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:)

main  2019.11. at ::51.331 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main(): - / by zero

--------------------

main  2019.11. at ::51.350 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main(): - [Ljava.lang.StackTraceElement;@5fd4f8f5

--------------------

main  2019.11. at ::51.356 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main(): - 需要在错误日志 error 之上打锚点，报错了，a-

main  2019.11. at ::51.357 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main(): - test fail-

java.lang.ArithmeticException: / by zero

    at com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl.main(OrderBasicServiceImpl.java:) [classes/:?]

--------------------

main  2019.11. at ::51.365 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main(): - test fail-,java.lang.ArithmeticException: / by zero

--------------------

main  2019.11. at ::51.366 CST [] ERROR com.jn.ssr.superrescue.web.order.service.impl.OrderBasicServiceImpl main(): - java.lang.ArithmeticException: / by zero