public static void main(String[] args) {
      int a = 10;
    try {
      int i = 1/0;
    }
    catch (Exception e) {
      System.out.println("--------------------");
      e.printStackTrace();// 只能输出在控制台当中，日志文件看不到
      System.out.println("--------------------");
      log.error(e.getMessage());// 只能输出简短的错误信息，不便于排错
      System.out.println("--------------------");
      log.error(e.getStackTrace().toString());// 不能输出错误信息
      System.out.println("--------------------");
      log.error("需要在错误日志 error 之上打锚点，报错了，a-{}",a);
      //用这个去打印日志，完整的日志信息会被打印在日志之中，相当于 e.printStackTrace();
      log.error("test fail-",e);// 可以在日志中输出完整的错误信息，""里要写内容,不能在此处去打错误锚点（不能使用log.error("test fail-{},{}",a,e)）无法打出全部日志
      System.out.println("--------------------");
      log.error("test fail-{},{}",a,e);//无法打出全部日志
      System.out.println("--------------------");
      log.error(e.toString());// 只能输出简短的错误信息，不便于排错
    }
  }

--------------------
java.lang.ArithmeticException: / by zero
    at com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl.main(OrderBasicServiceImpl.java:2056)
main  2019.11.01 at 10:50:51.331 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main():2062 - / by zero
--------------------
main  2019.11.01 at 10:50:51.350 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main():2064 - [Ljava.lang.StackTraceElement;@5fd4f8f5
--------------------
main  2019.11.01 at 10:50:51.356 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main():2066 - 需要在错误日志 error 之上打锚点，报错了，a-10
main  2019.11.01 at 10:50:51.357 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main():2067 - test fail-
java.lang.ArithmeticException: / by zero
    at com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl.main(OrderBasicServiceImpl.java:2056) [classes/:?]
--------------------
main  2019.11.01 at 10:50:51.365 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main():2069 - test fail-10,java.lang.ArithmeticException: / by zero
--------------------
main  2019.11.01 at 10:50:51.366 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main():2071 - java.lang.ArithmeticException: / by zero