在CompanyRemote接口中定义了两个方法,分别返回一个字符串和一个Employee类型的数组。
第2步:编写Employee类
public class Employee implements java.io.Serializable
{
private String name;
private String job;
private int age;
public String getName()
{
return name;
}
public void setName(String name)
{
this .name = name;
}
public String getJob()
{
return job;
}
public void setJob(String job)
{
this .job = job;
}
public int getAge()
{
return age;
}
public void setAge( int age)
{
this .age = age;
}
}
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
第3步:编写Stateless Session Bean
import java.util.List;
import java.util.ArrayList;
import javax.ejb.Remote;
import javax.ejb.Stateless;
@Stateless(mappedName = " Company " )
public class Company implements CompanyRemote
{
public Employee[] getEmployees()
{
Employee[] employees = new Employee[ 2 ];
employees[ 0 ] = new Employee();
employees[ 0 ].setName( " superman " );
employees[ 0 ].setJob( " CEO " );
employees[ 0 ].setAge( 1234 );
employees[ 1 ] = new Employee();
employees[ 1 ].setName( " 擎天柱 " );
employees[ 1 ].setJob( " CTO " );
employees[ 1 ].setAge( 4321 );
return employees;
}
public String getName()
{
return " 地球软件有限公司 " ;
}
}
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
这个Session Bean使用了@Stateless注释指定了该Session Bean是无状态的,并使用了mappedName属性指定该Session Bean的JNDI名的前一部分,如果mappedName属性的值是Company,则该Session Bean的JNDI名是Company#com.earth.CompanyRemote。
第4步:编译.java文件,并生成.jar文件
将上面三个.java文件放到同一个目录下,并使用如下的命令生成相应的.class文件:
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
注意:在编译.java文件时要将在classpath环境变量或javac的-classpath参数中指定weblogic.jar文件,假设WebLogic10安装在了C盘的bea目录,则weblogic.jar文件位于C:"bea"wlserver_10.3"server"lib目录中,本例使用了weblogic10.3。
在生成.class文件后,使用如下的命令生成company.jar文件:
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
第5步:发布EJB
发布EJB的方法很多,然而最简单的是直接将company.jar文件复制到如下的目录:
C:/bea/user_projects/domains/base_domain_new/autodeploy
其中base_domain_new是域名,读者也可将company.jar文件复制到其他域的autodeploy目录中。
启动Weblogic,该EJB自动发布。读者可以使用如下的URL来查看在当前Weblogic服务器中注册的JNDI:
http://localhost:7001/console/consolejndi.portal?_nfpb=true&_pageLabel=JNDIHomePage&server=AdminServer
其中AdminServer为Weblogic的服务名,可能在读者的机器上是其他的服务名,请使用如下的URL进行Weblogic Console进行查看:
http://localhost:7001/console
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
安装EJB后,本机注册的JNDI如下图所示。

第6 步:编写客户端程序
调用EJB的客户端代码如下:
import javax.naming.Context;
import javax.naming.InitialContext;
import com.earth. * ;
public class TestCompany
{
public static void main(String[] args) throws Exception
{
Properties props = new Properties();
props.setProperty(Context.INITIAL_CONTEXT_FACTORY,
" weblogic.jndi.WLInitialContextFactory " );
props.setProperty(Context.PROVIDER_URL, " t3://192.168.17.127:7001 " );
InitialContext ctx = new InitialContext(props);
CompanyRemote companyRemote = (CompanyRemote) ctx
.lookup( " Company#com.earth.CompanyRemote " );
System.out.println(companyRemote.getName());
Employee[] employees = companyRemote.getEmployees();
for (Employee employee : employees)
{
System.out.println( " name: " + employee.getName());
System.out.println( " job: " + employee.getJob());
System.out.println( " age: " + employee.getAge());
System.out.println( " ------------------------- " );
}
}
}
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
使用如下的命令编译TestCompany.java:
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
注意:TestCompany.java与company.jar文件需要在同一目录下。
由于调用客户端的代码并不一定在安装WebLogic的机器上运行,因此,在将TestCompany.class和company.jar(发布到客户端的这个jar文件只需要Employee.class和CompanyRemote.class文件即可,Company.class可以从该jar文件中删除)发布到客户端时还需要带一些WebLogic自身的jar文件。虽然Weblogic中有一个wlclient.jar文件,但光有这个文件还不够,不了方便提取客户端需要的jar文件,Weblogic提供了一个jar包,通过该包,可以将客户端需要的所有.class文件打成一个jar包。
这个jar文件是C:/bea/modules/com.bea.core.jarbuilder_1.2.0.0.jar,可通过如下的命令行来生成客户端需要的jar包:
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} --> 注意:上面的命令必须在C:/bea/wlserver_10.3/server/lib目录中执行。
在执行上面的命令后,将在E:/bea/wlserver_10.3/server/lib目录生成一个wlfullclient.jar文件,将该文件与TestCompany.class、company.jar一同复制到客户端的机器上即可。并通过如下的命令来执行TestCompany.class:
<!-- /* Font Definitions */ @font-face {font-family:宋体; panose-1:2 1 6 0 3 1 1 1 1 1;} @font-face {font-family:""@宋体"; panose-1:2 1 6 0 3 1 1 1 1 1;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; text-align:justify; text-justify:inter-ideograph; font-size:10.5pt; font-family:"Times New Roman";} /* Page Definitions */ @page {} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 90.0pt 72.0pt 90.0pt;} div.Section1 {page:Section1;} -->
执行上面的命令后的输出结果如下面两个图所示:

Windows下的执行结果

Linux下的执行结果