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spring+hibernate1对1关联中classcastexception


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spring+hibernate1对1关联中classcastexception
发表于：2007-06-05 15:38:54 楼主
客户表,定单表和定单明细表,客户表和定单表单向1对多,定单表和定单明细表1对1....我在添加定单表的时候怎么老是报这个错java.lang.classcastexception:   java.util.hashset    

customer:  
public   class   cusinfo   {  
private   long   id;  
private   string   cid;  
private   string   cpwd;  
private   string   csex;  
private   string   caddress;  
private   set   order;  
public   string   getcaddress（)   {  
return   caddress;  
}  
public   void   setcaddress（string   caddress)   {  
this.caddress   =   caddress;  
}  
public   string   getcid（)   {  
return   cid;  
}  
public   void   setcid（string   cid)   {  
this.cid   =   cid;  
}  
public   string   getcpwd（)   {  
return   cpwd;  
}  
public   void   setcpwd（string   cpwd)   {  
this.cpwd   =   cpwd;  
}  
public   string   getcsex（)   {  
return   csex;  
}  
public   void   setcsex（string   csex)   {  
this.csex   =   csex;  
}  
public   long   getid（)   {  
return   id;  
}  
public   void   setid（long   id)   {  
this.id   =   id;  
}  
public   set   getorder（)   {  
return   order;  
}  
public   void   setorder（set   order)   {  
order   =   order;  
}  


}  

orderinfo  
public   class   orderinfo   {  
private   long   id;  
private   string   oname;  
private   cusinfo   cus;  
private   set   myorderdetail;  
public   set   getmyorderdetail（)   {  
return   myorderdetail;  
}  
public   void   setmyorderdetail（set   myorderdetail)   {  
this.myorderdetail   =   myorderdetail;  
}  
public   cusinfo   getcus（)   {  
return   cus;  
}  
public   void   setcus（cusinfo   cus)   {  
this.cus   =   cus;  
}  
public   long   getid（)   {  
return   id;  
}  
public   void   setid（long   id)   {  
this.id   =   id;  
}  
public   string   getoname（)   {  
return   oname;  
}  
public   void   setoname（string   oname)   {  
this.oname   =   oname;  
}  

}  
orderdetail  
public   class   orderdetail   {  
private   long   id;  
private   double   totalprice;  
private   long   pid;  
private   orderinfo   myorder;  
public   long   getpid（)   {  
return   pid;  
}  
public   void   setpid（long   pid)   {  
this.pid   =   pid;  
}  
public   long   getid（)   {  
return   id;  
}  
public   void   setid（long   id)   {  
this.id   =   id;  
}  
public   double   gettotalprice（)   {  
return   totalprice;  
}  
public   void   settotalprice（double   totalprice)   {  
this.totalprice   =   totalprice;  
}  
public   orderinfo   getmyorder（)   {  
return   myorder;  
}  
public   void   setmyorder（orderinfo   myorder)   {  
this.myorder   =   myorder;  
}  

}  

测试用例:  
orderopraimpl   oimpl   =   （orderopraimpl)ctx.getbean（ "orderopra ");  
orderinfo   oinfo   =   new   orderinfo（);   //创建order实例  
orderdetail   orderd   =   new   orderdetail（);//创建orderdetail实例  
orderd.setpid（getproid（ "pname ",product));  
orderd.settotalprice（20);  
set   orderds   =   new   hashset（);  
orderds.add（orderd);  
//读取客户信息  
cusopraimpl   cimpl   =   （cusopraimpl)ctx.getbean（ "cusopra ");  
long   id   =   getcusid（cid,cpwd);  
cusinfo   cus   =   （cusinfo)cimpl.loadcus（id);  
set   orderinfo   =   new   hashset（);  
orderinfo.add（oinfo);  
//将定单和客户关联  
cus.setorder（orderinfo);  
//保存order  
oinfo.setcus（cus);  
oinfo.setmyorderdetail（orderds);  
oimpl.addorder（oinfo);  

不知道为什么set   orderinfo   =   new   hashset（);会转换失败  
发表于：2007-06-05 15:40:081楼 得分:0
xml:
customer:
<hibernate-mapping>
<class   name= "vo.cusinfo "   table= "customer "   lazy= "false ">
<id   name= "id "   column= "id "   type= "java.lang.long ">
<generator   class= "increment "> </generator>
</id>
<property   name= "cid "   column= "cid "   type= "string "> </property>
<property   name= "cpwd "   column= "cpassword "   type= "string "> </property>
<property   name= "csex "   column= "csex "   type= "string "> </property>
<property   name= "caddress "   column= "caddress "   type= "string "> </property>

<set   name= "order "   cascade= "save-update "   inverse= "true ">
<key   column= "cid "> </key>
<one-to-many   class= "vo.orderinfo "/>
</set>
</class>

order:
<hibernate-mapping>
<class   name= "vo.orderinfo "   table= "orderinfo ">
<id   name= "id "   column= "id "   type= "java.lang.long ">
<generator   class= "increment "> </generator>
</id>
<property   name= "oname "   column= "ordername "   type= "string "> </property>
<many-to-one   name= "cus "   class= "vo.cusinfo "   column= "cid "   lazy= "false ">
</many-to-one>
<map   name= "myorderdetail "   table= "orderdetail "   cascade= "save-update "   inverse= "false ">
<key   column= "id "> </key>
<index   column= "orderid "   type= "java.lang.long "> </index>
<composite-element   class= "vo.orderdetail ">
<parent   name= "myorder "/>
<property   name= "totalprice "   column= "totalprice "   type= "java.lang.double "> </property>
<property   name= "pid "   column= "pid "   type= "java.lang.long "> </property>
</composite-element>
</map>
</class>
发表于：2007-06-08 19:54:362楼 得分:0
最近很忙，没有时间看你的代码不过classcastexception是一个造型异常
肯定是你add到set中的值在取出使用的时候指定的类型不一致

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