Hibernate 一对一关联映射对象级联增删改查示例

港控/mmm° 2022-06-07 09:18 203阅读 0赞

**这里主要用用户和身份证做示例开发,一个用户只能拥有一张身份证,一张身份证只能对应一个用户,所以二者是一对一的映射关系,这里我写一个例子,作级联增删改查操作.**

**代码:**

**\#数据模型层**

**Person.java**

package com.sunline.entity;
    
    
    
    /**
     * Person entity. @author MyEclipse Persistence Tools
     */
    
    public class Person  implements java.io.Serializable {
    
        // Fields    
    
         private Integer PId;
         private String name;
         private Card Cards;
    
    
        // Constructors
    
        /** default constructor */
        public Person() {
        }
    
    	/** minimal constructor */
        public Person(String name) {
            this.name = name;
        }
        
        /** full constructor */
        public Person(String name, Card Cards) {
            this.name = name;
            this.Cards = Cards;
        }
    
       
        // Property accessors
    
        public Integer getPId() {
            return this.PId;
        }
        
        public void setPId(Integer PId) {
            this.PId = PId;
        }
    
        public String getName() {
            return this.name;
        }
        
        public void setName(String name) {
            this.name = name;
        }
    
        public Card getCards() {
            return this.Cards;
        }
        
        public void setCards(Card Cards) {
            this.Cards = Cards;
        }
      
    }

**Person.hbm.xml**

<?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.sunline.entity.Person" table="person" catalog="association">
            <id name="PId" type="java.lang.Integer">
                <column name="p_id" />
                <generator class="increment"></generator>
            </id>
            <property name="name" type="java.lang.String">
                <column name="name" length="50" not-null="true" />
            </property>
              
            <one-to-one name="Cards" class="com.sunline.entity.Card" cascade="all" lazy="false" constrained="true"></one-to-one>
        </class>
    </hibernate-mapping>

**Card.java**

package com.sunline.entity;
    
    
    
    /**
     * Card entity. @author MyEclipse Persistence Tools
     */
    
    public class Card  implements java.io.Serializable {
    
    
        // Fields    
    
         private Integer CId;
         private String place;
         private Person Persons;
         private Integer PId;
    
    
        // Constructors
    
        /** default constructor */
        public Card() {
        }
    
    	/** minimal constructor */
        public Card(String place, Integer PId) {
            this.place = place;
            this.PId = PId;
        }
        
        /** full constructor */
        public Card(String place, Person Persons, Integer PId) {
            this.place = place;
            this.Persons = Persons;
            this.PId = PId;
        }
    
       
        // Property accessors
    
        public Integer getCId() {
            return this.CId;
        }
        
        public void setCId(Integer CId) {
            this.CId = CId;
        }
    
        public String getPlace() {
            return this.place;
        }
        
        public void setPlace(String place) {
            this.place = place;
        }
    
        public Person getPersons() {
            return this.Persons;
        }
        
        public void setPersons(Person Persons) {
            this.Persons = Persons;
        }
    
        public Integer getPId() {
            return this.PId;
        }
        
        public void setPId(Integer PId) {
            this.PId = PId;
        }
    
    }

**Card.hbm.xml**

<?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.sunline.entity.Card" table="card" catalog="association">
            <id name="CId" type="java.lang.Integer">
                <column name="c_id" />
                <generator class="increment"></generator>
            </id>
            <property name="place" type="java.lang.String">
                <column name="place" length="80" not-null="true" />
            </property>
              
            
            <many-to-one name="Persons" class="com.sunline.entity.Person" unique="true" column="p_id"></many-to-one>
            <property name="PId" type="java.lang.Integer" insert="false" update="false">
                <column name="p_id" not-null="true"/>
            </property>
        </class>
    </hibernate-mapping>

**\#数据访问层**

**PersonDao.java**

package com.sunline.dao;
    
    import javax.annotation.Resource;
    
    import org.hibernate.SessionFactory;
    import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
    import org.springframework.stereotype.Repository;
    
    import com.sunline.entity.Person;
    @Repository(value="personDao")
    public class PersonDao extends HibernateDaoSupport {
    	/*
    	 * 使用注解必须添加以下方式
    	 */
        @Resource  
        public void setSessionFacotry(SessionFactory sessionFacotry) {  
            super.setSessionFactory(sessionFacotry);  
        } 
        
    	/*
    	 * 添加人员
    	 */
        public void AddPerson(Person person){
    	    System.out.println("成功添加人员信息");
    		this.getHibernateTemplate().save(person);
        }
        
    	/*
    	 * 查询id为XX的所有人员和证件信息
    	 */
    	public Person findById(int id) {
    		Person person=(Person)this.getHibernateTemplate().get(Person.class,id);
    		return person;
    	}
    	
