finderds.java

来自「Eclips+tomcat基于struts开发的一个员工系统的小例子」· Java 代码 · 共 25 行

package com.zhang.common;

import java.util.HashMap;

import javax.naming.InitialContext;
import javax.naming.NamingException;

public final class FinderDS {

	private static HashMap hashMap = new HashMap();

	private FinderDS() {
	}

	public static Object find(String dsName) throws NamingException {
		Object obj = hashMap.get(dsName);
		if (obj == null) {
			InitialContext ctx = new InitialContext();
			obj = ctx.lookup(dsName);
			hashMap.put(dsName, obj);
		}

		return obj;
	}
}