java – Hibernate：标准与集合

我有一个hibernate和criteria的问题.我有两个班：

public class Place{
    long id;
    String name;
    Set<Street> streets;
}

public class Street{
    long id;
    String name;
    Place place;
}

我现在想编写一个方法,它返回一个名称列表的方法,名称如参数中所给出,并且一个名为“参数”的街道.

public List<Place> findplaces(String name,String streetname){
    //getSession() gives me a hibernate session
    Criteria crit = getSession().createCriteria(Place.class,"place");
    crit.add(Restrictions.like("name",name+"%"));
    //Everything works fine until here
    //Last step: Sort out all places not containing a street named like streetname + "%"
}

我尝试了最后一步的不同方法：

//streetList is a list of all streets named like streetname
crit.add(Restrictions.in("streets",streetList));

其他方式：

DetachedCriteria strasseCrit = DetachedCriteria.forClass(Street.class,"street");
streetCrit.add(Restrictions.like("street.name",streetname + "%"));
streetCrit.createalias("street.place","streetPlace");
streetCrit.add(Restrictions.eqProperty("streetPlace.id","place.id"));
streetCrit.setProjection(Projections.property("street.name"));
crit.add(Subqueries.exists(streetCrit));

最后方式：

crit.createalias("place.streets","street");
crit.add(Restrictions.like("street.name",streetname + "%"));
crit.setResultTransformer(distinctResultTransformer.INSTANCE);

我希望你能理解我的问题,抱歉我的坏英文:(

我搜索了两天的解决方案,我不知道怎么去

德国问候:)
菲利普

解决方法

public List<Place> findplaces(String name,String streetname){
    Criteria crit = getSession().createCriteria(Place.class,"place");
    criteria.createalias("streets","s");  // Create alias for streets
    crit.add(Restrictions.like("s.name",name+"%"));
    // continue method
}

原文地址：https://www.jb51.cc/java/121648.html