package com.hafiz.www.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.util.Properties;
/**
 * Desc:properties文件獲取工具類
 * Created by hafiz.zhang on 2016/9/15.
 */
public class PropertyUtil {
  private static final Logger logger = LoggerFactory.getLogger(PropertyUtil.class);
  private static Properties props;
  static{
    loadProps();
  }
  synchronized static private void loadProps(){
    logger.info("開始加載properties文件內容.......");
    props = new Properties();
    InputStream in = null;
    try {
　　　　　　　<!--第一種，通過類加載器進行獲取properties文件流-->
      in = PropertyUtil.class.getClassLoader().getResourceAsStream("jdbc.properties");
　　　　　　 <!--第二種，通過類進行獲取properties文件流-->
      //in = PropertyUtil.class.getResourceAsStream("/jdbc.properties");
      props.load(in);
    } catch (FileNotFoundException e) {
      logger.error("jdbc.properties文件未找到");
    } catch (IOException e) {
      logger.error("出現IOException");
    } finally {
      try {
        if(null != in) {
          in.close();
        }
      } catch (IOException e) {
        logger.error("jdbc.properties文件流關閉出現異常");
      }
    }
    logger.info("加載properties文件內容完成...........");
    logger.info("properties文件內容：" + props);
  }
  public static String getProperty(String key){
    if(null == props) {
      loadProps();
    }
    return props.getProperty(key);
  }
  public static String getProperty(String key, String defaultValue) {
    if(null == props) {
      loadProps();
    }
    return props.getProperty(key, defaultValue);
  }
}