【发布时间】：2015-02-18 04:31:47
【问题描述】：
我想在休眠中使用 HQL 中的内部联接从两个表中获取数据，但它不工作不知道为什么？ 给出了 Pojo 类及其映射文件：
public class Org implements java.io.Serializable {
private String quarter;
private Orgtype orgtype;
private String parent;
private Set regions = new HashSet(0);
private Set cfgOrgObjects = new HashSet(0);
public Org() {
}
public Org(String quarter, Orgtype orgtype, String parent) {
this.quarter = quarter;
this.orgtype = orgtype;
this.parent = parent;
}
public Org(String quarter, Orgtype orgtype, String parent, Set regions, Set cfgOrgObjects) {
this.quarter = quarter;
this.orgtype = orgtype;
this.parent = parent;
this.regions = regions;
this.cfgOrgObjects = cfgOrgObjects;
}
public String getQuarter() {
return this.quarter;
}
public void setQuarter(String quarter) {
this.quarter = quarter;
}
public Orgtype getOrgtype() {
return this.orgtype;
}
public void setOrgtype(Orgtype orgtype) {
this.orgtype = orgtype;
}
public String getParent() {
return this.parent;
}
public void setParent(String parent) {
this.parent = parent;
}
}
组织类型 pojo 类：
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- Generated Feb 4, 2015 2:30:35 AM by Hibernate Tools 3.6.0 -->
<hibernate-mapping>
<class name="pojo.Org" table="ORG" schema="myschema">
<id name="quarter" type="string">
<column name="QUARTER" length="600" />
<generator class="assigned" />
</id>
<many-to-one name="orgtype" class="pojo.Orgtype" fetch="select">
<column name="TYPE" length="30" not-null="true" />
</many-to-one>
<property name="parent" type="string">
<column name="PARENT" length="30" not-null="true" />
</property>
</class>
</hibernate-mapping>
组织类型表的映射文件
public class Orgtype implements java.io.Serializable {
private String type;
private String description;
// private Set orgs = new HashSet(0);
private Set<Org> orgs = new HashSet<Org>();
public Orgtype() {
}
public Orgtype(String type, String description) {
this.type = type;
this.description = description;
}
public Orgtype(String type, String description, Set orgs) {
this.type = type;
this.description = description;
this.orgs = orgs;
}
public String getType() {
return this.type;
}
public void setType(String type) {
this.type = type;
}
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
public Set getOrgs() {
return this.orgs;
}
public void setOrgs(Set orgs) {
this.orgs = orgs;
}
}
组织类型映射文件：
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<!-- Generated Feb 4, 2015 2:30:35 AM by Hibernate Tools 3.6.0 -->
<hibernate-mapping>
<class name="pojo.Orgtype" table="ORGTYPE" schema="myschema">
<id name="type" type="string">
<column name="TYPE" length="30" />
<generator class="assigned" />
</id>
<property name="description" type="string">
<column name="DESCRIPTION" length="600" not-null="true" />
</property>
<set name="orgs" table="ORG" inverse="true" lazy="true" fetch="select">
<key>
<column name="TYPE" length="30" not-null="true" />
</key>
<one-to-many class="pojo.Org" />
</set>
</class>
</hibernate-mapping>
我使用的查询是：
Query q = sess.createQuery("SELECT og.quarter,og.parent,ogt.type,ogt.description FROM Org og INNER JOIN Orgtype ogt ogt.type = og.Orgtype" );
错误：
ERROR: line 1:94: unexpected token: ogt
ERROR: line 1:94: unexpected token: ogt
line 1:94: unexpected token: ogt
at org.hibernate.hql.internal.antlr.HqlBaseParser.fromJoin(HqlBaseParser.java:1694)
at org.hibernate.hql.internal.antlr.HqlBaseParser.fromClause(HqlBaseParser.java:1349)
at org.hibernate.hql.internal.antlr.HqlBaseParser.selectFrom(HqlBaseParser.java:1055)
at org.hibernate.hql.internal.antlr.HqlBaseParser.queryRule(HqlBaseParser.java:701)
at org.hibernate.hql.internal.antlr.HqlBaseParser.selectStatement(HqlBaseParser.java:294)
at org.hibernate.hql.internal.antlr.HqlBaseParser.statement(HqlBaseParser.java:157)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:268)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:182)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:138)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:105)
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168)
at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:221)
at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:199)
at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1778)
at managedBean.ManagedBean.insertf(ManagedBean.java:140)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.sun.el.parser.AstValue.invoke(AstValue.java:275)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:147)
at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)
at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:818)
at javax.faces.component.UICommand.broadcast(UICommand.java:300)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:744)
【问题讨论】：
-
为什么你没有在 POJO org 中为 set 创建 setter 和 getter？
-
它出现在我的映射文件中，但它的书写错误。对不起
标签： java hibernate hql inner-join