List<DataPermissionSchema> dataPermissionSchemaList = new ArrayList<>(); dataPermissionSchemaEoList.forEach(dataPermissionSchemaEo -> { List<SchemaRowRule> schemaRowRules = new ArrayList<>(); List<SchemaColumnRule> schemaColumnRules = new ArrayList<>(); userRowRuleList.stream() .filter(schemaRule -> dataPermissionSchemaEo.getDatabaseCode().equals(schemaRule.getDatabaseCode()) && dataPermissionSchemaEo.getSchemaCode().equals(schemaRule.getSchemaCode())) .forEach(schemaRowRules::add); userColumnRuleList.stream() .filter(schemaRule -> dataPermissionSchemaEo.getDatabaseCode().equals(schemaRule.getDatabaseCode()) && dataPermissionSchemaEo.getSchemaCode().equals(schemaRule.getSchemaCode())) .forEach(schemaColumnRules::add); if(!schemaRowRules.isEmpty() || !schemaColumnRules.isEmpty()) { DataPermissionSchema dataPermissionSchema = new DataPermissionSchema(); dataPermissionSchema.setDatabaseCode(dataPermissionSchemaEo.getDatabaseCode()); dataPermissionSchema.setSchemaCode(dataPermissionSchemaEo.getSchemaCode()); dataPermissionSchema.setSchemaRowRuleList(schemaRowRules); dataPermissionSchema.setSchemaColumnRuleList(schemaColumnRules); dataPermissionSchemaList.add(dataPermissionSchema); }}); UserAgent.setDataPermissionSchema(dataPermissionSchemaList);代码优化代码优化

List<DataPermissionSchema> dataPermissionSchemaList = new ArrayList<>(); for (DataPermissionSchemaEo dataPermissionSchemaEo : dataPermissionSchemaEoList) { List<SchemaRowRule> schemaRowRules = new ArrayList<>(); List<SchemaColumnRule> schemaColumnRules = new ArrayList<>(); DataPermissionSchema dataPermissionSchema = new DataPermissionSchema(); for (SchemaRowRule schemaRowRule : userRowRuleList) { if (schemaRowRule.getSchemaCode().equals(dataPermissionSchemaEo.getSchemaCode()) && dataPermissionSchemaEo.getDatabaseCode().equals(schemaRowRule.getDatabaseCode())) { dataPermissionSchema.setDatabaseCode(dataPermissionSchemaEo.getDatabaseCode()); dataPermissionSchema.setSchemaCode(dataPermissionSchemaEo.getSchemaCode()); schemaRowRules.add(schemaRowRule); } } for (SchemaColumnRule schemaColumnRule : userColumnRuleList) { if (schemaColumnRule.getSchemaCode().equals(dataPermissionSchemaEo.getSchemaCode()) && dataPermissionSchemaEo.getDatabaseCode().equals(schemaColumnRule.getDatabaseCode())) { dataPermissionSchema.setDatabaseCode(dataPermissionSchemaEo.getDatabaseCode()); dataPermissionSchema.setSchemaCode(dataPermissionSchemaEo.getSchemaCode()); schemaColumnRules.add(schemaColumnRule); } } if(dataPermissionSchema.getSchemaCode() == null || dataPermissionSchema.getDatabaseCode() == null){ continue; } dataPermissionSchema.setSchemaRowRuleList(schemaRowRules); dataPermissionSchema.setSchemaColumnRuleList(schemaColumnRules); dataPermissionSchemaList.add(dataPermissionSchema); } //设置UserAgent的数据权限 UserAgent.setDataPermissionSchema(dataPermissionSchemaList);代码优化

List<DataPermissionSchema> dataPermissionSchemaList = new ArrayList<>(); dataPermissionSchemaEoList.forEach(dataPermissionSchemaEo -> { List<SchemaRowRule> schemaRowRules = new ArrayList<>(); List...

