hibernate单向一对多关联

有这样一个应用场景，有一张用户表(APM_USER），一张部门表(APM_DEPT)。用户和部门之间的关系是多对一（many to one)。考虑到其他一些特殊情况。虽然实际情况，部门对用户是多对一（many to one)。实际上，删除一个部门的时候，为保险起见，不需要级联删除用户信息，查出部门对联时，也不需要查出部门内的所有员工。因此做成了单向多对一关联。

具体建表SQL如下：

 

-- Create table
create table APM_USER
(
  USER_ID      VARCHAR2(18) not null,
  USER_NAME    VARCHAR2(300),
  DEPT_ID      VARCHAR2(18),
  USER_PASS    VARCHAR2(300),
  USER_STATUS  VARCHAR2(20),
  EMAIL        VARCHAR2(300),
  MOBILE_PHONE VARCHAR2(300),
  FCU          VARCHAR2(18),
  FCD          VARCHAR2(18),
  FCT          VARCHAR2(20),
  LUU          VARCHAR2(18),
  LUD          VARCHAR2(18),
  LUT          VARCHAR2(20)
)
tablespace AMSTBS
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );
-- Add comments to the columns 
comment on column APM_USER.USER_ID
  is '用户编号';
comment on column APM_USER.USER_NAME
  is '用户名称';
comment on column APM_USER.DEPT_ID
  is '所在部门';
comment on column APM_USER.USER_PASS
  is '用户密码';
comment on column APM_USER.USER_STATUS
  is '用户状态';
comment on column APM_USER.EMAIL
  is '邮件地址';
comment on column APM_USER.MOBILE_PHONE
  is '手机号';
comment on column APM_USER.FCU
  is '登记人';
comment on column APM_USER.FCD
  is '登记部门';
comment on column APM_USER.FCT
  is '登记时间';
comment on column APM_USER.LUU
  is '更新人';
comment on column APM_USER.LUD
  is '更新部门';
comment on column APM_USER.LUT
  is '更新时间';
-- Create/Recreate primary, unique and foreign key constraints 
alter table APM_USER
  add constraint PK_APM_USER primary key (USER_ID)
  using index 
  tablespace AMSTBS
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );
alter table APM_USER
  add constraint FK_APM_USER_REFERENCE_APM_DEPT foreign key (DEPT_ID)
  references APM_DEPT (DEPT_ID);
-- Create table
create table APM_DEPT
(
  DEPT_ID     VARCHAR2(18) not null,
  DEPT_NAME   VARCHAR2(300),
  DEPT_LEVEL  INTEGER,
  DEPT_STATUS VARCHAR2(20),
  FCU         VARCHAR2(18),
  FCD         VARCHAR2(18),
  FCT         VARCHAR2(20),
  LUU         VARCHAR2(18),
  LUD         VARCHAR2(18),
  LUT         VARCHAR2(20)
)
tablespace AMSTBS
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );
-- Add comments to the columns 
comment on column APM_DEPT.DEPT_ID
  is '部门号';
comment on column APM_DEPT.DEPT_NAME
  is '部门名';
comment on column APM_DEPT.DEPT_LEVEL
  is '部门级别';
comment on column APM_DEPT.DEPT_STATUS
  is '部门状态';
comment on column APM_DEPT.FCU
  is '登记人';
comment on column APM_DEPT.FCD
  is '登记部门';
comment on column APM_DEPT.FCT
  is '登记时间';
comment on column APM_DEPT.LUU
  is '更新人';
comment on column APM_DEPT.LUD
  is '更新部门';
comment on column APM_DEPT.LUT
  is '更新时间';
-- Create/Recreate primary, unique and foreign key constraints 
alter table APM_DEPT
  add constraint PK_APM_DEPT primary key (DEPT_ID)
  using index 
  tablespace AMSTBS
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );

 

