编程式事务管理、声明式事务管理中HibernateDaoSupport与JdbcDaoSupport的应用

编程式事务管理、声明式事务管理中HibernateDaoSupport与JdbcDaoSupport的应用：
1、编程式事务管理：
1>、JdbcDaoSupport编程式事物管理，必须继承JdbcDaoSupport类，得到JdbcTemplate从而实现事务管理；

TestA.java:
public class TestA extends JdbcDaoSupport{
public void test(){
PlatformTransactionManager ptm = new DataSourceTransactionManager(this.getDataSource());
TransactionTemplate tst = new TransactionTemplate(ptm);
tst.execute(new TransactionCallback(){
public Object doInTransaction(TransactionStatus status) {
getJdbcTemplate().update("update User set password='1230' where userid='1001'");
getJdbcTemplate().update("update User set email='4444444444444444444444444444444444' where userid='1002'");
getJdbcTemplate().update("update User set phone='phone'");
return null;
}
});
}

public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
TestA t = (TestA)ctx.getBean("testa");
t.test();
}
}

需要在Spring的配置文件applicationContext.xml中控制反转用到连接数据库中的类是注入DataSource，如下：
applicationContext.xml:
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource">

... ...

<property name="defaultAutoCommit">
<value>false</value>
</property>
</bean>

<bean id="testa" class="com.sun.demo.TestA">
<property name="dataSource">
<ref bean="myDataSource"/>
</property>
</bean>
2>、HibernateDaoSupport编程式事物管理，必须继承HibernateDaoSupport类，得到HibernateTemplate从而实现事务管理；
TestB.java:
public class TestB extends HibernateDaoSupport{
public void test(){
HibernateTransactionManager hm = new HibernateTransactionManager(this.getSessionFactory());
TransactionTemplate ttm = new TransactionTemplate(hm);
ttm.execute(new TransactionCallback(){
public Object doInTransaction(TransactionStatus status) {
User u1 = new User();
u1.setUserid("3001");
u1.setPassword("3001");
getHibernateTemplate().save(u1);

User u2 = new User();
u2.setUserid("3001");
u2.setPassword("3002");
getHibernateTemplate().save(u2);
return null;
}
});
}

public static void main(String[] args) {
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
TestB t = (TestB)ctx.getBean("testb");
t.test();
}
}
需要在Spring的配置文件applicationContext.xml中控制反转用到连接数据库中的类是注入SessionsFactory，如下：
applicationContext.xml:
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource">

... ...

<property name="defaultAutoCommit">
<value>false</value>
</property>
</bean>

<bean id="testb" class="com.sun.demo.TestB">
<property name="sessionFactory">
<ref bean="mySessionFactory"/>
</property>
</bean>
2、声明式事务管理：
1>、JdbcDaoSupport声明式样事物管理,必须继承JdbcDaoSupport类；
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource">

... ....

<property name="defaultAutoCommit">
<value>false</value>
</property>
</bean>

需要在Spring配置文件中配置声明事务处理，用JdbcDaoSupport提供的DataSourceTransactionManager如下：
<!-- 事务管理配置 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource">
<ref bean="myDataSource"/>
</property>
</bean>

<bean id="baseTransactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
<property name="transactionManager" ref="transactionManager"/>
<!-- 事务管理属性 -->
<property name="transactionAttributes">
<props>
<prop key="updateUser">PROPAGATION_REQUIRED</prop>
</props>
<!-- 事务管理目标bean -->
</property>
<property name="target" ref="userdao"></property>
</bean>

<bean id="userdao" class="com.sun.demo.UserDao">
<property name="dataSource">
<ref bean="myDataSource"/>
</property>
</bean>

IUserDao.java://定义接口
public interface IUserDao {
public void updateUser();
}

UserDao.java:
public class UserDao extends JdbcDaoSupport implements IUserDao{
public void updateUser(){
this.getJdbcTemplate().update("update User set password='password1' where userid='1001'");
this.getJdbcTemplate().update("update User set password='password9999999999999999999999999999999' where userid='1002'");
}
}

TestA.java://调用updateUser()方法
public class{

public void test(){
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
IUserDao u = (IUserDao)ctx.getBean("baseTransactionProxy");
u.updateUser();
}

public static void main(String[] args) {
TestA t = new TestA();
t.test();
}
}
2>、HibernateDaoSupport声明式事物管理，必须继承HibernateDaoSupport类；
IUserDao.java://定义接口
public interface IUserDao {
public void updateUser();
}
UserDao.java:
public class UserDao extends HibernateDaoSupport implements IUserDao{
public void updateUser(){
User u1 = new User();
u1.setUserid("1001");
u1.setPassword("5001");
this.getHibernateTemplate().update(u1);

User u2 = new User();
u2.setUserid("1003");
u2.setPassword("20015555555555555555555555555555555555555555555");
this.getHibernateTemplate().update(u2);
}
}

测试：
public class TestA{

public void test(){
ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
IUserDao userdao= (IUserDao)ctx.getBean("userproxy");
userdao.updateUser();
}

public static void main(String[] args) {
TestA t = new TestA();
t.test();
}
}
需要在Spring配置文件中配置声明事务处理，用JdbcDaoSupport提供的HibernateTransactionManager如下：
applicationContext.xml:
<!-- 事务管理配置 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref bean="mySessionFactory"/>
</property>
</bean>

<bean id="baseTransactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">
<property name="transactionManager" ref="transactionManager"/>
<!-- 事务管理属性 -->
<property name="transactionAttributes">
<props>
<prop key="update*">PROPAGATION_REQUIRED</prop>
<prop key="save*">PROPAGATION_REQUIRED</prop>
<prop key="delete*">PROPAGATION_REQUIRED</prop>
</props>
<!-- 事务管理目标bean -->
</property>
</bean>

<bean id="userdao" class="com.sun.demo.UserDao">
<property name="sessionFactory">
<ref bean="mySessionFactory"/>
</property>
</bean>

<bean id="userproxy" parent="baseTransactionProxy">
<property name="target" ref="userdao"></property>
</bean>