Hibernate一對多配置示例
阿新 • • 發佈：2018-12-24
客戶（一）與聯絡人（多）示例
可以通過多個聯絡人聯絡到你的客戶
表結構
customer表
CREATE TABLE `cst_customer`( `cust_id` bigint(32) NOT NULL AUTO_INCREMENT COMMENT '客戶編號(主鍵)', `cust_name` varchar(32) NOT NULL COMMENT '客戶名稱(公司名稱)', `cust_source` varchar(32) DEFAULT NULL COMMENT '客戶資訊來源', `cust_industry` varchar(32) DEFAULT NULL COMMENT '客戶所屬行業', `cust_level` varchar(32) DEFAULT NULL COMMENT '客戶級別', `cust_phone` varchar(64) DEFAULT NULL COMMENT '固定電話', `cust_mobile` varchar(16) DEFAULT NULL COMMENT '行動電話', PRIMARY KEY (`cust_id`) )ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
linkman表
CREATE TABLE `cst_linkman` ( `lkm_id` bigint(32) NOT NULL AUTO_INCREMENT COMMENT '聯絡人編號(主鍵)', `lkm_name` varchar(16) DEFAULT NULL COMMENT '聯絡人姓名', `lkm_cust_id` bigint(32) DEFAULT NULL COMMENT '客戶id', `lkm_gender` char(1) DEFAULT NULL COMMENT '聯絡人性別', `lkm_phone` varchar(16) DEFAULT NULL COMMENT '聯絡人辦公電話', `lkm_mobile` varchar(16) DEFAULT NULL COMMENT '聯絡人手機', `lkm_email` varchar(64) DEFAULT NULL COMMENT '聯絡人郵箱', `lkm_qq` varchar(16) DEFAULT NULL COMMENT '聯絡人qq', `lkm_position` varchar(16) DEFAULT NULL COMMENT '聯絡人職位', `lkm_memo` varchar(512) DEFAULT NULL COMMENT '聯絡人備註', PRIMARY KEY (`lkm_id`), KEY `FK_cst_linkman_lkm_cust_id` (`lkm_cust_id`), CONSTRAINT `FK_cst_linkman_lkm_cust_id` FOREIGN KEY (`lkm_cust_id`) REFERENCES `cst_customer` (`cust_id`) ON DELETE NO ACTION ON UPDATE NO ACTION ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
類程式碼
Cusotmer類
package com.itykd.domain; import java.util.HashSet; import java.util.Set; public class Customer { private Long cust_id; private String cust_name; private String cust_source; private String cust_industry; private String cust_level; private String cust_phone; private String cust_mobile; private Set<LinkMan> linkMans = new HashSet<>(); public Customer() { super(); // TODO Auto-generated constructor stub } public Long getCust_id() { return cust_id; } public void setCust_id(Long cust_id) { this.cust_id = cust_id; } public String getCust_name() { return cust_name; } public void setCust_name(String cust_name) { this.cust_name = cust_name; } public String getCust_source() { return cust_source; } public void setCust_source(String cust_source) { this.cust_source = cust_source; } public String getCust_industry() { return cust_industry; } public void setCust_industry(String cust_industry) { this.cust_industry = cust_industry; } public String getCust_level() { return cust_level; } public void setCust_level(String cust_level) { this.cust_level = cust_level; } public String getCust_phone() { return cust_phone; } public void setCust_phone(String cust_phone) { this.cust_phone = cust_phone; } public String getCust_mobile() { return cust_mobile; } public void setCust_mobile(String cust_mobile) { this.cust_mobile = cust_mobile; } public Set<LinkMan> getLinkMans() { return linkMans; } public void setLinkMans(Set<LinkMan> linkMans) { this.linkMans = linkMans; } }
LinkMan類
package com.itykd.domain;
public class LinkMan {
private Long lkm_id;
private String lkm_name;
private Long lkm_cust_id;
private String lkm_gender;
private String lkm_phone;
private String lkm_mobile;
private String lkm_email;
private String lkm_qq;
private String lkm_position;
private String lkm_memo;
private Customer customer;
public LinkMan() {
super();
// TODO Auto-generated constructor stub
}
public Long getLkm_id() {
return lkm_id;
}
public void setLkm_id(Long lkm_id) {
this.lkm_id = lkm_id;
}
public String getLkm_name() {
return lkm_name;
}
public void setLkm_name(String lkm_name) {
this.lkm_name = lkm_name;
}
public Long getLkm_cust_id() {
return lkm_cust_id;
}
public void setLkm_cust_id(Long lkm_cust_id) {
this.lkm_cust_id = lkm_cust_id;
}
public String getLkm_gender() {
return lkm_gender;
}
public void setLkm_gender(String lkm_gender) {
