通过查询来hibernate多对多数据检索
请帮助我，我认为有些事情我做得不对。 我有User和Contact ，这是Many-to-Many关系。
User.java：
public class User { private Integer userID; private String userLoginEmail; private Set contactSet = new HashSet(); public User() { } . getters and setters .
Contact.java
public class Contact implements Serializable { private Integer contactID; private Set userSet= new HashSet(); public Contact() { } . getters and setters . .
用户映射：
联系人映射：
我正在尝试编写查询以获取与登录的User关联的Contacts 。
当我尝试编写以下查询时：
Query query=session.createQuery("select contact from com.src.model.Contact contact join contact.userSet u where u.userID=:userID"); query.setParameter("userID", user.getUserID()); contactList=query.list();
我收到以下错误：
org.hibernate.QueryException: could not resolve property: userID of: com.src.model.Contact [select contact from com.src.model.Contact contact join contact.userSet u where u.userID=:userID]
我知道错误消息的含义，但我无法弄清楚如何编写此查询。
首先我喜欢这样： Hibernate多对多数据检索
但现在我正在编写查询，因为我需要检查Contact状态和其他参数。
谢谢哈比尔
这就是我调用查询的方式：
@Override public List getContactList(User user) { log.info("getContactList(User user)"); List contactList = new ArrayList(); Session session = sessionFactory.getCurrentSession(); System.out.println("About to hit the query"); Query query=session.createQuery("select contact from com.smallworks.model.Contact contact join contact.userSet u where u.userID=:userID"); query.setParameter("userID", user.getUserID()); contactList=query.list(); return contactList; }
以下是堆栈跟踪：
About to hit the query 18:56:01.011 [http-bio-8080-exec-6] DEBUG ohhql.ast.QueryTranslatorImpl - parse() - HQL: select contact from com.smallworks.model.Contact contact join contact.userSet u where u.userID=:userID 18:56:01.020 [http-bio-8080-exec-6] DEBUG org.hibernate.hql.ast.AST - --- HQL AST --- \-[QUERY] 'query' +-[SELECT_FROM] 'SELECT_FROM' | +-[FROM] 'from' | | +-[RANGE] 'RANGE' | | | +-[DOT] '.' | | | | +-[DOT] '.' | | | | | +-[DOT] '.' | | | | | | +-[IDENT] 'com' | | | | | | \-[IDENT] 'smallworks' | | | | | \-[IDENT] 'model' | | | | \-[IDENT] 'Contact' | | | \-[ALIAS] 'contact' | | \-[JOIN] 'join' | | +-[DOT] '.' | | | +-[IDENT] 'contact' | | | \-[IDENT] 'userSet' | | \-[ALIAS] 'u' | \-[SELECT] 'select' | \-[IDENT] 'contact' \-[WHERE] 'where' \-[EQ] '=' +-[DOT] '.' | +-[IDENT] 'u' | \-[IDENT] 'userID' \-[COLON] ':' \-[IDENT] 'userID' 18:56:01.020 [http-bio-8080-exec-6] DEBUG org.hibernate.hql.ast.ErrorCounter - throwQueryException() : no errors 18:56:01.041 [http-bio-8080-exec-6] DEBUG ohhql.antlr.HqlSqlBaseWalker - select < contact0_ 18:56:01.051 [http-bio-8080-exec-6] DEBUG ohhql.ast.tree.FromReferenceNode - Resolved : contact -> contact0_.CONTACT_ID 18:56:01.053 [http-bio-8080-exec-6] DEBUG org.hibernate.hql.ast.tree.DotNode - getDataType() : userSet -> org.hibernate.type.SetType(com.smallworks.model.Contact.userSet) 18:56:01.053 [http-bio-8080-exec-6] DEBUG ohhql.ast.tree.FromElementFactory - createManyToMany() : path = contact.userSet role = com.smallworks.model.Contact.userSet associatedEntityName = com.smallworks.model.Contact 18:56:01.055 [http-bio-8080-exec-6] DEBUG o.hibernate.hql.ast.tree.FromElement - FromClause{level=1} : com.smallworks.model.Contact (u) -> contact2_ 18:56:01.055 [http-bio-8080-exec-6] DEBUG o.hibernate.hql.ast.tree.FromClause - addJoinByPathMap() : contact.userSet -> smallworksdb.CONTACT contact2_ 18:56:01.055 [http-bio-8080-exec-6] DEBUG org.hibernate.hql.ast.tree.DotNode - dereferenceCollection() : Created new FROM element for contact.userSet : smallworksdb.USER_CONTACT contact2_ 18:56:01.055 [http-bio-8080-exec-6] DEBUG ohhql.ast.tree.FromReferenceNode - Resolved : contact.userSet -> . 