Hibernate_上课自己的代码

最新推荐文章于 2020-05-30 17:37:04 发布
最新推荐文章于 2020-05-30 17:37:04 发布
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分类专栏： java_JDBC&Hibernate 文章标签： Hibernate Oracle XML DAO .net 
第一天
**********************************************************
原理：
1.读取并解析配置文件
2.读取并解析映射信息，创建SessionFactory
3.打开Sesssion
4.创建事务Transation
5.持久化操作
6.提交事务
7.关闭Session
8.关闭SesstionFactory
第一步  写po类
package hibernate;
//biz
public class Account {
    private Long oid;
    private String actNo;    
    private double bal;

    public Account() {
        
    }
    public Account(String actNo, double bal) {
        super();
        this.actNo = actNo;
        this.bal = bal;
    }
    
    public Long getOid() {
        return oid;
    }
    public void setOid(Long oid) {
        this.oid = oid;
    }
    public String getActNo() {
        return actNo;
    }
    public void setActNo(String actNo) {
        this.actNo = actNo;
    }
    public double getBal() {
        return bal;
    }
    public void setBal(double bal) {
        this.bal = bal;
    }
    
}
第二步
注意2个XML文件的位置
Account.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 
   package="hibernate">
   <class name="Account" table="t_act">
      <id name="oid" column="OID">
         <generator class="hilo">//算法的类名
            <param name="table">t_hilo</param>
            <param name="column">HI</param>
         </generator>
      </id>
      <property name="actNo"
                column="ACTNO"/>
      <property name="bal" 
                column="BALANCE"/>
   </class>
</hibernate-mapping>

hibernate.cfg.xml
<?xml version="1.0"?>
<!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="show_sql">true</property>
    <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
    <property name="connection.url">jdbc:oracle:thin:@192.168.7.88:1521:tarena</property>
    <property name="connection.username">rensx</property>
    <property name="connection.password">rensx</property>
    <property name="connection.isolation">2</property>
    <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
    <property name="myeclipse.connection.profile">rensx_oracle</property>
    <mapping resource="hibernate/Account.hbm.xml" />

</session-factory>
</hibernate-configuration>


第三步
create table t_act(
OID number(12) primary key,
ACTNO varchar(30) not null unique,
BALANCE number(12,2) not null);

drop table t_hilo;
create table t_hilo(
HI number(12) primary key);

insert into t_hilo values(1);
commit;


第四步
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class Test {

    public static void main(String[] args) {
        Configuration cfg = new Configuration().configure();//创建Configuration，初始化实例的所有变量，加载hibernate.cfg.xml至该实例                              //通过hibernate.cfg.xml中的mapping节点配置并加载.hbm.xml文件
        SessionFactory sf = cfg.buildSessionFactory();//创建SessionFactory实例
        Account act = new Account("act_001", 2000.0);
        Session s = sf.openSession();//创建连接
        // 非捕捉异常discriminator-value

        try {
            s.beginTransaction();//session创建事务实例

            s.save(act);//对数据库的访问操作

            s.getTransaction().commit();
        } catch (HibernateException e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        } finally {
            s.close();
            sf.close();
        }

    }
}
**************************************************************************************
第二天
SessionFactory:重量级别的  线程安全的 开销比较大
Session:轻量级的 线程不安全

工具类
public class HibernateUtil {
    private static SessionFactory sf;

    public static SessionFactory getSessionFactory() {
        if (sf == null || sf.isClosed()) {
            try {
                sf = new Configuration().configure().buildSessionFactory();
            } catch (HibernateException e) {
                e.printStackTrace();
            }
        }
        return sf;
    }

    public static void release() {
        if(sf!=null&&!sf.isClosed()){
            sf.close();
        }        
    }
}

public class Test2 {

    public static void main(String[] args) {
        Session s = null;
        try {
            s = HibernateUtil.getSessionFactory().openSession();
            s.beginTransaction();
            String hql = "from TestRen a where a.name=?";// 这是类 不是表
            // 当具有唯一性 返回一个对象时 不用list集合了
            // List l=s.createQuery(hql).setString(0, "ren").list();
            Query q = s.createQuery(hql);
            q.setString(0, "ren");// 参数从0开始
            List l = q.list();

            StringBuffer sb = new StringBuffer();
            for (TestRen a : (List<TestRen>) l) {
                sb.append(a.getOid() + "  " + a.getName() + "\n");
            }
            System.out.println(sb.toString());
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        } finally {
            s.close();
            HibernateUtil.release();
        }
    }

