我定义了一个类：HibernateBooleanDemo
只有两个属性：id和enabled，分别是String和boolean类型，分别对应表中的id和isEnabled列。并编写了相应的get和set方法和DAO类。但是如下代码很奇怪：
String hql = "from HibernateBooleanDemo where isEnabled=false"; Session s = HibernateSessionFacTory.getSession(); Transaction t = s.beginTransaction(); Query q = s.createQuery(hql); List list = q.list(); System.out.println(list.size()); System.out.println(((HibernateBooleanDemo)list.get(0)).isEnabled()); t.commit(); HibernateSessionFacTory.closeSession();在上面的查询语句中写列名即isEnabled时可以正常运行。但是写属性enabled时，却抛出异常，大概意思是说不能解析该属性。
一直不明白是什么原因。请大家指点
【AmethystWish】:
若”from HibernateBooleanDemo where isEnabled=false”;写为”from HibernateBooleanDemo where enabled=false”;错误如下：
aused by: com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Unknown column 'enabled' in 'where clause' at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:936) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2870) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1573) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665) at com.mysql.jdbc.Connection.execSQL(Connection.java:3124) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1149) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1262) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) ... 8 more
【liandti】:
from HibernateBooleanDemo h where h.enabled=false
如果用属性就加别名
【AmethystWish】:
查询字符串改为：”from HibernateBooleanDemo h where h.enabled=false”;之后运行，结果如下：
Exception in thread "main" org.hibernate.QueryException: could not resolve property: enabled of: org.acman.demo.HibernateBooleanDemo [from org.acman.demo.HibernateBooleanDemo h where h.enabled=false] at org.hibernate.persister.entity.AbstractPropertyMapping.throwPropertyException(AbstractPropertyMapping.java:43)[Page] at org.hibernate.persister.entity.AbstractPropertyMapping.toType(AbstractPropertyMapping.java:37) at org.hibernate.persister.entity.AbstractEntityPersister.toType(AbstractEntityPersister.java:1265) at org.hibernate.hql.ast.tree.FromElementType.getPropertyType(FromElementType.java:279) at org.hibernate.hql.ast.tree.FromElement.getPropertyType(FromElement.java:372) at org.hibernate.hql.ast.tree.DotNode.getDataType(DotNode.java:539) at org.hibernate.hql.ast.tree.DotNode.prepareLhs(DotNode.java:221) at org.hibernate.hql.ast.tree.DotNode.resolve(DotNode.java:172) at org.hibernate.hql.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:94) at org.hibernate.hql.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:90) at org.hibernate.hql.ast.HqlSqlWalker.resolve(HqlSqlWalker.java:725) at org.hibernate.hql.antlr.HqlSqlBaseWalker.expr(HqlSqlBaseWalker.java:1215) at org.hibernate.hql.antlr.HqlSqlBaseWalker.exprOrSubquery(HqlSqlBaseWalker.java:4032) at org.hibernate.hql.antlr.HqlSqlBaseWalker.comparisonExpr(HqlSqlBaseWalker.java:3518) at org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1758) at org.hibernate.hql.antlr.HqlSqlBaseWalker.whereClause(HqlSqlBaseWalker.java:776) at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:577) at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281)
【AmethystWish】:
如果属性是其它类型的，如字符串类型的，运行就没有问题，如果是bool、boolean类型的就这样，不知道为什么。初学hibernante，应该有不知道的地方
【AmethystWish】:
已解决。错误总结：类映射文件中元素的name属性对应类中属性的名字,要以小写字母开头。我使用HibernateSynchronizer工具自动生成类映射文件，name属性全部以大写字母开头。
但是很奇怪，其它类型的属性没有问题，只有布尔类型的有问题。
因为在路上你就已经收获了自由自在的好心情。
