Question

我的代码中有实体AnnouncementEntity：

public class AnnouncementEntity {

    //columns
    private long id;    
    ***
    private Boolean on;
    ***
    @Column(name="ACTIVE")
    public Boolean getOn() {
        return on;
    }

    public void setOn(Boolean on) {
        this.on = on;
    }
}

我试图获取所有“真实”的记录。在这个领域：

TypedQuery<AnnouncementEntity> query = 
em.createQuery("select p from AnnouncementEntity p where p.on = TRUE",       AnnouncementEntity.class);

但我面临例外：

SEVERE: java.lang.IllegalArgumentException: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: p near line 1, column 60 [select p from com.ui4ivr.entity.AnnouncementEntity p where p.on = TRUE] at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1679) at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1602) at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1608) at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:313) at com.ui4ivr.dao.daoImpl.getAllAnnsVShort(daoImpl.java:933) at com.ui4ivr.view.MainView.enter(MainView.java:259)

你能说出来是什么问题吗？

Answer 1

根据您对ACTIVE列的定义，您应该相应地映射您的媒体资源：

org.hibernate.type.BooleanType将布尔值映射到JDBC BIT类型
org.hibernate.type.NumericBooleanType将布尔值映射到JDBC INTEGER类型为0 = false，1 = true
org.hibernate.type.YesNoType将布尔值映射到JDBC CHAR类型（＆＃39; N＆＃39; |＆＃39; n＆＃39;）= false，（＆＃39; Y＆＃39; |＆＃39; y＆＃39;）= true
org.hibernate.type.TrueFalseType将布尔值映射到JDBC CHAR类型 as（＆＃39; F＆＃39; |＆＃39; f＆＃39;）= false，（＆＃39; T＆＃39; |＆＃39; t＆＃39;）= true

例如，如果您的ACTIVE列是CHAR（1）并且存储了＆＃39; Y＆＃39;或者＆＃39; N＆＃39;值，您应该在您的实体中定义相关方法：

//columns
private long id;    

@Type(type="yes_no")
@Column(name="ACTIVE")
private Boolean on;

public Boolean getOn() {
    return on;
}

public void setOn(Boolean on) {
    this.on = on;
}

另外，请更改您的查询：

TypedQuery<AnnouncementEntity> query = 
em.createQuery("select p from AnnouncementEntity p where p.on is TRUE", AnnouncementEntity.class);

TypedQuery无法在where block中继续使用boolean

1 个答案: