package com.struts2.framework.util;

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

/**
 * @author Jecky Luo
 * 
 * Layout類用來讀取layout屬性表的內(nèi)容
 *
 */
public class LayoutConfig {

	private static LayoutConfig config = new LayoutConfig(); //存放LayoutConfig單一實(shí)例

	private static Properties layoutProps = new Properties();

	/**
	 * 構(gòu)造方法設(shè)置為private類型，保證Layout類只有一個(gè)實(shí)例被創(chuàng)建
	 */
	public LayoutConfig() {
		//從屬性文件讀取配置信息
		try {
			layoutProps.load(
				LayoutConfig.class.getClassLoader().getResourceAsStream(
					"layout.properties"));
		} catch (IOException ioe) {
			System.out.println("LayoutConfig file load error: " + ioe.getMessage());
		}
	}

	public static LayoutConfig getInstance() {
		return config;
	}
	
	/**
	 * 根據(jù)key返回屬性值
	 */
	public String getProperty (String key) {
		return layoutProps.getProperty(key);
	}
}