一个工具类

用来记录日志的：

class LogWriter {
  // 可以写作配置：true写文件; false输出控制台
  private static boolean fileLog = true;
  private static String logFileName = "/home/yzx/yzx/elong/sysout.log";

  public static void log(String info) throws IOException {
    OutputStream out = getOutputStream();
    out.write(info.getBytes("utf-8"));
  }

  public static OutputStream getOutputStream() throws IOException {
    if (fileLog) {
      File file = new File(logFileName);
      if (!file.exists())
        file.createNewFile();
      return new FileOutputStream(file);
    } else {
      return System.out;
    }
  }
}

记录日志的工具类LogWriter