List<Task> list = taskService.createTaskQuery().taskAssignee(userName).list();用这个方法取出来用户当前的任务，怎样处理每次调用这个之后完成一个任务

你可以在取出用户当前任务后，对其中一个任务进行完成操作，然后再次调用该方法获取更新后的任务列表。示例代码如下：

// 获取用户当前任务
List<Task> taskList = taskService.createTaskQuery().taskAssignee(userName).list();

// 完成第一个任务
if (!taskList.isEmpty()) {
    Task task = taskList.get(0);
    taskService.complete(task.getId());
}

// 再次获取用户当前任务
taskList = taskService.createTaskQuery().taskAssignee(userName).list();

需要注意的是，完成任务时需要传入任务的ID，这里示例代码中假设用户当前只有一个任务，所以直接获取第一个任务进行完成。若用户当前有多个任务，则需要根据业务逻辑选择要完成的任务。

相关问题

请用JavaSpirt技术帮我写一份校园快递代取快递的小程序，分别包含用户模块，任务模块，支付模块，消息模块。

好的，让我来为您提供一份基于Java Spring技术的校园快递代取小程序的代码示例：

1. 用户模块：

@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String username;
    private String password;
    private String email;
    private String phone;
    // getters/setters omitted for brevity
}

@Repository
public interface UserRepository extends JpaRepository<User, Long> {
    User findByUsername(String username);
}

@Service
public class UserService {
    @Autowired
    private UserRepository userRepository;

    public User findByUsername(String username) {
        return userRepository.findByUsername(username);
    }
}

2. 任务模块：

@Entity
@Table(name = "tasks")
public class Task {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String title;
    private String description;
    private String pickupAddress;
    private String deliveryAddress;
    private Double fee;
    @ManyToOne(fetch = FetchType.LAZY)
    private User owner;
    private TaskStatus status;
    // getters/setters omitted for brevity
}

public enum TaskStatus {
    OPEN, ASSIGNED, COMPLETED
}

@Repository
public interface TaskRepository extends JpaRepository<Task, Long> {
    List<Task> findByStatus(TaskStatus status);
}

@Service
public class TaskService {
    @Autowired
    private TaskRepository taskRepository;

    public List<Task> findByStatus(TaskStatus status) {
        return taskRepository.findByStatus(status);
    }
}

3. 支付模块：

@Entity
@Table(name = "payments")
public class Payment {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private Double amount;
    private String currency;
    private String description;
    private PaymentStatus status;
    @ManyToOne(fetch = FetchType.LAZY)
    private User user;
    @ManyToOne(fetch = FetchType.LAZY)
    private Task task;
    // getters/setters omitted for brevity
}

public enum PaymentStatus {
    PENDING, COMPLETED, FAILED
}

@Repository
public interface PaymentRepository extends JpaRepository<Payment, Long> {
    List<Payment> findByUser(User user);
}

@Service
public class PaymentService {
    @Autowired
    private PaymentRepository paymentRepository;

    public List<Payment> findByUser(User user) {
        return paymentRepository.findByUser(user);
    }

    public Payment createPayment(Double amount, String currency, String description, User user, Task task) {
        Payment payment = new Payment();
        payment.setAmount(amount);
        payment.setCurrency(currency);
        payment.setDescription(description);
        payment.setUser(user);
        payment.setTask(task);
        payment.setStatus(PaymentStatus.PENDING);
        return paymentRepository.save(payment);
    }

    public Payment completePayment(Long paymentId) {
        Payment payment = paymentRepository.findById(paymentId).orElseThrow(() -> new PaymentNotFoundException(paymentId));
        payment.setStatus(PaymentStatus.COMPLETED);
        return paymentRepository.save(payment);
    }
}

4. 消息模块：

@Entity
@Table(name = "messages")
public class Message {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String text;
    private LocalDateTime sentAt;
    @ManyToOne(fetch = FetchType.LAZY)
    private User sender;
    @ManyToOne(fetch = FetchType.LAZY)
    private User recipient;
    @ManyToOne(fetch = FetchType.LAZY)
    private Task task;
    // getters/setters omitted for brevity
}

@Repository
public interface MessageRepository extends JpaRepository<Message, Long> {
    List<Message> findByTask(Task task);
}

@Service
public class MessageService {
    @Autowired
    private MessageRepository messageRepository;

    public List<Message> findByTask(Task task) {
        return messageRepository.findByTask(task);
    }

    public Message createMessage(String text, User sender, User recipient, Task task) {
        Message message = new Message();
        message.setText(text);
        message.setSentAt(LocalDateTime.now());
        message.setSender(sender);
        message.setRecipient(recipient);
        message.setTask(task);
        return messageRepository.save(message);
    }
}

这是一个简单的示例，您可以根据自己的需求进行修改和扩展。同时，您还需要编写控制器和视图层来实现用户界面和交互。

springboot集成activiti及使用方法

Spring Boot是一种快速开发框架，同时也是一个集成了许多其他框架的框架。Activiti是一个流程引擎，可以用来管理和自动化业务流程。本文将介绍如何在Spring Boot项目中集成Activiti，并使用Activiti来管理业务流程。

1. 添加依赖

在pom.xml文件中添加Activiti的依赖：

<dependency>
    <groupId>org.activiti</groupId>
    <artifactId>activiti-spring-boot-starter-basic</artifactId>
    <version>6.0.0</version>
</dependency>

2. 配置数据源

在application.properties文件中配置数据源：

spring.datasource.url=jdbc:mysql://localhost:3306/activiti?useSSL=false
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

3. 配置Activiti

在application.properties文件中配置Activiti：

# Activiti配置
spring.activiti.database-schema-update=true
spring.activiti.check-process-definitions=true
spring.activiti.history-level=full

4. 编写业务流程

在src/main/resources目录下创建一个名为processes的目录，在该目录下创建一个名为test.bpmn20.xml的文件，编写业务流程。

5. 测试

编写一个简单的测试类：

@RunWith(SpringRunner.class)
@SpringBootTest
public class ActivitiTest {

    @Autowired
    private RuntimeService runtimeService;

    @Test
    public void test() {
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("test");
        assertNotNull(processInstance);
    }
}

运行该测试类，如果没有报错，则Activiti已经集成成功。

6. 使用Activiti

使用Activiti的步骤如下：

1. 部署业务流程

    @Autowired
    private RepositoryService repositoryService;
    
    @Test
    public void deployProcess() {
        Deployment deployment = repositoryService.createDeployment()
                .addClasspathResource("processes/test.bpmn20.xml")
                .deploy();
        assertNotNull(deployment);
    }

2. 启动业务流程

    @Autowired
    private RuntimeService runtimeService;
    
    @Test
    public void startProcess() {
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("test");
        assertNotNull(processInstance);
    }

3. 查询任务

    @Autowired
    private TaskService taskService;
    
    @Test
    public void queryTask() {
        List<Task> tasks = taskService.createTaskQuery().taskAssignee("张三").list();
        assertNotNull(tasks);
    }

4. 完成任务

    @Test
    public void completeTask() {
        Task task = taskService.createTaskQuery().taskAssignee("张三").singleResult();
        taskService.complete(task.getId());
    }

以上就是Spring Boot集成Activiti的基本步骤和使用方法。