宝齐莱算什么档次的表

Question

How can I use CriteriaQuery with BETWEEN clause in Date? I have tried this without success;

the DAO method:

public List<Registry> listRegistry(Date init){
    List<Registry> registrys = null;
    try{
        Date currentDate = new Date();
        CriteriaBuilder cb = getEm().getCriteriaBuilder();
        CriteriaQuery<Registry> c = cb.createQuery(Registry.class);
        Root<Registry> registry= c.from(Registry.class);

        // get error here; "The method get(String) in the type Path<Registry> is not applicable for the arguments (String, Date, Date)"
        c.select(registry).where(cb.between(registry.get("dateEntry", init, currentDate)));

        registrys = getEm().createQuery(c).getResultList();

    }
    catch (NoResultException x) {
        //does nothing
    }
    return registrys;
}

and the Entity Class Registry:

@Entity
public class Registry {

@GenericGenerator(name="gen",strategy="increment")
@GeneratedValue(generator="gen")
@Column(name = "id", unique = true, nullable = false, precision = 15, scale = 0)
@Id
private int id;

private Date dateEntry;

// getters and setters .....
}

With these error : "The method get(String) in the type Path is not applicable for the arguments (String, Date, Date)" ; How can I solve this?

Answer 1

Reviewing your code, it looks like a typo.

You have

// get error here; "The method get(String) in the type Path<Registry> is not applicable for the arguments (String, Date, Date)"
c.select(registry).where(cb.between(registry.get("dateEntry", init, currentDate)));

Which is a compiler error, means that you're trying to call get(String)in the type Path<Registry> with the arguments (String, Date, Date)

Look at the javadoc of CriteriaBuilder.between(Expression,Value,Value), this is the method you need to call with 3 arguments not Path.get(String).

It should look something like this.

 Path<Date> dateEntryPath = registry.get("dateEntry");
 Predicate predicate = cb.between(dateEntryPath,init,currentDate);
 c.select(registry).where(predicate);