EJB 3.0注入(会话BEAN)
时间:2011-01-20
按照管理 来看看 例子 就清楚了
这个是一个实体bean的实现
package com.ly.bean;
import javax.ejb.Remote;
@Remote
public interface Bean1 {
public void sayBean1();
}
package com.ly.bean;
import javax.ejb.Remote;
@Remote
a public interface Bean2 {
public void sayBean2();
}
package com.ly.bean;
import javax.ejb.Remote;
@Remote
public interface Bean3 {
public void sayBean3();
}
package com.ly.impl;
import javax.ejb.Stateless;
import com.ly.bean.Bean1;
import com.ly.bean.Bean2;
@Stateless(name="bean12")
public class Bean1Impl implements Bean1,Bean2 {
public void sayBean1() {
System.out.println("bean1.........");
}
public void sayBean2() {
System.out.println("bean2.........");
}
}
package com.ly.impl;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import com.ly.bean.Bean1;
import com.ly.bean.Bean2;
import com.ly.bean.Bean3;
@Stateless(name="bean3")
public class Bean2Impl implements Bean3 {
@EJB(beanName="bean12")
Bean1 bean1;
Bean2 bean2;
public void sayBean3() {
bean1.sayBean1();
bean2.sayBean2();
System.out.println("bean3.........");
}
@EJB(mappedName="bean12/remote")
public void setBean2(Bean2 bean2) {
this.bean2 = bean2;
}
}
EJB 3.0注入(会话BEAN)(2)
时间:2011-01-20
客户端代码：
import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import com.ly.bean.Bean3;
public class Test {
public static void main(String args[]) throws Exception{
Properties pro = new Properties();
pro.setProperty("java.naming.factory.initial","org.jnp.interfaces.NamingContextFactory");
pro.setProperty("java.naming.provider.url","localhost:1099");
pro.setProperty("java.naming.factory.url.pkgs","org.jboss.naming");
Context context =new InitialContext(pro);
Bean3 bean=(Bean3) context.lookup("bean3/remote");
bean.sayBean3();
}
}
打印结果是：
21:36:51,843 INFO [Server] JBoss (MX MicroKernel) [4.2.2.GA (build: SVNTag=JBoss_4_2_2_GA date=200710221139)] Started in 18s:328ms
21:36:59,921 INFO [STDOUT] bean1.........
21:36:59,937 INFO [STDOUT] bean2.........
21:36:59,937 INFO [STDOUT] bean3.........
注入 可以在 属性上面 通过@EJB注解来标识 也可以注释在setter方法的上方
@EJB（beanName=""）指明的是 bean的指明映射名字
而@EJB（mappedName=""）指明的是 JNDI名字 比如test/remote
注解 只能注入 本地命名服务 ，不能注入 远程服务器对象 |
