configutil.java

sla性能采集

package com.asiainfo.ainx.slaconf.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Iterator;
import java.util.Properties;

public class ConfigUtil {
	private Properties prop = null;

	private static ConfigUtil singleton = null;

	// 配置文件路径
	private static String strFileName ;
	private static String home;
	static{
		home = System.getProperty("user.home");
		strFileName = home + File.separator + "etc"
			+ File.separator + "report.properties";
	}
	/**
	 * 私有构造函数，不允许其他类用new方法获得实例
	 * 
	 */
	private ConfigUtil() {

	}

	/**
	 * 获得该类的实例，如果静态实例不为空则返回，为空则创建，保证为单例
	 * 
	 * @return
	 */
	public static synchronized ConfigUtil getInstance() {
		if (singleton == null) {
			singleton = new ConfigUtil();
		}
		return singleton;
	}

	/**
	 * 用配置文件为类成员变量prop赋值
	 * 
	 */
	private void loadConfig() {

		if (prop == null)
			prop = new Properties();
		try {
			File filez = new File(strFileName);
			if(filez.exists()){
				FileInputStream input = new FileInputStream(filez);
				prop.load(input);
				input.close();
				changeHomeToRealpath(prop);
			}
			else{
				createDefaultConfigFile();
			}
		} catch (FileNotFoundException fnfe) {
			System.out.println("指定文件未找到");
		} catch (IOException ioe) {
			System.out.println("发生io异常");
		}
	}
	
	private void createDefaultConfigFile(){
		
	}

	/**
	 * 根据传来的key值返回相应的属性值
	 * 
	 * @param key
	 * @return
	 */
	public static String getProperty(String key) {
		if(getInstance().prop == null)
			getInstance().loadConfig();
		return getInstance().prop.getProperty(key);
	}
	
	public static Properties getAllProperty(){
		if(getInstance().prop == null)
			getInstance().loadConfig();
		return getInstance().prop;
	}
	
	/**
	 * 如果配置文件中指定了"{$HOME}"，含义为当前用户的HOME，则替换该路径为绝对路径。
	 */
	private void changeHomeToRealpath(Properties oraProp){
		for (Iterator iter = oraProp.keySet().iterator(); iter.hasNext();) {
			String key = (String) iter.next();			
			oraProp.put(key, replaceHome(oraProp.getProperty(key)));
		}
	}
	
	private String replaceHome(String str){
		String reval = str;
		if (reval.indexOf("{$HOME}") != -1) {
			StringBuffer strbLine = new StringBuffer(reval);
			StringBuffer resultLine = strbLine.replace(
					reval.indexOf("{$HOME}"),
					reval.indexOf("{$HOME}") + 7, home);
			reval = resultLine.toString();
            if (reval.indexOf("\\") != -1) {
            	reval = reval.replace('\\',File.separatorChar);
            }
            if (reval.indexOf("/") != -1) {
            	reval = reval.replace('/',File.separatorChar);
            }
		}
		//如果设置的路径以文件分隔符结尾，则去除该字段。
		reval = reval.trim();
		if(reval.endsWith(File.separator))
			reval = reval.substring(0, reval.length()-2);
		return reval;
	}
	

	public static void main(String[] args) {
		ConfigUtil test = ConfigUtil.getInstance();
		System.out.println(test.getProperty("uploaddir"));
	}
}