org.hibernate.hql.ast.QuerySyntaxException: INVOICE is not mapped [from INVOICE]

使用hibernate的hql语句报错：

org.hibernate.hql.ast.QuerySyntaxException: INVOICE is not mapped [from INVOICE]

原因比较简单，只要在实体类中增加映射注释-实体和表的映射 

@Entity(name = "表名")

1有问题的

@Entity
@SuppressWarnings("serial")
@Table(name = "INVOICE")
public class Invoice implements java.io.Serializable {

2正常的

@Entity(name = "INVOICE")
@SuppressWarnings("serial")
@Table(name = "INVOICE")
public class Invoice implements java.io.Serializable {

但是，涉及到多表查询的时候hql查询就无效了，这个时候报这种错误就只能更换为sql语句了