2008-04-21

MyEclipse+JBoss开发EJB3.0

MyEclipse+JBoss开发EJB3.0

1． 配置环境：下载JBoss我用的是jboss4.0.5GA http://umn.dl.sourceforge.net/sourceforge/jboss/jboss-4.0.5.GA.zip

然后下载jboss-EJB-3.0_RC9_Patch_1我用的是http://nchc.dl.sourceforge.net/sourceforge/jboss/jboss-EJB-3.0_RC9_Patch_1.zip

设置环境变量：JBOSS_HOME=D:\jboss-4.0.5.GA;

下载ant1.7用ant部署jboss-EJB-3.0_RC9_Patch_1

设置ANT_HOME= C:\apache-ant-1.7.0

Path里添加％ANT_HOME％\bin 然后打开jboss-EJB-3.0_RC9_Patch_1

文件夹下的install.html 打开命令行

cd jboss-EJB-3.0_RC9_Patch1-FD

ant -f install.xml -Djboss.server.config=all 这样就部署到jboss下了

接下来就是切换到jboss4.0.5GA\bin目录下运行run –c all 看到这样的信息说明你环境配置成功了

再看看http://localhost:8080/看看是否用jboss的欢迎页面

2．开始我们的第一个ejb工程吧

新建一个WEB工程命名为firstEjb

接着建package 为com.ejb

新建一个接口为HelloWorld 建立方法为sayHello(); 

package com.ejb;

 

public interface HelloWorld {

     public String sayHello(String who);

}

接着新建class HelloWorldBean.java 
package com.ejb;

import javax.ejb.Remote;

import javax.ejb.Stateless;

@Stateless

@Remote({HelloWorld.class})

public class HelloWorldBean implements HelloWorld {

    public String sayHello(String who) {

       // TODO Auto-generated method stub

       return who+",你好，欢迎使用ejb";

    }
}


新建个servlet 为firstEjb.java

部分源码 
public void doGet(HttpServletRequest request, HttpServletResponse response)

                       throws ServletException, IOException {

 

               response.setContentType("text/html,charset=GBK");

               PrintWriter out = response.getWriter();

               out

                               .println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");

               out.println("<HTML>");

               out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");

               out.println("  <BODY>");

               

               Properties props = new Properties();

               props.setProperty("java.naming.factory.initial",

               "org.jnp.interfaces.NamingContextFactory");

               props.setProperty("java.naming.provider.url", "localhost:1099");

               props.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming");

               InitialContext ctx;

               try {

               ctx = new InitialContext(props);

               HelloWorld helloworld = (HelloWorld)

               ctx.lookup("HelloWorldBean/remote");

               out.println(helloworld.sayHello("小树"));

               } catch (NamingException e) {

               out.println(e.getMessage());

               }

               out.println("  </BODY>");

               out.println("</HTML>");

               out.flush();

               out.close();

        }


打成jar包放到D:\jboss-4.0.5.GA\server\all\deploy下

最后就是发布程序了 

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.4" 

    xmlns="http://java.sun.com/xml/ns/j2ee" 

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 

    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

  <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>firstEjb</servlet-name>

    <servlet-class>com.servlet.firstEjb</servlet-class>

  </servlet>

  <servlet-mapping>

    <servlet-name>firstEjb</servlet-name>

    <url-pattern>/firstEjb</url-pattern>

  </servlet-mapping>

  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

</web-app>

在网页中输入http://localhost:8080/ejb/firstEjb你会看到你要的结果
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