springboot全局异常处理，不会去拦截sql异常，导致错误返回到前端，，将sql中的字段暴露出来，很危险，，

因为ExceptionHandler 只认我们注入类的名称，，而SQLException不在里面，，
在RuntimeException中拦截：

  @ExceptionHandler(RuntimeException.class)public AjaxResult handleRuntimeException(RuntimeException e, HttpServletRequest request){String requestURI = request.getRequestURI();log.error("请求地址'{}',发生未知异常.", requestURI, e);Throwable rootCause = e.getCause();if (rootCause instanceof SQLIntegrityConstraintViolationException){return AjaxResult.error("数据不唯一");}if (rootCause.toString().startsWith("org.mariadb.jdbc")){return AjaxResult.error("数据库错误");}return AjaxResult.error(e.getMessage());}

引用：https://download.csdn.net/blog/column/12507643/134327833