框架漫谈之hibernate(四)hibernate一对多、多对多实体类xml配置

1.数据库建表SQL

create database test_hibernate;
use test_hibernate;

/*创建客户表*/
CREATE TABLE `cst_customer` (
`cust_id` bigint(32) NOT NULL AUTO_INCREMENT COMMENT '客户编号(主键)',
`cust_name` varchar(32) NOT NULL COMMENT '客户名称(公司名称)',
`cust_source` varchar(32) DEFAULT NULL COMMENT '客户信息来源',
`cust_industry` varchar(32) DEFAULT NULL COMMENT '客户所属行业',
`cust_level` varchar(32) DEFAULT NULL COMMENT '客户级别',
`cust_address` varchar(128) DEFAULT NULL COMMENT '客户联系地址',
`cust_phone` varchar(64) DEFAULT NULL COMMENT '客户联系电话',
PRIMARY KEY (`cust_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

/*创建联系人表*/
CREATE TABLE `cst_linkman` (
`lkm_id` bigint(32) NOT NULL AUTO_INCREMENT COMMENT '联系人编号(主键)',
`lkm_name` varchar(16) DEFAULT NULL COMMENT '联系人姓名',
`lkm_gender` varchar(10) DEFAULT NULL COMMENT '联系人性别',
`lkm_phone` varchar(16) DEFAULT NULL COMMENT '联系人办公电话',
`lkm_mobile` varchar(16) DEFAULT NULL COMMENT '联系人手机',
`lkm_email` varchar(64) DEFAULT NULL COMMENT '联系人邮箱',
`lkm_position` varchar(16) DEFAULT NULL COMMENT '联系人职位',
`lkm_memo` varchar(512) DEFAULT NULL COMMENT '联系人备注',
PRIMARY KEY (`lkm_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

/*创建用户表*/
CREATE TABLE `sys_user` (
`user_id` bigint(32) NOT NULL AUTO_INCREMENT COMMENT '用户id',
`user_code` varchar(32) NOT NULL COMMENT '用户账号',
`user_name` varchar(64) NOT NULL COMMENT '用户名称',
`user_password` varchar(32) NOT NULL COMMENT '用户密码',
`user_state` char(1) NOT NULL COMMENT '1:正常,0:暂停',
PRIMARY KEY (`user_id`)
) ENGINE=InnoDB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8;

/*创建角色表*/
create table `sys_role`(
role_id bigint(32) primary key auto_increment,
role_name varchar(100),
role_memo varchar(255)
);

/*创建用户和角色关联系表*/
CREATE TABLE `sys_user_role` (
`role_id` bigint(32) NOT NULL COMMENT '角色id',
`user_id` bigint(32) NOT NULL COMMENT '用户id',
PRIMARY KEY (`role_id`,`user_id`),
KEY `FK_user_role_user_id` (`user_id`),
CONSTRAINT `FK_user_role_role_id` FOREIGN KEY (`role_id`) REFERENCES `sys_role` (`role_id`) ON DELETE NO ACTION ON UPDATE NO ACTION,
CONSTRAINT `FK_user_role_user_id` FOREIGN KEY (`user_id`) REFERENCES `sys_user` (`user_id`) ON DELETE NO ACTION ON UPDATE NO ACTION
)

2.客户联系人一对多

/**
* 客户的实体类
* @author ZhuPengWei
*/
public class Customer implements Serializable {

