文件结构：

 

E:.

│ build.xml

│

└─src

    ├─META-INF

    │      application.xml

    │      ejb-jar.xml

    │      jboss.xml

    │

    ├─powerwind

    │      ClientServlet.java

    │      Hello.java

    │      HelloBean.java

    │      HelloHome.java

    │

    └─WEB-INF

            jboss-web.xml

            web.xml

 

ant文件

build.xml

<? xml version = "1.0" ?>

< project name = "Hello" default = "prepare" basedir = "." >

 

    < property environment = "env" />

    < property name = "src.dir" value = "${basedir}/src" />

    < property name = "jboss.home" value = "${env.JBOSS_HOME}" />

    < property name = "build.dir" value = "${basedir}/build" />

    < property name = "classes.dir" value = "${build.dir}/classes" />

    < property name = "dist.dir" value = "${basedir}/dist" />

 

    < path id = "compile.classpath" >

       < pathelement location = "${classes.dir}" />

       < fileset dir = "${jboss.home}/client" >

           < include name = "jboss-j2ee.jar" />

           < include name = "javax.servlet.jar" />

           < include name = "commons-httpclient.jar" />

       </ fileset >

    </ path >

 

    < target name = "prepare" >

       < mkdir dir = "${classes.dir}" />

       < mkdir dir = "${dist.dir}" />

       < copy todir = "${build.dir}" >

           < fileset dir = "${src.dir}" >

              < include name = "WEB-INF/*.xml" />

              < include name = "META-INF/*.xml" />

           </ fileset >

       </ copy >

    </ target >

 

    < target name = "clean" >

       < delete dir = "${build.dir}" />

       < delete dir = "${dist.dir}" />

    </ target >

 

    < target name = "compile" depends = "prepare" >

       < javac srcdir = "${src.dir}" destdir = "${classes.dir}" >

           < classpath refid = "compile.classpath" />

       </ javac >

    </ target >

 

    < target name = "jar" depends = "compile" >

       < jar destfile = "${dist.dir}/HelloEJB.jar" >

           < fileset dir = "${build.dir}" >

              < exclude name = "META-INF/application.xml" />

              < include name = "META-INF/*.xml" />

           </ fileset >

           < fileset dir = "${classes.dir}" >

              < include name = "**/*.class" />

           </ fileset >

       </ jar >

    </ target >

 

    < target name = "war" depends = "jar" >

       < jar destfile = "${dist.dir}/HelloEJB.war" >

           < fileset dir = "${build.dir}" >

              < include name = "WEB-INF/*.xml" />

           </ fileset >

       </ jar >

    </ target >

 

    < target name = "ear" depends = "war" >

       < jar destfile = "${dist.dir}/HelloEJB.ear" >

           < fileset dir = "${dist.dir}" >

              < include name = "HelloEJB.jar" />

              < include name = "HelloEJB.war" />

           </ fileset >

           < fileset dir = "${build.dir}" >

              < include name = "META-INF/application.xml" />

           </ fileset >

       </ jar >

    </ target >

 

    < target name = "deploy" depends = "ear" >

       < copy file = "${dist.dir}/HelloEJB.ear" overwrite = "true"

           todir = "${jboss.home}/server/default/deploy" />

    </ target >

 

</ project >

 

java源文件

Hello.java

package powerwind;

 

import java.rmi.RemoteException;

import javax.ejb.EJBObject;

 

public interface Hello extends EJBObject {

    public String sayHello() throws RemoteException;

}

 

HelloHome.java

package powerwind;

 

import java.rmi.RemoteException;

import javax.ejb.CreateException;

import javax.ejb.EJBHome;

 

public interface HelloHome extends EJBHome {

    public Hello create() throws RemoteException, CreateException;

}

 

HelloBean.java

package powerwind;

 

import java.rmi.RemoteException;

import javax.ejb.EJBException;

import javax.ejb.SessionBean;

import javax.ejb.SessionContext;

 

public class HelloBean implements SessionBean {

 

    private SessionContext context ;