优化下面的代码 public Page<FinanceCodeDTO> selectFinanceCodePage(FinanceCodeListVO financeCodeListVO) { //根据类型关联查询数据信息 Page<FinanceCodeDTO> page = new Page<>(financeCodeListVO.getPageNo(),financeCodeListVO.getPageSize()); Page<FinanceCodeDTO> dtoPage = financeCodeMapper.financeCodeList(page, financeCodeListVO); List<FinanceCodeDTO> dtos = dtoPage.getRecords(); List<String> contractIds = dtos.stream().map(FinanceCodePO::getContractIds).collect(Collectors.toList()); List<Integer> idList = new ArrayList<>(); contractIds.forEach(ids -> { if (ToolUtil.isNotEmpty(ids) && !ToolUtil.equals("[]",ids)){ List<Integer> list = JSONObject.parseArray(ids, Integer.class); idList.addAll(list); } }); if (ToolUtil.isNotEmpty(idList)){ CustomerContractPO customerContractPO = new CustomerContractPO(); List<CustomerContractPO> customerContractPOS = customerContractPO.selectList(new QueryWrapper<>(customerContractPO).lambda().in(CustomerContractPO::getCustomerContractId, idList)); Map<Integer, String> map = customerContractPOS.stream().collect(Collectors.toMap(CustomerContractPO::getCustomerContractId, CustomerContractPO::getContractName)); dtos.forEach(dto ->{ if (ToolUtil.isNotEmpty(dto.getContractIds())&& !ToolUtil.equals("[]",dto.getContractIds())){ List<Integer> list = JSONObject.parseArray(dto.getContractIds(), Integer.class); List<String> names = new ArrayList<>(); list.forEach(id ->{ names.add(map.get(id)); }); dto.setContractName(String.join(",",names)); } }); dtoPage.setRecords(dtos); } return dtoPage ; }

List<ContractDTO> contractDTOList = contractMapper.selectContractByIdList(idList); dtos.forEach(dto -> { dto.setContractList(contractDTOList); }); return dtoPage; }答：根据给定的代码，优化的思路是把...

List<Integer> aList = new ArrayList<>(Arrays.asList(1, 2, 3, 3)); List<Integer> bList = new ArrayList<>(Arrays.asList(2, 3)); 在alist中移除blist中的单个元素

List<Integer> aList = new ArrayList<>(Arrays.asList(1, 2, 3, 3)); List<Integer> bList = new ArrayList<>(Arrays.asList(2, 3)); // 在aList中移除bList中的单个元素 bList.forEach(aList::remove); ...

代码优化 List<String> stringList = ExcelUtil.excelToShopIdList1(inputStream); if (CollectionUtils.isEmpty(stringStringMap)) { return warn("无数据"); } List<EquDeviceTslProperty> excelResult = new ArrayList<>(); stringList.forEach(ar->{ EquDeviceTslProperty equDeviceTslProperty = JSON.parseObject(ar, EquDeviceTslProperty.class); excelResult.add(equDeviceTslProperty); }); EquDeviceTslProperty deviceTslProperty = new EquDeviceTslProperty(); deviceTslProperty.setDeviceCode(excelResult.get(0).getDeviceCode()); List<EquDeviceTslProperty> equDeviceTslProperties = equDeviceTslPropertyService.selectEquDeviceTslPropertyList(deviceTslProperty); List<EquDeviceTslProperty> saveList = new ArrayList<>(); Map<String, List<EquDeviceTslProperty>> listMap = equDeviceTslProperties.stream().collect(Collectors.groupingBy(EquDeviceTslProperty::getPropertyId)); excelResult.forEach(ar->{ List<EquDeviceTslProperty> equDeviceTslProperties1 = listMap.get(ar.getPropertyId()); if (CollectionUtils.isEmpty(equDeviceTslProperties1)) { saveList.add(ar); return; } equDeviceTslProperties1.get(0).setValueType(ar.getValueType()) .setSortsIndex(ar.getSortsIndex()) .setPropertyName(ar.getPropertyName()); equDeviceTslPropertyService.updateEquDeviceTslProperty(equDeviceTslProperties1.get(0)); }); equDeviceTslPropertyService.batchInsert(saveList);

List<EquDeviceTslProperty> equDeviceTslProperties1 = listMap.computeIfAbsent(ar.getPropertyId(), k -> new ArrayList<>()); if (equDeviceTslProperties1.isEmpty()) { saveList.add(ar); return null; }...

