Spring+struts+ejb(一）

开发ejb：

1、创建一个ejb project

2、编写代码（entity bean ； session bean）

①entity bean

@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：

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

@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）:

<?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

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

<?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：

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：

<?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

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