}

public class Test3 {

    public static void main(String[] args) {
        Session s = null;
        try {
            s = HibernateUtil.getSessionFactory().openSession();
            s.beginTransaction();
            // String hql="from TestRen a where a.name=?";//这是类 不是表
            String hql = "from TestRen a where a.name=:canshu";// 可以不用占位符号 使用参数

            // 当具有唯一性 返回一个对象时 不用list集合了
            TestRen a = (TestRen) s.createQuery(hql).setString("canshu", "ren")
                    .uniqueResult();
            StringBuffer sb = new StringBuffer();
            sb.append(a.getOid() + "  " + a.getName() + "\n");
            System.out.println(sb.toString());
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        } finally {
            s.close();
            HibernateUtil.release();
        }
    }

}

public class Test4-1{

    public static void main(String[] args) {
        Session s = null;
        try {
            s = HibernateUtil.getSessionFactory().openSession();
            s.beginTransaction();
            //List params =new Arra
            String hql = "from TestRen a where a.name like ?";
            Query q = s.createQuery(hql);
            q.setString(0, "ren％");// 参数从0开始
            List l = q.list();

            StringBuffer sb = new StringBuffer();
            for (TestRen a : (List<TestRen>) l) {
                sb.append(a.getOid() + "  " + a.getName() + "\n");
            }
            System.out.println(sb.toString());
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        } finally {
            s.close();
            HibernateUtil.release();
        }
    }

}

public class Test4-2{

    public static void main(String[] args) {
        Session s = null;
        try {
            s = HibernateUtil.getSessionFactory().openSession();
            s.beginTransaction();
            
            List params =new ArrayList();
            params.add("ren");
            params.add("ren2");
            params.add("ren3");
            String hql = "from TestRen a where a.name in(:can)";
            Query q = s.createQuery(hql);
            q.setParameterList("can", params);//最好这样用
            List l = q.list();

            StringBuffer sb = new StringBuffer();
            for (TestRen a : (List<TestRen>) l) {
                sb.append(a.getOid() + "  " + a.getName() + "\n");
            }
            System.out.println(sb.toString());
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        } finally {
            s.close();
            HibernateUtil.release();
        }
    }

}
对象状态：暂态 持久态 游离态的转换图


hibernate 实现电子银行
package com.tarena.ebank.biz;
public class Account {
    private Long oid;
    private String actNo;
    private double bal;
    public void deposite(double amount){
        bal = bal + amount;
    }
    public void withdraw(double amount){
        bal = bal - amount;
        
    }
    public Account(String actNo, double bal) {
        super();
        this.actNo = actNo;
        this.bal = bal;
    }
    public String getActNo() {
        return actNo;
    }
    public void setActNo(String actNo) {
        this.actNo = actNo;
    }
    public double getBal() {
        return bal;
    }
    public void setBal(double bal) {
        this.bal = bal;
    }
    public Long getOid() {
        return oid;
    }
    public void setOid(Long oid) {
        this.oid = oid;
    }
    public Account() {
        super();
    }
}

package com.tarena.ebank.biz;
public interface IAccountService {
    /*增加账户,删除账户,查询余额,存款,取款,转帐*/
    public void createAccount(Account act);
    public void removeAccount(String actNo);
    public double getBal(String actNo);
    public void deposite(String actNo,double amount);
    public void withdraw(String actNo,double amount);
    public void transfer(String from ,String to, double amount);
}

public class AccountServiceHbnImpl implements IAccountService {
    private IAccountDAO dao = AccountDAOFactory.getDAO("hbn");

    @Override
    public void createAccount(Account act) {
        Session s = null;
        try {
            s = HbnUtil.getSessionFactory().openSession();
            s.beginTransaction();
            dao.insert(act, s);
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        }finally{
            s.close();
        }

    }

    @Override
    public void deposite(String actNo, double amount) {
        Session s = null;
        try {
            s = HbnUtil.getSessionFactory().openSession();
            s.beginTransaction();
            Account a = 
                dao.findAccountByActNo(actNo, s);
            a.deposite(amount);
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        }finally{
            s.close();
        }

    }

    @Override
    public double getBal(String actNo) {
        Session s = null;
        double bal = 0.0;
        try {
            s = HbnUtil.getSessionFactory().openSession();
            s.beginTransaction();
            Account a = 
                dao.findAccountByActNo(actNo, s);
            bal = a.getBal();
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        }finally{
            s.close();
        }
        return bal;
    }

    @Override
    public void removeAccount(String actNo) {
        Session s = null;
        try {
            s = HbnUtil.getSessionFactory().openSession();
            s.beginTransaction();
            dao.del(actNo, s);
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        }finally{
            s.close();
        }

    }

    @Override
    public void transfer(String from, String to, double amount) {
        Session s = null;
        try {
            s = HbnUtil.getSessionFactory().openSession();
            s.beginTransaction();
            dao.findAccountByActNo(from, s)
               .withdraw(amount);
            dao.findAccountByActNo(to, s)
               .deposite(amount);
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        }finally{
            s.close();
        }

    }

    @Override
    public void withdraw(String actNo, double amount) {
        Session s = null;
        try {
            s = HbnUtil.getSessionFactory().openSession();
            s.beginTransaction();
            Account a = 
                dao.findAccountByActNo(actNo, s);
            a.withdraw(amount);
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        }finally{
            s.close();
        }

    }

}

package com.tarena.ebank.biz;
public class AccountServiceFactory {
    public static IAccountService getService(String type){
        IAccountService s = null;
        if("hbn".equalsIgnoreCase(type)){
            s = new AccountServiceHbnImpl();
        }else if("jdbc".equalsIgnoreCase(type)){
            s = new AccountServiceJdbcImpl();
        }
        return s;
    }
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping 
       package="com.tarena.ebank.biz">
   <class name="Account" table="t_ebank_act">
      <id name="oid" column="OID" >
        <generator class="seqhilo"></generator>
      </id>
      <property name="actNo" 
                column="ACTNO"
                unique="true"
                not-null="true"></property>
      <property name="bal"
                column="BALANCE"
                not-null="true" /> 
   </class>
</hibernate-mapping>

public interface IAccountDAO {
     public void insert(Account act,Session s) throws DataException;
     public void del(String actNo,Session s) throws DataException;
     public void update(Account act, Session s) throws DataException;
     public Account findAccountByActNo(String actNo,Session s) throws DataException;
}
public class AccountDAOHbnImpl implements IAccountDAO {

    @Override
    public void del(String actNo, Session s) throws DataException {
        try {
            s.delete(findAccountByActNo(actNo,s));
        } catch (HibernateException e) {
            e.printStackTrace();
            throw new DataException("del error");
        }
    }

    @Override
    public Account findAccountByActNo(String actNo, Session s)
            throws DataException {
        Account a = null;
        try {
            String hql = "from Account a " +
                    "where a.actNo=?";
            a = (Account)s.createQuery(hql)
                         .setString(0, actNo)
                         .uniqueResult();
        } catch (HibernateException e) {
            e.printStackTrace();
            throw new DataException("find error");
        }
        return a;
    }

    @Override
    public void insert(Account act, Session s) throws DataException {
        try {
            s.saveOrUpdate(act);
        } catch (HibernateException e) {
            e.printStackTrace();
            throw new DataException("save or update error");
        }

    }

    @Override
    public void update(Account act, Session s) throws DataException {
        insert(act,s);
    }

}

public class AccountDAOFactory {
    public static IAccountDAO getDAO(String type){
        IAccountDAO dao = null;
        if("hbn".equalsIgnoreCase(type)){
          dao = new AccountDAOHbnImpl();
        }else if("jdbc".equalsIgnoreCase (type)){
          dao = new AccountDAOJdbcImpl();
        }
        return dao;
    }
}
import com.tarena.ebank.biz.Account;
import com.tarena.ebank.biz.AccountServiceFactory;
import com.tarena.ebank.biz.IAccountService;

public class Test {
    public static void main(String[] args) {
        IAccountService s = 
            AccountServiceFactory.getService("hbn");
        s.createAccount(new Account("a-001",12000.0));
        s.createAccount(new Account("a-002",7000.0));
        StringBuffer sb = new StringBuffer();
        
        sb.append("a-001="+s.getBal("a-001")+"\n");
        sb.append("a-002="+s.getBal("a-002")+"\n");
        sb.append("从a-001转756.0到a-002\n");
        s.transfer("a-001", "a-002", 756.0);
        sb.append("a-001="+s.getBal("a-001")+"\n");
        sb.append("a-002="+s.getBal("a-002")+"\n");
        
        System.out.print(sb.toString());    
        
    }

}

****************************************************************
第三天
关联映射－基数映射－1:1  非常重要 注意的设计(Account3 主键)
唯一外健映射：
public class Account3 {
    private Long oid;
    private String actNo;
    private double bal;
    private User3 owner;
    public void deposite(double amount) {
        bal = bal + amount;
    }
    public void withdraw(double amount) {
        bal = bal - amount;
    }
    public Account3(String actNo, double bal) {
        this.actNo = actNo;
        this.bal = bal;
    }
    public Account3() {
        super();
    }
    public Long getOid() {
        return oid;
    }

    public void setOid(Long oid) {
        this.oid = oid;
    }
    public String getActNo() {
        return actNo;
    }
    public void setActNo(String actNo) {
        this.actNo = actNo;
    }

