我的第一个Servlet程序

Servlet用来开发动态的Web程序，下面就把我使用MyEclipse创建第一个Servlet记录下来

一、首先安装MyEclipse.10.0，下载地址：http://pan.baidu.com/s/1kTBKJzT

通过下面链接下载破解方法：http://download.csdn.net/detail/deng0zhaotai/6813933

二、下载和配置Tomcat服务器

关于Tomcat的下载可以参考：/article/1821841.html

在Eclipse上配置Tomcat服务器

1.Window->Preferences



2.选择你需要配置的服务器



3.



4.点击服务器图标的下三角，就可以看到刚刚配置的Tomcat 7.x服务器



5.点击开始会打印以下信息，说明配置成功

2014-1-6 12:59:51 org.apache.catalina.core.AprLifecycleListener init
信息: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: D:\Program Files\MyEclipse\Common\binary\com.sun.java.jdk.win32.x86_1.6.0.013\bin;F:\Java 开发库\Tomcat\apache-tomcat-7.0.42\bin
2014-1-6 13:00:01 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["http-bio-8080"]
2014-1-6 13:00:01 org.apache.coyote.AbstractProtocol init
信息: Initializing ProtocolHandler ["ajp-bio-8009"]
2014-1-6 13:00:01 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 10999 ms
2014-1-6 13:00:01 org.apache.catalina.core.StandardService startInternal
信息: Starting service Catalina
2014-1-6 13:00:01 org.apache.catalina.core.StandardEngine startInternal
信息: Starting Servlet Engine: Apache Tomcat/7.0.42
2014-1-6 13:00:01 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory F:\Java 开发库\Tomcat\apache-tomcat-7.0.42\webapps\docs
2014-1-6 13:00:02 org.apache.catalina.util.SessionIdGenerator createSecureRandom
信息: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [109] milliseconds.
2014-1-6 13:00:02 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory F:\Java 开发库\Tomcat\apache-tomcat-7.0.42\webapps\examples
2014-1-6 13:00:02 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2014-1-6 13:00:02 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2014-1-6 13:00:03 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: attributeAdded('org.apache.jasper.compiler.TldLocationsCache', 'org.apache.jasper.compiler.TldLocationsCache@143c423')
2014-1-6 13:00:03 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory F:\Java 开发库\Tomcat\apache-tomcat-7.0.42\webapps\host-manager
2014-1-6 13:00:03 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory F:\Java 开发库\Tomcat\apache-tomcat-7.0.42\webapps\manager
2014-1-6 13:00:03 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory F:\Java 开发库\Tomcat\apache-tomcat-7.0.42\webapps\ROOT
2014-1-6 13:00:03 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-bio-8080"]
2014-1-6 13:00:03 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-bio-8009"]
2014-1-6 13:00:03 org.apache.catalina.startup.Catalina start
信息: Server startup in 1784 ms

6.测试是否配置成功，在IE上输入：http://localhost:8080/ ，如果出现以下界面说明配置成功了。



配置能一次成功是因为我之前装过ADT，把Java环境变量都配置好了，如果配置失败可以看下你的PC是否已经配置Java环境变量，如果不清楚百度一下就知道了。

三、新建Servlet工程

1.新建一个Web工程







2.新建Servlet类







3.在网页上输出一句话

First.java

package com.dmt.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 First extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.getWriter().write("Hello This is my first Servlet");
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

}

web.xml

<?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">   <display-name></display-name>
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>First</servlet-name>
    <servlet-class>com.dmt.servlet.First</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>First</servlet-name>
    <url-pattern>/servlet/First</url-pattern>
  </servlet-mapping>	
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

3.部署服务器







4.测试

在IE上输入：http://localhost:8080/FirstServlet/servlet/First

出现如下画面，输出了在Servlet上写的代码



Demo下载

点击打开链接