模型user,address

address对user进行外键关联，意思就是address的主键是由user的主键关联生成的，现有user后有address

user sql语句

CREATE TABLE `NewTable` (
`userid`  int(11) NOT NULL AUTO_INCREMENT ,
`account`  varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,
`password`  varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,
PRIMARY KEY (`userid`)
)
ENGINE=InnoDB
DEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ci
AUTO_INCREMENT=6
ROW_FORMAT=COMPACT
;

address sql语句

CREATE TABLE `NewTable` (
`addressid`  int(11) NOT NULL AUTO_INCREMENT ,
`addressinfo`  varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL ,
PRIMARY KEY (`addressid`),
FOREIGN KEY (`addressid`) REFERENCES `user` (`userid`) ON DELETE RESTRICT ON UPDATE RESTRICT
)
ENGINE=InnoDB
DEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ci
AUTO_INCREMENT=6
ROW_FORMAT=COMPACT
;

user 类

package dto;import java.io.Serializable;public class User{private int userid;private String account;private String password;public int getUserid() {return userid;}public void setUserid(int userid) {this.userid = userid;}public String getAccount() {return account;}public void setAccount(String account) {this.account = account;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}
}

user.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 2015-6-17 22:15:11 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping><class name="dto.User" table="user" catalog="snlu"><id name="userid" type="java.lang.Integer" access="field"><column name="userid" /><generator class="identity" /></id><property name="account" type="string"><column name="account" /></property><property name="password" type="string"><column name="password" /></property></class>
</hibernate-mapping>

address类

package dto;public class Address {private String addressinfo;private int addressid;private User user;public User getUser() {return user;}public void setUser(User user) {this.user = user;}public String getAddressinfo() {return addressinfo;}public void setAddressinfo(String addressinfo) {this.addressinfo = addressinfo;}public int getAddressid() {return addressid;}public void setAddressid(int addressid) {this.addressid = addressid;}}

address.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 2015-6-17 22:15:11 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping><class name="dto.Address" table="address" catalog="snlu"><id name="addressid" type="java.lang.Integer" access="field"><column name="addressid" /><generator class="foreign"><param name="property">user</param></generator></id><one-to-one name="user" class="dto.User" constrained="true"></one-to-one><property name="addressinfo" type="string"><column name="addressinfo" /></property></class>
</hibernate-mapping>

注：若使用hibernate tools生成实体类xml很可能生成的为一对一主键双向关联注意查看 on-to-one标签

hibernate.cfg.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration><session-factory><property name="hibernate.bytecode.use_reflection_optimizer">false</property><property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property><property name="hibernate.connection.password">root</property><property name="hibernate.connection.url">jdbc:mysql://localhost:3306/snlu</property><property name="hibernate.connection.username">root</property><property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property><property name="hibernate.jdbc.fetch_size">5</property><property name="hibernate.max_fetch_depth">1</property><property name="hibernate.search.autoregister_listeners">false</property><property name="hibernate.show_sql">true</property><property name="hibernate.validator.apply_to_ddl">false</property><mapping resource="dto/User.hbm.xml"/><mapping resource="dto/Address.hbm.xml"/></session-factory>
</hibernate-configuration>

main

package test;import org.hibernate.Session;
import org.hibernate.Transaction;
import org.junit.Test;import util.HibernateUtil;
import dao.DAOFactory;
import dao.UserDAO;
import dao.UserDAOImpl;
import dto.Address;
import dto.User;public class UserTest {public static void main(String[] args) {Session session=HibernateUtil.getSessionFactory().openSession();Transaction tx=session.beginTransaction();User user=new User();user.setAccount("jack");user.setPassword("111111");Address a=new Address();a.setAddressinfo("america");a.setUser(user);session.save(user);session.save(a);tx.commit();HibernateUtil.closeSession();}}

hibernateUtil可在上篇文章hibernate速成中找到

注：将save(user)注释掉，只跑save(address)仍会保存user