diff --git a/jsowell-admin/src/test/java/SpringBootTestController.java b/jsowell-admin/src/test/java/SpringBootTestController.java
index b97e9a80a..6a2a36f81 100644
--- a/jsowell-admin/src/test/java/SpringBootTestController.java
+++ b/jsowell-admin/src/test/java/SpringBootTestController.java
@@ -283,6 +283,18 @@ public class SpringBootTestController {
 		System.out.println(JSON.toJSONString(list));
 	}
 
+	@Test
+	public void testGeneratePileSn() {
+		// String key = CacheConstants.PILE_SN_GENERATE_KEY + "88";
+		// redisCache.setCacheObject(key, null);
+		// Long pileNum = redisCache.getCacheLong(key);
+		// System.out.println(pileNum);
+
+		snUtils.getPileSn("88");
+		// List<String> list = snUtils.generateSN(2);
+		// System.out.println(list);
+	}
+
 	@Test
 	public void testGenerateOccupyPileOrder() {
 		String memberId = "67569684";
diff --git a/jsowell-common/src/main/java/com/jsowell/common/core/redis/RedisCache.java b/jsowell-common/src/main/java/com/jsowell/common/core/redis/RedisCache.java
index 8f135f55d..2a4aa935e 100644
--- a/jsowell-common/src/main/java/com/jsowell/common/core/redis/RedisCache.java
+++ b/jsowell-common/src/main/java/com/jsowell/common/core/redis/RedisCache.java
@@ -168,6 +168,9 @@ public class RedisCache {
 	public Long getCacheLong(final String key) {
 		Long l = null;
 		Object cacheObject = getCacheObject(key);
+		if (Objects.isNull(cacheObject)) {
+			return null;
+		}
 		if (cacheObject instanceof Integer) {
 			l = ((Integer) cacheObject).longValue();
 		} else if (cacheObject instanceof Long) {
diff --git a/jsowell-pile/src/main/java/com/jsowell/pile/util/SnUtils.java b/jsowell-pile/src/main/java/com/jsowell/pile/util/SnUtils.java
index 54f67961d..b496c0be4 100644
--- a/jsowell-pile/src/main/java/com/jsowell/pile/util/SnUtils.java
+++ b/jsowell-pile/src/main/java/com/jsowell/pile/util/SnUtils.java
@@ -36,20 +36,22 @@ public class SnUtils {
 	 * @param prefix 生成序列号的前缀
 	 * @return
 	 */
-	private String getPileSn(String prefix) {
+	public String getPileSn(String prefix) {
 		//序列号前缀加特定标识，如系统模块名之类的 防止重复
 		String key = CacheConstants.PILE_SN_GENERATE_KEY + prefix;
 		String increResult = null;
 		try {
-			String pileNum = redisCache.getCacheObject(key);
-			if (StringUtils.isBlank(pileNum)) {
+			// 取缓存
+			Integer pileNum = redisCache.getCacheObject(key);
+			if (pileNum == null) {
 				// 缓存中没有，从数据库中取
 				PileBasicInfo pileInfo = pileBasicInfoService.getMaxNumPileInfo();
 				String pileSn = pileInfo.getSn();
 				// 将前四位截取，并将后面转为long
-				long pileSnNum = Long.parseLong(StringUtils.substring(pileSn, 4, pileSn.length()));
+				Long pileSnNum = Long.parseLong(StringUtils.substring(pileSn, 4, pileSn.length()));
+				// String pileSnNum = StringUtils.substring(pileSn, 4, pileSn.length());
 				// 再将该值存入数据库
-				redisCache.setCacheObject(key, pileSnNum);
+				redisCache.setCacheObject(key, pileSnNum.intValue());
 
 			}
 			Long increNum = redisCache.increment(key, 1);
@@ -64,11 +66,13 @@ public class SnUtils {
 	}
 
 	public static void main(String[] args) {
-		String pileSn = "88230000002060";
-		String substring = StringUtils.substring(pileSn, 4, pileSn.length());
-		long l = Long.parseLong(substring);
-		System.out.println(substring);
-		System.out.println(l);
+		// String pileSn = "88230000002060";
+		// String substring = StringUtils.substring(pileSn, 4, pileSn.length());
+		// long l = Long.parseLong(substring);
+		// System.out.println(substring);
+		// System.out.println(l);
+
+		Long a = 3147483647L;
 	}
 
 	/**
diff --git a/jsowell-pile/src/main/resources/mapper/pile/PileBasicInfoMapper.xml b/jsowell-pile/src/main/resources/mapper/pile/PileBasicInfoMapper.xml
index 1087f3bad..3d1f595f5 100644
--- a/jsowell-pile/src/main/resources/mapper/pile/PileBasicInfoMapper.xml
+++ b/jsowell-pile/src/main/resources/mapper/pile/PileBasicInfoMapper.xml
@@ -402,9 +402,12 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 
     <select id="getMaxNumPileInfo" resultMap="PileBasicInfoResult">
         select
-            max(id),
+            id,
             sn
         from
             pile_basic_info
+        order by
+            id desc
+        limit 1
     </select>
 </mapper>
\ No newline at end of file