优化

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/controller/SmartDispatchController.java

@@ -28,8 +28,9 @@ public class SmartDispatchController {
     @PreAuthorize("hasAuthority('"+OverseasPermissions.DISPATCH_LIST+"')")
     public ApiResponse<CandidateList> candidates(@AuthenticationPrincipal AuthenticatedUser user,@RequestParam String warehouseId,
         @RequestParam(required=false)List<Long> planIds,@RequestParam(required=false)String orderNo,
-        @RequestParam(required=false)String destinationWarehouseCode,@RequestParam(required=false)String sourceStage,@RequestParam(required=false)String draftToken) {
-        return ApiResponse.success(aggregate.candidates(DispatchActorFactory.platform(user),new CandidateQuery(warehouseId,planIds,orderNo,destinationWarehouseCode,sourceStage,draftToken)));
+        @RequestParam(required=false)String destinationWarehouseCode,@RequestParam(required=false)String sourceStage,@RequestParam(required=false)String draftToken,
+        @RequestParam(defaultValue="1")int page,@RequestParam(defaultValue="20")int size,@RequestParam(defaultValue="ALL")String warehouseTab) {
+        return ApiResponse.success(aggregate.candidates(DispatchActorFactory.platform(user),new CandidateQuery(warehouseId,planIds,orderNo,destinationWarehouseCode,sourceStage,draftToken,page,size,warehouseTab)));
     }
     /** 只列出当前拥有者未失效草稿。 */
     @GetMapping("/drafts")

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/mapper/DispatchCandidatePageMapper.java

@@ -0,0 +1,59 @@
+package com.baiyue.lastleg.dispatch.mapper;
+
+import com.baiyue.lastleg.dispatch.model.DispatchPalletCandidate;
+import com.baiyue.lastleg.dispatch.port.DispatchPlanningModels.CandidateQuery;
+import org.apache.ibatis.annotations.*;
+import java.util.*;
+import java.util.stream.Collectors;
+
+/** 四种来源共用数据库分页；页外来源不进入测量、完整组和预约的逐组装配。 */
+@Mapper
+public interface DispatchCandidatePageMapper {
+    /** 统计相同筛选下的来源行，不把当前页条数当全仓总数。 */
+    @SelectProvider(type=Sql.class,method="count")
+    long count(@Param("query")CandidateQuery query);
+    /** 稳定排序后在数据库限页，完整组可包含页外成员。 */
+    @SelectProvider(type=Sql.class,method="page")
+    List<DispatchPalletCandidate> page(@Param("query")CandidateQuery query,@Param("offset")long offset);
+
+    /** 复用既有资格SQL，只统一各来源投影的列序，不复制资格或客户隔离规则。 */
+    final class Sql {
+        private static final String FIELDS="planId,planPalletId,warehousePalletId,orderId,customerId,customerName,planNo,orderType,volumeWeightKg,grossWeightKg,containerNo,appointmentAt,expectedLoadingAt,overseasWarehouseId,overseasWarehouseCode,overseasWarehouseName,orderNo,orderRefs,inboundCode,palletNo,destinationWarehouseId,destinationWarehouseCode,destinationWarehouseName,fbaWarehouseCode,packageCount,volumeCbm,sourceStage,cartonMarks,relabelCartonMarks,destinationType,deliveryAddress,postalCode,contactName,contactPhone,returnReceiptId,returnReceiptNo,returnCartonSource";
+        private static final Set<String> PLAN_MISSING=Set.of("returnReceiptId","returnReceiptNo","returnCartonSource");
+        private static final Set<String> RETURN_FIELDS=Set.of(("returnReceiptId,returnReceiptNo,orderId,customerId,customerName,orderType,orderNo,orderRefs,inboundCode,warehousePalletId,palletNo,overseasWarehouseId,overseasWarehouseName,overseasWarehouseCode,destinationType,destinationWarehouseCode,fbaWarehouseCode,destinationWarehouseName,deliveryAddress,postalCode,contactName,contactPhone,sourceStage,packageCount").split(","));
+        private static final Set<String> NATIVE_FIELDS=Set.of(("customerId,orderId,overseasWarehouseId,overseasWarehouseName,orderType,orderNo,orderRefs,inboundCode,palletNo,packageCount,sourceStage,returnCartonSource,relabelCartonMarks,fbaWarehouseCode,grossWeightKg,volumeCbm,destinationWarehouseCode").split(","));
+        private static final String BINDINGS="<bind name='customerId' value='null'/><bind name='relabelNo' value='null'/>"
+            +"<bind name='planIds' value='query.planIds'/><bind name='orderNo' value='query.orderNo'/>"
+            +"<bind name='fbaWarehouseCode' value='query.destinationWarehouseCode'/><bind name='fba' value='query.destinationWarehouseCode'/>"
+            +"<bind name='sourceStage' value='query.sourceStage'/><bind name='draftToken' value='query.draftToken'/>";
+        /** 来源字段缺省仅表示该来源没有此字段，不伪造业务编号或实托身份。 */
+        private static String project(String body,Set<String> fields) {
+            return "SELECT "+Arrays.stream(FIELDS.split(",")).map(field->fields.contains(field)?"s."+field:
+                ("returnCartonSource".equals(field)?"0":"NULL")+" AS "+field).collect(Collectors.joining(","))
+                +" FROM ("+body+") s";
+        }
+        /** 不同来源用同一组筛选和稳定行标识组合，排序前排除未选来源类型。 */
+        private static String rows() {
+            var planFields=new HashSet<>(Arrays.asList(FIELDS.split(",")));planFields.removeAll(PLAN_MISSING);
+            return "<choose><when test=\"sourceStage != 'RELABEL'\">"+project(DispatchCandidateMapper.AVAILABLE_PLAN_BODY,planFields)
+                +"</when><otherwise>SELECT "+Arrays.stream(FIELDS.split(",")).map(f->"NULL AS "+f).collect(Collectors.joining(","))+" WHERE 1=0</otherwise></choose>"
+                +"<if test='planIds == null or planIds.isEmpty()'>"
+                +"<if test=\"sourceStage == null or sourceStage == 'RECEIVED'\"> UNION ALL "+project(ReturnDispatchCandidateMapper.AVAILABLE_BODY,RETURN_FIELDS)+"</if>"
+                +"<if test=\"sourceStage == null or sourceStage == 'RECEIVED' or sourceStage == 'RELABEL'\"> UNION ALL "
+                +project(DispatchCandidateMapper.RELABEL_BODY,planFields)+" UNION ALL "+project(DispatchCandidateMapper.NATIVE_RELABEL_BODY,NATIVE_FIELDS)+"</if></if>";
+        }
+        /** 仓库页签也是服务端筛选，分页后不能再用本地筛选伪装完整结果。 */
+        private static String filtered() {
+            return " FROM ("+rows()+") candidates WHERE overseasWarehouseId=#{query.warehouseId}"
+                +"<if test='query.destinationWarehouseCode != null'> AND fbaWarehouseCode=#{query.destinationWarehouseCode}</if>"
+                +"<if test=\"query.warehouseTab == 'LAX'\"> AND LOWER(CONCAT(COALESCE(overseasWarehouseCode,''),' ',COALESCE(overseasWarehouseName,''))) REGEXP 'lax|洛杉矶|los angeles'</if>"
+                +"<if test=\"query.warehouseTab == 'NYC'\"> AND LOWER(CONCAT(COALESCE(overseasWarehouseCode,''),' ',COALESCE(overseasWarehouseName,''))) REGEXP 'nyc|jfk|(^|[^a-z])ny([^a-z]|$)|纽约|new[ -]?york'</if>";
+        }
+        /** 同一事务内统计分页全集。 */
+        public static String count(){return "<script>"+BINDINGS+"SELECT COUNT(*)"+filtered()+"</script>";}
+        /** LIMIT发生在任何逐组Java装配之前，最后补来源身份列以保证同名来源不乱序。 */
+        public static String page(){return "<script>"+BINDINGS+"SELECT *"+filtered()
+            +" ORDER BY customerId,orderNo,palletNo,sourceStage,planPalletId,returnReceiptId,orderRefs,returnCartonSource"
+            +" LIMIT #{query.size} OFFSET #{offset}</script>";}
+    }
+}

