idea中java及java web项目的常见问题及解决

package com.rainpet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet("/Demo1")
public class Demo1 extends HttpServlet {
    String message="hello";
    @Override
    public void init() throws ServletException {
        //super.init();
        this.message="hello world 2322";
        System.out.println("init 执行了2222！");
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //super.doGet(req, resp);
        resp.setContentType("text/html;charset=utf-8");
        req.setCharacterEncoding("utf-8");
        PrintWriter out = resp.getWriter();
        out.println("The Parameter are 222222222  123123："+req.getParameter("name1")+" message222222222666:"+this.message);
        //out.println("The Parameter are ：");
    }
}