A标签中传递的中文参数在另一个JSP页面用request.getParameter()接收时出现中文乱码问题
有两个JSP页面:test1.jsp和test2.jsp,两个页面的编码方式都是UTF-8。其中在test.jsp中有一个超链接： <a style = "text-decoration:none;" href = "test6.jsp?title=<%out.println("价格最贵的MP4");%>">超链接</a>。在test2.jsp中用request.getParameter("title")接收，地址栏中都能看到传过来的是中文：“http://localhost:8080/test/test2.jsp?title=价格最贵的MP4”但接收过来的老是乱码,只能显示出MP4这几个英文字母。自己找了老半天还是找不出问题的所在,所以只能请朋友们帮忙看下了。具体代码如下：
<%@ 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 'test1.jsp' starting page</title>
<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>
<a style = "text-decoration:none;" href = "test2.jsp?title=<%out.println("价格最贵的MP4");%>">超链接</a>
</body>
</html>
test2页面
<%@ 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 'test6.jsp' starting page</title>
<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>
<%
//设置接收参数的编码方式
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
String title = null;
if (request.getParameter("title") != null) {
title = (String) request.getParameter("title");
out.println("标题:" + title);
//乱码：标题:ä»·æ ¼æ??è´µç??MP4
}
%>
</body>
</html>
[解决办法]
这样肯定是乱码，一般post方法传送汉字，会经过自己写好的编码转化过滤器经过了转码，这样request得到的值不会乱，而LZ是通过get传送汉字，所以得把request对象重写，增加转码方法。贴下代码吧：
package com.chinaot.web.servlet;import java.io.UnsupportedEncodingException;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Set;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletRequestWrapper;import org.apache.commons.logging.Log;import org.apache.commons.logging.LogFactory;/** * 说明:<br> * * @author 张纪豪 * @version * Build Time Sep 13, 2009 */public class MyHttpServletRequest extends HttpServletRequestWrapper { protected Log log = LogFactory.getLog(getClass()); private static final String ENCODED = "UTF-8",DECODE="ISO8859-1"; public MyHttpServletRequest(HttpServletRequest request) { super(request); } @Override public String getQueryString() { String queryString = super.getQueryString(); if(queryString != null){ try { return new String(queryString.getBytes(DECODE),ENCODED); } catch (UnsupportedEncodingException e) { log.info(e.getMessage(),e); } } return queryString; } @Override public String getParameter(String name) { String value = super.getParameter(name); if (value != null) { try { return new String(value.getBytes(DECODE), ENCODED); } catch (UnsupportedEncodingException e) { log.info(e.getMessage(),e); } } return value; } @SuppressWarnings("unchecked") @Override public Map getParameterMap() { Map<String, String[]> values = super.getParameterMap(); Map<String, String[]> valuesMap = new HashMap<String, String[]>(); Set<String> names = values.keySet(); for (Iterator<String> iter = names.iterator(); iter.hasNext();) { String name= iter.next(); String[] v = values.get(name); if(v != null) { String[] valuesCopy = new String[v.length]; for(int i = 0; i < v.length; i++) { try { valuesCopy[i] = new String(v[i].getBytes(DECODE), ENCODED); } catch (UnsupportedEncodingException e) { log.info(e.getMessage(),e); } } valuesMap.put(name, valuesCopy);// 向新Map放入转码过的值 } } return valuesMap;// 返回是副本 } @Override public String[] getParameterValues(String name) { String[] values = super.getParameterValues(name); if(values != null) { String[] valuesCopy = new String[values.length];//原数组是只读的，不能修改 for(int i = 0; i < values.length; i++) { try { valuesCopy[i] = new String(values[i].getBytes(DECODE), ENCODED); } catch (UnsupportedEncodingException e) { log.info(e.getMessage(),e); } } return valuesCopy; } return values; } }
[解决办法]
<% //设置接收参数的编码方式 //这个setCharacterEncoding只用于post,get是不好使的,//request.setCharacterEncoding("UTF-8"); //response.setCharacterEncoding("UTF-8"); String title = null; if (request.getParameter("title") != null) { //这个比较好用，试试看title = new String(request.getParameter("title").getBytes("iso8859-1"),"utf-8"); out.println("标题:" + title); //乱码：标题:ä»·æ ¼æ??è´µç??MP4 } %>
[解决办法]
使用表单传递参数可以通过get和post方式传递参数,也可以通过连接的方式传递参数,这个传递参数的方式实际上就是get方式传递参数，这种方式传递中文也可以产生乱码
解决方法:修改服务器的<Connector URIEncoding="utf-8">
[解决办法]
你在服务器中把url的？后面的部分转下码。试一试
//url的？后面的部分
String parm = new String(httpServletRequest.getQueryString().getBytes("UTF-8"));
public static String setParam(String param){
String[] params = param.split("&");
String[] setParam = new String[2];
String rtn = "";
for(int i = 0;i < params.length;i++){
setParam = params[i].split("=");
if(setParam.length==2){
try {
rtn += setParam[0] + "=" + URLEncoder.encode(setParam[1], "gbk") + "&";
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
rtn = rtn.substring(0, rtn.length()-1);
System.out.println("rtn = " + rtn);
return rtn;
}
[解决办法]
嗯！用 #2 的解决了！