18:56:01.056 [http-bio-8080-exec-6] DEBUG org.hibernate.hql.ast.HqlSqlWalker - createFromJoinElement() : -- join tree -- \-[JOIN_FRAGMENT] FromElement: 'smallworksdb.USER_CONTACT contact2_' FromElement{explicit,not a collection join,not a fetch join,fetch non-lazy properties,classAlias=u,role=com.smallworks.model.Contact.userSet,tableName=smallworksdb.CONTACT,tableAlias=contact2_,origin=smallworksdb.CONTACT contact0_,colums={contact0_.CONTACT_ID ,className=com.smallworks.model.Contact}} 18:56:01.056 [http-bio-8080-exec-6] DEBUG ohhql.ast.tree.FromReferenceNode - Resolved : contact -> contact0_.CONTACT_ID 18:56:01.060 [http-bio-8080-exec-6] DEBUG ohhql.ast.tree.FromReferenceNode - Resolved : u -> contact2_.CONTACT_ID 18:56:01.060 [http-bio-8080-exec-6] DEBUG oswsmaAnnotationMethodHandlerExceptionResolver - Resolving exception from handler [com.smallworks.controller.ProjectController@1f183871]: org.hibernate.QueryException: could not resolve property: userID of: com.smallworks.model.Contact [select contact from com.smallworks.model.Contact contact join contact.userSet u where u.userID=:userID] 18:56:01.062 [http-bio-8080-exec-6] DEBUG oswsmaResponseStatusExceptionResolver - Resolving exception from handler [com.smallworks.controller.ProjectController@1f183871]: org.hibernate.QueryException: could not resolve property: userID of: com.smallworks.model.Contact [select contact from com.smallworks.model.Contact contact join contact.userSet u where u.userID=:userID] 18:56:01.062 [http-bio-8080-exec-6] DEBUG oswsmsDefaultHandlerExceptionResolver - Resolving exception from handler [com.smallworks.controller.ProjectController@1f183871]: org.hibernate.QueryException: could not resolve property: userID of: com.smallworks.model.Contact [select contact from com.smallworks.model.Contact contact join contact.userSet u where u.userID=:userID] 18:56:01.069 [http-bio-8080-exec-6] DEBUG osweb.servlet.DispatcherServlet - Could not complete request org.hibernate.QueryException: could not resolve property: userID of: com.smallworks.model.Contact [select contact from com.smallworks.model.Contact contact join contact.userSet u where u.userID=:userID] at org.hibernate.persister.entity.AbstractPropertyMapping.propertyException(AbstractPropertyMapping.java:67) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.persister.entity.AbstractPropertyMapping.toType(AbstractPropertyMapping.java:61) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.persister.entity.AbstractEntityPersister.toType(AbstractEntityPersister.java:1385) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.persister.collection.AbstractCollectionPersister.toType(AbstractCollectionPersister.java:1457) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.tree.FromElementType.getPropertyType(FromElementType.java:302) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.tree.FromElement.getPropertyType(FromElement.java:407) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.tree.DotNode.getDataType(DotNode.java:589) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.tree.DotNode.prepareLhs(DotNode.java:264) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.tree.DotNode.resolve(DotNode.java:211) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:117) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:113) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.HqlSqlWalker.resolve(HqlSqlWalker.java:750) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.antlr.HqlSqlBaseWalker.expr(HqlSqlBaseWalker.java:1216) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.antlr.HqlSqlBaseWalker.exprOrSubquery(HqlSqlBaseWalker.java:4041) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.antlr.HqlSqlBaseWalker.comparisonExpr(HqlSqlBaseWalker.java:3525) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1762) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.antlr.HqlSqlBaseWalker.whereClause(HqlSqlBaseWalker.java:776) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:577) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:251) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:183) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:134) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.engine.query.HQLQueryPlan.(HQLQueryPlan.java:101) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.engine.query.HQLQueryPlan.