Hibernate联合主键 以及根据联合主键中字段查询

hibernate里联合主键配置

1. <hibernate-mapping package="com.boise">  
2.     <class name="PropertyFileBsline" table="property_file_bsline">  
3.        <composite-id name="Id" class="PropertyFileBslinePK">  
4.           <key-property name="Bslineid" column="bslineid" type="string"/>  
5.           <key-property name="Bslinepropertyid" column="bslinepropertyid"  
6.     type="string"/>  
7.        </composite-id>  
8.        <property   
9.           name="Bslinepropertyname"  
10.           column="bslinepropertyname"  
11.           type="string"  
12.           not-null="true"  
13.           length="20"/>  
14.        <property  
15.           name="Bslinepropertytype"  
16.           column="bslinepropertytype"  
17.           type="string"  
18.           not-null="true"  
19.           length="20"/>  
20.        <property  
21.           name="Flag"   
22.           column="flag"  
23.           type="string"  
24.           not-null="true"  
25.          length="10"/>  
26.     </class>     
27. </hibernate-mapping>  

Hibernate生成的主键类

1. public class PropertyFileBslinePK extends BasePropertyFileBslinePK {   
2.     private static final long serialVersionUID = 1L;   
3.   
4. /*[CONSTRUCTOR MARKER BEGIN]*/  
5.     public PropertyFileBslinePK () {}   
6.        
7.     public PropertyFileBslinePK (   
8.          java.lang.String bslineid,   
9.          java.lang.String bslinepropertyid) {   
10.   
11.         super (   
12.              bslineid,   
13.              bslinepropertyid);   
14.      }   
15. /*[CONSTRUCTOR MARKER END]*/  
16.   
17. } 
    

查询单个主键时用HQL语句

1. from PropertyFileBsline a where a.id.bslineid =?  

from PropertyFileBsline a where a.id.bslineid =?
结果报错:
NoClassDefFoundError: org/hibernate/exception/DataException
上网查了一下,说是hql语句的问题.
测试了大半天结果调试正常了,原来是a.id.bslineid =?中的bslineid 要写映射xml中的name,不能写PK类中的属性.
正确的HQL:

1. from PropertyFileBsline a where a.id.Bslineid =?  

from PropertyFileBsline a where a.id.Bslineid =?