 

    public void ejbCreate() throws EJBException, RemoteException {

    }

    public void ejbActivate() throws EJBException, RemoteException {

    }

    public void ejbPassivate() throws EJBException, RemoteException {

    }

    public void ejbRemove() throws EJBException, RemoteException {

    }

 

    public void setSessionContext(SessionContext newContext)

           throws EJBException {

       context = newContext;

    }

 

    public String sayHello() throws EJBException {

       return "Hello from ejb" ;

    }

}

 

用于测试的Servlet 

ClientServlet.java

package powerwind;

 

import java.io.IOException;

import java.io.PrintWriter;

 

import javax.naming.InitialContext;

import javax.rmi.PortableRemoteObject;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

 

public class ClientServlet extends HttpServlet {

 

    public void doGet(HttpServletRequest request, HttpServletResponse response)

           throws ServletException, IOException {

 

       response.setContentType( "text/html" );

       PrintWriter out = response.getWriter();

       String message = null ;

       try {

           InitialContext ic = new InitialContext();

           Object obj = ic.lookup( "HelloEJB" );

           HelloHome home = (HelloHome) PortableRemoteObject.narrow(obj,

                  powerwind.HelloHome. class );

           Hello hello = home.create();

           message = hello.sayHello();

       } catch (Exception e) {

           e.printStackTrace();

       }

       out.println(message);

       out.flush();

       out.close();

    }

 

    public void doPost(HttpServletRequest request, HttpServletResponse response)

           throws ServletException, IOException {

       doGet(request, response);

    }

 

}

 

 

配置文件：

ejb-jar.xml

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

<! DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN' 'http://java.sun.com/dtd/ejb-jar_2_0.dtd' >

< ejb-jar >

    < description > HelloEJB,my first ejb program </ description >

    < display-name > HelloEJB </ display-name >

    < enterprise-beans >

       < session >

           < ejb-name > HelloEJB </ ejb-name >

           < home > powerwind.HelloHome </ home >

           < remote > powerwind.Hello </ remote >

           < ejb-class > powerwind.HelloBean </ ejb-class >

           < session-type > Stateless </ session-type >

           < transaction-type > Container </ transaction-type >

       </ session >

    </ enterprise-beans >

</ ejb-jar >

 

jboss-jar

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

< jboss >

    < enterprise-beans >

       < session >

           < ejb-name > HelloEJB </ ejb-name >

           < jndi-name > HelloEJB </ jndi-name >

       </ session >

    </ enterprise-beans >

</ jboss >

 

application.xml

<? xml version = "1.0" ?>

< application >

    < display-name > HelloEJB J2EE Application </ display-name >

    < module >

       < web >

           < web-uri > HelloEJB.war </ web-uri >

           < context-root > /HelloEJB </ context-root >

       </ web >

    </ module >

    < module >

       < ejb > HelloEJB.jar </ ejb >

    </ module >

</ application >

 

jboss-web.xml

<? xml version = "1.0" ?>

< jboss-web >

    < ejb-ref >

       < ejb-ref-name > HelloEJB </ ejb-ref-name >

       < jndi-name > HelloEJB </ jndi-name >

    </ ejb-ref >

</ jboss-web >

 

web.xml

<? 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 >

       < servlet-name > ClientServlet </ servlet-name >

       < servlet-class > powerwind.ClientServlet </ servlet-class >

    </ servlet >

 

    < servlet-mapping >

       < servlet-name > ClientServlet </ servlet-name >

       < url-pattern > /ClientServlet </ url-pattern >

    </ servlet-mapping >

 

    < ejb-ref >

       < ejb-ref-name > HelloEJB </ ejb-ref-name >

       < ejb-ref-type > Session </ ejb-ref-type >

       < home > powerwind.HelloHome </ home >

       < remote > powerwind.Hello </ remote >

    </ ejb-ref >

 

</ web-app >

 

输入 ant –deploy 部署，启动Jboss服务器，在浏览器地址栏输入：

http://localhost:8080/HelloEJB/ClientServlet

然后看到浏览器输出“Hello from ejb”，就是成功了。

Jboss4.x下第一个EJB2.x程序

剑心 2006-12-11 17:48 发表评论