Java 自定义日志写入

/**
	 * 将信息写入到日志
	 * @param content
	 * @return
	 * @throws IOException
	 */
	public static boolean writeLog(String className,String ErrorInfo,String ErrorContent){
		String content=info(className, ErrorInfo, ErrorContent);
		File fileName = new File(System.getProperty("user.dir")+"/config/log.log");
		RandomAccessFile mm = null;
		boolean flag = false;
		FileOutputStream o = null;
		try {
			o = new FileOutputStream(fileName,true);
			o.write(content.getBytes("utf-8"));
			o.close();
			flag = true;
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (mm != null) {
				try {
					mm.close();
				} catch (IOException e) {
					e.printStackTrace();
				}

			}
		}
		return flag;
	}  

	/**
	 *
	 * @param className 类名称
	 * @param ErrorInfo 错误信息
	 * @param ErrorContent 错误内容
	 * @return
	 */
	public static String info(String className,String ErrorInfo,String ErrorContent){
		 StringBuffer buffer=new StringBuffer();
		 Date date = new Date();
         SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
         String d = sd.format(date)+"\r\n";
         buffer.append(d);
         buffer.append("错误类名为：").append(className).append("\r\n");
         buffer.append("错误信息为：").append(ErrorInfo).append("\r\n");
         buffer.append("错误内容为：").append(ErrorContent).append("\r\n");
         buffer.append("\r\n");
         return buffer.toString();
	}