 

hibernate映射文件配置如下：

<?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 2015-3-13 8:24:33 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
    <class name="com.amarsoft.apm.model.User" table="APM_USER">
        <id name="userId" type="string">
            <column name="USER_ID" length="18" />
            <generator class="assigned" />
        </id>
        <!-- 单向一对多关联，不作级联删除或更新操作，对部门实体的操作，还是手动进行。查出用户对象的同时，一定要查出部门对象 -->
        <many-to-one name="dept" class="com.amarsoft.apm.model.Dept" fetch="select" cascade="none" lazy="false">
            <column name="DEPT_ID" length="18">
            </column>
        </many-to-one>
        <property name="userName" type="string">
            <column name="USER_NAME" length="300">
            </column>
        </property>
        <property name="userPass" type="string">
            <column name="USER_PASS" length="300">
            </column>
        </property>
        <property name="userStatus" type="string">
            <column name="USER_STATUS" length="20">
            </column>
        </property>
        <property name="email" type="string">
            <column name="EMAIL" length="300">
            </column>
        </property>
        <property name="mobilePhone" type="string">
            <column name="MOBILE_PHONE" length="300">
            </column>
        </property>
        <property name="fcu" type="string">
            <column name="FCU" length="18">
            </column>
        </property>
        <property name="fcd" type="string">
            <column name="FCD" length="18">
            </column>
        </property>
        <property name="fct" type="string">
            <column name="FCT" length="20">
            </column>
        </property>
        <property name="luu" type="string">
            <column name="LUU" length="18">
            </column>
        </property>
        <property name="lud" type="string">
            <column name="LUD" length="18">
            </column>
        </property>
        <property name="lut" type="string">
            <column name="LUT" length="20">
            </column>
        </property>
    </class>
</hibernate-mapping>

<?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 2015-3-13 8:24:33 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
    <class name="com.amarsoft.apm.model.Dept" table="APM_DEPT">
        <id name="deptId" type="string">
            <column name="DEPT_ID" length="18" />
            <generator class="assigned" />
        </id>
        <property name="deptName" type="string">
            <column name="DEPT_NAME" length="300">
            </column>
        </property>
        <property name="deptLevel" type="big_decimal">
            <column name="DEPT_LEVEL" precision="22" scale="0">
            </column>
        </property>
        <property name="deptStatus" type="string">
            <column name="DEPT_STATUS" length="20">
            </column>
        </property>
        <property name="fcu" type="string">
            <column name="FCU" length="18">
            </column>
        </property>
        <property name="fcd" type="string">
            <column name="FCD" length="18">
            </column>
        </property>
        <property name="fct" type="string">
            <column name="FCT" length="20">
            </column>
        </property>
        <property name="luu" type="string">
            <column name="LUU" length="18">
            </column>
        </property>
        <property name="lud" type="string">
            <column name="LUD" length="18">
            </column>
        </property>
        <property name="lut" type="string">
            <column name="LUT" length="20">
            </column>
        </property>
    </class>
</hibernate-mapping>

 

用户类，部门类代码如下：

package com.amarsoft.apm.model;

/**
 * 用户类
 * @author yangsong
 *
 */
public class User implements java.io.Serializable {

	private static final long serialVersionUID = 3393279804743607950L;
	
	private String userId;
	private Dept dept;
	private String userName;
	private String userPass;
	private String userStatus;
	private String email;
	private String mobilePhone;
	private String fcu;
	private String fcd;
	private String fct;
	private String luu;
	private String lud;
	private String lut;

	public User() {
	}

	public User(String userId) {
		this.userId = userId;
	}

	public User(String userId, Dept dept, String userName, String userPass,
			String userStatus, String email, String mobilePhone, String fcu,
			String fcd, String fct, String luu, String lud, String lut) {
		this.userId = userId;
		this.dept = dept;
		this.userName = userName;
		this.userPass = userPass;
		this.userStatus = userStatus;
		this.email = email;
		this.mobilePhone = mobilePhone;
		this.fcu = fcu;
		this.fcd = fcd;
		this.fct = fct;
		this.luu = luu;
		this.lud = lud;
		this.lut = lut;
	}

	public String getUserId() {
		return this.userId;
	}

	public void setUserId(String userId) {
		this.userId = userId;
	}

	public Dept getDept() {
		return this.dept;
	}

	public void setDept(Dept dept) {
		this.dept = dept;
	}

	public String getUserName() {
		return this.userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public String getUserPass() {
		return this.userPass;
	}

	public void setUserPass(String userPass) {
		this.userPass = userPass;
	}

	public String getUserStatus() {
		return this.userStatus;
	}

	public void setUserStatus(String userStatus) {
		this.userStatus = userStatus;
	}

	public String getEmail() {
		return this.email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getMobilePhone() {
		return this.mobilePhone;
	}

	public void setMobilePhone(String mobilePhone) {
		this.mobilePhone = mobilePhone;
	}

	public String getFcu() {
		return this.fcu;
	}

	public void setFcu(String fcu) {
		this.fcu = fcu;
	}

	public String getFcd() {
		return this.fcd;
	}

	public void setFcd(String fcd) {
		this.fcd = fcd;
	}

	public String getFct() {
		return this.fct;
	}

	public void setFct(String fct) {
		this.fct = fct;
	}

	public String getLuu() {
		return this.luu;
	}

	public void setLuu(String luu) {
		this.luu = luu;
	}

	public String getLud() {
		return this.lud;
	}

	public void setLud(String lud) {
		this.lud = lud;
	}

	public String getLut() {
		return this.lut;
	}

	public void setLut(String lut) {
		this.lut = lut;
	}

}


package com.amarsoft.apm.model;


import java.math.BigDecimal;