this.lkm_gender = lkm_gender;
}
public String getLkm_phone() {
return lkm_phone;
}
public void setLkm_phone(String lkm_phone) {
this.lkm_phone = lkm_phone;
}
public String getLkm_mobile() {
return lkm_mobile;
}
public void setLkm_mobile(String lkm_mobile) {
this.lkm_mobile = lkm_mobile;
}
public String getLkm_email() {
return lkm_email;
}
public void setLkm_email(String lkm_email) {
this.lkm_email = lkm_email;
}
public String getLkm_qq() {
return lkm_qq;
}
public void setLkm_qq(String lkm_qq) {
this.lkm_qq = lkm_qq;
}
public String getLkm_position() {
return lkm_position;
}
public void setLkm_position(String lkm_position) {
this.lkm_position = lkm_position;
}
public String getLkm_memo() {
return lkm_memo;
}
public void setLkm_memo(String lkm_memo) {
this.lkm_memo = lkm_memo;
}
public Customer getCustomer() {
return customer;
}
public void setCustomer(Customer customer) {
this.customer = customer;
}
}一對多的時候，作為一的一方（Customer）要建立多的一方（LinkMan）的一個集合屬性，而多的一方（LinkMan）要建立一的一方（Customer）的一個唯一屬性；
Mapper.hbm.xml
Customer.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 2018-11-20 16:04:05 by Hibernate Tools 3.5.0.Final -->
<hibernate-mapping>
<!--將實體的資料與表的資料相關連，即orm的一個聯絡 -->
<class name="com.itykd.domain.Customer" table="cst_customer">
<id name="cust_id" column="cust_id">
<!-- 主鍵生成策略-->
<generator class="native"/>
</id>
<!-- 除了主鍵之外其他屬性的對應關係 -->
<property name="cust_name" column="cust_name"></property>
<property name="cust_source" column="cust_source"></property>
<property name="cust_industry" column="cust_industry"></property>
<property name="cust_level" column="cust_level"></property>
<property name="cust_phone" column="cust_phone"></property>
<property name="cust_mobile" column="cust_mobile"></property>
<set name="linkMans" cascade="save-update">
<key>
<column name="lkm_cust_id"/>
</key>
<one-to-many class="com.itykd.domain.LinkMan" />
</set>
</class>
</hibernate-mapping>LinkMan.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 2018-11-21 11:05:53 by Hibernate Tools 3.5.0.Final -->
<hibernate-mapping>
<class name="com.itykd.domain.LinkMan" table="LINKMAN">
<id name="lkm_id" column="lkm_id">
<generator class="native" />
</id>
<property name="lkm_name"/>
<property name="lkm_gender"/>
<property name="lkm_phone"/>
<property name="lkm_mobile"/>
<property name="lkm_email"/>
<property name="lkm_qq"/>
<property name="lkm_position"/>
<property name="lkm_memo"/>
<many-to-one name="customer" class="com.itykd.domain.Customer" column="lkm_cust_id"/>
</class>
</hibernate-mapping>示例程式碼
package com.itykd.util;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtils {
public static final Configuration HIBERNATE_CONFIGURATION;
public static final SessionFactory SESSION_FACTORY;
static {
HIBERNATE_CONFIGURATION = new Configuration().configure();
SESSION_FACTORY = HIBERNATE_CONFIGURATION.buildSessionFactory();
}
public static Session openSession() {
return SESSION_FACTORY.openSession();
}
public static Session getCurrentSession() {
return SESSION_FACTORY.getCurrentSession();
}
} package com.itykd.demo;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.junit.Test;
import com.itykd.domain.Customer;
import com.itykd.domain.LinkMan;
import com.itykd.domain.Role;
import com.itykd.domain.User;
import com.itykd.util.HibernateUtils;
public class HibernateDemo {
@Test
public void cascadeAddOperationByCusotmer() {
Session session = HibernateUtils.getCurrentSession();
Transaction tx = session.beginTransaction();
Customer customer1 = new Customer();
customer1.setCust_name("wade");
LinkMan linkMan1 = new LinkMan();
linkMan1.setLkm_name("anta");
LinkMan linkMan2 = new LinkMan();
linkMan2.setLkm_name("tebu");
customer1.getLinkMans().add(linkMan1);
customer1.getLinkMans().add(linkMan2);
session.save(customer1);
tx.commit();
}
}