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

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

%@ 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>
 

%@ 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>