1 最后生成具有复合主键的表
数据库表的主键由两个及以上的字段组成
create table people(
name varchar(20),
type varchar(20),
age int(11),
primary key (name,type)
);
2 People.hbm.xml文件
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com">
<class name="People" table="people">
<composite-id name="peopleKey" class="com.PeoplePK">
<key-property name="name" />
<key-property name="type" />
</composite-id>
<property name="age" column="age" />
</class>
</hibernate-mapping>
3 配置映射
<mapping resource="com/People.hbm.xml" />
4 java类
- People.java
package com;
public class People {
PeoplePK peopleKey = new PeoplePK();
private int age;
public PeoplePK getPeopleKey() {
return peopleKey;
}
public void setPeopleKey(PeoplePK peopleKey) {
this.peopleKey = peopleKey;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
主键类
package com;
public class PeoplePK implements java.io.Serializable {
private String name;
private String type;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String type() {
return type;
}
public void setType(String type) {
this.type = type;
}
public boolean equals(Object obj) {
...
}
public int hashCode() {
...
}
}
5 action中联合主键赋值方式
（1）
People people = new People();
people.getPeopleKey.setName("黎明");
people.getPeopleKey.setType("男");
（2）
People people = new People();
PeopleKey peopleKey = new PeopleKey("黎明","男");
people.setPeopleKey(peopleKey);