Question

我有一个班级AppUser;

class AppUser {
   private String firstName;
   private String lastName;
   //-- getters and setters
}

我还有另一个班级Student;

class Student {
   private AppUser appUser;
   private Date dateOfBirth;
   //-- getters and setters
}

我如何搜索学生John Doe，firstName John，lastName Doe？

如果是出生日期属性，我会在日期创建Criteria并添加相等限制（Restristions.eq）。我如何为AppUser对象中的lastName和firstName执行此操作？

Answer 1

您可能需要添加别名...类似于：

List students = session.createCriteria(Student.class).createAlias("appUser", "user").add(Restrictions.eq("user.firstName", firstName)).list();

没有别名：

List students = session.createCriteria(Student.class).add(Restrictions.eq("appUser.firstName", firstName)).list();

Answer 2

查询：

Query q = session.createQuery(
    "SELECT s from Student s WHERE s.appUser.firstName=:firstName AND s.appUser.lastName=:lastName");
q.setParameter("firstName", "John");
q.setParameter("lastName", "Doe");

要使用标准，请检查this thread

另请查看this page from hibernate docs

对象属性的Hibernate Criteria / Query

2 个答案: