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[英]Spring Data JPA date query doesn't work for Date been and date greater than
[英]how to include a greater than Date in a JPA query?
我有一個基於JPA的項目,如下所示:
@Entity
@Table(name="events")
public class Event implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
private String data;
@Temporal(TemporalType.TIMESTAMP)
private java.util.Date eventDate;
/* ... getters & setters */
}
在我的DAO中,我這樣做:
public void checkForEvents(String text, java.util.Date myDate) {
String query = "SELECT e FROM Event e WHERE e.data LIKE '%?1%' AND e.eventDate > ?2";
Query q = getEntityManager().createQuery(query);
q.setParameter(1, text);
q.setParameter(2, myDate);
q.getSingleResult() /* and so on ... */
}
當我運行DAO代碼時,出現此錯誤:
The parameter "0" is of type "java.lang.String", but the declaration in the query is for type "java.util.Date".
我究竟做錯了什么?
該消息看起來很奇怪,但是錯誤在第一個參數中。 您只能將值作為參數傳遞,因此應將e.data LIKE '%?1%'
替換為e.data LIKE ?1
,並在Java代碼中用%
e.data LIKE ?1
文本。
我認為這與不能在文字中使用參數(即'%?1%'
)有關。
請嘗試以下查詢:
SELECT e FROM Event e WHERE e.data LIKE CONCAT('%', ?1, '%') AND e.eventDate > ?2
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