Solve the hibernate deletion exception: Deleted Object wocould be re-Saved by cascade (remove deleted object from Associatio

When hibernate deletes an association, there will be an eleted object wocould be re-Saved by cascade (remove deleted object from associations) exception. There are usually three solutions based on others' experience:

Method 1 Delete the cascade of the set side:
Method 2 Delete the link after it is resolved

Onside. getmanys (). Remove (thisys ); // Removes the object to be deleted from the associated set.
Thisloud. setone ( Null ); // Set the corresponding Party to be empty to cancel the relationship between them.
Manydao. Delete (thisdao );

Method 3: Add cascade in sequence-to-one, but the value cannot be none.