    public double getBal() {
        return bal;
    }

    public void setBal(double bal) {
        this.bal = bal;
    }
    public User3 getOwner() {
        return owner;
    }
    public void setOwner(User3 owner) {
        this.owner = owner;
    }
}
public class User3 {
    private Long oid;
    private String uid;
    private String name;
    private Account3 act;    
    public User3() {
    }
    
    public User3(String uid, String name) {
        this.uid = uid;
        this.name = name;
    }

    public Long getOid() {
        return oid;
    }
    public void setOid(Long oid) {
        this.oid = oid;
    }
    public String getUid() {
        return uid;
    }
    public void setUid(String uid) {
        this.uid = uid;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Account3 getAct() {
        return act;
    }
    public void setAct(Account3 act) {
        this.act = act;
        act.setOwner(this);注意 为Account中添加USER3
    }
    
}
<?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 
   package="hibernate">
   <class name="Account3" table="t_act">
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
      <property name="actNo"
                column="ACTNO"
                not-null="true"
                unique="true"/>
      <property name="bal" 
                column="BALANCE"
                not-null="true"/>
      <one-to-one name="owner" property-ref="act"
                      cascade="save-update"></one-to-one>//主键
   </class>
</hibernate-mapping>

<?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 
   package="hibernate">
   <class name="User3" table="t_user">
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
      <property name="uid"
                column="USERID"
                not-null="true"
                unique="true"/>
      <property name="name" 
                column="NAME"
                not-null="true"/>
      <many-to-one name="act" 
                column="fid"
                unique="true"
                cascade="all"></many-to-one>//外健
   </class>
</hibernate-mapping>

<?xml version="1.0"?>
<!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="show_sql">true</property>
    <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
    <property name="connection.url">jdbc:oracle:thin:@192.168.7.88:1521:tarena</property>
    <property name="connection.username">rensx</property>
    <property name="connection.password">rensx</property>
    <property name="connection.isolation">2</property>
    <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
    <property name="myeclipse.connection.profile">rensx_oracle</property>
    <property name="hbm2ddl.auto">create</property>
    <mapping resource="hibernate/Account3.hbm.xml" />
    <mapping resource="hibernate/User3.hbm.xml" />
</session-factory>
</hibernate-configuration>


测试类*******************
public class TestAcconut3 {
    public static void main(String[] args) {
        User3 u = new User3("u-001", "ren");
        Account3 a = new Account3("act-001", 200.0);
        Session s = null;
        s = HibernateUtil.getSessionFactory().openSession();
        s.beginTransaction();
        u.setAct(a);
        try {
            s.save(u);
            s.getTransaction().commit();
            s.beginTransaction();
            String hql = "from User3 a where a.uid = ?";
            Query q = s.createQuery(hql);
            User3 user = (User3) q.setString(0, "u-001").uniqueResult();
            StringBuffer sb = new StringBuffer();
            sb.append(user.getName() + ">>>>" + user.getAct().getBal());
            System.out.println(sb.toString());
            s.getTransaction().commit();
        } catch (Exception e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        } finally {
            s.close();
            HibernateUtil.release();
        }
    }
}

共享主键方案：常用
Account oid 主键
User oid 主键 又是外健

<?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 
   package="hibernate">
   <class name="Account" table="t_act">
      <id name="oid" column="OID">
         <generator class="hilo">
            <param name="table">t_hilo</param>
            <param name="column">HI</param>
         </generator>
      </id>
      <property name="actNo"
                column="ACTNO"/>
      <property name="bal" 
                column="BALANCE"/>//去除property-ref="act"
   </class>
</hibernate-mapping>


<?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 
   package="hibernate">
   <class name="User3" table="t_user">
      <id name="oid" column="OID">
         <generator class="foreign">//写法
         <param name="property">act</param>//写法
         </generator>
      </id>
      <property name="uid"
                column="USERID"
                not-null="true"
                unique="true"/>
      <property name="name" 
                column="NAME"
                not-null="true"/>
      <one-to-one name="act" 
                cascade="all"
                constrained="true"></one-to-one>//写法
   </class>
</hibernate-mapping>
别的都一样
*************************************************************
第四天
ont-to-many关系：
注意每个类中新添加的东西

package hibernate;

public class Account4 {
    private Long oid;
    private String actNo;
    private double bal;
    private User4 owner;

    public Account4(String actNo, double bal) {
        super();
        this.actNo = actNo;
        this.bal = bal;
    }
    public void deposite(double amount){
        bal = bal + amount;
    }
    public void withdraw(double amount){
        bal = bal - amount;
    }
    public Long getOid() {
        return oid;
    }

