1、新建项目

2、填写项目名称（MyFirstServlet）

3、项目创建成功后的目录初始结构

4、配置

（1）在WEB-INFO目录下创建classes和lib目录

classes：用于存放编译后的class lib：用于存放依赖包

（2）打开Project Structure（默认快捷键Ctrl+Alt+Shift+S 或者 File 菜单 -> Project Structure...），配置compiler output

（3）打开Project Structure（默认快捷键Ctrl+Alt+Shift+S 或者 File 菜单 -> Project Structure...），配置依赖包

5、第一个Servlet类

（1）创建Servlet类

（2）编写代码

package com.idark;

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(name = "DemoServlet",urlPatterns = "/myFirstServlet")
public class DemoServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request,response);
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        PrintWriter write = response.getWriter();
        write.print("Hello , This is my first servlet");
    }
}

（3）启动tomcat（SHIFT+F10）

（4）访问http://localhost:8080/myFirstServlet