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
