weblogic开发EJB

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各个容器开发EJB不太一样，这里使用的是Weblogic8.1和EJB2.0进行演示的。

1 下载java1.4的EE包

2 设置环境变量

3 设置Weblogic的配置

4 添加weblogic的javaee.jar和weblogic.jar到CLASSPATH 在bea/weblogic81/server/lib中

下面的演示使用手工，不使用Eclipse

1 编写Bean

/** * */package com;import java.rmi.RemoteException;import javax.ejb.SessionBean;import javax.ejb.SessionContext;public class HelloWorldBean implements SessionBean {public void setSessionContext(SessionContext ctx) {System.out.println("set session context");}public void ejbCreate() {System.out.println("ejb create");}public void ejbRemove() {System.out.println("ejb remove");}public void ejbActivate() {System.out.println("ejb activate");}public void ejbPassivate() {System.out.println("ejb passivate");}public String sayHello(String name) throws RemoteException {return "Hello :" + name;}}

2 实现接口

/** * */package com;import java.rmi.RemoteException; import javax.ejb.CreateException; import javax.ejb.EJBHome; public interface HelloWorldHome extends EJBHome { HelloWorldRemote create() throws RemoteException, CreateException; }

3 创建部署描述符ejb-jar.xml 在META-INF文件夹下

<?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><display-name>TestEjb</display-name> <enterprise-beans> <session> <display-name>helloEJB</display-name> <ejb-name>helloEJB</ejb-name> <home>com.HelloWorldHome</home> <remote>com.HelloWorldRemote</remote> <ejb-class>com.HelloWorldBean</ejb-class> <session-type>Stateless</session-type> <transaction-type>Bean</transaction-type> </session> </enterprise-beans> </ejb-jar>

4 创建weblogic的部署weblogic-ejb-jar.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE weblogic-ejb-jar PUBLIC "-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN" "http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd"><weblogic-ejb-jar> <description></description> <weblogic-enterprise-bean> <ejb-name>helloEJB</ejb-name> <jndi-name>ejb/hello</jndi-name> </weblogic-enterprise-bean></weblogic-ejb-jar>

5 编译上面的文件

javac

HelloWorldBean.class

HelloWorldRemote.class

HelloWorldHome.class

6 使用jar进行打包

jar -cvf TestEjb.jar *.*

7 使用weblogic的命令

java weblogic.appc TestEjb.jar

客户端访问可以去除HelloWorldBean.class

8 部署

8.1 启动weblogic服务，使用console进行部署。

8.2 或直接复制到应用程序目录，比如C:/bea/user_projects/domains/mydomain/applications也可以。

9 编写客户端

import java.util.Hashtable;import javax.naming.Context;import javax.naming.InitialContext;import javax.rmi.PortableRemoteObject;import com.HelloWorldHome;import com.HelloWorldRemote;/* * Created on 2010-11-12 * * To change the template for this generated file go to * Window>Preferences>Java>Code Generation>Code and Comments *//** * @author Administrator * * To change the template for this generated type comment go to * Window>Preferences>Java>Code Generation>Code and Comments */public class TestEjb {public static void main(String[] args) {try {System.out.println("begin ctx");//得到与远程通信的连接Hashtable cs = new Hashtable();cs.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");cs.put(Context.PROVIDER_URL, "t3://rollin:7001");Context ctx = new InitialContext(cs);System.out.println("----------------------");HelloWorldHome objRef = (HelloWorldHome) ctx.lookup("ejb/hello");HelloWorldHome home =(HelloWorldHome) PortableRemoteObject.narrow(objRef,HelloWorldHome.class);HelloWorldRemote remote = home.create();System.out.println(remote.sayHello("mrl"));} catch (Exception ex) {ex.printStackTrace();System.out.println(ex.toString());}}}

10 javac Test.java

11 java Test

C:/Documents and Settings/Administrator/workspace/TestEjb/ejbModule>java TestEjbbegin ctx----------------------Hello :mrl

<2010-11-12 下午14时54分11秒 CST> <Notice> <WebLogicServer> <BEA-000355> <Thread "ListenThread.Default" listening on port 7001, ip address *.*>set session contextejb create

12 在容器内访问：该web的lib有EJBClient.jar(TestEjb.jar)文件即可。

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>Insert title here</title></head><body><%@ page import="java.sql.*"%> <%@ page import="java.util.*"%> <%@ page import="javax.naming.*"%> <%@ page import="javax.rmi.PortableRemoteObject"%> <%@ page import="com.HelloWorldHome"%> <%@ page import="com.HelloWorldRemote"%> <% String result = ""; try {System.out.println("begin context"); //得到与远程通信的连接Hashtable cs = new Hashtable();cs.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");cs.put(Context.PROVIDER_URL, "t3://rollin:7001");Context ctx = new InitialContext(cs);System.out.println("----------------------");HelloWorldHome objRef = (HelloWorldHome) ctx.lookup("ejb/hello");HelloWorldHome home =(HelloWorldHome) PortableRemoteObject.narrow(objRef,HelloWorldHome.class);HelloWorldRemote remote = home.create();result = remote.sayHello("mrl2");} catch (Exception ex) {ex.printStackTrace();System.out.println(ex.toString());} finally {out.println("end");}%><%=result%></body></html>

访问该页面2次的情况

end Hello :mrl2

begin context----------------------begin context----------------------

容器内其实容器可以发现EJB对象

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>Insert title here</title></head><body><%@ page import="java.sql.*"%> <%@ page import="java.util.*"%> <%@ page import="javax.naming.*"%> <%@ page import="javax.rmi.PortableRemoteObject"%> <%@ page import="com.HelloWorldHome"%> <%@ page import="com.HelloWorldRemote"%> <% String result = ""; try {System.out.println("begin context ag"); //得到与远程通信的连接Context ctx = new InitialContext();System.out.println("----------------------");HelloWorldHome objRef = (HelloWorldHome) ctx.lookup("ejb/hello");HelloWorldHome home =(HelloWorldHome) PortableRemoteObject.narrow(objRef,HelloWorldHome.class);HelloWorldRemote remote = home.create();result = remote.sayHello("mrl3");} catch (Exception ex) {ex.printStackTrace();System.out.println(ex.toString());} finally {out.println("end");}%><%=result%></body></html>

后台

begin context----------------------set session contextejb createbegin context ag----------------------