简单Servlet示例

 package cn.zhao.servlet ;import java.io.IOException ;import java.io.PrintWriter;import javax.servlet.ServletException ;import javax.servlet.http.HttpServlet ;import javax.servlet.http.HttpServletRequest ;import javax.servlet.http.HttpServletResponse ;public class HelloServlet extends HttpServlet{private static final long serialVersionUID = 1L ;protected void doGet( HttpServletRequest req , HttpServletResponse rep ) throws ServletException , IOException {this.doPost( req , rep ) ;}protected void doPost( HttpServletRequest req , HttpServletResponse rep ) throws ServletException , IOException{rep.setContentType( "text/html;charset=gbk" ) ;PrintWriter out = rep.getWriter() ;out.println( "<font color=red ><h1>大家好，这是一个Servlet!!!!!</h1></font>" ) ;out.close() ;}}

 

<?xml version="1.0" encoding="UTF-8"?><web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>HelloServlet</servlet-name> <servlet-class>cn.zhao.servlet.HelloServlet</servlet-class> </servlet><servlet-mapping><servlet-name>HelloServlet</servlet-name><url-pattern>/hello</url-pattern></servlet-mapping></web-app>