INNER JOIN不在hibernate中工作？

Question

我有一個oneToMany電影和演員表之間的關聯和ManyToOne關聯反向的方式。一個JOIN可以工作，但是當我在JOIN中有一個篩選子句時，它會失敗。請在上面的註釋中找到相關的代碼部分。

我已閱讀此職位。但是，這並沒有幫助 Join Query not working in Hibernate

這裏有我的實​​體的相關部分：

@Entity 
public class Movie { 
    ...... 
    @OneToMany(mappedBy="movie",fetch=FetchType.EAGER,cascade=CascadeType.ALL) 
    private Set<Actor> actors=new HashSet<>(); 
    //getters and setters 
} 

@Entity 
public class Actor { 
    ..... 
    @ManyToOne(fetch=FetchType.EAGER) 
    @JoinColumn(name="ACTOR_MOVIE") 
    //getters and setters 
} 

這裏是我HibernateTest類：

public class HibernateTest { 

    public static void main(String[] args) { 
     Movie movie1 = new Movie("Mr and Mrs.Smith", new Date(2005, 6, 5)); 
     Actor actor3=new Actor("Brad"); 
     actor3.setMovie(movie1); 
     Actor actor4=new Actor("Joe"); 
     actor4.setMovie(movie1); 
     movie1.getActors().add(actor3); 
     movie1.getActors().add(actor4); 

     Movie movie = new Movie("Titanic", new Date(1997,12,19)); 
     Actor actor1=new Actor("Leo"); 
     Actor actor2=new Actor("Kate"); 
     actor1.setMovie(movie); 
     actor2.setMovie(movie); 
     movie.getActors().add(actor1); 
     movie.getActors().add(actor2); 

     SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory(); 
     Session session = sessionFactory.openSession(); 
     session.beginTransaction(); 
     session.persist(movie); 
     session.persist(movie1); 

     session.getTransaction().commit(); 
     session.close(); 

     session = sessionFactory.openSession(); 
     session.beginTransaction(); 

     //The following query works 
     //List<Object[]> actor_from_movies=session.createQuery("select m.name,act.name from Movie m INNER JOIN m.actors act").list(); 

     //This throws error   
     List<Object[]> actor_from_movies=session.createQuery("select m.name,act.name from Movie m INNER JOIN m.actors act" 
       + "where act.name=:acname").setParameter("acname", "Brad").list(); 

     System.out.println("actor_from_movies "+ actor_from_movies); 

     session.getTransaction().commit(); 
    session.close(); 
} 
} 

錯誤消息：

Sep 30, 2014 11:08:42 AM org.hibernate.hql.internal.ast.ErrorCounter reportError 
ERROR: line 1:92: unexpected token: act 
Sep 30, 2014 11:08:42 AM org.hibernate.hql.internal.ast.ErrorCounter reportError 
ERROR: line 1:92: unexpected token: act 
line 1:92: unexpected token: act 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.fromJoin(HqlBaseParser.java:1727) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.fromClause(HqlBaseParser.java:1380) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.selectFrom(HqlBaseParser.java:1086) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.queryRule(HqlBaseParser.java:731) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.selectStatement(HqlBaseParser.java:323) 
    at org.hibernate.hql.internal.antlr.HqlBaseParser.statement(HqlBaseParser.java:186) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:295) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:203) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:158) 
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:126) 
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:88) 
    at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:167) 
    at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:301) 
    at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236) 
    at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1800) 
    at com.example.hibernate.HibernateTest.main(HibernateTest.java:142) 

Exception in thread "main" org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected token: act near line 1, column 92 [select m.name,act.name from com.example.hibernate.dto.Movie m INNER JOIN m.actors actwhere act.name=:acname] 
    at org.hibernate.hql.internal.ast.QuerySyntaxException.convert(QuerySyntaxException.java:91) 
    at org.hibernate.hql.internal.ast.ErrorCounter.throwQueryException(ErrorCounter.java:109) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:304) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:203) 
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:158) 
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:126) 
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:88) 
    at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:167) 
    at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:301) 
    at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:236) 
    at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1800) 
    at com.example.hibernate.HibernateTest.main(HibernateTest.java:142) 

Answer 1

在之前添加一個空白：

" where act.name=:acname").