订单、支付、退款、发货、退货等编号自动生成类

在商城网站中，订单编号的自动生成，ERP中各个单据的编号自动生成，都可以按照一下的方式来自动生成。
第一步：定义常量订单编号前缀、订单编号起始数、订单编号步长；
 
public 
 static 
 final 
 String ORDER_SN_PREFIX = 
 "";
 // 订单编号前缀 
 
  
 public 
 static 
 final 
 long ORDER_SN_FIRST = 100000L;
 // 订单编号起始数
 
  
 public 
 static 
 final 
 long ORDER_SN_STEP = 1L;
 // 订单编号步长 
第二步：定义订单的最后一个编号号码；
 
public 
 static Long lastOrderSnNumber;      
 //最后的订单编号号码
 
第三步：获取数据库中订单号为最后一个的订单编号，并赋值给lastOrderSnNumber
 
// 订单编号
 
   OrderService orderService = (OrderService) SpringUtil.getBean(
 "orderServiceImpl");
 
   
 String lastOrderSn = orderService.getLastOrderSn();
 
   
 if (StringUtils.isNotEmpty(lastOrderSn)) {
 
    lastOrderSnNumber = Long.parseLong(StringUtils.removeStartIgnoreCase(lastOrderSn, ORDER_SN_PREFIX));
 
   } 
 else {
 
    lastOrderSnNumber = ORDER_SN_FIRST;
 
   }
 
第四步：生成最新的订单号
 
/**
   * 生成订单编号
   * @return 订单编号
   */
 
  
 public 
 synchronized 
 static 
 String buildOrderSn() {
 
   lastOrderSnNumber += ORDER_SN_STEP;
 
   
 return ORDER_SN_PREFIX + lastOrderSnNumber;
 
  }
 
第五步：调用编号生成的方法
 

  order.setOrderSn(SerialNumberUtil.buildOrderSn());

 

个人一些看法，这些单据编号的自动生成，都是在写代码的时候定义好的，以后编号更改形式要是变了呢，是否可以改进，个人觉得应该可以改成配置的形式。
一个完整的类如下，在这里记下，为以后开发用：
 
package net.shopxx.util;
 
import java.util.UUID;
 
import net.shopxx.service.OrderService;
 
import net.shopxx.service.PaymentService;
 
import net.shopxx.service.RefundService;
 
import net.shopxx.service.ReshipService;
 
import net.shopxx.service.ShippingService;
 
import org.apache.commons.lang3.StringUtils;
 
/**
  * 工具类 - 编号生成
  */
 
public 
 class SerialNumberUtil {
 
  
 
  
 public 
 static 
 final 
 String PRODUCT_SN_PREFIX = 
 "SN_";
 // 货号前缀
 
  
 
  
 public 
 static 
 final 
 String ORDER_SN_PREFIX = 
 "";
 // 订单编号前缀 
 
  
 public 
 static 
 final 
 long ORDER_SN_FIRST = 100000L;
 // 订单编号起始数
 
  
 public 
 static 
 final 
 long ORDER_SN_STEP = 1L;
 // 订单编号步长
 
  
 
  
 public 
 static 
 final 
 String PAYMENT_SN_PREFIX = 
 "";
 // 支付编号前缀
 
  
 public 
 static 
 final 
 long PAYMENT_SN_FIRST = 100000L;
 // 支付编号起始数
 
  
 public 
 static 
 final 
 long PAYMENT_SN_STEP = 1L;
 // 支付编号步长
 
  
 
  
 public 
 static 
 final 
 String REFUND_SN_PREFIX = 
 "";
 // 退款编号前缀
 
  
 public 
 static 
 final 
 long REFUND_SN_FIRST = 100000L;
 // 退款编号起始数
 
  
 public 
 static 
 final 
 long REFUND_SN_STEP = 1L;
 // 退款编号步长
 
  
 
  
 public 
 static 
 final 
 String SHIPPING_SN_PREFIX = 
 "";
 // 发货编号前缀
 
  
 public 
 static 
 final 
 long SHIPPING_SN_FIRST = 100000L;
 // 发货编号起始数
 
  
 public 
 static 
 final 
 long SHIPPING_SN_STEP = 1L;
 // 发货编号步长
 
  
 
  
 public 
 static 
 final 
 String RESHIP_SN_PREFIX = 
 "";
 // 退货编号前缀
 
  
 public 
 static 
 final 
 long RESHIP_SN_FIRST = 100000L;
 // 退货编号起始数
 
  
 public 
 static 
 final 
 long RESHIP_SN_STEP = 1L;
 // 退货编号步长
 
  
 
  
 public 
 static Long lastOrderSnNumber;      
 //最后的订单编号号码
 
  
 public 
 static Long lastPaymentSnNumber;
 
  
 public 
 static Long lastRefundSnNumber;
 
  
 public 
 static Long lastShippingSnNumber;
 
  
 public 
 static Long lastReshipSnNumber;
 
  
 public 
 static Long lastTenpayTransactionIdNumber;
 
  
 static {
 
   
 // 订单编号
 
   OrderService orderService = (OrderService) SpringUtil.getBean(
 "orderServiceImpl");
 
   
 String lastOrderSn = orderService.getLastOrderSn();
 
   
 if (StringUtils.isNotEmpty(lastOrderSn)) {
 
    lastOrderSnNumber = Long.parseLong(StringUtils.removeStartIgnoreCase(lastOrderSn, ORDER_SN_PREFIX));
 
   } 
 else {
 
    lastOrderSnNumber = ORDER_SN_FIRST;
 
   }
 
   
 
   
 // 支付编号
 
   PaymentService paymentService = (PaymentService) SpringUtil.getBean(
 "paymentServiceImpl");
 
   
 String lastPaymentSn = paymentService.getLastPaymentSn();
 
   
 if (StringUtils.isNotEmpty(lastPaymentSn)) {
 
    lastPaymentSnNumber = Long.parseLong(StringUtils.removeStartIgnoreCase(lastPaymentSn, PAYMENT_SN_PREFIX));
 
   } 
 else {
 
    lastPaymentSnNumber = PAYMENT_SN_FIRST;
 
   }
 
   
 
   
 // 退款编号
 
   RefundService refundService = (RefundService) SpringUtil.getBean(
 "refundServiceImpl");
 
   
 String lastRefundSn = refundService.getLastRefundSn();
 
   
 if (StringUtils.isNotEmpty(lastRefundSn)) {
 
    lastRefundSnNumber = Long.parseLong(StringUtils.removeStartIgnoreCase(lastRefundSn, REFUND_SN_PREFIX));
 
   } 
 else {
 
    lastRefundSnNumber = REFUND_SN_FIRST;
 
   }
 
   
 
   
 // 发货编号
 
   ShippingService shippingService = (ShippingService) SpringUtil.getBean(
 "shippingServiceImpl");
 
   
 String lastShippingSn = shippingService.getLastShippingSn();
 
   
 if (StringUtils.isNotEmpty(lastShippingSn)) {
 
    lastShippingSnNumber = Long.parseLong(StringUtils.removeStartIgnoreCase(lastShippingSn, SHIPPING_SN_PREFIX));
 
   } 
 else {
 
    lastShippingSnNumber = SHIPPING_SN_FIRST;
 
   }
 
   
 
   
 // 退货编号
 
   ReshipService reshipService = (ReshipService) SpringUtil.getBean(
 "reshipServiceImpl");
 
   
 String lastReshipSn = reshipService.getLastReshipSn();
 
   
 if (StringUtils.isNotEmpty(lastReshipSn)) {
 
    lastReshipSnNumber = Long.parseLong(StringUtils.removeStartIgnoreCase(lastReshipSn, RESHIP_SN_PREFIX));
 
   } 
 else {
 
    lastReshipSnNumber = RESHIP_SN_FIRST;
 
   }
 
  }
 
  
 
  
 /**
   * 生成货号
   * 
   * @return 货号
   */
 
  
 public 
 static 
 String buildProductSn() {
 
   
 String uuid = UUID.randomUUID().
 toString();
 
   
 return PRODUCT_SN_PREFIX + (uuid.substring(0, 8) + uuid.substring(9, 13)).toUpperCase();
 
  }
 
  
 
  
 /**
   * 生成订单编号
   * @return 订单编号
   */
 
  
 public 
 synchronized 
 static 
 String buildOrderSn() {
 
   lastOrderSnNumber += ORDER_SN_STEP;
 
   
 return ORDER_SN_PREFIX + lastOrderSnNumber;
 
  }
 
  
 
  
 /**
   * 生成支付编号
   * @return 支付编号
   */
 
  
 public 
 synchronized 
 static 
 String buildPaymentSn() {
 
   lastPaymentSnNumber += PAYMENT_SN_STEP;
 
   
 return PAYMENT_SN_PREFIX + lastPaymentSnNumber;
 
  }
 
  
 
  
 /**
   * 生成退款编号
   * 
   * @return 退款编号
   */
 
  
 public 
 synchronized 
 static 
 String buildRefundSn() {
 
   lastRefundSnNumber += REFUND_SN_STEP;
 
   
 return REFUND_SN_PREFIX + lastRefundSnNumber;
 
  }
 
  
 
  
 /**
   * 生成发货编号
   * 
   * @return 发货编号
   */
 
  
 public 
 synchronized 
 static 
 String buildShippingSn() {
 
   lastShippingSnNumber += SHIPPING_SN_STEP;
 
   
 return SHIPPING_SN_PREFIX + lastShippingSnNumber;
 
  }
 
  
 
  
 /**
   * 生成退货编号
   * 
   * @return 退货编号
   */
 
  
 public 
 synchronized 
 static 
 String buildReshipSn() {
 
   lastReshipSnNumber += RESHIP_SN_STEP;
 
   
 return RESHIP_SN_PREFIX + lastReshipSnNumber;
 
  }
 
 }