我有一个非常简单的实体产品,它有代码,名称和标签.标签存储在另一个带有product_id和tag列的表(product_tag)中.

我需要使用CriteriaQuery搜索带有某些标签的产品.举个例子,我想找到具有’fruit’和’red’标签的产品.

使用spring 4.1.x,spring-data-jpa 1.8和hibernate 4.2.x.

我的实体只是;

@Entity
@Table(name = "product",uniqueConstraints ={
        @UniqueConstraint(columnNames = "code")
    }
)
@NamedQueries({
        @NamedQuery(name = "Product.findAll",query = "select p from Product p")
})
public class Product extends EntityWithId {

    @Column(name = "code",length = 128)
    private String code;

    @Column(name = "name",length = 512)
    protected String name;

    @ElementCollection(fetch = FetchType.EAGER)
    @CollectionTable(name="product_tag",joinColumns=@JoinColumn(name="product_id"))
    @Column(name="tag")
    private Set

private void search() {

    CriteriaBuilder builder = entityManager.getCriteriaBuilder();
    CriteriaQuery

java.lang.IllegalArgumentException: Parameter value [fruit] did not match expected type [java.util.Set (n/a)]