📄 helloejbservlet.java

📁 java的一系列产品中包括jsme,jmse,j2ee,本文件提供j2ee实现的源代码.
💻 JAVA
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/*
 *
 * Copyright 2002 Author,Zhang Hongzhan. All Rights Reserved.
 * 
 * This software is the proprietary information of Author.  
 * 
 */
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;

import java.math.BigDecimal;
import java.rmi.RemoteException;
import java.util.Properties;

import javax.ejb.CreateException;
import javax.ejb.RemoveException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;

public class HelloEJBServlet  extends HttpServlet{
	
	private static final String JNDI_NAME = "HelloEJB";
	private static final String url  = "t3://localhost:7001";
	
	public void init(ServletConfig config) throws ServletException{
		super.init(config);
		//set self environment variable		
	}
	
	public void service(HttpServletRequest req,HttpServletResponse resp) 
				 throws IOException{
		resp.setContentType("text/html");
		PrintWriter out=resp.getWriter();		
		try{
      // Get an InitialContext
      Properties env = new Properties();
      env.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
      env.put(Context.PROVIDER_URL, url);
      
      Context ctx = new InitialContext(env);      
      Object h=ctx.lookup(JNDI_NAME);
      HelloEJBHome home=(HelloEJBHome)PortableRemoteObject.narrow(h, 
                      HelloEJBHome.class);
      HelloEJBRemote currencyHelloWorld =home.create();
      
      String hello=currencyHelloWorld.HelloWorld();
      
      //print out our Text
		  out.println("<html><head><title>Hello World!</title></head><body>");
      //System.out.println("My EJB said:"+hello);
      out.println("<h1>My EJB said:"+hello+"</h1>");
      BigDecimal param = new BigDecimal ("100.00");
      BigDecimal amount = currencyHelloWorld.dollarToRMB(param);
      //System.out.println("100 dollar = "+amount+" RMB");
      out.println("<h1>100 dollar = "+amount+"RMB</h1>");
      amount = currencyHelloWorld.poundToRMB(param);
      //System.out.println("100 pound = "+amount+" RMB");
      out.println("<h1>100 pound = "+amount+"RMB</h1>");
      System.out.println("</body></html>");
      //System.exit(0);
    }catch(Exception ex) {
      System.err.println("Caught an unexpected exception!");
      ex.printStackTrace();
    }
		
	}
	
	/*private static void log(String s) {
    System.out.println(s);
  }
  public static void main(String[] args) {
    try{
      // Get an InitialContext
      Properties env = new Properties();
      env.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
      env.put(Context.PROVIDER_URL, url);
      
      Context ctx = new InitialContext(env);      
      Object h=ctx.lookup(JNDI_NAME);
      HelloEJBHome home=(HelloEJBHome)PortableRemoteObject.narrow(h, 
                      HelloEJBHome.class);
      HelloEJBRemote currencyHelloWorld =home.create();
      
      String hello=currencyHelloWorld.HelloWorld();
      System.out.println("My EJB said:"+hello);
      
      BigDecimal param = new BigDecimal ("100.00");
      BigDecimal amount = currencyHelloWorld.dollarToRMB(param);
      System.out.println("100 dollar = "+amount+" RMB");
      amount = currencyHelloWorld.poundToRMB(param);
      System.out.println("100 pound = "+amount+" RMB");

      System.exit(0);
    }catch(Exception ex) {
      System.err.println("Caught an unexpected exception!");
      ex.printStackTrace();
    }
 }*/
  
}
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