Hibernate 获取映射实体的所有外键

Question

i need to get the column names for foreign keys for all mapped hibernate entities. Does anyone know how to do that? I tried by sessionFactory.getClassMetadata - i can see all the properties names and types for all entities there, but i cannot find information about foreign keys. Does anyone have any idea? I may not use direct database query - i must extract it from hibernate metadata.

Answer 1

You can use Java Reflection:

// Loop through joined columns that has @JoinColumn annotation
for (Method method : testClass.getMethods())
{
    if (method.isAnnotationPresent(JoinColumn.class))
    {
         // name parameter is foreign key
         String foreignKey = method.getAnnotation(JoinColumn.class).name;

         // if the referencedColumnName is explicitly defined
         String foreignKey = method.getAnnotation(JoinColumn.class).referencedColumnName;
    }
}