private Long custId;
private String custName;
private String custSource;
private String custIndustry;
private String custLevel;
private String custAddress;
private String custPhone;
//一对多关系映射：一个客户可以包含多个联系人
private Set<LinkMan> linkmans = new HashSet<LinkMan>(0);
//提供对外访问的setter,getter
.......
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="test.domain">
<class name="Customer" table="cst_customer">
<id name="custId" column="cust_id">
<generator class="native"></generator>
</id>
<property name="custName" column="cust_name"></property>
<property name="custIndustry" column="cust_industry"></property>
<property name="custSource" column="cust_source"></property>
<property name="custLevel" column="cust_level"></property>
<property name="custAddress" column="cust_address"></property>
<property name="custPhone" column="cust_phone"></property>
<!-- 一对多关系映射：
涉及的标签：
set：
作用：用于映射set集合属性。
属性：
name：指定集合属性的名称
table:指定集合元素所对应的表。在一对多时，table属性可以不写。
one-to-many:
作用：指定当前映射文件所对应的实体和集合元素之间的关系是一对多。
属性：
class:指定集合元素所对应的实体类名称
key：
作用：用于映射外键的。
属性：
column：指定外键字段名称。

-->
<set name="linkmans" table="cst_linkman" >
<key column="lkm_cust_id"/>
<one-to-many class="LinkMan"/>
</set>
</class>
</hibernate-mapping>

/**
* 一个联系人的实体
* @author ZhuPengWei
*/
public class LinkMan implements Serializable {

private Long lkmId;
private String lkmName;
private String lkmGender;
private String lkmPhone;
private String lkmMobile;
private String lkmEmail;
private String lkmPosition;
private String lkmMemo;

//多对一关系映射：多个联系人对应一个客户
private Customer customer;
//提供对外访问的setter,getter
.......
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="test.domain">
<class name="LinkMan" table="cst_linkman">
<id name="lkmId" column="lkm_id">
<generator class="native"></generator>
</id>
<property name="lkmName" column="lkm_name"></property>
<property name="lkmGender" column="lkm_gender"></property>
<property name="lkmPhone" column="lkm_phone"></property>
<property name="lkmMobile" column="lkm_mobile"></property>
<property name="lkmEmail" column="lkm_email"></property>
<property name="lkmPosition" column="lkm_position"></property>
<property name="lkmMemo" column="lkm_memo"></property>

<!-- 多对一关系映射
涉及的标签：
many-to-one
作用：用于映射多对一的关系
属性：
name：指的实体类中引用客户实体的属性名称
column：指的是从表中外键字段的名称
class：指定的是属性所对应的实体类
-->
<many-to-one name="customer" class="Customer" column="lkm_cust_id"></many-to-one>

</class>
</hibernate-mapping>

3.用户角色多对多

/**
* 角色的实体类
* @author ZhuPengWei
*/
public class SysRole implements Serializable {

private Long roleId;
private String roleName;
private String roleMemo;

//多对多关系映射：一个角色可以赋予多个用户
private Set<SysUser> users = new HashSet<SysUser>(0);
//对外提供setter,getter
.......
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="test.domain">
<class name="SysRole" table="sys_role">
<id name="roleId" column="role_id">
<generator class="native"></generator>
</id>
<property name="roleName" column="role_name"></property>
<property name="roleMemo" column="role_memo"></property>
<!-- 多对多关系映射 -->
<set name="users" table="user_role_ref"  >
<key column="role_id"/>
<many-to-many class="SysUser" column="user_id"/>
</set>
</class>
</hibernate-mapping>

/**
* 一个用户实体
* @author ZhuPengWei
*/
public class SysUser implements Serializable {

private Long userId;
private String userCode;
private String userName;
private String userPassword;
private String userState;

//多对多关系映射：一个用户可以有多个角色
private Set<SysRole> roles = new HashSet<SysRole>(0);
//对外提供setter,getter
.......
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="test.domain">
<class name="SysUser" table="sys_user">
<id name="userId" column="user_id">
<generator class="native"></generator>
</id>
<property name="userCode" column="user_code"></property>
<property name="userName" column="user_name"></property>
<property name="userPassword" column="user_password"></property>
<property name="userState" column="user_state"></property>
<!-- 多对多的关系映射   -->
<set name="roles" table="user_role_ref" >
<key column="user_id"/>
<many-to-many class="SysRole" column="role_id"/>
</set>
</class>
</hibernate-mapping>