及如何使用@RequestParam注解来获取参数。最后给出了针对GET和POST请求的中文乱码解决方案。

这篇文章的代码基于上一篇文章《springmvc的helloworld(1)》，讲如何在springmvc如何接收页面参数。

第一步：

index.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  
  <body>
    <form action="helloworld.do">
    	userName:<input type="text" name="userName"><br>
    	<input type="submit" value="提交">
    </form>
    <form action="helloworldPost.do" method="post">
    	userName:<input type="text" name="userName"><br>
    	<input type="submit" value="提交">
    </form>
  </body>
</html>

第二步：

修改HellowolrdAction:

package com.action;

import java.util.List;

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



@Controller
public class HelloworldAction {
	@RequestMapping(value = "/helloworld.do")
	public String hellowolrd(Model model,@RequestParam("userName") String userName ) {
		model.addAttribute("userName", userName);
		return "result";
	}
	@RequestMapping(value = "/helloworld.do", method = RequestMethod.POST)
	public String hellowolrdPost(Model model,@RequestParam("userName") String userName ) {
		model.addAttribute("userName", userName);
		return "result";
	}
}

第三步：

传递阐述会出现中文乱码问题

1，get请求。在tomcat中加上URIEncoding="utf-8"。如：

 <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" URIEncoding="utf-8"/>

2，post请求，在web.xml加上Character Encoding filter

<!-- Character Encoding filter -->
	<filter>
		<filter-name>encodingFilter</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>encodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>