    public void setOid(Long oid) {
        this.oid = oid;
    }

    public String getActNo() {
        return actNo;
    }

    public void setActNo(String actNo) {
        this.actNo = actNo;
    }

    public double getBal() {
        return bal;
    }

    public void setBal(double bal) {
        this.bal = bal;
    }

    public User4 getOwner() {
        return owner;
    }

    public void setOwner(User4 owner) {
        this.owner = owner;
    }

    public Account4() {
        super();
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((actNo == null) ? 0 : actNo.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final Account4 other = (Account4) obj;
        if (actNo == null) {
            if (other.actNo != null)
                return false;
        } else if (!actNo.equals(other.actNo))
            return false;
        return true;
    }
}
package hibernate;

import java.util.HashSet;
import java.util.Set;

public class User4 {
    private Long oid;
    private String uid;
    private String name;
    private Set<Account4> acts = new HashSet<Account4> ();

    public User4(String uid, String name) {
        super();
        this.uid = uid;
        this.name = name;
    }

    public void addAct(Account4 act){
        acts.add(act);
        act.setOwner(this);
    }
    public Long getOid() {
        return oid;
    }

    public void setOid(Long oid) {
        this.oid = oid;
    }

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    public Set<Account4>  getActs() {
        return acts;
    }

    public void setActs(Set<Account4>  acts) {
        this.acts = acts;
    }

    public User4() {
        super();
    }
}
<?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 
   package="hibernate">
   <class name="Account4" table="t_act">
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
      <property name="actNo"
                column="ACTNO"
                not-null="true"
                unique="true"/>
      <property name="bal" 
                column="BALANCE"
                not-null="true"/>
      <many-to-one name="owner" 
                    column="fid"
                cascade="save-update"></many-to-one>
   </class>
</hibernate-mapping>

<?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 
   package="hibernate">
   <class name="User4" table="t_user">
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
      <property name="uid"
                column="USERID"
                not-null="true"
                unique="true"/>
      <property name="name" 
                column="NAME"
                not-null="true"/>
      <set name="acts" cascade="all" inverse="true">//inverse 默认为false  true为交出维护权
      <key column="fid"/>//指明外健  Account4的fid为外健
      <one-to-many class="Account4"></one-to-many>//说明set里的类型
      </set>
   </class>
</hibernate-mapping>

package hibernate;

import org.hibernate.HibernateException;
import org.hibernate.Session;


public class TestAccount4 {

    public static void main(String[] args) {
        User4 u = new User4("u-001", "Mike");
        Account4 a = new Account4("act-001", 3000.0);
        u.addAct(a);
        a = new Account4("act-002",8000.0);
        u.addAct(a);
        Session s = null;
        try {
            s = HibernateUtil.getSessionFactory().openSession();
            s.beginTransaction();
            s.save(a);
            s.getTransaction().commit();
        } catch (HibernateException e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        } finally {
            s.close();
            HibernateUtil.release();
        }

    }

}

package hibernate;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;

public class TestAccount4_2 {
    public static void main(String[] args) {
        Session s=null;        
        try {
            s = HibernateUtil.getSessionFactory().openSession();
            s.beginTransaction();
            User4 u=(User4)s.get(User4.class, 20L);
            if(u==null){System.out.println("null");}
            else {System.out.println(u.getName());}
            
//            String hql="delete User4 a where a.name=?";
//            Query q=s.createQuery(hql).setString(0, u.getName());
//            q.executeUpdate();
            
            s.delete(u);//可以级联删除 在 XML文件中的配置的级联删除只使用session的delete 是先删子表
                              // HQL不可级联删除  因为XML文件中的配置的级联删除不影响数据库的表结构的级联删除
            s.getTransaction().commit();
        } catch (HibernateException e) {
            e.printStackTrace();
            s.getTransaction().rollback();
        } finally {
            s.close();
            HibernateUtil.release();
        }
    }
}

下午
many-to-many******************************

package hibernate.course;
import java.util.HashSet;
import java.util.Set;

public class Student {
    private Long oid;
    private String sid;
    private String name;
    private Set cours = new HashSet();

    public Student(String sid, String name) {
        super();
        this.sid = sid;
        this.name = name;
    }
    public Student() {
        super();
    }
    public void registerCour(Course c){
        cours.add(c);
        c.getStus().add(this);
    }
    public Long getOid() {
        return oid;
    }

    public void setOid(Long oid) {
        this.oid = oid;
    }

    public String getSid() {
        return sid;
    }

    public void setSid(String sid) {
        this.sid = sid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Set getCours() {
        return cours;
    }

