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实体之间有三种关系:
1.一对一
2.一对多
3.多对一
一对多
goods类
package entity;
/*
* 货物表
* */
public class goods {
private int gid;
private long gnum;
private inventory inv;
public int getGid() {
return gid;
}
public void setGid(int gid) {
this.gid = gid;
}
public long getGnum() {
return gnum;
}
public void setGnum(long gnum) {
this.gnum = gnum;
}
public inventory getInv() {
return inv;
}
public void setInv(inventory inv) {
this.inv = inv;
}
}
配置
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="entity.goods" table="goods">
<id name="gid" column="gid">
<generator class="native"/>
</id>
<property name="gnum" column="gnum"></property>
<many-to-one name="inv" column="igid" class="entity.inventory"></many-to-one>
<!--
<many-to-one>标签
name :关联对象的属性的名称.
column :表中的外键名称.
class :关联对象类的全路径
-->
</class>
</hibernate-mapping>
inventory类
package entity;
import java.util.HashSet;
import java.util.Set;
/*
* 清单表
* */
public class inventory {
private int iid;
private String iname;
//private int igid;
private Set<goods> goodses=new HashSet<goods>();
public int getIid() {
return iid;
}
public void setIid(int iid) {
this.iid = iid;
}
public String getIname() {
return iname;
}
public void setIname(String iname) {
this.iname = iname;
}
//public int getIgid() {
//return igid;
//}
//public void setIgid(int igid) {
//this.igid = igid;
//}
public Set<goods> getGoodses() {
return goodses;
}
public void setGoodses(Set<goods> goodses) {
this.goodses = goodses;
}
}
配置
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="entity.inventory" table="inventory">
<id name="iid" column="iid">
</id>
<property name="iname" column="iname"></property>
<!-- <property name="igid" column="igid"></property> -->
<set name="goodses">
<key column="igid"></key>
<one-to-many class="entity.goods"/>
</set>
</class>
</hibernate-mapping>
<!--
<many-to-one>标签
name :关联对象的属性的名称.
column :表中的外键名称.
class :关联对象类的全路径
-->
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原文地址：http://www.cnblogs.com/longlinxie/p/5628333.html
