1。servlet代码：

如果用包直接加上包就好：例如 package lcy;

import javax.servlet.http.*;
import java.io.*;

public class HelloHttp extends HttpServlet {
    
     public void doGet(HttpServletRequest request, HttpServletResponse response) {
        
         try {
             PrintWriter pw = response.getWriter();
             pw.println(encoding("welcome java"));