程序
package com.zzk.cn;
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 HelloWorldServlet extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1L;//父类或者父类的父类实现了序列化的接口
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
PrintWriter out=resp.getWriter();
out.println("<html><head></head><body><center><font color='red'>HelloWorldServlet!</font></center></body></html>");
out.flush();//清理
out.close();//关闭
}
}
编译自动在COM.ZZK.CN文件夹下生成CLASS
WEB配置文件是这么写的
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0"
metadata-complete="true">
<servlet>
<servlet-name>Myfirstservlet</servlet-name>
<servlet-class>com.zzk.cn.HelloWorldServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Myfirstservlet</servlet-name>
<url-pattern>/HelloWorldServlet</url-pattern>
</servlet-mapping>
</web-app>
页面展示
HelloWorldServlet!
页面打开的源文件
<html><head></head><body><center><font color='red'>HelloWorldServlet!</font></center></body></html>