(HQLQueryPlan.java:80) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:94) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1650) [hibernate-core-3.3.1.GA.jar:3.3.1.GA] at com.smallworks.dao.impl.ContactDAOImpl.getContactList(ContactDAOImpl.java:92) [ContactDAOImpl.class:na] at com.smallworks.service.impl.ContactServiceImpl.getContactList(ContactServiceImpl.java:95) [ContactServiceImpl.class:na] at com.smallworks.controller.ProjectController.addContact(ProjectController.java:117) [ProjectController.class:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [na:1.6.0_33] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) [na:1.6.0_33] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [na:1.6.0_33] at java.lang.reflect.Method.invoke(Unknown Source) [na:1.6.0_33] at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176) [spring-web-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426) [spring-webmvc-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414) [spring-webmvc-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790) [spring-webmvc-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) [spring-webmvc-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644) [spring-webmvc-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560) [spring-webmvc-3.0.5.RELEASE.jar:3.0.5.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) [servlet-api.jar:na] at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) [servlet-api.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) [catalina.jar:7.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.33] at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198) [spring-orm-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76) [spring-web-3.0.5.RELEASE.jar:3.0.5.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) [catalina.jar:7.0.33] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) [catalina.jar:7.0.33] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) [catalina.jar:7.0.33] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) [catalina.jar:7.0.33] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) [catalina.jar:7.0.33] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) [catalina.jar:7.0.33] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) [catalina.jar:7.0.33] at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:931) [catalina.jar:7.0.33] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) [catalina.jar:7.0.33] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) [catalina.jar:7.0.33] at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004) [tomcat-coyote.jar:7.0.33] at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) [tomcat-coyote.jar:7.0.33] at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) [tomcat-coyote.jar:7.0.33] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) [na:1.6.0_33] at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.6.0_33] at java.lang.Thread.run(Unknown Source) [na:1.6.0_33] 18:56:01.069 [http-bio-8080-exec-6] DEBUG osohsOpenSessionInViewFilter - Closing single Hibernate Session in OpenSessionInViewFilter 18:56:01.069 [http-bio-8080-exec-6] DEBUG osohibernate3.SessionFactoryUtils - Closing Hibernate Session
在XML映射Contact中，userSet的映射完全错误：
它应该是：
它看起来像你从用户复制粘贴这个，然后没有更新它。
为什么使用XML而不是注释？ 正如您所看到的，XML更容易出错。 此外，Hibernate应该正确默认许多这些设置。 如果你刚刚遗漏了一些这些属性，它可能会运行正常。
让我们看看我是否理解正确。 您希望“获取与登录用户关联的联系人”。 “我需要检查联系人状态……”，对吗？
如果是这种情况，请尝试反过来编写查询。 因此，您可以从此处的相同查询开始。 假设您想要“登录用户的所有状态为’ACTIVE’的联系人”。
// First, retrieve the user you want. User user = (User) session.get(User.class, user_id_you_want); // Return only the conctats with status 'ACTIVE' List result = new ArrayList(); for(Contact c : contacts){ if(c.getStatus().equals("ACTIVE")){ result.add(c); } } return result;
我希望它有帮助……
=== UPDATE1 ===
你是对的，我以为用户会有几个联系人。 如果你尝试这样的事情怎么样：
"FROM com.smallworks.model.User as u LEFT JOIN u.contacts as c WHERE u.userId=:userId AND c.status=:status"
请注意，您可以使用“FROM”而不是“SELECT”来启动语句。 请参阅本教程中的一些好例子。
另一个重要参考： http ： //docs.jboss.org/hibernate/orm/3.3/reference/en/html/queryhql.html
另外，请注意，在您的情况下，类User拥有该关系，某些语句需要考虑所有权。