salaryinspector.txt

ejb的学习资料

import javax.ejb.*;
import examples.*;
import javax.naming.InitialContext;
import java.lang.reflect.*;
class   SalaryInspector  {
public  static  void  main(String [ ]  args)  {
   try {
      InitialContext ctx = new InitialContext ();
      Object objRef = ctx.lookup ("Salary");
      SalaryHome home =(SalaryHome)
      javax.rmi.PortableRemoteObject.narrow(objRef，SalaryHome.class );
      EJBMetaData  data = home.getEJBMetaData();
//getHomeInterfaceClass()方法用于返回Class对象的引用，还表示Bean的主接口。
//getRemoteInterfaceClass()方法用于返回Class对象的引用，还表示Bean的远程接口。
      Class homeClass = data.getHomeInterfaceClass();
      System.out.println("The home interface is：" + homeClass.getName());
      getClassInfo(homeClass);
      class  remoteClass = data.getRemoteInterfaceClass();
      System.out.println("The remote interface is: "+
                 remoteClass.getName());
      getClassInfo(remoteClass);
      String beanType = " ";
      if (data.isSession()) {
          if(data.isStateleaseSession()) {
              beanType = "Stateless";
          }  
          else {
                beanType = "Stateful";
          }
          else { 
             beanType = "Entity ";
          }
          System.out.println ("The bean is a: " = beanType);
      }  catch (javax.naming.NamingException  ne) {
             System.out.println("Naming  Exception caught: " = ne);
          } catch(java.rmi.RemoteException re) {
                 System.out.println("Remote  Exception  caught: " = re);
               }
   }
    private static void getClassInfo(Class  cls) {
         String name = cls.getName();
         Constructor[]  constructors = cls.getConstructors();
         Fields[]   fields = cls.getFields();
         Method[]  methods = cls.getMethods();
         System.out.println (name+ "has" +constructors.length +
                 "   constructors");
         for (int i<0；i<constructors.length; i++) {
         System.out.println("" + constructors[i]);
           }
         System.out.println(name +"has"+fields.length
                                      +"fields");
         for ( int i<0；i<fields.length;i++) {
              System.out.println(""+ fields[I]);
         }
         System.out.println(name +"has" +methods.length
                                     + "methods");
         for (int i=0； i<methods.length; i++) {
             System.out.println("" + methods[i]);
          }
    }
}