package org.slf4j;public interface Logger {/*** Log a message at the INFO level.** @param msg the message string to be logged*/public void info(String msg);/*** Log a message at the INFO level according to the specified format and argument.** @param format the format string* @param arg    the argument*/public void info(String format, Object arg);/*** Log a message at the INFO level according to the specified format and arguments.** @param format    the format string* @param arguments a list of 3 or more arguments*/public void info(String format, Object... arguments);/*** Log a message at the ERROR level.** @param msg the message string to be logged*/public void error(String msg);public void error(String format, Object arg);public void error(String format, Object... arguments);/*** Log an exception (throwable) at the ERROR level with an accompanying message.** @param msg the message accompanying the exception* @param t   the exception (throwable) to log*/public void error(String msg, Throwable t);
}

try {......}
} catch (IOException e) {LOG.error("#PayCenterHttpTransport,http调用出错！异常信息：{}", e);
}

log.info("融宝请求url：{}，请求报文：{}", url, json);

  /*** Log a message at the ERROR level according to the specified format and arguments.* <p/>* <p>This form avoids superfluous object creation when the logger is disabled for the ERROR level. </p>** @param format the format string* @param arg1   the first argument* @param arg2   the second argument*/public void error(String format, Object arg1, Object arg2);

14:55:25.997 [main] ERROR ddd - 执行请求1出现异常，
java.lang.Exception: testat com.emax.paycenter.common.util.MailUtil.main(MailUtil.java:100) [classes/:na]