fix: 放弃Jackson多态，改用普通DTO避免type序列化冲突

- SegmentConfig改为普通POJO，移除@JsonTypeInfo和子类
- CodeGenServiceImpl/SequenceAllocator直接用SegmentConfig
- 彻底消除type字段序列化/反序列化的冲突问题

nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/CodeGenServiceImpl.java

@@ -1,10 +1,7 @@
 package cn.code.nl.module.base.service.codegen;
 
 import cn.code.nl.module.base.dal.dataobject.codegen.CodeRuleDO;
-import cn.code.nl.module.base.service.codegen.dto.DateSegment;
-import cn.code.nl.module.base.service.codegen.dto.PrefixSegment;
 import cn.code.nl.module.base.service.codegen.dto.SegmentConfig;
-import cn.code.nl.module.base.service.codegen.dto.SequenceSegment;
 import cn.code.nl.module.base.service.codegen.enums.LetterCaseEnum;
 import cn.code.nl.module.base.service.codegen.enums.SeqStrategyEnum;
 import cn.hutool.core.util.StrUtil;
@@ -61,27 +58,25 @@ public class CodeGenServiceImpl implements CodeGenService {
      * 根据段类型分发处理，生成段值
      */
     private String buildSegment(CodeRuleDO rule, SegmentConfig segment) {
-        if (segment instanceof PrefixSegment) {
+        return switch (segment.getType()) {
-            return buildPrefixSegment((PrefixSegment) segment);
+            case "PREFIX" -> buildPrefixSegment(segment);
-        } else if (segment instanceof DateSegment) {
+            case "DATE" -> buildDateSegment(segment);
-            return buildDateSegment((DateSegment) segment);
+            case "SEQUENCE" -> buildSequenceSegment(rule, segment);
-        } else if (segment instanceof SequenceSegment) {
+            default -> throw new IllegalArgumentException("不支持的段类型: " + segment.getType());
-            return buildSequenceSegment(rule, (SequenceSegment) segment);
+        };
-        }
-        throw new IllegalArgumentException("不支持的段类型: " + segment.getClass().getSimpleName());
     }
 
     /**
      * 生成固定前缀段
      */
-    private String buildPrefixSegment(PrefixSegment segment) {
+    private String buildPrefixSegment(SegmentConfig segment) {
         return segment.getValue() != null ? segment.getValue() : "";
     }
 
     /**
      * 生成日期段
      */
-    private String buildDateSegment(DateSegment segment) {
+    private String buildDateSegment(SegmentConfig segment) {
         String format = StrUtil.isNotBlank(segment.getFormat())
                 ? segment.getFormat() : "yyyyMMdd";
         return LocalDate.now().format(DateTimeFormatter.ofPattern(format));
@@ -90,7 +85,7 @@ public class CodeGenServiceImpl implements CodeGenService {
     /**
      * 生成流水序号段
      */
-    private String buildSequenceSegment(CodeRuleDO rule, SequenceSegment segment) {
+    private String buildSequenceSegment(CodeRuleDO rule, SegmentConfig segment) {
         String strategy = rule.getSeqStrategy();
         if (SeqStrategyEnum.LOCK.getCode().equals(strategy)) {
             return sequenceAllocator.allocateByLock(rule.getId(), segment);

nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/SequenceAllocator.java

@@ -2,7 +2,7 @@ package cn.code.nl.module.base.service.codegen;
 
 import cn.code.nl.module.base.dal.dataobject.codegen.CodeSequenceDO;
 import cn.code.nl.module.base.dal.mysql.codegen.CodeSequenceMapper;
-import cn.code.nl.module.base.service.codegen.dto.SequenceSegment;
+import cn.code.nl.module.base.service.codegen.dto.SegmentConfig;
 import cn.code.nl.module.base.service.codegen.enums.ResetByEnum;
 import cn.hutool.core.util.StrUtil;
 import com.baomidou.lock.annotation.Lock4j;
@@ -57,7 +57,7 @@ public class SequenceAllocator {
      * @param segment 序号段配置
      * @return 格式化后的序号字符串
      */
-    public String allocateBySegment(Long ruleId, SequenceSegment segment) {
+    public String allocateBySegment(Long ruleId, SegmentConfig segment) {
         String resetKey = buildResetKey(segment.getResetBy());
         String cacheKey = ruleId + ":" + resetKey;
 