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/port/DispatchPlanningModels.java

@@ -12,7 +12,8 @@ public final class DispatchPlanningModels {
     private DispatchPlanningModels() { }
 
     public record CandidateQuery(String warehouseId, List<Long> planIds, String orderNo,
-                                   String destinationWarehouseCode, String sourceStage, String draftToken) { }
+                                   String destinationWarehouseCode, String sourceStage, String draftToken,
+                                   int page, int size, String warehouseTab) { }
 
     /** sourceVersion为服务端事实摘要，不能用客户端时间或固定零替代。 */
     public record Candidate(DispatchCommands.CargoSelection selection, String sourceKey, String sourceVersion,
@@ -36,7 +37,9 @@ public final class DispatchPlanningModels {
     public record SelectionGroupPallet(Long warehousePalletId, String palletNo, List<String> sourceKeys,
                                           long packageCount) { }
 
-    public record CandidateList(List<Candidate> candidates, Instant snapshotAt, boolean complete) { }
+    /** complete只在当前响应包含筛选全集时为true；组内complete独立保证跨页完整来源。 */
+    public record CandidateList(List<Candidate> candidates, Instant snapshotAt, boolean complete,
+                                long total, int page, int size, long pages) { }
 
     public record DraftContainer(Long draftContainerId, int sequenceNo, int capacity,
                                    List<String> sourceKeys) { }

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/repository/DispatchSourceRepository.java

@@ -11,6 +11,13 @@ import java.util.List;
 /** 真实货物来源的数据访问封装，不在此层决定阶段或审核。 */
 @Repository
 public class DispatchSourceRepository {
+    @jakarta.annotation.Resource private com.baiyue.lastleg.dispatch.mapper.DispatchCandidatePageMapper pages;
+    /** 筛选全集的数据库行数，与分页使用同一只读事务。 */
+    public long candidateCount(com.baiyue.lastleg.dispatch.port.DispatchPlanningModels.CandidateQuery query){return pages.count(query);}
+    /** 只返回当前页来源，禁止先全量装配再截取。 */
+    public List<DispatchPalletCandidate> candidatePage(com.baiyue.lastleg.dispatch.port.DispatchPlanningModels.CandidateQuery query){
+        return pages.page(query,Math.multiplyExact((long)query.page()-1,query.size()));
+    }
     private final DispatchCandidateMapper plans;
     private final ReturnDispatchCandidateMapper returns;
     private final DispatchSourceMapper source;

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/service/DispatchAggregateService.java

@@ -148,10 +148,12 @@ public class DispatchAggregateService implements DispatchExecutionPort,DispatchA
         requirePlatform(actor);
         if(query==null || query.warehouseId()==null || !query.warehouseId().matches("[1-9][0-9]*")) throw bad("请选择真实海外起运仓");
         if(query.planIds()!=null && (query.planIds().size()>500 || query.planIds().stream().anyMatch(id->id==null || id<=0))) throw bad("计划筛选不合法");
+        if(query.page()<1 || query.size()<1 || query.size()>50 || !Set.of("ALL","LAX","NYC").contains(Objects.toString(query.warehouseTab(),"")))throw bad("候选分页或仓库页签不合法");
         var normalized=new DispatchPlanningModels.CandidateQuery(query.warehouseId(),query.planIds(),trim(query.orderNo()),
-            trim(query.destinationWarehouseCode()),trim(query.sourceStage()),trim(query.draftToken()));
+            trim(query.destinationWarehouseCode()),trim(query.sourceStage()),trim(query.draftToken()),query.page(),query.size(),query.warehouseTab());
         long started=System.nanoTime();
-        var rows=sourceRules.wholeCandidates(actor.operatorId(),normalized);
+        var page=sourceRules.candidatePage(actor.operatorId(),normalized);
+        var rows=page.rows();
         long candidatesRead=System.nanoTime();
         var groups=sourceRules.selectionGroups(rows);
         long groupsRead=System.nanoTime();
@@ -192,7 +194,9 @@ public class DispatchAggregateService implements DispatchExecutionPort,DispatchA
             "dispatch_candidates_slow count={} candidatesMs={} groupsMs={} appointmentsMs={} assembleMs={} totalMs={}",
             rows.size(),(candidatesRead-started)/1_000_000L,(groupsRead-candidatesRead)/1_000_000L,
             (batchesRead-groupsRead)/1_000_000L,(finished-batchesRead)/1_000_000L,(finished-started)/1_000_000L);
-        return new DispatchPlanningModels.CandidateList(List.copyOf(result),Instant.now().truncatedTo(ChronoUnit.MILLIS),true);
+        return new DispatchPlanningModels.CandidateList(List.copyOf(result),Instant.now().truncatedTo(ChronoUnit.MILLIS),
+            normalized.page()==1 && page.total()<=normalized.size(),page.total(),normalized.page(),normalized.size(),
+            (page.total()+normalized.size()-1)/normalized.size());
     }
 
     /** 作业弹框读取真实明细ID和来源，不能从订单展示键或仓托ID推断删除身份。 */

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/service/DispatchPdaQueryService.java

@@ -16,6 +16,8 @@ import static com.baiyue.lastleg.dispatch.port.DispatchTypes.*;
 @Service
 public class DispatchPdaQueryService {
     @jakarta.annotation.Resource private com.baiyue.lastleg.dispatch.repository.DispatchItemSourceRepository sourceOrigins;
+    @jakarta.annotation.Resource private com.baiyue.lastleg.dispatch.repository.DispatchSourceRepository sources;
+    @jakarta.annotation.Resource private DispatchService sourceRules;
     private final DispatchPdaReadRepository repository;private final DispatchAggregateService workflow;
     /** 共用主流程资格，PDA不维护第二套版本和阶段。 */
     public DispatchPdaQueryService(DispatchPdaReadRepository repository,DispatchAggregateService workflow){this.repository=repository;this.workflow=workflow;}
@@ -59,6 +61,8 @@ public class DispatchPdaQueryService {
                 var marks=Arrays.stream(Objects.requireNonNullElse(item.getCartonMarks(),"").split(",")).map(String::trim).filter(s->!s.isEmpty()).collect(Collectors.toSet());
                 var sourcePositions=positions.getOrDefault(item.getCustomerId()+":"+item.getWarehousePalletId(),List.of()).stream()
                     .map(p->new DispatchViews.Position(p.getId(),p.getBalanceId(),n(p.getAvailablePackages()),n(p.getAllocatedPackages()),n(p.getPickedPackages()))).toList();
+                if(item.getWarehousePalletId()==null && item.getPlanPalletId()!=null)
+                    sourcePositions=receivedPlanPositions(actor,item,items);
                 if(normalRelabel(item)) {
                     var contributions=byItem.getOrDefault(item.getId(),List.of());var ownPositions=new ArrayList<DispatchViews.Position>();
                     if(contributions.isEmpty() || contributions.stream().mapToLong(s->n(s.getPackageCount())).sum()!=n(item.getPackageCount()))sourceValid=false;
@@ -89,6 +93,38 @@ public class DispatchPdaQueryService {
         }
         return List.copyOf(result);
     }
+    /** 预排首次扫码前只解析原计划实收仓位，不在GET补写实托；真正绑定仍由pick锁内重验。 */
+    private List<DispatchViews.Position> receivedPlanPositions(Actor actor,DispatchItem item,List<DispatchItem> items) {
+        if(!Objects.equals(actor.boundWarehouseId(),item.getOverseasWarehouseId()))return List.of();
+        var rows=sources.selectedPlan(item.getCustomerId(),item.getPlanPalletId());
+        if(rows.size()!=1)return List.of();
+        var actual=rows.get(0);
+        if(!"RECEIVED".equals(actual.sourceStage()) || actual.warehousePalletId()==null
+            || !Objects.equals(actual.customerId(),item.getCustomerId())
+            || !Objects.equals(actual.overseasWarehouseId(),item.getOverseasWarehouseId())
+            || !Objects.equals(actual.packageCount(),item.getPackageCount())
+            || !Objects.equals(actual.destinationType(),item.getDestinationType())
+            || !Objects.equals(actual.fbaWarehouseCode(),item.getFbaWarehouseCode())
+            || !Objects.equals(actual.deliveryAddress(),item.getDeliveryAddress()))return List.of();
+        var originalOrders=sources.sourceOrders(item.getCustomerId(),null,item.getPlanPalletId());
+        if(originalOrders.isEmpty() || !new HashSet<>(originalOrders).containsAll(
+            sources.sourceOrders(item.getCustomerId(),actual.warehousePalletId(),item.getPlanPalletId())))return List.of();
+        // 同托跨客户、换标及整申请来源必须全部已在原车；不能把新合托货物暴露为原计划可拣库存。
+        var group=sourceRules.selectionGroup(actor.boundWarehouseId(),new DispatchCommands.CargoSelection(
+            SourceType.INBOUND_PLAN,item.getPlanPalletId(),null,null,actual.warehousePalletId(),null));
+        if(!group.complete() || group.sources().isEmpty())return List.of();
+        for(var member:group.sources()) {
+            var selected=items.stream().filter(i->Objects.equals(i.getSourceKey(),member.sourceKey())).findFirst().orElse(null);
+            if(selected==null || !Objects.equals(selected.getCustomerId(),member.customerId())
+                || n(selected.getPackageCount())!=member.packages())return List.of();
+        }
+        var stock=sources.stock(item.getCustomerId(),actual.warehousePalletId(),false);
+        if(stock.stream().anyMatch(p->!Objects.equals(p.warehouseId(),actor.boundWarehouseId())
+            || !Objects.equals(p.palletId(),actual.warehousePalletId()))
+            || stock.stream().mapToLong(p->p.availablePackages()).sum()!=n(item.getPackageCount()))return List.of();
+        return stock.stream().filter(p->p.availablePackages()>0)
+            .map(p->new DispatchViews.Position(p.id(),p.balanceId(),p.availablePackages(),p.allocatedPackages(),p.pickedPackages())).toList();
+    }
     /** 仓和操作者均来自受信身份，不接收请求自报。 */
     private static void require(Actor actor){if(actor==null || actor.mode()!=ActorMode.PDA || actor.operatorId()==null || actor.boundWarehouseId()==null)throw new BizException(ResultCode.FORBIDDEN,"仅绑定仓作业人员可读取PDA作业");}
     /** 缺失计数不作为业务标识使用。 */

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/service/DispatchService.java

@@ -212,32 +212,22 @@ public class DispatchService {
     public record WholeSource(DispatchPalletCandidate candidate,
         com.baiyue.lastleg.dispatch.port.DispatchCommands.CargoSelection selection, String sourceKey, String sourceVersion) { }
 