/**
 * 部门类
 * @author yangsong
 *
 */
public class Dept implements java.io.Serializable {

	private static final long serialVersionUID = -1210910164577152302L;
	private String deptId;
	private String deptName;
	private BigDecimal deptLevel;
	private String deptStatus;
	private String fcu;
	private String fcd;
	private String fct;
	private String luu;
	private String lud;
	private String lut;

	public Dept() {
	}

	public Dept(String deptId) {
		this.deptId = deptId;
	}

	public Dept(String deptId, String deptName, BigDecimal deptLevel,
			String deptStatus, String fcu, String fcd, String fct, String luu,
			String lud, String lut) {
		this.deptId = deptId;
		this.deptName = deptName;
		this.deptLevel = deptLevel;
		this.deptStatus = deptStatus;
		this.fcu = fcu;
		this.fcd = fcd;
		this.fct = fct;
		this.luu = luu;
		this.lud = lud;
		this.lut = lut;
	}

	public String getDeptId() {
		return this.deptId;
	}

	public void setDeptId(String deptId) {
		this.deptId = deptId;
	}

	public String getDeptName() {
		return this.deptName;
	}

	public void setDeptName(String deptName) {
		this.deptName = deptName;
	}

	public BigDecimal getDeptLevel() {
		return this.deptLevel;
	}

	public void setDeptLevel(BigDecimal deptLevel) {
		this.deptLevel = deptLevel;
	}

	public String getDeptStatus() {
		return this.deptStatus;
	}

	public void setDeptStatus(String deptStatus) {
		this.deptStatus = deptStatus;
	}

	public String getFcu() {
		return this.fcu;
	}

	public void setFcu(String fcu) {
		this.fcu = fcu;
	}

	public String getFcd() {
		return this.fcd;
	}

	public void setFcd(String fcd) {
		this.fcd = fcd;
	}

	public String getFct() {
		return this.fct;
	}

	public void setFct(String fct) {
		this.fct = fct;
	}

	public String getLuu() {
		return this.luu;
	}

	public void setLuu(String luu) {
		this.luu = luu;
	}

	public String getLud() {
		return this.lud;
	}

	public void setLud(String lud) {
		this.lud = lud;
	}

	public String getLut() {
		return this.lut;
	}

	public void setLut(String lut) {
		this.lut = lut;
	}

}

  

测试代码如下：

@Test
	public void testUser(){
		DateFormat df = new SimpleDateFormat("yyy/MM/dd HH:mm:ss");
		try {
			Configuration configuration = new Configuration();
			configuration.configure("hibernate.cfg.xml");
			SessionFactory sf = configuration.buildSessionFactory();
			Session session = sf.openSession();
			Transaction tx = session.beginTransaction();
			
			//新增测试
			User user = new User();
			user.setUserId("demo001");
			user.setUserName("示例测试");
			user.setFct(df.format(new Date()));
			Dept dept = new Dept();
			dept.setDeptId("10");
			dept.setDeptName("示例总部");
			dept.setFct(df.format(new Date()));
			user.setDept(dept);
			
			session.saveOrUpdate(dept);//部门对象自行保存，防止通过user对象级联后被篡改
			session.saveOrUpdate(user);
			
			//查询实体
			String hql = "from User where userId=:userId";
			Query query=session.createQuery(hql);
			query.setString("userId", user.getUserId());
			User user1 = (User)query.uniqueResult();
			Assert.assertNotNull(user1);
			Assert.assertEquals(user.getUserName(), user1.getUserName());
			Assert.assertNotNull(user1.getDept());
			Assert.assertEquals(user.getDept().getDeptName(), user1.getDept().getDeptName());
			
			tx.commit();
			session.close();

		} catch (HibernateException e) {
			e.printStackTrace();
		}		
	}

 

自己做个笔记记录下，同时，也给有需要或学习的同学参考。