java生成订单编号工具

直接code，用了线程执行，加上了锁

public class TestOrder extends Thread{

	 private static long orderNum = 0l;  
	    private static String date ;  
	      
	    public static void main(String[] args) throws InterruptedException {  
	        for (int i = 0; i < 10000; i++) {  
	            System.out.println(TestOrder.getOrderNo());  
	            Thread.sleep(1000);  
	        }  
	    }  
	  
	    /** 
	     * 生成订单编号 
	     * @return 
	     */  
	    public static synchronized String getOrderNo() {  
	        String str = new SimpleDateFormat("yyMMddHHmm").format(new Date());  
	        if(date==null||!date.equals(str)){  
	            date = str;  
	            orderNum  = 0l;  
	        }  
	        orderNum ++;  
	        long orderNo = Long.parseLong((date)) * 10000;  
	        orderNo += orderNum;;  
	        return orderNo+"";  
	    }  
}