    public void setCours(Set cours) {
        this.cours = cours;
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((sid == null) ? 0 : sid.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final Student other = (Student) obj;
        if (sid == null) {
            if (other.sid != null)
                return false;
        } else if (!sid.equals(other.sid))
            return false;
        return true;
    }
}

package hibernate.course;
import java.util.HashSet;
import java.util.Set;

public class Course {
  private Long oid;
  private String cid;
  private String name;
  private Set Stus = new HashSet();
public Course(String cid, String name) {
    super();
    this.cid = cid;
    this.name = name;
}
public Course() {
    super();
}
public Long getOid() {
    return oid;
}
public void setOid(Long oid) {
    this.oid = oid;
}
public String getCid() {
    return cid;
}
public void setCid(String cid) {
    this.cid = cid;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public Set getStus() {
    return Stus;
}
public void setStus(Set stus) {
    Stus = stus;
}
@Override
public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((cid == null) ? 0 : cid.hashCode());
    return result;
}
@Override
public boolean equals(Object obj) {
    if (this == obj)
        return true;
    if (obj == null)
        return false;
    if (getClass() != obj.getClass())
        return false;
    final Course other = (Course) obj;
    if (cid == null) {
        if (other.cid != null)
            return false;
    } else if (!cid.equals(other.cid))
        return false;
    return true;
}
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping 
       package="hibernate.course">
   <class name="Course" table="t_cour">
      <id name="oid" column="OID" >
        <generator class="seqhilo" />
      </id>
      <property name="cid" 
                column="CID"
                unique="true"
                not-null="true"></property>
      <property name="name" 
                column="NAME"
                not-null="true"/>
      <set name="stus" table="t_enrollment"
           cascade="save-update">
         <key column="cfid" />//做为t_enrollment的外健 指向Course的主键
         <many-to-many class="Student" 
                       column="sfid"/>
      </set>
            
    </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">
<hibernate-mapping 
       package="hibernate.course">
   <class name="Student" table="t_stu">
      <id name="oid" column="OID" >
        <generator class="seqhilo" />
      </id>
      <property name="sid" 
                column="SID"
                unique="true"
                not-null="true"></property>
      <property name="name" 
                column="NAME"
                not-null="true"/>
      <set name="cours" table="t_enrollment"
           cascade="save-update"
           inverse="true">
         <key column="sfid" />
         <many-to-many class="Course" 
                       column="cfid"/>
      </set>
    
      
    </class>
</hibernate-mapping>

package hibernate.course;
import java.util.Random;

import org.hibernate.HibernateException;
import org.hibernate.Session;
public class TestManyToMany {
    public static void main(String[] args) {
      String[] sname = {"Mike","Tony","Jack","Rose","Black"};
      String[] cname = {"Core Java","JDBC","Hibernate","Spring","JSP","EJB"};
      Student[] s = new Student[sname.length];
      Course[] c = new Course[cname.length];
      for(int i=0;i<sname.length;i++){
          s[i] = new Student("s-00"+i,sname[i]);
      }
      for(int i=0;i<cname.length;i++){
          c[i] = new Course("c-00"+i,cname[i]);
      }
      for(int i=0;i<sname.length;i++){
         for(int j=0;j<cname.length;j++){
            if(new Random().nextInt()>0){
               s[i].registerCour(c[j]);
            }
         }
      }
      Session ss = null;
      try {
        ss = HibernateUtil.getSessionFactory().openSession();
          ss.beginTransaction();
          ss.save(s[1]);
          ss.getTransaction().commit();
    } catch (HibernateException e) {
        e.printStackTrace();
        ss.getTransaction().rollback();
    }finally{
        ss.close();
        HibernateUtil.release();
    }
      
     
    }

}


单一组件
双方为组合关系才可以使用单一组件
package hibernate.course;
//组件单一
public class Account {
    
    private String actNo;
    private double bal;//属性的写法 无OID 实体类属性

    public Account(String actNo, double bal) {
        this.actNo = actNo;
        this.bal = bal;
    }
    public Account() {
        super();
    }

    public String getActNo() {
        return actNo;
    }
    public void setActNo(String actNo) {
        this.actNo = actNo;
    }

    public double getBal() {
        return bal;
    }

    public void setBal(double bal) {
        this.bal = bal;
    }

}
package hibernate.course;

public class User {
    private Long oid;//
    private String uid;
    private String name;
    private Account act;//含有一个实体类

    public User() {
    }

    public User(String uid, String name) {
        this.uid = uid;
        this.name = name;
    }

    public Long getOid() {
        return oid;
    }

    public void setOid(Long oid) {
        this.oid = oid;
    }

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Account getAct() {
        return act;
    }

    public void setAct(Account act) {
        this.act = act;
    }
}

<?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 
   package="hibernate.course">
   <class name="User" table="t_user">//只写含有实体类属性的那个类的XML映射文件
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
      <property name="uid"
                column="USERID"
                not-null="true"
                unique="true"/>
      <property name="name" 
                column="NAME"
                not-null="true"/>   
               
