1.新建一个类ShowTimesServlet继承HttpServlet,重写doGet和doPost方法 2.在doPost方法中调用doGet方法,在方法中实现统计网站被访问次数到的功能,用户没请求一次servlet,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
时间: 2024-01-21 15:16:51 浏览: 392
实验3 Servlet基础.docx
好的,下面是示例代码:
```java
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletContext;
public class ShowTimesServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private int times = 0;
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
response.getWriter().println("网站被访问次数:" + times);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
ServletContext context = getServletContext();
Integer count = (Integer) context.getAttribute("count");
if (count == null) {
count = 1;
} else {
count++;
}
context.setAttribute("count", count);
times = count;
}
}
```
在该示例中,我们创建了一个名为`ShowTimesServlet`的类,它继承自`HttpServlet`并覆盖了`doGet()`和`doPost()`方法。在`doPost()`方法中,我们首先调用了`doGet()`方法,以显示当前网站的访问次数。然后,我们使用`ServletContext`来获取之前记录的访问次数,并将其递增1。最后,我们将增加后的访问次数存储回`ServletContext`中,并将其赋值给`times`变量,以便下一次调用`doGet()`方法时可以正确地显示访问次数。
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