[英]Spring Hibernate Transaction: Data is not getting saved
我創建了一個簡單的spring應用程序,其中有一個帶有帳號(主鍵),帳戶類型,余額的帳戶表
每當我嘗試更新未發生的數據時,它仍然顯示舊值。
這是我的配置文件。
<?xml version="1.0" encoding="UTF-8"?>
<beans
xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<context:annotation-config/>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/jlcindiadb"/>
<property name="username" value="root"/>
<property name="password" value="123"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingResources">
<list>
<value>com/jlcindia/spring/Account.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto" >update</prop>
</props>
</property>
</bean>
<bean id="hibernateTemp" class="org.springframework.orm.hibernate3.HibernateTemplate"
autowire="constructor"/>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" autowire="constructor"/>
<bean id="accdao" class="com.jlcindia.spring.HibernateAccountDAO"/>
<bean id="as" class="com.jlcindia.spring.AccountServiceImpl"/>
</beans>
用於存款功能的代碼段。
public void deposit(int accno, double amt) {
TransactionDefinition txDef= new DefaultTransactionDefinition();
TransactionStatus ts= txManager.getTransaction(txDef);
Account acc=htemp.load(Account.class,accno,LockMode.READ);
double cbal=acc.getBal();
acc.setBal(cbal+amt);
htemp.update(acc);
txManager.commit(ts);
}
最初,我的表包含以下記錄:
Account Account Balance
No Type
Account1: 101 SA 1000
Account2: 102 SA 2000
Account3: 103 CA 3000
現在開始更新數據。 也就是說,在存儲數據之后,它仍然顯示相同的余額。 為什么會有這種行為? 請解釋..
更新:
包含存款功能的類。
import org.hibernate.LockMode;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.orm.hibernate3.HibernateTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.DefaultTransactionDefinition;
public class HibernateAccountDAO implements AccountDAO{
@Autowired
HibernateTemplate htemp=null;
@Autowired
HibernateTransactionManager txManager=null;
@Override
public void deposit(int accno, double amt) {
TransactionDefinition txDef= new DefaultTransactionDefinition();
TransactionStatus ts= txManager.getTransaction(txDef);
Account acc=htemp.load(Account.class,accno,LockMode.READ);
double cbal=acc.getBal();
//int cbal=(int)bal;
acc.setBal(cbal+amt);
htemp.update(acc);
txManager.commit(ts);
//System.out.println("Acc get Account number "+acc.getAccno());
//System.out.println("Acc get Account type "+acc.getAtype());
//System.out.println("Acc get Balance "+acc.getBal());
}
@Override
public void withdraw(int accno, double amt) {
TransactionDefinition txDef= new DefaultTransactionDefinition();
TransactionStatus ts= txManager.getTransaction(txDef);
Account acc=htemp.load(Account.class,accno,LockMode.READ);
double cbal=acc.getBal();
if(cbal>500+amt){
acc.setBal(cbal-amt);
htemp.update(acc);
}else{
throw new InSufficientFundsException();
}
txManager.commit(ts);
}
@Override
public void fundsTransfer(int saccno, int daccno, double amt) {
TransactionDefinition txDef= new DefaultTransactionDefinition();
TransactionStatus ts= txManager.getTransaction(txDef);
try{
Account acc1=htemp.load(Account.class,daccno,LockMode.READ);
double dcbal=acc1.getBal();
acc1.setBal(dcbal+amt);
htemp.update(acc1);
Account acc2=htemp.load(Account.class,saccno,LockMode.READ);
double scbal=acc2.getBal();
if(scbal>=500+amt){
acc2.setBal(scbal-amt);
htemp.update(acc2);
}else{
throw new InSufficientFundsException();
}
txManager.commit(ts);
}catch(Exception e){
txManager.rollback(ts);
e.printStackTrace();
}
}
@Override
public double getBalance(int accno) {
TransactionDefinition txDef= new DefaultTransactionDefinition();
TransactionStatus ts= txManager.getTransaction(txDef);
Account acc=htemp.load(Account.class,accno,LockMode.READ);
double cbal=acc.getBal();
return cbal;
}
}
似乎您沒有提供會話工廠來休眠模板和事務管理器。 嘗試通過修改特定的xml部分再次進行測試,如下所示? :
<bean id="hibernateTemp" class="org.springframework.orm.hibernate3.HibernateTemplate"
autowire="constructor"/>
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"
autowire="constructor">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
我的模擬代碼段:
Resource r=new ClassPathResource("applicationContext.xml");
BeanFactory factory=new XmlBeanFactory(r);
HibernateTemplate template = (HibernateTemplate) factory.getBean("template");
HibernateTransactionManager txManager = (HibernateTransactionManager) factory.getBean ("txManager");
TransactionDefinition txDef= new DefaultTransactionDefinition();
TransactionStatus ts= txManager.getTransaction(txDef);
Employee acc=template.load(Employee.class,114,LockMode.READ);
acc.setName("varun");
template.update(acc);
txManager.commit(ts);
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