-    /** 新公开候选一次读取同仓多客户；草稿排除只能使用当前操作者实际拥有的草稿。 */
-    public List<DispatchPalletCandidate> wholeCandidates(String operator,
-        com.baiyue.lastleg.dispatch.port.DispatchPlanningModels.CandidateQuery query) {
+    /** 总数与当前页同事务读取；页外候选不参与逐组装配。 */
+    public record CandidatePage(List<DispatchPalletCandidate> rows,long total) { }
+
+    /** 草稿所有权先验证，数据库分页后才读取测量和原生退货物理身份。 */
+    public CandidatePage candidatePage(String operator,CandidateQuery query) {
         validateSourceStage(query.sourceStage());
         if(query.draftToken()!=null && drafts.findActiveByOperator(operator).stream()
             .noneMatch(d -> query.draftToken().equals(d.getDraftToken())))
             throw new ResponseStatusException(HttpStatus.FORBIDDEN,"不能读取其他操作者的草稿来源");
-        var result=new java.util.ArrayList<DispatchPalletCandidate>();
-        if(!"RELABEL".equals(query.sourceStage())) result.addAll(wholeSources.availablePlans(query));
-        if(query.planIds()==null || query.planIds().isEmpty()) {
-            if(planIdsForReturns(query.sourceStage())) result.addAll(wholeSources.availableReturns(query));
-            if(query.sourceStage()==null || Set.of("RECEIVED","RELABEL").contains(query.sourceStage())) {
-                var rows=wholeSources.availableRelabel(query);
-                if(rows.size()>1000) throw new ResponseStatusException(HttpStatus.BAD_REQUEST,"候选来源超过1000项，请缩小筛选范围");
-                result.addAll(measuredRelabelCandidates(rows));
-                result.addAll(returnRelabelStock.wholeCandidates(query.warehouseId(),query.orderNo()));
-            }
-        }
-        if(result.size()>1000) throw new ResponseStatusException(HttpStatus.BAD_REQUEST,"候选来源超过1000项，请缩小筛选范围");
-        return result.stream().filter(row -> query.destinationWarehouseCode()==null
-            || query.destinationWarehouseCode().equals(row.fbaWarehouseCode()))
-            .sorted(java.util.Comparator.comparing((DispatchPalletCandidate row) -> Objects.toString(row.customerId(),""))
-                .thenComparing(row -> Objects.toString(row.orderNo(),""))
-                .thenComparing(row -> Objects.toString(row.palletNo(),""))).toList();
+        long total=wholeSources.candidateCount(query);
+        var rows=wholeSources.candidatePage(query);
+        measuredRelabelCandidates(rows.stream().filter(row->"RELABEL".equals(row.sourceStage()) && !row.returnCartonSource()).toList());
+        var nativeRows=rows.stream().filter(DispatchPalletCandidate::returnCartonSource).toList();
+        if(!nativeRows.isEmpty())returnRelabelStock.resolvePage(nativeRows);
+        return new CandidatePage(List.copyOf(rows),total);
     }
-
     /** 新主流程按来源真客户解析并先锁全部来源订单，最后锁库存；调用者已持整车父锁。 */
     @Transactional(propagation = org.springframework.transaction.annotation.Propagation.MANDATORY)
     public List<WholeSource> lockWholeSources(String warehouseId,

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/service/ReturnRelabelDispatchStock.java

@@ -27,11 +27,9 @@ public class ReturnRelabelDispatchStock {
         return resolve(candidates.nativeReturnRelabelAvailable(customer,orderNo,relabelNo));
     }
 
-    /** 整车候选只解析已经按仓限定且有界的原生退货记录。 */
-    public List<DispatchPalletCandidate> wholeCandidates(String warehouse,String orderNo) {
-        var rows=candidates.wholeNativeRelabelAvailable(warehouse,null,orderNo,null);
-        if(rows.size()>1000) throw conflict("候选来源超过1000项，请缩小筛选范围");
-        return resolve(rows);
+    /** 分页后仅核实本页原生退货实托；身份失效明确拒绝，不能静默缩页并返回错误总数。 */
+    public void resolvePage(List<DispatchPalletCandidate> rows) {
+        if(resolve(rows).size()!=rows.size())throw conflict("当前页退货托盘的实际仓或状态已变化，请核对后重查");
     }
 
     /** 物理托盘身份必须由原提供者核实，不能用显示托盘码伪造ID。 */

lastleg-service/src/main/java/com/baiyue/lastleg/mapper/DocumentSequenceMapper.java

