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Servlet域对象ServletContext小应用------计算网站访问量
1 package cn.yzu; 2 import java.io.IOException; 3 import java.io.PrintWriter; 4 import javax.servlet.ServletContext; 5 import javax.servlet.ServletException; 6 import javax.servlet.http.HttpServlet; 7 import javax.servlet.http.HttpServletRequest; 8 import javax.servlet.http.HttpServletResponse; 9 10 public class AServlet extends HttpServlet { 11 12 public void doGet(HttpServletRequest request, HttpServletResponse response) 13 throws ServletException, IOException { 14 ServletContext application=this.getServletContext(); 15 Integer count=(Integer) application.getAttribute("count"); 16 if(count==null) 17 { 18 count=1; 19 application.setAttribute("count",count); 20 } 21 else 22 application.setAttribute("count",++count); 23 PrintWriter writer=response.getWriter(); 24 writer.print("<h1>"+count+"</h1>"); 25 } 26 public void doPost(HttpServletRequest request, HttpServletResponse response) 27 throws ServletException, IOException { 28 doGet(request, response); 29 } 30 }
Servlet域对象ServletContext小应用------计算网站访问量
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