List<String> nameList = new ArrayList<>(); List<Entity> rsList = new ArrayList<>(); List> valueList = new ArrayList<>(); for (Entity e : rsList) { List<String> singleRecord = new ArrayList<>(); nameList.forEach(n -> singleRecord.add(e.get(n) == null ? "" : e.get(n).toString())); if (e.getMetadata().containsKey(ChargeConst.RATE_RULE_DETAIL)) { Set<Map<String, Object>> ruleDtls = (Set<Map<String, Object>>) e.getMetadata().get(ChargeConst.RATE_RULE_DETAIL); Map<String, Object> mergedMap = ruleDtls.stream().flatMap(map -> map.entrySet().stream()) .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (oldValue, newValue) -> newValue)); singleRecord = IntStream.range(0, singleRecord.size()) .mapToObj(i -> singleRecord.get(i).equals("") && mergedMap.get(nameList.get(i)) != null ? mergedMap.get(nameList.get(i)).toString() : singleRecord.get(i)) .collect(Collectors.toList()); } valueList.add(singleRecord); } if (e.getMetadata().containsKey(ChargeConst.RATE_RULE_DETAIL)) { Set<Map<String, Object>> ruleDtls = (Set<Map<String, Object>>) e.getMetadata().get(ChargeConst.RATE_RULE_DETAIL); Map<String, Object> mergedMap = ruleDtls.stream().flatMap(map -> map.entrySet().stream()) .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (oldValue, newValue) -> newValue)); System.err.println(); } 错误：Local variable singleRecord defined in an enclosing scope must be final or effectively final

final List<String> finalSingleRecord = singleRecord; valueList.add(IntStream.range(0, finalSingleRecord.size()) .mapToObj(i -> finalSingleRecord.get(i).equals("") && mergedMap.get(nameList.get(i)) !=...

使用java8新特性Optinal优化这些代码public BaseusResponse<BatchOperateResultVO> updRetailOrAdjDate(OrderUpdDateBatchCmd updDateBatchCmd) { List<Object> successList = new ArrayList<>(); List<Object> failList = new ArrayList<>(); List<BatchOperateResultVO.BatchOperateResultDetailVO> batchOperateResultDetailVoList = new ArrayList<>(); updDateBatchCmd.getList().forEach(updCmd -> { if (!OrderRetailConstants.CAN_UPD_DATE_ORDER_TYPE_LIST.contains(updCmd.getOrderType())) { throw new OrderBusinessException("订单类型不允许修改"); } }); // 按类型分组 Map<Integer, List<OrderUpdDateCmd>> typeAndCmdListMap = updDateBatchCmd.getList().stream().collect(Collectors.groupingBy(OrderUpdDateCmd::getOrderType)); List<OrderUpdDateCmd> retailCmdList = typeAndCmdListMap.get(OrderCenterTypeEnum.RETAIL_ORDER_TYPE.getOrderType()); List<OrderUpdDateCmd> retailAfterCmdList = typeAndCmdListMap.get(OrderCenterTypeEnum.RETAIL_AFTER_ORDER_TYPE.getOrderType()); List<OrderUpdDateCmd> adjList = typeAndCmdListMap.get(OrderCenterTypeEnum.ADJUSTMENT_ORDER_TYPE.getOrderType()); if (!CollectionUtils.isEmpty(retailCmdList)) { orderRetailUpdateCmdExe.updDate(updDateBatchCmd.getUpdDate(), successList, failList, batchOperateResultDetailVoList, retailCmdList); } if (!CollectionUtils.isEmpty(retailAfterCmdList)) { orderRetailAfterSalesUpdateCmdExe.updDate(updDateBatchCmd.getUpdDate(), successList, failList, batchOperateResultDetailVoList, retailAfterCmdList); } if (!CollectionUtils.isEmpty(adjList)) { orderBusinessAdjustmentUpdateCmdExe.updDate(updDateBatchCmd.getUpdDate(), successList, failList, batchOperateResultDetailVoList, adjList); } return BaseusResponse.success(BatchOperateResultVO.builder().totalCount(successList.size() + failList.size()).successCount(successList.size()).failCount(batchOperateResultDetailVoList.size()).batchOperateResultDetailVO(batchOperateResultDetailVoList).build()); }

List<Object> successList = new ArrayList<>(); List<Object> failList = new ArrayList<>(); List<BatchOperateResultVO.BatchOperateResultDetailVO> batchOperateResultDetailVoList = new ArrayList<>(); ...

