当我调用JPA的save()时,它给出了ConstraintViolation异常的异常,但它位于嵌套异常内部。at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:259)~[mssql-jdbc-6.4.0.jre8.jar:na]
at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResu