Java 写入Hibernate HQL时出错_Java_Hibernate_Hql

Java 写入Hibernate HQL时出错

java hibernate

Java 写入Hibernate HQL时出错,java,hibernate,hql,Java,Hibernate,Hql,我正在测试以下hql，但得到一个错误 String SQL="From Bid bid where bid.Auction.AuctionId=3655" 类投标映射文件： <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping

我正在测试以下hql，但得到一个错误

String SQL="From Bid bid where bid.Auction.AuctionId=3655"

类投标映射文件：

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Jan 19, 2011 5:25:35 AM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
    <class name="com.BiddingSystem.Models.Bid" table="BID">
        <id name="BidId" type="long">
            <column name="BIDID" />
            <generator class="native" />
        </id>
        <property name="BidAmount" type="long">
            <column name="BIDAMOUNT" />
        </property>
        <many-to-one name="User" class="com.BiddingSystem.Models.Users" fetch="join">
            <column name="UserId" />
        </many-to-one>
        <many-to-one name="auction" class="com.BiddingSystem.Models.Auction" fetch="join" lazy="false">
            <column name="AuctionId" />
        </many-to-one>
        <property name="TimePosted" type="java.util.Date" access="field">
            <column name="TIMEPOSTED" />
        </property>
    </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 28, 2010 9:14:12 PM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
    <class name="com.BiddingSystem.Models.Auction" table="AUCTION">
        <id name="AuctionId" type="long">
            <column name="AUCTIONID" />
            <generator class="native" />
        </id>
        <property name="StartTime" type="java.util.Date">
            <column name="STARTTIME" />
        </property>
        <property name="EndTime" type="java.util.Date">
            <column name="ENDTIME" />
        </property>
         <property name="DatePlaced" type="java.util.Date">
            <column name="DatePlaced" />
        </property>
        <property name="StartingBid" type="long">
            <column name="STARTINGBID" />
        </property>
        <property name="MinIncrement" type="long">
            <column name="MININCREMENT" />
        </property>
        <many-to-one name="CurrentItem" class="com.BiddingSystem.Models.Item" fetch="join" not-null="true" cascade="all" unique="true" lazy="false">
            <column name="CURRENTITEM" />
        </many-to-one>

        <property name="AuctionStatus" type="java.lang.String">
            <column name="AUCTIONSTATUS" />
        </property>
        <property name="BestBid" type="long">
            <column name="BESTBID" />
        </property>
        <many-to-one name="User" class="com.BiddingSystem.Models.Users" fetch="join">
            <column name="UserId" />
        </many-to-one>
    </class>
</hibernate-mapping>

拍卖映射文件：

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Jan 19, 2011 5:25:35 AM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
    <class name="com.BiddingSystem.Models.Bid" table="BID">
        <id name="BidId" type="long">
            <column name="BIDID" />
            <generator class="native" />
        </id>
        <property name="BidAmount" type="long">
            <column name="BIDAMOUNT" />
        </property>
        <many-to-one name="User" class="com.BiddingSystem.Models.Users" fetch="join">
            <column name="UserId" />
        </many-to-one>
        <many-to-one name="auction" class="com.BiddingSystem.Models.Auction" fetch="join" lazy="false">
            <column name="AuctionId" />
        </many-to-one>
        <property name="TimePosted" type="java.util.Date" access="field">
            <column name="TIMEPOSTED" />
        </property>
    </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 28, 2010 9:14:12 PM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
    <class name="com.BiddingSystem.Models.Auction" table="AUCTION">
        <id name="AuctionId" type="long">
            <column name="AUCTIONID" />
            <generator class="native" />
        </id>
        <property name="StartTime" type="java.util.Date">
            <column name="STARTTIME" />
        </property>
        <property name="EndTime" type="java.util.Date">
            <column name="ENDTIME" />
        </property>
         <property name="DatePlaced" type="java.util.Date">
            <column name="DatePlaced" />
        </property>
        <property name="StartingBid" type="long">
            <column name="STARTINGBID" />
        </property>
        <property name="MinIncrement" type="long">
            <column name="MININCREMENT" />
        </property>
        <many-to-one name="CurrentItem" class="com.BiddingSystem.Models.Item" fetch="join" not-null="true" cascade="all" unique="true" lazy="false">
            <column name="CURRENTITEM" />
        </many-to-one>

        <property name="AuctionStatus" type="java.lang.String">
            <column name="AUCTIONSTATUS" />
        </property>
        <property name="BestBid" type="long">
            <column name="BESTBID" />
        </property>
        <many-to-one name="User" class="com.BiddingSystem.Models.Users" fetch="join">
            <column name="UserId" />
        </many-to-one>
    </class>
</hibernate-mapping>

