configmanager.java

ktv点歌系统前台收银有开包房

package com.ktv.common;

import org.apache.log4j.Logger;

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

/**
 * @author Cxj
 * 
 */
public class ConfigManager {
	private final static String configFile = "/config.properties";

	private static Logger log = LogUtil.getLogger(ConfigManager.class);

	private static ConfigManager theInstance = null;

	private Properties theProperties = null;

	private ConfigManager() {

		super();
		this.load();
	}

	public static synchronized ConfigManager getInstance() {

		{
			theInstance = new ConfigManager();
		}

		return theInstance;
	}

	private void load() {
		InputStream is = ConfigManager.class.getResourceAsStream(configFile);

		if (is == null) {

			log.error("Can not find the configuration file \"" + configFile
					+ "\" in the JAVA CLASSPATH");
			return;
		}
		theProperties = new Properties();
		try {
			theProperties.load(is);
		} catch (IOException e) {
			log.error("There is IOException occurred when tried to read from name file "
							+ configFile);
		}
	}

	public Properties getConfig() {
		return theProperties;
	}

	public String getConfigValue(String key) {
		if (theProperties == null)
			return null;
		return theProperties.getProperty(key);
	}

	public String getConfigValue(String key, String defaultValue) {
		if (theProperties == null)
			return defaultValue;
		return theProperties.getProperty(key, defaultValue);
	}
}