采用commons-configuration包实现属性文件读取的工具类

代码如下:

package com.yanek.base;

import org.apache.commons.configuration.CompositeConfiguration;
import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;

public class PropManager {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		String jdbcUrl = PropManager.getInstance().getProperty("jdbc.cms.url");
		String jdbcUsername = PropManager.getInstance().getProperty("jdbc.cms.username");
		String jdbcPassword = PropManager.getInstance().getProperty("jdbc.cms.password");
		
		System.out.println("jdbcUrl:"+jdbcUrl);
		System.out.println("jdbcUsername:"+jdbcUsername);
		System.out.println("jdbcPassword:"+jdbcPassword);
		
		System.out.println(PropManager.getInstance());
		System.out.println(PropManager.getInstance());
		
	}
	private PropManager() {
	}
	
	private static PropManager propManager;
	public synchronized static PropManager getInstance() {
		if (propManager == null) {
			propManager = new PropManager();
		}
		return propManager;
	}
	
	public static CompositeConfiguration config = new CompositeConfiguration();
	static {
		try {
			config.addConfiguration(new PropertiesConfiguration("jdbc.properties"));
		} catch (ConfigurationException e) {
			e.printStackTrace();
		}
	}
	
	public String  getProperty(String key)
	{
		return config.getString(key);
	}
	
	

}

测试输出:

jdbcUrl:jdbc:mysql://127.0.0.1:3306/easycms?characterEncoding=UTF8
jdbcUsername:root
jdbcPassword:root
com.yanek.base.PropManager@174cc1f
com.yanek.base.PropManager@174cc1f

使用的包:  commons-configuration-1.6.jar

几点说明:

 1. 采用了单态设计模式,

2.属性文件在classpath目录下.

3. 采用commons-configuration-1.6.jar来读取属性文件

jdbc.properties文件:

jdbc.cms.url=jdbc:mysql://127.0.0.1:3306/easycms?characterEncoding=UTF8
jdbc.cms.username=root
jdbc.cms.password=root