Hibernate Criteria Transformers.aliasToBean没有填充正确的值

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问题描述

我试图通过加入我的实体类来创建BO

I am trying to create BO by joining my entity classes

Criteria criteria = session.createCriteria(Report.class,"r");
    criteria
    .createAlias("template", "t")
    .createAlias("constituents", "rc")
    .createAlias("rc.entity", "pe")
    .createAlias("pe.model", "m")
    .createAlias("pe.scenario", "s")
    .setProjection(Projections.projectionList()
            .add( Projections.property("r.Id"))        
            .add( Projections.property("t.Typ"))                
            .add( Projections.property("pe.bId"))               
            .add( Projections.property("m.model"))              
            .add( Projections.property("s.decay"))
      ).setMaxResults(100)
     .addOrder(Order.asc("r.Id"))
     .setResultTransformer(Transformers.aliasToBean(BO.class));

我得到100个空BO，即所有属性都为空
我的BO如下

I am getting 100 empty BO i.e. all properties are nullMy BO is as follows

public class BO implements Serializable {

private static final long serialVersionUID = 1L;
private int Id;
private String Typ;
private String bId;
private String model;
private String decay;

    Getters and Setters

.....

当我删除aliasToBean行并迭代Object []时，我可以看到正确的值提取
请引导我...

When I remove the line aliasToBean and iterate over Object[] I could see the correct values fetchedPlease guide me...

推荐答案

尝试显式地别名 ProjectionList 项以匹配bean中的字段名称，如下所示：

Try explicitly aliasing the ProjectionList items to match the field names in the bean, as follows:

Criteria criteria = session.createCriteria(Report.class,"r");
criteria
.createAlias("template", "t")
.createAlias("constituents", "rc")
.createAlias("rc.entity", "pe")
.createAlias("pe.model", "m")
.createAlias("pe.scenario", "s")
.setProjection(Projections.projectionList()
        .add( Projections.property("r.Id"), "Id")        
        .add( Projections.property("t.Typ"), "Typ")                
        .add( Projections.property("pe.bId"), "bId")               
        .add( Projections.property("m.model"), "model")              
        .add( Projections.property("s.decay"), "decay")
  ).setMaxResults(100)
 .addOrder(Order.asc("r.Id"))
 .setResultTransformer(Transformers.aliasToBean(BO.class));

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