Optional<String> optional = Optional.ofNullable(userId);

Optional<String> optional = Optional.ofNullable(userId);这段代码的意思是创建了一个可以包含null值的Optional对象。如果userId不为null，则Optional对象的值为userId；如果userId为null，则Optional对象为空。可以通过调用isPresent()方法来判断Optional对象是否为空。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* *3* [Optional用法](https://blog.csdn.net/Carrots_vegetables/article/details/109289415)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 100%"]
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相关问题

优化代码：@Override public List<ProjectCountVO> projectCount(String beginTime, String endTime, Integer forceType, String projectId) { List<TaskTask> taskTaskList = this.listStatisticsTask(beginTime, endTime, forceType, projectId); if(CollectionUtil.isEmpty(taskTaskList)){ return Collections.emptyList(); } List<ProjectCountVO> result = new ArrayList<>(); Map<String, List<TaskTask>> projectTaskMap = taskTaskList.stream().collect(Collectors.groupingBy(TaskTask::getProjectId)); for (Map.Entry<String, List<TaskTask>> projectTaskEntry : projectTaskMap.entrySet()) { String currentProjectId = projectTaskEntry.getKey(); ProjectCountVO projectCountVO = new ProjectCountVO(); projectCountVO.setId(currentProjectId); // 查询项目名称 ProjectCondition queryProjectDto = new ProjectCondition(); queryProjectDto.setCompanyId(companyId); queryProjectDto.setDesignStatusList(designStatusList); queryProjectDto.setPageSize(pageSize); queryProjectDto.setUserId(userId); ResultWrapper<QueryAllProject> queryAllProjectResult = applicationServicePlatformClient.listUserProject(bspToken, bspUserId, bspUserEnvId, bspUserTenant, queryProjectDto); QueryAllProject queryAllProject = queryAllProjectResult.getData(); projectCountVO.setName(queryAllProject.getProjectName()); List<TaskTask> taskList = projectTaskEntry.getValue(); projectCountVO.setTaskCount(taskList.size()); Integer problemCount = CollectionUtil.isEmpty(taskList) ? 0 : taskList.stream().collect(Collectors.summingInt(task-> Optional.ofNullable(task.getProblemNum()).orElse(0))); projectCountVO.setProblemCount(problemCount); result.add(projectCountVO); } return result; }

可以考虑对代码进行以下优化：

1. 将查询项目名称的逻辑提取成一个方法，避免在循环中重复查询。

2. 使用lambda表达式简化代码，如使用`stream().mapToInt().sum()`代替`stream().collect(Collectors.summingInt())`。

3. 对于空集合的判断，可以使用`Optional.ofNullable().orElse()`代替`CollectionUtil.isEmpty()`。

优化后的代码如下：

@Override
public List<ProjectCountVO> projectCount(String beginTime, String endTime, Integer forceType, String projectId) {
    List<TaskTask> taskTaskList = this.listStatisticsTask(beginTime, endTime, forceType, projectId);
    if (CollectionUtil.isEmpty(taskTaskList)) {
        return Collections.emptyList();
    }

    List<ProjectCountVO> result = new ArrayList<>();
    Map<String, List<TaskTask>> projectTaskMap = taskTaskList.stream()
            .collect(Collectors.groupingBy(TaskTask::getProjectId));

    for (Map.Entry<String, List<TaskTask>> projectTaskEntry : projectTaskMap.entrySet()) {
        String currentProjectId = projectTaskEntry.getKey();
        ProjectCountVO projectCountVO = new ProjectCountVO();
        projectCountVO.setId(currentProjectId);
        projectCountVO.setName(queryProjectName(currentProjectId)); // 查询项目名称
        List<TaskTask> taskList = projectTaskEntry.getValue();
        projectCountVO.setTaskCount(taskList.size());
        Integer problemCount = taskList.stream()
                .mapToInt(task -> Optional.ofNullable(task.getProblemNum()).orElse(0))
                .sum();
        projectCountVO.setProblemCount(problemCount);
        result.add(projectCountVO);
    }

    return result;
}

/**
 * 查询项目名称
 */
private String queryProjectName(String projectId) {
    ProjectCondition queryProjectDto = new ProjectCondition();
    queryProjectDto.setCompanyId(companyId);
    queryProjectDto.setDesignStatusList(designStatusList);
    queryProjectDto.setPageSize(pageSize);
    queryProjectDto.setUserId(userId);
    ResultWrapper<QueryAllProject> queryAllProjectResult = applicationServicePlatformClient.listUserProject(bspToken, bspUserId, bspUserEnvId, bspUserTenant, queryProjectDto);
    QueryAllProject queryAllProject = queryAllProjectResult.getData();
    return queryAllProject.getProjectName();
}