List<String> a= new ArrayList<>(mapOld.keySet());

2. new ArrayList<>(mapOld.keySet())使用ArrayList的构造方法将Set转化为ArrayList对象。这里用到了ArrayList的另一个构造方法，即传入一个Collection对象，它会将该Collection中的元素添加到新的ArrayList对象中...

@GetMapping("list") @ResponseBody public List<Attendance> list(HttpSession session) { Integer userid = (Integer) session.getAttribute("userid"); List<Attendance> attendanceList = attendanceService.getAttendanceList(userid, userService.getById(userid).getPositionid()); List<Attendance> listE = new ArrayList<>(); attendanceList.forEach(list -> { listE.add(attendanceService.assignment(list)); }); session.setAttribute("list", listE); // 将 listE 存储到 session 中 return listE; }

这段代码是一个使用Spring框架的Java Web...然后，该方法使用一个foreach循环来将每个Attendance对象分配给一个新的List对象（listE），并将其存储在HttpSession中。最后，该方法返回List对象（listE）作为响应主体。

优化一下List<JSONObject> principalUsers = new ArrayList<>(); StringBuffer sb = new StringBuffer(); String principal = specialWorkSignature.getPrincipal(); List<String> principalUserList = Arrays.asList(principal.split(",")); principalUserList.forEach(c -> { sb.append(0).append(","); }); specialWorkSignature.setPrincipalFile(sb.deleteCharAt(sb.length() - 1).toString()); String recipient = specialWorkSignature.getRecipient(); List<String> recipientUserList = Arrays.asList(recipient.split(",")); StringBuffer sc = new StringBuffer(); recipientUserList.forEach(c -> { sc.append(0).append(","); }); specialWorkSignature.setRecipientFile(sc.deleteCharAt(sc.length() - 1).toString());

List<String> principalUserList = Arrays.asList(specialWorkSignature.getPrincipal().split(",")); String principalFile = String.join(",", Collections.nCopies(principalUserList.size(), "0")); ...

List<String> ids = new ArrayList<>(); List<String> crewIdOld = technicalGroup.getCrewId(); List<String> teamLeaderIdOld = technicalGroup.getTeamLeaderId(); if (crewIdOld != null && crewIdOld.size() > 0) { crewIdOld.stream().forEach(crewIdOldOne -> { if (!crewId.contains(crewIdOldOne)) { ids.add(crewIdOldOne); } }); } if (teamLeaderIdOld != null && teamLeaderIdOld.size() > 0) { teamLeaderIdOld.stream().forEach(teamLeaderIdOldOne -> { if (!teamLeaderId.contains(teamLeaderIdOldOne)) { ids.add(teamLeaderIdOldOne); } }); }解释一下这段代码

3. 如果 crewIdOld 不为空且有元素，那么使用 Stream 的 forEach 方法对其中的每个元素进行遍历，并将其赋值给 crewIdOldOne 变量。 4. 在遍历过程中，使用 if 语句判断当前遍历到的元素是否不在 crewId ...

优化以下代码： //获取所有的类目ids List<Long> goodsCategoryIds = new ArrayList<>(); //获取所有的商品ids List<Long> goodsId = new ArrayList<>(); if (!CollectionUtils.isEmpty(buyReturnActivity.getGoodsIds())) { goodsId.addAll(buyReturnActivity.getGoodsIds()); } if (!CollectionUtils.isEmpty(buyReturnActivity.getGoodsCategoryIds())) { goodsCategoryIds.addAll(buyReturnActivity.getGoodsCategoryIds()); } //获取类目的所有ids Set<Long> goodsCategoryId = new HashSet<>(); if (!CollectionUtils.isEmpty(goodsCategoryIds)) { log.info("获取到的多买多返的类目Ids为============" + goodsCategoryIds); Map<Long, CategoryCache> categoryMap2 = this.categoryService.categoryMap(tenantId, goodsCategoryIds); log.info("获取到的类目缓存mapwei ======= " + categoryMap2); goodsCategoryIds.forEach(c -> { if (Objects.isNull(categoryMap2.get(c))) { return; } else { CategoryCache categoryCache1 = categoryMap2.get(c); String[] split = categoryCache1.getIdPaths().split("-"); List<String> strings = Arrays.asList(split); Set<Long> categoryId = strings.stream().map(Long::parseLong).collect(Collectors.toSet()); goodsCategoryId.addAll(categoryId); } }); }

List<Long> goodsCategoryIds = new ArrayList<>(); List<Long> goodsId = new ArrayList<>(); goodsId.addAll(buyReturnActivity.getGoodsIds()); goodsCategoryIds.addAll(buyReturnActivity.getGoodsCategoryIds...

