我想获取Caused by:后面的错误信息，怎么得到

[internet2006yn]

Caused by: java.sql.BatchUpdateException: Duplicate entry '123' for key 'unique_userName'
如上列，这个异常最终由
org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update抛出
使用getMessage()得到的也是Could not execute JDBC batch update
但是我想获得Duplicate entry '123' for key 'unique_userName'请问该怎么做

[脆爽]

请问楼主是怎么解决的？

[w237or45]

	StringBuffer exceptionStr = new StringBuffer();

                StackTraceElement[] elements = ex.getCause().getStackTrace();

                for (int i = 0; i < elements2.length; i++) {
			exceptionStr.append(elements2[i].toString()+"\n");
			
			Log.i("crash","cause"+ elements2[i].toString());
		}