servlet程序，顯示當前日期

servlet程序，顯示當前日期

package Servlet;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * @Author JackFan
 * @data 2020/4/13-13:20
 */
public class Frist_FirstServlet extends javax.servlet.http.HttpServlet {
    private String message;
	//init方法只會執行一次
    @Override
    public void init() throws ServletException
    {
        // 初始化
        SimpleDateFormat data= new SimpleDateFormat("yyyy年MM月dd日 ");
        //設置日期格式
        message=data.format(new Date());
        

    }

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

    }

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 設置:響應內容類型、編碼格式
        response.setContentType("text/html;charset=utf-8");
        // 輸出文本
        PrintWriter out = response.getWriter();
        out.write("<h2> 歡迎光臨我的網站，今天是" + message + " </h2>");
    }

}

結果：