jsp servlet之hello world-优快云博客

本文链接：https://blog.youkuaiyun.com/xuqianghit/article/details/5929066

1.编写servlet类。

这里只是一个简单的servlet，实际的应用过程中可能需要在其中实现复杂的代码。

上面是使用eclipse生成类的简单实现。这个类只是重写了httpservlet的doGet方法。代码如下：

/** * */ package com.jefferyxu; 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; /** * @author jefferyxu * */ public class HelloWorldServlet extends HttpServlet { /* (non-Javadoc) * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) */ @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // TODO Auto-generated method stub PrintWriter writer = resp.getWriter(); writer.print("Hello World !"); } /** * */ private static final long serialVersionUID = 1L; /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub } }

2.修改web.xml文件。

<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" 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_2_5.xsd"> <servlet> <servlet-name>HelloWorldServlet</servlet-name> <servlet-class>com.jefferyxu.HelloWorldServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>HelloWorldServlet</servlet-name> <url-pattern>/HelloWorldServlet.action</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <login-config> <auth-method>BASIC</auth-method> </login-config> </web-app>