上一篇博客为了更好的讲解Servlet,专门去实现了Servlet接口来实现Servlet程序,但是实际开发,我们一般不会这么用,大多数时候反而会通过继承HTTPServlet来实现Servlet程序。
代码结构如下:
1.编写一个类去继承HttpServlet
package edu;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class MyHttpServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("MyHttpServlet的doGet方法被调用");
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
System.out.println("MyHttpServlet的doPost方法被调用");
}
}
2.然后去web.xml下配置我们的Servlet程序,在底部添加代码如下:
<servlet>
<servlet-name>MyHttpServlet</servlet-name>
<servlet-class>edu.MyHttpServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>MyHttpServlet</servlet-name>
<url-pattern>/myHttp</url-pattern>
</servlet-mapping>
3.编写一个简单的html文件:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>MyHTTPServlet响应界面</h1>
<form action="http://localhost:8080/ServletDemo/myHttp" method="get">
<button>提交GET请求</button>
</form>
<br>
<form action="http://localhost:8080/ServletDemo/myHttp" method="post">
<button>提交POST请求</button>
</form>
</body>
</html>
4.重启Tomacat服务器,打开网址:http://localhost:8080/servletDemo/myHttp.html,可以看到
点击提交GET请求和提交POST请求,可以看到后台显示: