//事務註解用法
@Transactional(readOnly = false, propagation = Propagation.REQUIRED,rollbackFor=Exception.class,timeout=10)
public void save(Goods goods) throws Exception {...}

除了 propagation 其它幾個屬性都是字面意思，下面就看下 propagation 吧

/*
 * Copyright 2002-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 


package org.springframework.transaction.annotation;

import org.springframework.transaction.TransactionDefinition;

/**
 * Enumeration that represents transaction propagation behaviors for use
 * with the {@link Transactional} annotation, corresponding to the
 * {@link TransactionDefinition} interface.
 *
 * @author Colin Sampaleanu
 * @author Juergen Hoeller
 * @since 1.2
 */
 

public enum Propagation {

	/**
	 * 你有事務我就用你的，你沒有我就自己建立一個，反正老子就是要事務。
	 */
	REQUIRED(TransactionDefinition.PROPAGATION_REQUIRED),

	/**
	 * 你有事務我就用你的，你沒有就算了，我不稀罕。
	 */
	SUPPORTS(TransactionDefinition.PROPAGATION_SUPPORTS),

	/**
	 * 你沒事務還敢呼叫老子，異常走你~~~~
	 */
	MANDATORY(TransactionDefinition.PROPAGATION_MANDATORY)
 
,

	/**
	 * 老子不管你那套，你有事務是你的事，一邊待著。老子自己得建立自己的事務。
	 */
	REQUIRES_NEW(TransactionDefinition.PROPAGATION_REQUIRES_NEW),

	/**
	 * 老子不要事務，你呼叫我就了不起啊，讓你事務一邊待著去。
	 */
	NOT_SUPPORTED(TransactionDefinition.PROPAGATION_NOT_SUPPORTED),

	/**
	 * 老子說了不要事務你還來，異常走你~~~~~~~~~~~
	 */
	NEVER(TransactionDefinition.PROPAGATION_NEVER),

	/**
	 * 先說好，你有沒有事務，咱們都井水不犯河水。我的事務我說了算，我提交、回滾與你無關。
	 */
	NESTED(TransactionDefinition.PROPAGATION_NESTED);

	private final int value;

	Propagation(int value) { this.value = value; }

	public int value() { return this.value; }

}