利用java.util.Properties读取属性文件

package com.ljun.tree.util;


import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;


import org.junit.Test;


/**
 * 
 * @author 梁军
 * @date 2013-9-4
 * @projectName recurrence_tree
 * @className PropertiesUtil.java
 * @description 读取配置文件
 *
 */
public class PropertiesUtil {
    private static InputStream inputStream = PropertiesUtil.class.getClassLoader().
    getResourceAsStream("dataSource.properties");
    private static Properties prop = new Properties();
    static {
        try {
            prop.load(inputStream);
        } catch (IOException e) {
        System.out.println("IOException");
           e.printStackTrace();
        }
    }
    
    public static String getProperty(String key) {
   
        String value = prop.getProperty(key);
        return value;
    }
    @Test
    public void test(){
   
    System.out.println(PropertiesUtil.getProperty("tree.datasource.driverClassName"));
    }
    
}