One-to-one correlation mapping/component mapping in Hibernate

Hibernate mappings: one-to-one correlation

　1. Follow the foreign key map

2. Follow the primary key mapping

　　　Component Mappings

The following is an example of the Employee Account form and the Employee Profile table (a one-to-two relationship between the employee account and the file table), which is described in the following two mapping relationships, and each of these mappings is used to perform persistent operations

(1) The employee file is saved and assigned to an employee account.

(2) Load the account information while loading the employee profile

One: Map by foreign key

One-to-one correlation mapping/component mapping in Hibernate