javaweb 在页面中通过setheader请求头设置动态时钟

向右看齐 2023-06-19 14:27 17阅读 0赞

package com.my.servlet;
    
    import java.io.IOException;
    import java.io.PrintWriter;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    /**
     * Servlet implementation class ResponseRefreshHeadServlet
     */
    @WebServlet("/ResponseRefreshHeadServlet")
    public class ResponseRefreshHeadServlet extends HttpServlet {
    	private static final long serialVersionUID = 1L;
           
        /**
         * @see HttpServlet#HttpServlet()
         */
        public ResponseRefreshHeadServlet() {
            super();
            // TODO Auto-generated constructor stub
        }
    
    	/**
    	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
    	 */
    	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		//利用设置响应消息头设置动态时钟的效果
    		response.setContentType("text/html;charset=UTF-8");
    		response.setHeader("refresh", "1");
    		
    		PrintWriter out = response.getWriter();
    		out.println("现在时间是：");
    		SimpleDateFormat sdf = new SimpleDateFormat("YYYY-MM-DD- HH:mm:ss");
    		out.println(sdf.format(new Date()));
    		System.out.println("yes");
    	}
    
    	/**
    	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
    	 */
    	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		// TODO Auto-generated method stub
    		doGet(request, response);
    	}
    
    }