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jsowell-common/src/main/java/com/jsowell/common/util/id/IdUtils.java

@@ -97,16 +97,15 @@ public class IdUtils {
     }
 
     public static void main(String[] args) {
-        String pileSn = "13273881";
-        String connectorCode = "09";
-        String s = generateTransactionCode(pileSn, connectorCode);
-        System.out.println(s);
+        for (int i = 0; i < 20; i++) {
+            System.out.println(getOrderCode());
+        }
     }
 
     /**
      * 生成12位orderCode
      */
-    public static String getOrderCode() {
+    public static String getOrderCodeOld() {
         long id = Long.parseLong(SnowflakeIdWorker.getSnowflakeId());
         StringBuilder sb = new StringBuilder(id + "");
         StringBuilder reverse = sb.reverse();// 将id翻转：我们发现id很长，且高位很长部分是一样的数
@@ -117,6 +116,33 @@ public class IdUtils {
         return String.valueOf(id);
     }
 
+    /**
+     * 生成12位orderCode（纯字符串操作版本）
+     */
+    public static String getOrderCode() {
+        String snowflakeId = SnowflakeIdWorker.getSnowflakeId();
+
+        // 反转字符串
+        String reversed = new StringBuilder(snowflakeId).reverse().toString();
+
+        // 去掉最后3位（相当于除以1000）
+        if (reversed.length() > 3) {
+            reversed = reversed.substring(0, reversed.length() - 3);
+        }
+
+        // 如果长度超过12位，取前12位
+        if (reversed.length() > 12) {
+            reversed = reversed.substring(0, 12);
+        }
+
+        // 如果长度不足12位，前面补0
+        while (reversed.length() < 12) {
+            reversed = "0" + reversed;
+        }
+
+        return reversed;
+    }
+
     /**
      * 生成八位会员id
      */