hibernate“字段列表”中的JPA未知列

Question

我正在编写一个spring boot+Hibernate JPA应用程序，我的Hibernate代码不工作，下面是详细信息

实体类：

@Entity
@Table(name="user")
public class UserBean {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "idUser")
    String id;

    @Column(name = "UserName")
    String name;

    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

服务/DAO：

@Transactional
@Repository
public class SpringBootService {

    @PersistenceContext 
    private EntityManager entityManager;

    public boolean userLogin(UserBean bean) {

        String hql = "FROM UserBean WHERE id = ? ";
        int count = entityManager.createQuery(hql).setParameter(0, bean.getId())
                .getResultList().size();
        return count > 0 ? true : false;
    }

}

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'userbean0_.id_user' in 'field list'
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_162]

我已经检查了实体类中的表名和列名，所有这些都是正确的，这是一个简单的映射，我也不涉及第二个表。

Answer 1

试试这个：

String hql = "FROM UserBean WHERE id = ?1 ";
    int count = entityManager.createQuery(hql).setParameter(1, bean.getId())
            .getResultList().size();

EntityClass：

import javax.persistence.*;
@Entity
@Table(name="user")
public class UserBean {

@Id
@Column(name = "idUser")
String id;

@Column(name = "UserName")
String name;

public String getId() {
    return id;
}
public void setId(String id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}

}