java - OneToMany/ManyToOne 关系的 Hibernate 标准

Question

我在两个对象之间有 OneToMany/ManyToOne 关系，例如:

public class Company {
    private Long compid;
    private String companyName;

    @OneToMany(mappedBy = "company", cascade = CascadeType.ALL)
    @LazyCollection(LazyCollectionOption.FALSE)
    private List<Employee> employees;
}

public class Employee {
    private Long empid;
    private String fstName;
    private String lstName;
    private String sal;

    @ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    @NotFound(action = NotFoundAction.IGNORE)
    @JoinColumn(name = "compid", nullable = true)
    private Company company;
}

我想获得拥有 company.companyName like xxxx% 的员工。我试过类似的东西:

Criteria criteria = session.createCriteria(Employee.class);
criteria.createAlias("company", "company");
criteria.add(Restrictions.like("company.companyName ", "xxxx%"));
return criteria.list();

但是我得到了错误:

could not resolve property: company.companyName of: Employee

这段代码哪里有问题？

Answer 1

您应该使用 criteria.createCriteria 而不是 criteria.createAlias