错误：

Caused by: org.hibernate.QueryException: could not resolve property: Auction of: com.BiddingSystem.Models.Bid [From com.BiddingSystem.Models.Bid bid where bid.Auction.AuctionId=3655 and bid.User.UserId=3657]
    at org.hibernate.persister.entity.AbstractPropertyMapping.propertyException(AbstractPropertyMapping.java:81)
    at org.hibernate.persister.entity.AbstractPropertyMapping.toType(AbstractPropertyMapping.java:75)
    at org.hibernate.persister.entity.AbstractEntityPersister.toType(AbstractEntityPersister.java:1449)
    at org.hibernate.hql.ast.tree.FromElementType.getPropertyType(FromElementType.java:315)
    at org.hibernate.hql.ast.tree.FromElement.getPropertyType(FromElement.java:487)
    at org.hibernate.hql.ast.tree.DotNode.getDataType(DotNode.java:611)
    at org.hibernate.hql.ast.tree.DotNode.prepareLhs(DotNode.java:263)
    at org.hibernate.hql.ast.tree.DotNode.resolve(DotNode.java:210)
    at org.hibernate.hql.ast.tree.DotNode.resolveFirstChild(DotNode.java:175)
    at org.hibernate.hql.ast.HqlSqlWalker.lookupProperty(HqlSqlWalker.java:571)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.addrExpr(HqlSqlBaseWalker.java:4774)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.expr(HqlSqlBaseWalker.java:1326)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.exprOrSubquery(HqlSqlBaseWalker.java:4471)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.comparisonExpr(HqlSqlBaseWalker.java:3944)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:2047)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1972)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.whereClause(HqlSqlBaseWalker.java:831)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:617)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:301)
    at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:244)
    at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254)
    at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)
    at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
    at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
    at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
    at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:124)
    at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
    at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
    at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1770)
    at com.BiddingSystem.server.ServiceImpl.getBid(ServiceImpl.java:1463)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at net.sf.gilead.gwt.PersistentRemoteService.processCall(PersistentRemoteService.java:174)

原因：org.hibernate.QueryException:无法解析属性：拍卖：com.BiddingSystem.Models.Bid[来自com.BiddingSystem.Models.Bid Bid，其中Bid.Auction.AuctionId=3655和Bid.User.UserId=3657]
位于org.hibernate.persister.entity.AbstractPropertyMapping.propertyException（AbstractPropertyMapping.java:81）
位于org.hibernate.persister.entity.AbstractPropertyMapping.toType（AbstractPropertyMapping.java:75）
位于org.hibernate.persister.entity.AbstractEntityPersister.toType（AbstractEntityPersister.java:1449）
位于org.hibernate.hql.ast.tree.FromElementType.getPropertyType（FromElementType.java:315）
位于org.hibernate.hql.ast.tree.FromElement.getPropertyType（FromElement.java:487）
位于org.hibernate.hql.ast.tree.DotNode.getDataType（DotNode.java:611）
位于org.hibernate.hql.ast.tree.DotNode.prepareLhs（DotNode.java:263）
位于org.hibernate.hql.ast.tree.DotNode.resolve（DotNode.java:210）
位于org.hibernate.hql.ast.tree.DotNode.resolveFirstChild（DotNode.java:175）
位于org.hibernate.hql.ast.hqlslwalker.lookupProperty（hqlslwalker.java:571）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.addrExpr（HqlSqlBaseWalker.java:4774）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.expr（HqlSqlBaseWalker.java:1326）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.exprOrSubquery（HqlSqlBaseWalker.java:4471）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.comparisonextpr（HqlSqlBaseWalker.java:3944）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:2047）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr（HqlSqlBaseWalker.java:1972）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.where子句（HqlSqlBaseWalker.java:831）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.query（HqlSqlBaseWalker.java:617）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement（HqlSqlBaseWalker.java:301）
位于org.hibernate.hql.antlr.HqlSqlBaseWalker.statement（HqlSqlBaseWalker.java:244）
位于org.hibernate.hql.ast.QueryTranslatorImpl.analyze（QueryTranslatorImpl.java:254）
位于org.hibernate.hql.ast.QueryTranslatorImpl.docomfile（QueryTranslatorImpl.java:185）
位于org.hibernate.hql.ast.QueryTranslatorImpl.compile（QueryTranslatorImpl.java:136）
在org.hibernate.engine.query.HQLQueryPlan.（HQLQueryPlan.java:101）
在org.hibernate.engine.query.HQLQueryPlan.（HQLQueryPlan.java:80）
位于org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan（QueryPlanCache.java:124）
位于org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan（AbstractSessionImpl.java:156）
位于org.hibernate.impl.AbstractSessionImpl.createQuery（AbstractSessionImpl.java:135）
位于org.hibernate.impl.SessionImpl.createQuery（SessionImpl.java:1770）
在com.BiddingSystem.server.ServiceImpl.getBid（ServiceImpl.java:1463）
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）中
位于java.lang.reflect.Method.invoke（Method.java:597）
位于net.sf.gilead.gwt.PersistentRemoteService.processCall（PersistentRemoteService.java:174）

我打赌这会奏效

String SQL="From Bid bid where bid.auction.auctionId=3655"

在java中，属性应该总是以小写字符开头

我打赌这会奏效

String SQL="From Bid bid where bid.auction.auctionId=3655"

在java中，属性应该总是以小写字符开头

根据您的

Bid

映射文件，您的SQL应该如下所示：-

String SQL="From Bid bid where bid.auction.AuctionId=3655"

但说真的，你的豆子里的骆驼壳真的是一团糟。bean中的属性名称应以小写字母开头（例如：
auctionId
、
auction
、
timePosted
等）
根据您的
Bid
映射文件，您的SQL应该如下所示：-

String SQL="From Bid bid where bid.auction.AuctionId=3655"

但说真的，你的豆子里的骆驼壳真的是一团糟。bean中的属性名称应以小写字母开头（例如：
auctionId
、
auction
、
timePosted
等）
感谢您将工作sql设置在轨道上。工作sql是字符串sql=“从Bid Bid where Bid.auction.AuctionId=3655”是否可以执行类似操作从Bid Bid选择不同的Bid.auction是：感谢您将工作sql设置在轨道上。工作sql是字符串sql=“从Bid Bid where Bid.auction.AuctionId=3655”可以这样做吗？从出价中选择不同的出价。拍卖可以这样做吗？从出价中选择不同的出价。拍卖应该可以。如需更多信息，请参阅14.7 at。是否可以执行类似操作选择不同的出价。从出价中选择拍卖是的，应该可以。有关更多信息，请参见第14.7节。