JPA: ManyToMany 多表接连

 官方文档： https://docs.oracle.com/javaee/7/api/javax/persistence/ManyToMany.html

 

 

参考文档：

• What is An Association? : https://docs.oracle.com/cd/A97336_01/buslog.102/bc4j/developing_bc_projects/bc_awhatisanassoc.htm