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Servlet實(shí)現(xiàn)統(tǒng)計(jì)頁(yè)面訪問次數(shù)功能

更新時(shí)間：2021年04月08日 11:25:15 作者：Putarmor

這篇文章主要介紹了Servlet實(shí)現(xiàn)統(tǒng)計(jì)頁(yè)面訪問次數(shù)功能，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了Servlet實(shí)現(xiàn)統(tǒng)計(jì)頁(yè)面訪問次數(shù)的具體代碼，供大家參考，具體內(nèi)容如下

實(shí)現(xiàn)思路：

1.新建一個(gè)CallServlet類繼承HttpServlet，重寫doGet（）和doPost（）方法；

2.在doPost方法中調(diào)用doGet（）方法，在doGet()方法中實(shí)現(xiàn)統(tǒng)計(jì)網(wǎng)站被訪問次數(shù)的功能，用戶每請(qǐng)求一次servlet，使得訪問次數(shù)times加1；

3.獲取ServletContext，通過它的功能記住上一次訪問后的次數(shù)。

在web.xml中進(jìn)行路由配置：

<!-- 頁(yè)面訪問次數(shù) -->
  <servlet>
    <servlet-name>call</servlet-name>
    //CallServlet為處理前后端交互的后端類
    <servlet-class>CallServlet</servlet-class>  
  </servlet>
  <servlet-mapping>
    <servlet-name>call</servlet-name>
    <url-pattern>/call</url-pattern>
</servlet-mapping>

CallServlet類：

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
 */

//獲得網(wǎng)站被訪問的次數(shù)
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("頁(yè)面訪問統(tǒng)計(jì)");
        out.println("</title></head><body>");
        out.println("當(dāng)前頁(yè)面被訪問了");
        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);
    }
}