TransactionIDService.java

package org.xmx0632.deliciousfruit.service;

import java.util.Date;
import java.util.concurrent.atomic.AtomicLong;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.xmx0632.deliciousfruit.utilities.date.DateUtil;

//Spring Bean的标识.
@Component
public class TransactionIDService {

	private static Logger log = LoggerFactory
			.getLogger(TransactionIDService.class);

	private AtomicLong index = new AtomicLong(0);

	private String pattern = "yyyy-MM-dd HH";

	@Autowired
	private DateUtil dateUtil;

	public String getTransactionId() {
		Date currentTime = dateUtil.getCurrentDate(pattern);
		long time = currentTime.getTime();
		String transactionId = "" + time + index.getAndIncrement();
		log.debug("transactionId:{}", transactionId);
		return transactionId;
	}
}