sincalculateserver.java

java EJB 编程源代码。

import java.rmi.*;
import java.rmi.server.*;

public class sinCalculateServer extends UnicastRemoteObject implements sinCalculateInterface
  {
   String objname = null;      

   public sinCalculateServer(String se) throws RemoteException
     {
      /* 这是一个构造器，用于构造Server端的程序对象 */
      super();  //引用超类的构造函数
      objname = se;
     }

   public double CalculateSin(int x_degree)
     {
      /* 具体的计算方法（函数），用于完成Client提交的计算请求 */
      double x_value = 0;
      double y = 0;

      x_value = x_degree * (3.14 / 180);    //进行弧度制转换
      y = Math.sin(x_value);
      System.out.println("y(" + x_value + ")="+ y);
      return y;
     }

   public static void main(String[] args)
     {
      String RemoteSerHost = null;

      /* 创建RMI安全管理器实例 */
      RMISecurityManager rsm = new RMISecurityManager();
      System.setSecurityManager(rsm);

      try
        {
         /* 创建远程对象实例 */
         RemoteSerHost = "//127.0.0.1/BlueICE";
         sinCalculateServer scs = new sinCalculateServer("BlueICE");
         Naming.rebind(RemoteSerHost,scs);
         System.out.println("\nsinCalculateServer对象已被注册");
        }
      catch(Exception e)
        {
         System.out.println("Server端程序抛出例外：" + e.toString());
        }
     }
  }