Servlet----------通过 GenericServlet 开发Servlet

通过继承GenericServlet抽象类。只需要重写service()方法即可。(这个知识点了解即可)

 package cn.servlet;

 import java.io.IOException;
 import java.io.PrintWriter;

 import javax.servlet.GenericServlet;
 import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;

 public class MyGenericServlet extends GenericServlet{

     @Override
     public void service(ServletRequest req, ServletResponse resp)
             throws ServletException, IOException {
         resp.setCharacterEncoding("GBK");
          resp.getWriter().println("中文！");
          resp.getWriter().print("hello,我继承了GenericServlet");

     }
 }

XML部署：

<servlet>
    <servlet-name>mygenericservlet</servlet-name>
    <servlet-class>cn.servlet.MyGenericServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>mygenericservlet</servlet-name>
    <url-pattern>/servlet/MyGenericServlet</url-pattern>
</servlet-mapping>