@@ -87,7 +87,7 @@ public class SequenceAllocator {
      * @param segment 序号段配置
      * @return 格式化后的序号字符串
      */
-    public String allocateByLock(Long ruleId, SequenceSegment segment) {
+    public String allocateByLock(Long ruleId, SegmentConfig segment) {
         String resetKey = buildResetKey(segment.getResetBy());
         String lockKey = "codegen:seq:lock:" + ruleId + ":" + resetKey;
         return self.allocateWithLock(lockKey, ruleId, resetKey, segment);
@@ -98,7 +98,7 @@ public class SequenceAllocator {
      */
     @Lock4j(keys = "#lockKey", acquireTimeout = 3000, expire = 5000)
     public long fetchSegmentWithLock(String lockKey, String cacheKey, Long ruleId,
-                                      String resetKey, SequenceSegment segment) {
+                                      String resetKey, SegmentConfig segment) {
         // double-check：其他线程可能已经预取了
         AtomicLong existing = localSegmentCache.get(cacheKey);
         if (existing != null) {
@@ -136,7 +136,7 @@ public class SequenceAllocator {
      * Lock4j 保护下实时分配序号
      */
     @Lock4j(keys = "#lockKey", acquireTimeout = 3000, expire = 5000)
-    public String allocateWithLock(String lockKey, Long ruleId, String resetKey, SequenceSegment segment) {
+    public String allocateWithLock(String lockKey, Long ruleId, String resetKey, SegmentConfig segment) {
         Long startAt = segment.getStartAt() != null ? segment.getStartAt() : 1L;
         // step=1 每次只取一个号
         codeSequenceMapper.updateCurrentValueBySegment(ruleId, resetKey, 1, startAt, segment.getMaxValue());
@@ -178,7 +178,7 @@ public class SequenceAllocator {
      * @param segment 序号段配置
      * @return 格式化后的字符串
      */
-    public String formatSequence(long value, SequenceSegment segment) {
+    public String formatSequence(long value, SegmentConfig segment) {
         String raw = String.valueOf(value);
         int paddingLen = segment.getPaddingLen() != null ? segment.getPaddingLen() : 0;
         if (paddingLen <= 0 || raw.length() >= paddingLen) {

nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/DateSegment.java

@@ -1,20 +0,0 @@
-package cn.code.nl.module.base.service.codegen.dto;
-
-import lombok.Data;
-import lombok.EqualsAndHashCode;
-
-/**
- * 日期段配置
- *
- * @author zhouz
- */
-@Data
-@EqualsAndHashCode(callSuper = true)
-public class DateSegment extends SegmentConfig {
-
-    /**
-     * 日期格式，如 "yyyyMMdd"、"yyyyMM"、"yyyy"
-     */
-    private String format;
-
-}

nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/PrefixSegment.java

@@ -1,20 +0,0 @@
-package cn.code.nl.module.base.service.codegen.dto;
-
-import lombok.Data;
-import lombok.EqualsAndHashCode;
-
-/**
- * 固定前缀段配置
- *
- * @author zhouz
- */
-@Data
-@EqualsAndHashCode(callSuper = true)
-public class PrefixSegment extends SegmentConfig {
-
-    /**
-     * 固定前缀值，如 "ORD"
-     */
-    private String value;
-
-}

nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/SegmentConfig.java

@@ -1,22 +1,60 @@
 package cn.code.nl.module.base.service.codegen.dto;
 
-import com.fasterxml.jackson.annotation.JsonSubTypes;
-import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import lombok.Data;
 
 /**
- * 分段配置基类，使用 Jackson 多态序列化/反序列化。
+ * 分段配置 —— 通用 DTO，不做 Jackson 多态。
- * 注意：type 字段由 @JsonTypeInfo 自动管理，不要在子类中重复定义，
+ * type 决定了哪些字段有效：PREFIX→value, DATE→format, SEQUENCE→resetBy/startAt/paddingLen/paddingChar/maxValue
- * 否则会导致序列化时 type 被覆盖为 null，反序列化时找不到子类型。
  *
  * @author zhouz
  */
 @Data
-@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type", visible = true)
+public class SegmentConfig {
-@JsonSubTypes({
+
-    @JsonSubTypes.Type(value = PrefixSegment.class, name = "PREFIX"),
+    /**
-    @JsonSubTypes.Type(value = DateSegment.class, name = "DATE"),
+     * 段类型：PREFIX / DATE / SEQUENCE
-    @JsonSubTypes.Type(value = SequenceSegment.class, name = "SEQUENCE")
+     */
-})
+    private String type;
-public abstract class SegmentConfig {
+
+    // ========== PREFIX 段 ==========
+
+    /**
+     * 固定值，如 "ORD"
+     */
+    private String value;
+
+    // ========== DATE 段 ==========
+
+    /**
+     * 日期格式，如 "yyyyMMdd"
+     */
+    private String format;
+
+    // ========== SEQUENCE 段 ==========
+
+    /**
+     * 重置维度：DAY / MONTH / YEAR / GLOBAL
+     */
+    private String resetBy;
+
+    /**
+     * 起始值，默认 1
+     */
+    private Long startAt;
+
+    /**
+     * 补位后的总长度，如 4 → 0001
+     */
+    private Integer paddingLen;
+
+    /**
+     * 补位字符，默认 "0"
+     */
+    private String paddingChar;
+
+    /**
+     * 序号最大值上限
+     */
+    private Long maxValue;
+
 }

nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/SequenceSegment.java

@@ -1,40 +0,0 @@
-package cn.code.nl.module.base.service.codegen.dto;
-
-import lombok.Data;
-import lombok.EqualsAndHashCode;
-
-/**
- * 流水序号段配置
- *
- * @author zhouz
- */
-@Data
-@EqualsAndHashCode(callSuper = true)
-public class SequenceSegment extends SegmentConfig {
-
-    /**
-     * 重置维度：DAY / MONTH / YEAR / GLOBAL
-     */
-    private String resetBy;
-
-    /**
-     * 起始值，默认 1
-     */
-    private Long startAt;
-
-    /**
-     * 补位后的总长度，如 4 → 0001
-     */
-    private Integer paddingLen;
-
-    /**
-     * 补位字符，默认 "0"
-     */
-    private String paddingChar;
-
-    /**
-     * 序号最大值上限
-     */
-    private Long maxValue;
-
-}