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out.println("<a href='second.jsp?&name=" + URLEncoder.encode("中国","utf-8") + "'>中国</a>");
String name = request.getParameter("name");
System.out.println(name);//涓浗
System.out.println(URLDecoder.decode(name,"utf-8"));//涓浗
name = new String(name.getBytes("GBK"),"utf-8");
<%@ page import="java.net.*" contentType="text/html;charset=utf-8"%>
<html>
<head>
<title>My JSP 'csdn.jsp' starting page</title>
</head>
<body>
<br>
<a href="csdn2.jsp?name=<%=URLEncoder.encode("中国", "utf-8")%>">查看</a><br>
</body>
</html>
<%@ page contentType="text/html;charset=utf-8"%>
<html>
<head>
<title>My JSP 'csdn.jsp' starting page</title>
</head>
<body>
<br>
<%=new String(request.getParameter("name").getBytes("iso8859-1"), "utf-8")%>
<br>
</body>
</html>
String name = request.getParameter("name");
System.out.println(name);//涓浗
System.out.println(URLDecoder.decode(name,"utf-8"));//涓浗