解决：error during artifact deployment. See server log for details.

error during artifact deployment. See server log for details.

部署期间出错

出现这种情况的原因有很多！每一步都不能出问题，

首先我们创建的项目是

建好项目别忘了添加框架支持！！！

然后

 我出的问题就是这个！

下一步是添加jar包

找到项目

package com.bjpowernode.javaweb.servlet;

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

@WebServlet(name = "hello",urlPatterns = {"/hello1","/hello2","/hello3"}, loadOnStartup = 1 ,
initParams = {@WebInitParam(name = "username",value = "root"), @WebInitParam(name="password",value = "123")})

public class HelloServlet extends HttpServlet {
    //无参构造方法
    public HelloServlet() {
        System.out.println("无参构造方法执行。HelloServlet加载完成");
    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

    }
}

程序写好要跑了！但是别忘了！小猫咪！

该加的加！

 改配的配！

 最后别忘了！看看是不是代码出错了？

常用快捷键：

重写方法用：Ctrl+o

idea生成无参构alt（+fn）+insert,选择constructor,选择select none ,就是无参构造。