优化代码 public List<Boolean> machineAuditCallbackBusiness(List<MachineAuditCallbackRequest> request) { log.info("信息请求参数 {}", JSON.toJSON(request)); List<Boolean> result = new ArrayList<>(); request.forEach(temp -> result.add(machineAuditCallbackBusiness(temp)) ); return result; }

public List<Boolean> machineAuditCallbackBusiness(List<MachineAuditCallbackRequest> request) { log.info("信息请求参数 {}", JSON.toJSON(request)); return request.stream().map(this::...

public enum NaturalResourcesEnum { TDDLTB("td_dltb", TdDltb.class), TDGDDB("td_gddb", TdGddb.class), GDZLDJ("gd_zldj", GdZldj.class) ; private String tablename; private Class aClass; NaturalResourcesEnum(String tablename, Class aClass) { this.tablename = tablename; this.aClass = aClass; }Class<T> tableClass = NaturalResourcesEnum.getTableClass(dto.getTablename()); QueryWrapper<?> wrapper = Wrappers.query(); wrapper.likeRight("adcd",dto.getAdcd()); List<Map> map = this.baseMapper.naturalResourcesPageList(dto.getTablename(), wrapper); List<Map> transferMapList = new ArrayList<>(); //将有下划线的转驼峰 map.forEach(x ->{ Map transferMap = MapUtil.formatHumpName(x); transferMapList.add(transferMap); }); List<Map>怎么将枚举对应的实体类把List<Map>转为List<实体类>

List<T> entityList = new ArrayList<>(); for (Map map : mapList) { T entity = entityClass.newInstance(); BeanUtils.populate(entity, map); entityList.add(entity); } return entityList; } // 调用...

优化代码 List<String> deptCodes = new ArrayList<>();

List<String> deptCodes = new ArrayList<>(); // 假设您已经将一些字符串添加到deptCodes中 List<String> optimizedDeptCodes = deptCodes.stream().distinct().collect(Collectors.toList()); 这段代码使用了...

@Test public void t5() { List<DataShowVo> dataShowVos =new ArrayList<>(); Set<Object> keyDataList = redisTemplate.opsForSet().members("keyDateList"); for (Object key : keyDataList) { List<Object> dateList = redisTemplate.opsForList().range(key.toString(), 0, -1); System.out.println(dateList); String date = RedisKeyGenerator.formatDate(key.toString()); DataShowVo list = DataShowVo.builder().data(date).keyName(key.toString()).list(dateList).build(); dataShowVos.add(list); } dataShowVos.forEach(System.out::println); } 为什么第二次的dateList没有数据，在别的方法里可以查到

根据你提供的代码，第二次的 dateList 没有数据的可能原因有以下几个： 1. Redis 数据为空：首先，你需要确保在第二次运行这段代码之前，在 Redis 中的键 key.toString() 对应的列表中确实存在数据。...

