Spring+struts+ejb(一）

 

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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    <?xml version="1.0" encoding="UTF-8"?> 
     
    <beans xmlns="http://www.springframework.org/schema/beans" 
             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"> 
     
        <bean id="userManager" class="org.springframework.jndi.JndiObjectFactoryBean"> 
            <property name="jndiName" value="userManager/remote"></property> 
        </bean>     
    </beans> 

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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    <?xml version="1.0" encoding="UTF-8"?> 
    <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 
      <servlet> 
        <servlet-name>action</servlet-name> 
        <servlet-class>org.apache.struts.action.ActionServlet</servlet-class> 
        <init-param> 
          <param-name>config</param-name> 
          <param-value>/WEB-INF/struts-config.xml</param-value> 
        </init-param> 
        <init-param> 
          <param-name>debug</param-name> 
          <param-value>3</param-value> 
        </init-param> 
        <init-param> 
          <param-name>detail</param-name> 
          <param-value>3</param-value> 
        </init-param> 
        <load-on-startup>0</load-on-startup> 
      </servlet> 
      <servlet-mapping> 
        <servlet-name>action</servlet-name> 
        <url-pattern>*.do</url-pattern> 
      </servlet-mapping> 
      <welcome-file-list> 
        <welcome-file>index.jsp</welcome-file> 
      </welcome-file-list> 
    </web-app> 

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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    <?xml version="1.0" encoding="UTF-8"?> 
    <!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"> 
     
    <struts-config> 
      <action-mappings > 
        <action  
            path="/ejbAction"  
            type="com.dcy.ejb.struts.EJBAction"> 
          <forward name="success" path="/success.jsp" /> 
        </action> 
      </action-mappings> 
      <message-resources parameter="com.dcy.ejb.struts.ApplicationResources" /> 
    </struts-config> 

Jsp页面
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    <body> 
        This is my JSP page. <br> 
        <a href="ejbAction.do">测试struts调用</a> 
      </body>