EJB 3.0提供了将会话EJB公开为Web服务的选项. @WebService注释用于将类标记为Web服务端点，@ WebMethod用于将方法作为Web方法公开给客户端.
@Stateless
@WebService(serviceName="LibraryService")
public class LibraryPersistentBean implements LibraryPersistentBeanRemote {
...
@WebMethod(operationName="getBooks")
public List<Book> getBooks() {
return entityManager.createQuery("From Books").getResultList();
}
...
}让我们创建一个测试EJB应用程序来测试EJB 3.0中的blob/clob支持.
| Step | 描述 |
|---|---|
| 1 | 在EJB-Create Application章节中解释，在com.it1352.entity包下创建一个名为EjbComponent的项目.请使用在EJB - Persistence章节中创建的项目本章来理解EJB概念中的clob/blob对象. |
| 2 | 在com.it1352.stateless包下创建LibraryPersistentBean.java.使用EJB - Persistence章节作为参考.保持其余文件不变. |
| 3 | 清理并构建应用程序以确保业务逻辑按照要求运行. |
| 4 | 最后，在JBoss Application Server上以jar文件的形式部署应用程序.如果JBoss应用服务器尚未启动，它将自动启动. |
package com.it1352.stateless;
import com.it1352.entity.Book;
import java.util.List;
import javax.ejb.Stateless;
import javax.jws.WebMethod;
import javax.jws.WebService;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
@WebService(serviceName="LibraryService")
public class LibraryPersistentBean implements LibraryPersistentBeanRemote {
public LibraryPersistentBean() {
}
@PersistenceContext(unitName="EjbComponentPU")
private EntityManager entityManager;
public void addBook(Book book) {
entityManager.persist(book);
}
@WebMethod(operationName="getBooks")
public List <Book> getBooks() {
return entityManager.createQuery("From Book").getResultList();
}
}10:51:37,271 INFO [EJBContainer] STARTED EJB: com.IT屋.stateless.LibraryPersistentBean ejbName: LibraryPersistentBean 10:51:37,287 INFO [JndiSessionRegistrarBase] Binding the following Entries in Global JNDI: LibraryPersistentBean/remote - EJB3.x Default Remote Business Interface LibraryPersistentBean/remote-com.IT屋.stateless.LibraryPersistentBeanRemote - EJB3.x Remote Business Interface 10:51:37,349 INFO [EJBContainer] STARTED EJB: com.tuturialspoint.messagebean.LibraryMessageBean ejbName: BookMessageHandler 10:51:37,443 INFO [DefaultEndpointRegistry] register: jboss.ws:context=EjbComponent,endpoint=LibraryPersistentBean 10:51:38,191 INFO [WSDLFilePublisher] WSDL published to: file:/D:/Jboss-5.0.1/server/default/data/wsdl/EjbComponent.jar/ LibraryService3853081455302946642.wsdl
在NetBeans IDE中，选择，文件>新项目> .在类别下选择项目类型， Java ，项目类型为 Java应用程序.点击下一步> 按钮.输入项目名称和位置.点击完成> 按钮.我们选择了名称作为EJBWebServiceClient.
在Project explorer窗口中右键单击项目名称.选择新建> WebService客户端.
添加EJB组件使用编译选项卡中的添加项目按钮在WSDL和客户端位置下创建的项目的LibraryPersistentBean.
单击"完成"按钮.验证项目资源管理器中的以下结构.
package ejbwebserviceclient;
public class EJBWebServiceClient {
public static void main(String[] args) {
}
}选择Web Service getBooks web方法，如下图所示，并将其拖到EJBWebServiceClient的代码窗口.
您将看到类似于下图所示的输出.
更新EJBWebServiceClient代码以使用此方法.
package ejbwebserviceclient;
public class EJBWebServiceClient {
public static void main(String[] args) {
for(com.it1352.stateless.Book book:getBooks()) {
System.out.println(book.getName());
}
}
private static java.util.List
<com.it1352.stateless.Book> getBooks() {
com.it1352.stateless.LibraryService service =
new com.it1352.stateless.LibraryService();
com.it1352.stateless.LibraryPersistentBean port =
service.getLibraryPersistentBeanPort();
return port.getBooks();
}
}右键单击Project中的项目名称资源管理器窗口.选择运行. Netbeans将构建客户端并运行它.验证以下输出.
ant -f D:\\SVN\\EJBWebServiceClient run init: Deleting: D:\SVN\EJBWebServiceClient\build\built-jar.properties deps-jar: Updating property file: D:\SVN\EJBWebServiceClient\build\built-jar.properties wsimport-init: wsimport-client-LibraryPersistentBean: files are up to date classLoader = java.net.URLClassLoader@4ce46c SharedSecrets.getJavaNetAccess()=java.net.URLClassLoader$7@182cdac wsimport-client-generate: Compiling 1 source file to D:\SVN\EJBWebServiceClient\build\classes compile: run: learn java Learn Spring learn JSF Learn HTML Learn JBoss Learn EJB Learn Hibernate Learn IBatis Times Now learn html5 Learn images Learn Testing Forbes test1 BUILD SUCCESSFUL (total time: 1 second)
