本文实例为大家分享了Servlet实现统计页面访问次数的具体代码，供大家参考，具体内容如下
实现思路：
1.新建一个CallServlet类继承HttpServlet，重写doGet（）和doPost（）方法；
2.在doPost方法中调用doGet（）方法，在doGet()方法中实现统计网站被访问次数的功能，用户每请求一次servlet，使得访问次数times加1；
3.获取ServletContext，通过它的功能记住上一次访问后的次数。
在web.xml中进行路由配置：
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<!-- 页面访问次数 --> < servlet > < servlet-name >call</ servlet-name > //CallServlet为处理前后端交互的后端类 < servlet-class >CallServlet</ servlet-class > </ servlet > < servlet-mapping > < servlet-name >call</ servlet-name > < url-pattern >/call</ url-pattern > </ servlet-mapping > |
CallServlet类：
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import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter;
/** * Created with IntelliJ IDEA * Details about unstoppable_t: * User: Administrator * Date: 2021-04-07 * Time: 14:57 */
//获得网站被访问的次数 public class CallServlet extends HttpServlet { private static final long serialVersionUID = 1L; @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setContentType( "text/html;charset=utf-8" ); ServletContext context = getServletContext(); Integer times = (Integer) context.getAttribute( "times" ); if (times == null ) { times = new Integer( 1 ); } else { times = new Integer(times.intValue() + 1 ); } PrintWriter out= resp.getWriter(); out.println( "<html><head><title>" ); out.println( "页面访问统计" ); out.println( "</title></head><body>" ); out.println( "当前页面被访问了" ); out.println( "<font color=red size=20>" +times+ "</font>次" ); context.setAttribute( "times" ,times); }
@Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { this .doGet(req,resp); } } |
前端展示结果：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
原文链接：https://blog.csdn.net/weixin_44874269/article/details/115487251
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