      <component name="act">//与类的属性相对应
      <property name="actNo" column="ACTNO" />
       <property name="bal" column="BAL" />
      </component>
      
   </class>
</hibernate-mapping>

集合组件one-to-many

package hibernate.test2;
//集合组件
public class Account {
    
    private String actNo;
    private double bal;

    public Account(String actNo, double bal) {
        this.actNo = actNo;
        this.bal = bal;
    }
    public Account() {
        super();
    }

    public String getActNo() {
        return actNo;
    }
    public void setActNo(String actNo) {
        this.actNo = actNo;
    }

    public double getBal() {
        return bal;
    }

    public void setBal(double bal) {
        this.bal = bal;
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((actNo == null) ? 0 : actNo.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Account other = (Account) obj;
        if (actNo == null) {
            if (other.actNo != null)
                return false;
        } else if (!actNo.equals(other.actNo))
            return false;
        return true;
    }

}

package hibernate.test2;

import java.util.HashSet;
import java.util.Set;

//集合组件
public class User {
    private Long oid;
    private String uid;
    private String name;
    private Set acts = new HashSet();
    
    public void addAccount(Account act){
        acts.add(act);
    }
    public User() {
    }

    public User(String uid, String name) {
        this.uid = uid;
        this.name = name;
    }

    public Long getOid() {
        return oid;
    }

    public void setOid(Long oid) {
        this.oid = oid;
    }

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


    public Set getActs() {
        return acts;
    }

    public void setActs(Set acts) {
        this.acts = acts;
    }
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC 
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping 
       package="hibernate.test2">
   <class name="User" table="t_user2">
      <id name="oid" column="OID" >
        <generator class="seqhilo"></generator>
      </id>
      <property name="uid" 
                column="USERID"
                type="string"
                unique="true"
                not-null="true"></property>
      <property name="name"
                column="NAME"
                not-null="true" /> 
    
      <set name="acts" table="t_acts2">
         <key column="fid" />
         <composite-element class="Account">
            <property name="actNo"
                      column="ACTNO"
                      unique="true"
                      not-null="true" />
            <property name="bal"
                      column="BAL" />
         </composite-element>
      </set> 
                   
   </class>
</hibernate-mapping>

***************************************************************
第五天
3种继承映射的实现
一个类一个表：
package hibernate.test2;

public abstract class Account {

    private Long oid;
    private String actNo;
    private double bal;
    private User owner;

    public Account(String actNo, double bal) {
        super();
        this.actNo = actNo;
        this.bal = bal;
    }
    public void deposite(double amount){
        bal = bal + amount;
    }
    public void withdraw(double amount){
        bal = bal - amount;
    }
    public Long getOid() {
        return oid;
    }

    public void setOid(Long oid) {
        this.oid = oid;
    }

    public String getActNo() {
        return actNo;
    }

    public void setActNo(String actNo) {
        this.actNo = actNo;
    }

    public double getBal() {
        return bal;
    }

    public void setBal(double bal) {
        this.bal = bal;
    }

    public User getOwner() {
        return owner;
    }

    public void setOwner(User owner) {
        this.owner = owner;
    }

    public Account() {
        super();
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((actNo == null) ? 0 : actNo.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final Account other = (Account) obj;
        if (actNo == null) {
            if (other.actNo != null)
                return false;
        } else if (!actNo.equals(other.actNo))
            return false;
        return true;
    }
    
    //***************
    public void getMon(double mon){
        bal=bal-mon;
    }
    
    

}
package hibernate.test2;

public class CheckAccount extends Account {
    private double check;//
    
    public CheckAccount(){}
    
    public CheckAccount(String actNo, double bal, double check) {
        super(actNo, bal);
        this.check = check;
    }

    public CheckAccount(String actNo, double bal) {
        super(actNo, bal);
    }
    
    public void getMon(double mon){
        double bal=getBal();
        if(bal+check>mon){
            bal=bal-mon;
            setBal(bal);
        }
        
    }
    public double getCheck() {
        return check;
    }
    public void setCheck(double check) {
        this.check = check;
    }
    
}
package hibernate.test2;

public class DebitAccount extends Account {
        private double debit;
        public DebitAccount(){}
        public DebitAccount(String actNo, double bal) {
            super(actNo, bal);
        }

        public DebitAccount(String actNo, double bal, double debit) {
            super(actNo, bal);
            this.debit = debit;
        }
        public void getMon(double mon){
            double bal=getBal();
            if(bal-debit>=mon){
                bal=bal-mon;
                setBal(bal);
            }
            