    	/*
    	 * 修改个人信息
    	 */
    	public void UpdatePerson(String name, int p_id){
    		System.out.println("成功修改数据!");
    		this.getHibernateTemplate().bulkUpdate("update Person set name = ? where PId = ?",new Object[]{name,p_id}) ;
    	}
    	
    	/*
    	 * 根据id级联删除个人信息和证件信息
    	 */
    	public void DeletePerson(int id){
    		System.out.println("成功删除数据!");
    		this.getHibernateTemplate().delete(findById(id));
    	}
    }

**\#业务逻辑层**

**PersonBiz.java**

package com.sunline.biz;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.stereotype.Service;
    
    import com.sunline.dao.PersonDao;
    import com.sunline.entity.Person;
    
    @Service(value="personBiz")
    public class PersonBiz {
    	
    	/*
    	 * 添加人员信息  
    	 */
    	@Autowired
    	@Qualifier("personDao")            //使用@Qualifier注解来说明使用哪一个实现类
        PersonDao personDao;
        public void AddPerson(Person person){
           personDao.AddPerson(person);
        }
        
    	/*
    	 * 查询id为XX的所有人员和证件信息
    	 */
    	public Person findById(int id) {
    		return personDao.findById(id);
    	}
    	
    	/*
    	 * 修改个人信息
    	 */
    	public void UpdatePerson(String name, int p_id){
    		personDao.UpdatePerson(name, p_id);
    	}
    	
    	/*
    	 * 根据id级联删除个人信息和证件信息
    	 */
    	public void DeletePerson(int id){
    		personDao.DeletePerson(id);
    	}
    }

**\#测试类**

**Test.java(级联添加)**

package com.sunline.test;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import org.springframework.transaction.annotation.Propagation;
    import org.springframework.transaction.annotation.Transactional;
    
    import com.sunline.biz.PersonBiz;
    import com.sunline.entity.Card;
    import com.sunline.entity.Person;
    
    @Transactional(propagation=Propagation.REQUIRED)
    public class Test {
    
    	/**
    	 * @param args
    	 */
    	@SuppressWarnings("unchecked")
    	@Transactional(propagation=Propagation.REQUIRED)        //用事务管理做双重保障
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
            ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
            PersonBiz personBiz = (PersonBiz) ctx.getBean("personBiz");
            
            Person person = new Person();
            person.setName("海哥");
            
            Card card = new Card();
            card.setPlace("山东省烟台市");
            card.setPersons(person);     //双向一对一
            
            person.setCards(card);       //双向一对一
            personBiz.AddPerson(person);
    	}
    
    }

**DeleteTest.java**

package com.sunline.test;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import org.springframework.transaction.annotation.Propagation;
    import org.springframework.transaction.annotation.Transactional;
    
    import com.sunline.biz.PersonBiz;
    
    @Transactional(propagation=Propagation.REQUIRED)
    public class DelteteTest {
    
    	/**
    	 * @param args
    	 */
    	@SuppressWarnings("unchecked")
    	@Transactional(propagation=Propagation.REQUIRED)        //用事务管理做双重保障
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
            ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
            PersonBiz personBiz = (PersonBiz) ctx.getBean("personBiz");
            
            personBiz.DeletePerson(1);     //级联删除该用户ID相关的所有个人信息和证件信息
    	}
    
    }

**UpdateTest.java(改)**

package com.sunline.test;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import org.springframework.transaction.annotation.Propagation;
    import org.springframework.transaction.annotation.Transactional;
    
    import com.sunline.biz.PersonBiz;
    
    @Transactional(propagation=Propagation.REQUIRED)
    public class UpdateTest {
    
    	/**
    	 * @param args
    	 */
    	@SuppressWarnings("unchecked")
    	@Transactional(propagation=Propagation.REQUIRED)        //用事务管理做双重保障
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
            ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
            PersonBiz personBiz = (PersonBiz) ctx.getBean("personBiz");
            
            personBiz.UpdatePerson("杨旭", 1);
    	}
    
    }

**QueryTest.java(级联查找)**

package com.sunline.test;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import org.springframework.transaction.annotation.Propagation;
    import org.springframework.transaction.annotation.Transactional;
    
    import com.sunline.biz.PersonBiz;
    import com.sunline.entity.Card;
    import com.sunline.entity.Person;
    
    @Transactional(propagation=Propagation.REQUIRED)
    public class QueryTest {
    
    	/**
    	 * @param args
    	 */
    	@SuppressWarnings("unchecked")
    	@Transactional(propagation=Propagation.REQUIRED)        //用事务管理做双重保障
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
            ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
            PersonBiz personBiz = (PersonBiz) ctx.getBean("personBiz");
            
            Person person = personBiz.findById(1);
            Card card = person.getCards();
            System.out.println("你的个人信息为: "+person.getPId()+" "+person.getName());
            System.out.println("你的证件信息为: "+card.getCId()+" "+card.getPlace());
    	}
    
    }