One-to-multiple-level link deletion of Hibernate

1. Delete multiple parties (students ):
To delete Student:
A. remove student A from the student collection of student
B. STUDENT A sets the class to null.
C. a and B have removed the association. You can delete student.

2. delete one Party (class) without cascade deletion of multiple parties:
There is student A in Class A. Now we want to delete Class A but not cascade student A and student A is moved to Class B:
A. Delete student A from the student collection in Class
B. Save or retrieve Class B
C. Designate student A to Class B
D. If the association between A and B has been removed, you can delete.


Note: No matter what type of deletion, remember to remove the association and each object should be in a persistent state.

Author: "renshan Zhishui"