        }
        public double getDebit() {
            return debit;
        }
        public void setDebit(double debit) {
            this.debit = debit;
        }
}
package hibernate.test2;

import java.util.HashSet;
import java.util.Set;

public class User {
    private Long oid;
    private String uid;
    private String name;
    private Set<Account> acts = new HashSet<Account> ();

    public User(String uid, String name) {
        super();
        this.uid = uid;
        this.name = name;
    }

    public void addAct(Account act){
        acts.add(act);
        act.setOwner(this);
    }
    public Long getOid() {
        return oid;
    }

    public void setOid(Long oid) {
        this.oid = oid;
    }

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    public Set<Account>  getActs() {
        return acts;
    }

    public void setActs(Set<Account>  acts) {
        this.acts = acts;
    }

    public User() {
        super();
    }}
<?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 
   package="hibernate.test2">
   <class name="Account" table="t_act">
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
      <property name="actNo"
                column="ACTNO"
                not-null="true"
                unique="true"/>
      <property name="bal" 
                column="BALANCE"
                not-null="true"/>
      <many-to-one name="owner" 
                    column="fid"
                cascade="save-update"></many-to-one>
                
       <joined-subclass name="CheckAccount" table="t_checkAct">
       <key column ="oid"/>
       <property name="check" column="ch" not-null="true"/>
       </joined-subclass>
       
       <joined-subclass name="DebitAccount" table="t_debitAct">
       <key column ="oid"/>
       <property name="debit" column="DEBIT" not-null="true"/>
       </joined-subclass>
   </class>
</hibernate-mapping>

<?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 
   package="hibernate.test2">
   <class name="User" table="t_user">
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
      <property name="uid"
                column="USERID"
                not-null="true"
                unique="true"/>
      <property name="name" 
                column="NAME"
                not-null="true"/>
      <set name="acts" cascade="all" inverse="true">
      <key column="fid"/>
      <one-to-many class="Account"></one-to-many>
      </set>
   </class>
</hibernate-mapping>


一个类库一个表：

别的跟上面一样
<?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 
   package="hibernate.test2">
   <class name="Account" table="t_act">
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
   <discriminator column="TYPE"></discriminator>//
      <property name="actNo"
                column="ACTNO"
                not-null="true"
                unique="true"/>
      <property name="bal" 
                column="BALANCE"
                not-null="true"/>
      <many-to-one name="owner" 
                    column="fid"
                cascade="save-update"></many-to-one>
       
       <subclass name="CheckAccount" discriminator-value="c">
       <property name="check" column="ch"></property>
       </subclass>
       <subclass name="DebitAccount" discriminator-value="d">
       <property name="debit" column="DEBIT"></property>
       </subclass> 
   </class>
</hibernate-mapping>


一个实体类一个表：

别的跟上面一样
<?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 
   package="hibernate.test2">
   <class name="Account" table="t_act">
      <id name="oid" column="OID">
         <generator class="seqhilo">
         </generator>
      </id>
      <property name="actNo"
                column="ACTNO"
                not-null="true"
                unique="true"/>
      <property name="bal" 
                column="BALANCE"
                not-null="true"/>
      <many-to-one name="owner" 
                    column="fid"
                cascade="save-update"></many-to-one>
       
      <union-subclass name="CheckAccount" table="t_check">
         <property name="check" column="ch" not-null="true"/>
      </union-subclass>
      <union-subclass name="DebitAccount"  table="t_debit">
         <property name="debit" column="DEBIT" not-null="true" />
      </union-subclass>
   </class>
</hibernate-mapping>
*************************************************
public class HbnUtil {
    private static SessionFactory sf;
    private static ThreadLocal<Session> local = new ThreadLocal<Session>();
    
    public static SessionFactory getSessionFactory() {
        if (sf == null) {
            try {
                sf = new Configuration().configure().buildSessionFactory();
            } catch (HibernateException e) {
                e.printStackTrace();
            }
        }
        return sf;
    }
    
    public static Session getSession() {
        Session s = (Session) local.get();
        if (s == null) {
            s = getSessionFactory().openSession();
            local.set(s);
        }
        return s;
    }
    
    public static void closeSession() {
        Session s = (Session) local.get();
        if (s != null) {
            s.close();
            local.set(null);
        }
    }
    public static void closeSessionFactory() {
        if (sf != null) {
            sf.close();
            sf = null;
        }
    }
}

ThreadLocal解决借口污染的电子银行代码

 

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