［java web 入门］（一）MyEclipse & HelloWorld 记录

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第一部，下载安装MyEclipse for mac.

http://downloads.myeclipseide.com/downloads/products/eworkbench/2014/installers/myeclipse-spring-2014-GA-offline-installer-macosx.dmg
http://downloads.myeclipseide.com/downloads/products/eworkbench/2014/installers/myeclipse-pro-2014-GA-offline-installer-macosx.dmg

第二部，helloWorld

1,新建项目

2, 新建MyServlet类，继承字HttpServlet，重写doGet和doPost方法，调用process方法响应请求。

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;@SuppressWarnings("serial")public class MyServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {process(req,resp);}@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {process(req,resp);}/** * @param req * @param resp * @throws ServletException * @throws IOException */protected void process(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {resp.setContentType("text/html");PrintWriter out = resp.getWriter();out.println("<HTML><HEAD><TITLE>My First Servlet</TITLE></HEAD>");out.println("<BODY>");out.println("<H1>Hello , Jason Hu</H1>");out.println("</BODY></HTML>");}}

3，在web.xml中配置servlet及servlet-mapping

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">  <display-name>web01</display-name>  <welcome-file-list>    <welcome-file>index.html</welcome-file>    <welcome-file>index.htm</welcome-file>    <welcome-file>index.jsp</welcome-file>    <welcome-file>default.html</welcome-file>    <welcome-file>default.htm</welcome-file>    <welcome-file>default.jsp</welcome-file>  </welcome-file-list>    <servlet>  <servlet-name>MyFirstServlet</servlet-name>  <servlet-class>com.jason.web.helloworld.MyServlet</servlet-class>  </servlet>    <servlet-mapping>  <servlet-name>MyFirstServlet</servlet-name>  <url-pattern>/MyServlet</url-pattern>  </servlet-mapping>  </web-app>

4,运行项目，http://192.168.1.117:8080/HelloWorld/MyServlet

5,项目代码包: 点击打开链接

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