Introduction détaillée à l'utilisation de @Transactional au printemps

@Target({ElementType.METHOD, ElementType.TYPE}) 
@Retention(RetentionPolicy.RUNTIME) 
@Inherited 
@Documented 
public @interface Transactional { 
 
  /** 
   * A qualifier value for the specified transaction. 
   * <p>May be used to determine the target transaction manager, 
   * matching the qualifier value (or the bean name) of a specific 
   * {@link org.springframework.transaction.PlatformTransactionManager} 
   * bean definition. 
   */ 
  String value() default ""; 
 
  /** 
   * The transaction propagation type. 
   * Defaults to {@link Propagation#REQUIRED}. 
   * @see org.springframework.transaction.interceptor.TransactionAttribute#getPropagationBehavior() 
   */ 
  Propagation propagation() default Propagation.REQUIRED; 
 
  /** 
   * The transaction isolation level. 
   * Defaults to {@link Isolation#DEFAULT}. 
   * @see org.springframework.transaction.interceptor.TransactionAttribute#getIsolationLevel() 
   */ 
  Isolation isolation() default Isolation.DEFAULT; 
 
  /** 
   * The timeout for this transaction. 
   * Defaults to the default timeout of the underlying transaction system. 
   * @see org.springframework.transaction.interceptor.TransactionAttribute#getTimeout() 
   */ 
  int timeout() default TransactionDefinition.TIMEOUT_DEFAULT; 
 
  /** 
   * {@code true} if the transaction is read-only. 
   * Defaults to {@code false}. 
   * <p>This just serves as a hint for the actual transaction subsystem; 
   * it will <i>not necessarily</i> cause failure of write access attempts. 
   * A transaction manager which cannot interpret the read-only hint will 
   * <i>not</i> throw an exception when asked for a read-only transaction. 
   * @see org.springframework.transaction.interceptor.TransactionAttribute#isReadOnly() 
   */ 
  boolean readOnly() default false; 
 
  /** 
   * Defines zero (0) or more exception {@link Class classes}, which must be a 
   * subclass of {@link Throwable}, indicating which exception types must cause 
   * a transaction rollback. 
   * <p>This is the preferred way to construct a rollback rule, matching the 
   * exception class and subclasses. 
   * <p>Similar to {@link org.springframework.transaction.interceptor.RollbackRuleAttribute#RollbackRuleAttribute(Class clazz)} 
   */ 
  Class<? extends Throwable>[] rollbackFor() default {}; 
 
  /** 
   * Defines zero (0) or more exception names (for exceptions which must be a 
   * subclass of {@link Throwable}), indicating which exception types must cause 
   * a transaction rollback. 
   * <p>This can be a substring, with no wildcard support at present. 
   * A value of "ServletException" would match 
   * {@link javax.servlet.ServletException} and subclasses, for example. 
   * <p><b>NB: </b>Consider carefully how specific the pattern is, and whether 
   * to include package information (which isn&#39;t mandatory). For example, 
   * "Exception" will match nearly anything, and will probably hide other rules. 
   * "java.lang.Exception" would be correct if "Exception" was meant to define 
   * a rule for all checked exceptions. With more unusual {@link Exception} 
   * names such as "BaseBusinessException" there is no need to use a FQN. 
   * <p>Similar to {@link org.springframework.transaction.interceptor.RollbackRuleAttribute#RollbackRuleAttribute(String exceptionName)} 
   */ 
  String[] rollbackForClassName() default {}; 
 
  /** 
   * Defines zero (0) or more exception {@link Class Classes}, which must be a 
   * subclass of {@link Throwable}, indicating which exception types must <b>not</b> 
   * cause a transaction rollback. 
   * <p>This is the preferred way to construct a rollback rule, matching the 
   * exception class and subclasses. 
   * <p>Similar to {@link org.springframework.transaction.interceptor.NoRollbackRuleAttribute#NoRollbackRuleAttribute(Class clazz)} 
   */ 
  Class<? extends Throwable>[] noRollbackFor() default {}; 
 
  /** 
   * Defines zero (0) or more exception names (for exceptions which must be a 
   * subclass of {@link Throwable}) indicating which exception types must <b>not</b> 
   * cause a transaction rollback. 
   * <p>See the description of {@link #rollbackForClassName()} for more info on how 
   * the specified names are treated. 
   * <p>Similar to {@link org.springframework.transaction.interceptor.NoRollbackRuleAttribute#NoRollbackRuleAttribute(String exceptionName)} 
   */ 
  String[] noRollbackForClassName() default {}; 
 
}

 <beans:bean id="transactionManager" 
  class="org.springframework.orm.jpa.JpaTransactionManager"> 
  <beans:property name="dataSource" ref="dataSource" /> 
  <beans:property name="entityManagerFactory" ref="entityManagerFactory" /> 
</beans:bean> 
 
<!-- 声明使用注解式事务 --> 
<tx:annotation-driven transaction-manager="transactionManager" />