eclipse-j2ee版编写第一个servlet程序

浏览数：34 / 时间：2015年06月20日

步骤如下:

1. jdk已经下载,配置好了。这个属于java的基础知识,这里我就不介绍了,不了解的,自己找资料。

2.下载一个tomcat,建议到官网下。解压成文件夹。

3.在window->perferences->service->runtime environment如图:

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4.新建一个web项目,特别是选择版本上最好选择2.5，刚开始我选择3.0的版本就无法访问页面。

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5.新建一个servlet文件,内容如下:

package com.course1.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;

/**
 * Servlet implementation class FirstServlet
 */
public class FirstServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	/**
	 * @see HttpServlet#HttpServlet()
	 */
	public FirstServlet() {
		super();
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		out.println("<html><body><h1>欢迎 servlet and jsp!</h1>");
		out.println("</body></html>");
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		this.doGet(request, response);
	}

}

web.xml配置文件如下:

<?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_2_5.xsd"
	id="WebApp_ID" version="2.5">
	
	<servlet>
		<servlet-name>First</servlet-name>
		<servlet-class>com.course1.servlet.FirstServlet</servlet-class>
	</servlet>
	
	<servlet-mapping>
		<servlet-name>First</servlet-name>
		<url-pattern>/FirstServlet</url-pattern>
	</servlet-mapping>
	
</web-app>

6.给项目添加服务器:

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