public Map<String, Object> kaoYanAllStation() { Map<String, Object> map = new HashMap<>(); //获取上个月月份 String month = DateUtil.month(DateUtil.lastMonth()) + 1 + ""; //获取历年同期降水数据 Double historyPreValue = ComData.historyPre().get(month); //获取历年同期温度数据 Double historyTemValue = ComData.historyTem().get(month); //获取去年同期降水数据 List<JSONObject> lastYearPre = prodBookmarkValueService.tableData(ComData.getLastYearDate(), "SUM_PRE_Time_2020"); //获取上月降水数据 List<JSONObject> lastMonthPre = prodBookmarkValueService.tableData(ComData.getLastMonthDate(), "SUM_PRE_Time_2020"); //获取去年同期温度数据 List<JSONObject> lastYearTem = prodBookmarkValueService.tableData(ComData.getLastYearDate(), "AVG_TEM_Avg"); //获取上月温度数据 List<JSONObject> lastMonthTem = prodBookmarkValueService.tableData(ComData.getLastMonthDate(), "AVG_TEM_Avg"); //定义比较器 Comparator<JSONObject> comparator = Comparator.comparing(o -> o.getStr("Station_Id_C")); lastMonthPre.sort(comparator); lastYearPre.sort(comparator); lastYearTem.sort(comparator); lastMonthTem.sort(comparator); // List<String> stationName = lastMonthPre.stream().map(o -> o.getStr("Station_Name")).collect(Collectors.toList()); //上月降水 { //上月降水 List<Double> sumPre = lastMonthPre.stream().map(o -> o.getDouble("SUM_PRE_Time_2020")).collect(Collectors.toList()); //较历年 List<Double> hisPre = lastMonthPre.stream().map(o -> o.getDouble("SUM_PRE_Time_2020") - historyPreValue).collect(Collectors.toList()); //较去年 List<Double> lastYearSumPre = lastYearPre.stream().map(o -> o.getDouble("SUM_PRE_Time_2020")).collect(Collectors.toList()); List<Double> lastYearPreList = new ArrayList<>(); for (int i = 0; i < sumPre.size(); i++) { lastYearPreList.add(sumPre.get(i) - lastYearSumPre.get(i)); } map.put("sumPre", sumPre); map.put("hisPre", hisPre); map.put("lastYearPreList", lastYearPreList); } { //上月温度 List<Double> tem = lastMonthTem.stream().map(o -> o.getDouble("AVG_TEM_Avg")).collect(Collectors.toList()); //较历年 List<Double> hisTem = lastMonthTem.stream().map(o -> o.getDouble("AVG_TEM_Avg") - historyTemValue).collect(Collectors.toList()); //较去年 List<Double> lastYearSumTem = lastYearTem.stream().map(o -> o.getDouble("AVG_TEM_Avg")).collect(Collectors.toList()); List<Double> lastYearTemList = new ArrayList<>(); for (int i = 0; i < tem.size(); i++) { lastYearTemList.add(tem.get(i) - lastYearSumTem.get(i)); } map.put("tem", tem); map.put("hisTem", hisTem); map.put("lastYearTemList", lastYearTemList); } // map.put("stationName", stationName); return map; } 以上代码如何优化.请用中文回答我

2. 使用 Lambda 表达式和流式处理：在代码中可以看到，有很多地方使用了 foreach 循环来处理集合中的元素，这样会导致代码冗长且不易读。可以使用 Lambda 表达式和流式处理的方式来简化代码，提高可读性和可维护性。...

for (Entity e : rsList) { List<String> singleRecord = new ArrayList<>(); nameList.forEach(n -> singleRecord.add(e.get(n) == null ? "" : e.get(n).toString()));}Local variable singleRecord defined in an enclosing scope must be final or effectively final

List<String> singleRecord = new ArrayList<>(); nameList.forEach(n -> { singleRecord.add(e.get(n) == null ? "" : e.get(n).toString()); }); } 或者将singleRecord声明为final： for (Entity e...

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优化代码 public List<Boolean> machineAuditCallbackBusiness(List<MachineAuditCallbackRequest> request) { log.info("信息 请求参数 {}", JSON.toJSON(request)); List<Boolean> result = new ArrayList<>(); request.forEach(temp -> result.add(machineAuditCallbackBusiness(temp)) ); return result; }

优化代码 List<String> deptCodes = new ArrayList<>();

for (Entity e : rsList) { List<String> singleRecord = new ArrayList<>(); nameList.forEach(n -> singleRecord.add(e.get(n) == null ? "" : e.get(n).toString()));}Local variable singleRecord defined in an enclosing scope must be final or effectively final

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优化代码 public List<Boolean> machineAuditCallbackBusiness(List<MachineAuditCallbackRequest> request) { log.info("信息请求参数 {}", JSON.toJSON(request)); List<Boolean> result = new ArrayList<>(); request.forEach(temp -> result.add(machineAuditCallbackBusiness(temp)) ); return result; }