hibernate中list的照射
日期：2014-05-16 浏览次数：20494 次
今天在看hibernate的帮助文档时，发现一对多，多对多，多对一关系映射中，原来list集合也是可以用的，以前只是在用set，必须要list的时候还进行转化。
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hibernate list集合使用 User-Address
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User类:
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public class User {
?private String id;
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?private String name;
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?private String password;
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?private List addressSet;
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?......
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}
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Address类：
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public class Address {
?private String id;
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?private String address;
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?private String city;
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?.....
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｝
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User.hbm.xml
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<?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="com.test.bean.User" table="t_user">
??????? <id name="id" type="java.lang.String">
??????? ?<column name="id" length="128" />
??????????? <generator class="uuid"></generator>
??????? </id>
??
??<property name="name" type="java.lang.String">
???<column name="tname"></column>
??</property>
??<property name="password" type="java.lang.String">
???<column name="tpassword"></column>
??</property>
??<!--? order-by="city"
??<set name="addressSet" table="t_add" cascade="all" lazy="false" inverse="false">
???<key column="userid"></key>
???<one-to-many class="com.test.bean.Address" />
??</set>
??-->
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??<list name="addressSet" table="t_add" cascade="all" lazy="false" inverse="false">
???<key column="userid"></key>
???<list-index column="addindex" />
???<one-to-many class="com.test.bean.Address" />
??</list>
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??? </class>
</hibernate-mapping>
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Address.hbm.xml
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<?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="com.test.bean.Address" table="t_add">
??????? <id name="id" type="java.lang.String">
??????? ?<column name="id" length="128" />
??????????? <generator class="uuid"></generator>
??????? </id>
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??<property name="address" type="java.lang.String">
???<column name="address"></column>
??</property>
??<property name="city" type="java.lang.String">
???<column name="city"></column>
??</property>
??? </class>
</hibernate-mapping>
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?这样就可以正常使用了呢...但是不知道这样做有什么弊端不..?
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