转码：a.href="./showCont.jsp?tcontent="+encodeURI(encodeURI(tcontent));

解码：java.net.URLDecoder.decode((String)request.getParameter("tcontent"), "UTF-8");


例,a.jsp源代码:

<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>无标题文档</title> 
</head>
 
<body> 
<% 
       String str_test = "华工"; 
%> 
<form method=post action="b.jsp?test=<%=java.net.URLEncoder.encode(str_test) %>"> 
         <input type="submit" value="Submit" name="提交">  
</form>
</body> 
</html>

b.jsp源代码

<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %> 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>无标题文档</title> 
</head>
 
<body>
<% 
       String str = new String(request.getParameter("test").getBytes("ISO8859_1")); 
%> 
<BR> 
<%=str %> 
</body> 
</html>