Question

Java中用Hibernate框架:实现多对多关联删除问题!

实现方法:我也设置XML属性了! inverse="true" cascade="all"
在删除时还是提示于数据库约束冲突
//删除项目
public void deleteProject(){
Session session=HibernateSessionFactory.getSession();
Transaction tran=null;
try{
tran=session.beginTransaction();
Project project=(Project)session.load(Project.class, new Long(7));
Employee employee=(Employee)session.load(Employee.class, new Long(14));
Hibernate.initialize(project.getEmployees());//加载关联信息
project.getEmployees().remove(employee);
employee.getProjects().remove(project);
project.getEmployees().removeAll(project.getEmployees());
employee.getProjects().removeAll(employee.getProjects());
session.update(employee);
session.update(project);
session.delete(project);
tran.commit();
}catch(Exception ex){
tran.rollback();
ex.printStackTrace();
}finally{
session.close();
}
}

Answer 1

加到ONE-TO-MANY的一方！