发ejb：

1、创建一个ejb project

2、编写代码（entity bean ； session bean）

①entity bean
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    @Entity 
    public class User implements Serializable { 
        @Id 
        @GeneratedValue 
        private int id; 
        private String username; 
        private String password;     
        //getter setter方法 
    } 

②session bean

接口：
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    public interface UserManager { 
     
        public void addUser(User user); 
        public void deleteUser(int id); 
    } 
    public interface UserManagerLocal { 
     
        public void addUser(User user); 
        public void deleteUser(int id); 
    } 

Bean
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    @Stateless(name="userManager") 
    @Remote({UserManager.class}) 
    @Local({UserManagerLocal.class}) 
    public class UserManagerBean implements UserManager, UserManagerLocal { 
     
        @PersistenceContext(unitName="testsse") 
        private EntityManager em; 
         
        public void addUser(User user) { 
            em.persist(user); 
        } 
     
        public void deleteUser(int id) { 
            User user = em.find(User.class, id); 
            em.remove(user); 
        }    
    } 

一、ejb与spring集成

1、ejb集成spring：spring管理jndi的查找

  ①创建一个java project

  ②引入spring. jar（一个）

  ③编写spring配置文件

applicationContext.xml（放到src目录下）:
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                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
             xmlns:aop="http://www.springframework.org/schema/aop" 
             xmlns:tx="http://www.springframework.org/schema/tx" 
             xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd 
               http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd 
               http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"> 
     
         
             
             
     

注意：如果ejb打包成为ear的话，那么property name=“jndiName”的value要加上ear包的名称，如test/userManager/remote。如果是local，则把remote换成local。

  2、测试代码
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    public class UserManagerTest { 
     
        private static BeanFactory factory = new ClassPathXmlApplicationContext("applicationContext.xml"); 
         
        @Test 
        public void testAddUser() { 
            UserManager userManager = (UserManager)factory.getBean("userManager"); 
            User user = new User(); 
            user.setPassword("password"); 
            user.setUsername("username"); 
            userManager.addUser(user); 
        }                                                                                                            
    } 

二、ejb与struts集成

1、ejb集成struts：只是加入了struts，并未对ejb产生影响。

①建立web project

②引入struts相关jar包（struts1.0）（放到web-inf下的lib文件夹中）

③编写web.xml配置文件
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        action 
        org.apache.struts.action.ActionServlet 
         
          config 
          /WEB-INF/struts-config.xml 
         
         
          debug 
          3 
         
         
          detail 
          3 
         
        0 
       
       
        action 
        *.do 
       
       
        index.jsp 
       
     

2、测试代码

编写strutsaction：

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    public class EJBAction extends Action { 
      
       @Override 
       public ActionForward execute(ActionMapping mapping, ActionFormform, 
            HttpServletRequest request, HttpServletResponse response) 
            throws Exception { 
          InitialContext ict = new InitialContext(); 
    //注意：因为要用到UserManagerLocal这个接口，所以，要引入开发的ejb发布成的jar包 
          UserManagerLocal userManager = (UserManagerLocal)ict.lookup("userManager/local"); 
          UserTest user = new UserTest(); 
          user.setUsername("username=zhangsan"); 
          user.setPassword("password=mima"); 
          userManager.addUser(user); 
      
          request.setAttribute("user", user); 
          return mapping.findForward("success"); 
       }  
    } 

struts配置文件：
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                    path="/ejbAction"  
            type="com.dcy.ejb.struts.EJBAction"> 
           
         
       
       
     

Jsp页面
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        This is my JSP page.
 
        测试struts调用