根据接口“”@FeignClient(name = "UserUgsApi", url = "${newbim.login-domain}") public interface IApplicationServicePlatformClient {@PostMapping("/ums/v1/feign/omp/project/search") ResultWrapper<QueryAllProject> listUserProject(@RequestHeader("BSP_TOKEN") String bspToken, @RequestHeader("BSP_USER_ID") String bspUserId, @RequestHeader("BSP_USER_ENV_ID") String bspUserEnvId, @RequestHeader("BSP_USER_TENANT") String bspUserTenant, @RequestBody ProjectCondition queryProjectDto);和代码“@Component @Slf4j public class ApplicationServicePlatformClientProxy { @Autowired private IApplicationServicePlatformClient applicationServicePlatformClient; public QueryAllProject listUserProject(String appId, String companyId, String designStatusList, String pageSize, ProjectCondition userId) { ResultWrapper<QueryAllProject> result = null; return result.getData(); } }”，修改下面内容：public List<ProjectCountVO> projectCount(String beginTime, String endTime, Integer forceType, String projectId) { List<TaskTask> taskTaskList = this.listStatisticsTask(beginTime, endTime, forceType, projectId); if (CollectionUtil.isEmpty(taskTaskList)) { return Collections.emptyList(); } List<ProjectCountVO> result = new ArrayList<>(); Map<String, List<TaskTask>> projectTaskMap = taskTaskList.stream().collect(Collectors.groupingBy(TaskTask::getProjectId)); for (Map.Entry<String, List<TaskTask>> projectTaskEntry : projectTaskMap.entrySet()) { projectId = projectTaskEntry.getKey(); ProjectCountVO projectCountVO = new ProjectCountVO(); projectCountVO.setId(projectId); //查询项目名称 ResultWrapper<QueryAllProject> projectResult = applicationServicePlatformClient.listUserProject( "token", "userId", "userEnvId", "userTenant", new ProjectCondition()); QueryAllProject queryAllProject = projectResult.getData(); String projectName = queryAllProject.getBtpProjectId(); projectCountVO.setName(projectName); List<TaskTask> taskList = projectTaskEntry.getValue(); projectCountVO.setTaskCount(taskList.size()); Integer problemCount = CollectionUtil.isEmpty(taskList) ? 0 : taskList.stream().collect(Collectors.summingInt(task -> Optional.ofNullable(task.getProblemNum()).orElse(0))); projectCountVO.setProblemCount(problemCount); result.add(projectCountVO); } return result; }

在代码中，我们需要调用IApplicationServicePlatformClient接口中的listUserProject方法来获取项目名称。在调用该方法时，需要传入五个参数：bspToken、bspUserId、bspUserEnvId、bspUserTenant和queryProjectDto。这些参数的值需要根据实际情况来确定。其中，queryProjectDto是一个ProjectCondition类型的对象，需要根据实际情况来构造。

修改后的代码如下：

@Component
@Slf4j
public class ApplicationServicePlatformClientProxy {

    @Autowired
    private IApplicationServicePlatformClient applicationServicePlatformClient;

    public List<ProjectCountVO> projectCount(String beginTime, String endTime, Integer forceType, String projectId) {
        List<TaskTask> taskTaskList = this.listStatisticsTask(beginTime, endTime, forceType, projectId);

        if (CollectionUtil.isEmpty(taskTaskList)) {
            return Collections.emptyList();
        }

        List<ProjectCountVO> result = new ArrayList<>();

        Map<String, List<TaskTask>> projectTaskMap = taskTaskList.stream()
                .collect(Collectors.groupingBy(TaskTask::getProjectId));

        for (Map.Entry<String, List<TaskTask>> projectTaskEntry : projectTaskMap.entrySet()) {
            projectId = projectTaskEntry.getKey();
            ProjectCountVO projectCountVO = new ProjectCountVO();
            projectCountVO.setId(projectId);

            // 查询项目名称
            ResultWrapper<QueryAllProject> projectResult = applicationServicePlatformClient.listUserProject(
                    "token", "userId", "userEnvId", "userTenant",
                    new ProjectCondition()
            );
            QueryAllProject queryAllProject = projectResult.getData();
            String projectName = queryAllProject.getBtpProjectId();
            projectCountVO.setName(projectName);

            List<TaskTask> taskList = projectTaskEntry.getValue();
            projectCountVO.setTaskCount(taskList.size());

            Integer problemCount = CollectionUtil.isEmpty(taskList) ? 0 : taskList.stream()
                    .collect(Collectors.summingInt(task -> Optional.ofNullable(task.getProblemNum()).orElse(0)));
            projectCountVO.setProblemCount(problemCount);

            result.add(projectCountVO);
        }

        return result;
    }
}