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import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class mys extends HttpServlet{
public void service(HttpServletRequest rq,HttpServletResponse rp)
throws ServletException,IOException{
PrintWriter out = rp.getWriter();
out.println("hi");
}
}
<servlet>
<servlet-name>myservlet</servlet-name>
<servlet-class>examples.servlets.mys</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>myservlet</servlet-name>
<url-pattern>/helloServlet</url-pattern>
</servlet-mapping>
访问http://127.0.0.1:8080/helloServlet