@@ -0,0 +1,21 @@
+package com.baiyue.lastleg.mapper;
+
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Options;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+/** 本服务业务编号序列，更新与读取必须处于同一事务连接。 */
+@Mapper
+public interface DocumentSequenceMapper {
+    /** 唯一序列键原子递增，并在连接内保存本次分配值。 */
+    @Insert("INSERT INTO ll_document_sequence(sequence_key,current_value) VALUES(#{key},LAST_INSERT_ID(1)) "
+        + "ON DUPLICATE KEY UPDATE current_value=LAST_INSERT_ID(current_value+1)")
+    int allocate(@Param("key") String key);
+
+    /** 禁用一级和二级缓存，返回本事务刚刚分配的值。 */
+    @Select("SELECT LAST_INSERT_ID()")
+    @Options(useCache=false, flushCache=Options.FlushCachePolicy.TRUE)
+    Long allocatedValue();
+}

lastleg-service/src/main/java/com/baiyue/lastleg/repository/DocumentSequenceRepository.java

@@ -0,0 +1,24 @@
+package com.baiyue.lastleg.repository;
+
+import com.baiyue.lastleg.mapper.DocumentSequenceMapper;
+import org.springframework.stereotype.Repository;
+import org.springframework.transaction.annotation.Propagation;
+import org.springframework.transaction.annotation.Transactional;
+
+/** 各业务共用本库序列，独立短事务避免持有编号锁进入业务资源锁。 */
+@Repository
+public class DocumentSequenceRepository {
+    private final DocumentSequenceMapper mapper;
+
+    /** 只访问所属服务的编号表。 */
+    public DocumentSequenceRepository(DocumentSequenceMapper mapper) { this.mapper = mapper; }
+
+    /** 已分配号不因外层业务回滚而复用，允许失败请求产生断号。 */
+    @Transactional(propagation = Propagation.REQUIRES_NEW)
+    public long next(String key) {
+        mapper.allocate(key);
+        Long value = mapper.allocatedValue();
+        if (value == null || value < 1) throw new IllegalStateException("业务编号分配失败");
+        return value;
+    }
+}

lastleg-service/src/main/java/com/baiyue/lastleg/service/LastlegDocumentNumberGenerator.java

@@ -0,0 +1,34 @@
+package com.baiyue.lastleg.service;
+
+import com.baiyue.common.core.number.DailyDocumentNumber;
+import com.baiyue.lastleg.repository.DocumentSequenceRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import java.time.Clock;
+import java.util.Set;
+
+/** 按北京时间生成两至四位前缀、八位日期和四位日流水。 */
+@Component
+public class LastlegDocumentNumberGenerator {
+    private static final Set<String> PREFIXES = Set.of("IP", "CK", "DFCK", "HBCK", "THCK", "DL", "EX", "CD", "TB", "ZY", "TH", "THHB", "RR", "RB", "HX", "YY", "TR", "LB", "CG", "PR", "PJ", "PF", "PN", "PX", "PG", "CT", "FB", "FO", "VR");
+    private final DocumentSequenceRepository sequences;
+    private final Clock clock;
+
+    /** 正式运行使用统一业务时区。 */
+    @Autowired
+    public LastlegDocumentNumberGenerator(DocumentSequenceRepository sequences) {
+        this(sequences, Clock.system(DailyDocumentNumber.BUSINESS_ZONE));
+    }
+
+    /** 固定时钟用于跨日及前缀独立性验证。 */
+    LastlegDocumentNumberGenerator(DocumentSequenceRepository sequences, Clock clock) {
+        this.sequences = sequences;
+        this.clock = clock;
+    }
+
+    /** 只为本服务已登记的业务类型分配号码。 */
+    public String next(String prefix) {
+        if (!PREFIXES.contains(prefix)) throw new IllegalArgumentException("未登记的业务编号前缀：" + prefix);
+        return DailyDocumentNumber.next(prefix, clock, sequences::next);
+    }
+}