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Tips: Professional Systems Development app, and it also is not a party platform did not have any relationship, if you're a player, the following article is for reference only, can develop similar.
WebServlet(urlPatterns="/demoServlet")
public class DemoServlet extends HttpServlet{
Override
protected void doPost(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException{
doGet(req,resp);
Override
protected void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
request.setCharacterEncoding("UTF-8");
String k1=request.getParameter("k1");
System.out.println(k1);
String k2=request.getParameter("k2");
String res=new String(k2.getBytes("UTF-8"),"UTF-8");
System.out.println(res);
<%page import="java.net.URLEncoder"%>
<%page contentType="text/html;charset=UTF-8"language="java"%>
<html>
<head>
<title>login</title>
<meta http-equiv="Content-Type"content="text/html;charset=UTF-8"/>
</head>
<body>
<a href='/demoServlet?k1=abcd&k2=我爱编程'>URL中文</a><br>
</body>
</html>