JAva propertiesプロパティファイル値の読み出し

package com.zte.cbm.bis.business.common;

import java.io.File;
import java.io.FileInputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Properties;

import com.zte.ssb.framework.SSBBus;
import com.zte.ssb.framework.common.log.Log;

/**
 *          
 * 
 * @author 
 * 
 * @Time
 */
public class ConfigurationRead {

	/**
	 *       ,          PFILE
	 */
	private final static String PFILE = "linkOA.properties";

	/**
	 *       
	 */
	private URI uri = null;

	/**
	 *               
	 */
	private long m_lastModifiedTime = 0;

	/**
	 *               
	 */
	private File m_file = null;

	/**
	 *               
	 */
	private Properties m_props = null;

	/**
	 *     
	 */
	private static ConfigurationRead m_instance = new ConfigurationRead();
	
	Log log = SSBBus.getLog(getClass());

	/**
	 *       
	 * 
	 * @throws URISyntaxException
	 */
	private ConfigurationRead() {
		try {
			m_lastModifiedTime = getFile().lastModified();
			if (m_lastModifiedTime == 0) {
				System.err.println(PFILE + "file does not exist!");
			}
			m_props = new Properties();
			m_props.load(new FileInputStream(getFile()));

		} catch (URISyntaxException e) {
			System.err.println(PFILE + "       ");
			log.debug(e.getMessage(),e);
		} catch (Exception e) {
			System.err.println(PFILE + "      ");
			log.debug(e.getMessage(),e);
		}
	}

	/**
	 *   ClassPath      
	 * 
	 * @return File  
	 * @throws URISyntaxException
	 */
	private File getFile() throws URISyntaxException {
		URI fileUri = this.getClass().getClassLoader().getResource(PFILE)
				.toURI();
		m_file = new File(fileUri);
		return m_file;
	}

	/**
	 *       
	 * 
	 * @return   ConfigurationRead     
	 */
	public synchronized static ConfigurationRead getInstance() {
		return m_instance;
	}

	/**
	 *          
	 */
	public String getConfigItem(String name, String defaultVal) {
		long newTime = m_file.lastModified();
		//            
		if (newTime == 0) {
			//        
			if (m_lastModifiedTime == 0) {
				System.err.println(PFILE + " file does not exist!");
			} else {
				System.err.println(PFILE + " file was deleted!!");
			}
			return defaultVal;
		} else if (newTime > m_lastModifiedTime) {
			m_props.clear();
			try {
				m_props.load(new FileInputStream(getFile()));
			} catch (Exception e) {
				System.err.println("        ");
				log.debug(e.getMessage(),e);
			}
		}
		m_lastModifiedTime = newTime;
		String val = m_props.getProperty(name);
		if (val == null) {
			return defaultVal;
		} else {
			return val;
		}
	}

	/**
	 *          
	 * 
	 * @param name
	 *                  
	 * @return      （     ），  （      ）
	 */
	public String getConfigItem(String name) {
		return getConfigItem(name, "");
	}

}