EJB学习之二第一个Ejb程序

SessionBean

    1.新建Ejb Project

 

    2.编写接口

        package com.tgb.ejb;

        

         publicinterface FirstEjb{

                   StringsayHello(String name);

         }

     3.编写实现类

        package com.tgb.ejb;

 

         publicclass FirstEjbBean implements FirstEjb{

                  

                   publicString sayHello(String name){

                            return“Hello,” + name;

                   }

         }

     4.利用注解配置EJB

       

         //此处可以加入name属性，规定这个bean的名称

         @Stateless

         @Remote

         publicclass FirstEjbBean implements FirstEjb{

                  

                   publicString sayHello(String name){

                            return“Hello,” + name;

                   }

         }

     5.部署到jboss并运行jboss

     6.将EJB项目的接口打包(客户端只需要EJB接口即可)，并把这个jar包加入到客户端项目的类路径下

     7.将jboss安装目录下的client目录里面所有jar加入到客户端项目中

     8.编写客户端代码

       

         packagecom.tgb.ejb;

         importjavax.naming.InitialContext;

         importjavax.naming.NamingException;

 

         publicclass FirstEjbClient{

                   publicstatic void main(String[] args)  throwsNamingException{

                            InitialContextcontext = new InitialContext();

                            FirstEjbejb = (FirstEjb)context.lookup(“FirstEjbBean/remote”);

                            Strings = ejb.sayHello(“zhangsan”);

                            System.err.println(s);

                   }

         }

     9.在客户端源代码目录下添加jndi.properties

        java.naming.factory.initial =org.jnp.interfaces.NamingContextFactory

         java.naming.factory.url.pkgs= org.jboss.naming:org.jnp.interfaces

java.naming.provider.url= localhost

 

如果本地客户端访问EJB，要修改JBOSS_HOME/SERVER/DEFAULT/DEPLOY/JBOSS-WEB.DEPLOYER/META-INF/JBOSS-SERVICE.XML文件中 ，由FALSE改为TRUE