lookup.java

J2EE 1.4程序设计教程图书配套的源代码

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.util.Hashtable;
class Lookup {
    public static void main(String[] args) {
	// Check that user has supplied name of file to lookup
	if (args.length != 1) {
	    System.err.println("usage: java Lookup <filename>");
	    System.exit(-1);
	}
	String name = args[0];
	// Identify service provider to use
	Hashtable env = new Hashtable(11);
	env.put(Context.INITIAL_CONTEXT_FACTORY， 
	    "com.sun.jndi.fscontext.RefFSContextFactory");
	try {
	    // Create the initial context
	    Context ctx = new InitialContext(env);
	    // Look up an object
	    Object obj = ctx.lookup(name);
	    // Print it out
	    System.out.println(name + " is bound to: " + obj);
	    
	    // Close the context when we're done
	    ctx.close();
	} catch (NamingException e) {
	    System.err.println("Problem looking up " + name + ": " + e);
	}
    }
}