[英]How can we sort the result by date in Hibernate?
我正在使用Hibernate从数据库中获取JSON对象。 我希望JSON对象应包含最近创建的VGI的仅前两个的所有详细信息。 但是我不知道如何限制结果集,然后在不使用HQL查询时根据创建的日期进行排序。 它正在从MySQL数据库中获取所有详细信息。
import java.util.Date;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.Table;
@Entity
@Table(name = "vgi", catalog = "coworkee5")
public class VGI {
@ManyToOne
@JoinColumn(name = "employee_id", referencedColumnName = "id", insertable = false, updatable = false)
private Employees employees;
public Employees getEmployees() {
return employees;
}
public void setEmployees(Employees employees) {
this.employees = employees;
}
@OneToMany(cascade = CascadeType.ALL, targetEntity = VgiGoals.class, mappedBy = "vgi")
private List<VgiGoals> vgiGoals;
public List<VgiGoals> getVgiGoals() {
return vgiGoals;
}
public void setVgi_goals(List<VgiGoals> vgiGoals) {
this.vgiGoals = vgiGoals;
}
public VGI() {
}
@Id
@Column(name = "id")
private String id;
@Column(name = "title")
private String vgi;
@Column(name = "employee_id")
private String employee_id;
@Column(name = "created_on")
private String created;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getvgi() {
return vgi;
}
public void setvgi(String vgi) {
this.vgi = vgi;
}
public String getEmployee_id() {
return employee_id;
}
public void setEmployee_id(String employee_id) {
this.employee_id = employee_id;
}
public String getCreated() {
return created;
}
public void setCreated(String created) {
this.created = created;
}
}
添加@OrderBy
批注,如下所示。
@OneToMany(cascade = CascadeType.ALL, targetEntity = VgiGoals.class, mappedBy = "vgi")
@OrderBy("createdOn DESC")
private List<VgiGoals> vgiGoals;
注意:用VgiGoals类中的日期字段替换createdOn。
对于限制,请在查询中使用以下方法。
query.setFirstResult(1).setMaxResults(10);
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