联合主键时,先做一个联合主键类:
import?java.io.Serializable;
public?class?NamePK?implements?Serializable{?
????//主键类private?static?final?long?serialVersionUID?=?8313037022835155821L;
????private?String?firstName;
????private?String?lastName;
????//?getter/setter方法略...你的实体类,假设是UserInfo,就这么写了:
public?class?UserInfo?{
????private?NamePK?namePk;
????private?String?sex;
????private?int?age;
???//?getter/setter方法略...
}配置映射文件UserInfo.hbm.xml的关键部分应该这么写:
???<composite-id?name="namePk">
???????<key-property?name="firstName"?column="first_name"?length="12"/>
???????<key-property?name="lastName"?column="last_name"?length="12"/>
???</composite-id>
然后,查询时就对上面的类对象进行赋值,然后用session的get, load方法查:
?????NamePK?namePk?=?new?NamePK();
??????namePk.setFirstName("Zhang");
??????namePk.setLastName("san");
??????UserInfo?ui?=?(UserInfo)?session.get(UserInfo.class,?namePk);?
??????System.out.println(ui.getAge());
??????System.out.println(ui.getSex());
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