1. 提高 databus api 的网络失败重试次数，避免复用旧链接导致的 connection reset 错误

2. 兼容顶级组织同步时的组织编码生成逻辑

zt-module-databus/zt-module-databus-server/src/main/java/com/zt/plat/module/databus/framework/integration/gateway/step/impl/HttpStepHandler.java

@@ -47,6 +47,7 @@ public class HttpStepHandler implements ApiStepHandler {
     private final ExpressionExecutor expressionExecutor;
 
     private static final Duration RETRY_DELAY = Duration.ofMillis(200);
+    private static final int RETRY_ATTEMPTS = 3;
 
     private static final Set<String> DEFAULT_FORWARDED_HEADERS = Set.of(
         "authorization",
@@ -388,7 +389,7 @@ public class HttpStepHandler implements ApiStepHandler {
     }
 
     private Mono<Object> applyResilientRetry(Mono<Object> responseMono, ApiStepDefinition stepDefinition) {
-        return responseMono.retryWhen(Retry.fixedDelay(1, RETRY_DELAY)
+        return responseMono.retryWhen(Retry.fixedDelay(RETRY_ATTEMPTS, RETRY_DELAY)
                 .filter(this::isRetryableException)
                 .doBeforeRetry(signal -> {
                     if (log.isWarnEnabled()) {

zt-module-system/zt-module-system-api/src/main/java/com/zt/plat/module/system/enums/ErrorCodeConstants.java

@@ -57,7 +57,7 @@ public interface ErrorCodeConstants {
     ErrorCode USER_REGISTER_DISABLED = new ErrorCode(1_002_003_011, "注册功能已关闭");
 
     // ========== 部门模块 1-002-004-000 ==========
-    ErrorCode DEPT_NAME_DUPLICATE = new ErrorCode(1_002_004_000, "已经存在该名字的部门");
+    ErrorCode DEPT_NAME_DUPLICATE = new ErrorCode(1_002_004_000, "当前上级部门已存在同名子部门");
     ErrorCode DEPT_PARENT_NOT_EXITS = new ErrorCode(1_002_004_001,"父级部门不存在");
     ErrorCode DEPT_NOT_FOUND = new ErrorCode(1_002_004_002, "机构不存在或当前账号无权限修改");
     ErrorCode DEPT_EXITS_CHILDREN = new ErrorCode(1_002_004_003, "存在子部门，无法删除");

zt-module-system/zt-module-system-server/src/main/java/com/zt/plat/module/system/service/dept/DeptServiceImpl.java

@@ -71,9 +71,16 @@ public class DeptServiceImpl implements DeptService {
         // 校验部门名的唯一性
         validateDeptNameUnique(null, createReqVO.getParentId(), createReqVO.getName());
         // 生成并校验部门编码
-        String generatedCode = generateDeptCode(createReqVO.getParentId());
+        Long effectiveParentId = normalizeParentId(createReqVO.getParentId());
-        createReqVO.setCode(generatedCode);
+        boolean isTopLevel = Objects.equals(effectiveParentId, DeptDO.PARENT_ID_ROOT);
-        validateDeptCodeUnique(null, generatedCode);
+        String resolvedCode;
+        if (isTopLevel) {
+            resolvedCode = resolveTopLevelCode(null, createReqVO.getCode());
+        } else {
+            resolvedCode = generateDeptCode(effectiveParentId);
+            validateDeptCodeUnique(null, resolvedCode);
+        }
+        createReqVO.setCode(resolvedCode);
 
         // 插入部门
         DeptDO dept = BeanUtils.toBean(createReqVO, DeptDO.class);
@@ -104,11 +111,26 @@ public class DeptServiceImpl implements DeptService {
         Long oldParentId = normalizeParentId(originalDept.getParentId());
         boolean parentChanged = !Objects.equals(newParentId, oldParentId);
         if (parentChanged) {
-            String newCode = generateDeptCode(updateReqVO.getParentId());
+            String newCode;
+            if (Objects.equals(newParentId, DeptDO.PARENT_ID_ROOT)) {
+                newCode = resolveTopLevelCode(updateReqVO.getId(), updateReqVO.getCode());
+            } else {
+                newCode = generateDeptCode(updateReqVO.getParentId());
+                validateDeptCodeUnique(updateReqVO.getId(), newCode);
+            }
             updateReqVO.setCode(newCode);
+        } else {
+            if (Objects.equals(newParentId, DeptDO.PARENT_ID_ROOT)) {
+                String requestedCode = updateReqVO.getCode();
+                if (StrUtil.isNotBlank(requestedCode) && !StrUtil.equals(requestedCode.trim(), originalDept.getCode())) {
+                    updateReqVO.setCode(resolveTopLevelCode(updateReqVO.getId(), requestedCode));
                 } else {
                     updateReqVO.setCode(originalDept.getCode());
                 }
+            } else {
+                updateReqVO.setCode(originalDept.getCode());
+            }
+        }
 
         // 更新部门
         DeptDO updateObj = BeanUtils.toBean(updateReqVO, DeptDO.class);
@@ -189,7 +211,11 @@ public class DeptServiceImpl implements DeptService {
 
     @VisibleForTesting
     void validateDeptNameUnique(Long id, Long parentId, String name) {
-        DeptDO dept = deptMapper.selectByParentIdAndName(parentId, name);
+        Long effectiveParentId = normalizeParentId(parentId);
+        if (Objects.equals(effectiveParentId, DeptDO.PARENT_ID_ROOT)) {
+            return;
+        }
+        DeptDO dept = deptMapper.selectByParentIdAndName(effectiveParentId, name);
         if (dept == null) {
             return;
         }
@@ -312,6 +338,18 @@ public class DeptServiceImpl implements DeptService {
         deptMapper.updateById(update);
     }
 
+    private String resolveTopLevelCode(Long currentDeptId, String requestedCode) {
+        String candidate = requestedCode;
+        if (candidate != null) {
+            candidate = candidate.trim();
+        }
+        if (StrUtil.isBlank(candidate)) {
+            candidate = generateDeptCode(DeptDO.PARENT_ID_ROOT);
+        }
+        validateDeptCodeUnique(currentDeptId, candidate);
+        return candidate;
+    }
+
     @Override
     public DeptDO getDept(Long id) {
         return deptMapper.selectById(id);