Mac 重新安装系统

准备条件

1. eclipse
2. jdk1.8 （配置jdk环境）
3. apache-tomcat-8.5.97（记住安装位置）

一

点击完成

开始创建javaweb项目

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class test extends HttpServlet {

    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取 PrintWriter 对象
    	   response.setCharacterEncoding("UTF-8");
    	   response.setContentType("text/plain; charset=UTF-8");
        PrintWriter pw = response.getWriter();
        // 输出 Hello World
        pw.print("输出 Hello World");
    }
}

 目录结构如下：

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class test extends HttpServlet {

    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取 PrintWriter 对象
    	   response.setCharacterEncoding("UTF-8");
    	   response.setContentType("text/plain; charset=UTF-8");
        PrintWriter pw = response.getWriter();
        // 输出 Hello World
        pw.print("输出 Hello World");
    }
}