如何在Spring中注入Java集合类型？请给出配置示例。

@Component
public class UserService {

    private final List<UserRepository> userRepositories;

    @Autowired
    public UserService(List<UserRepository> userRepositories) {
        this.userRepositories = userRepositories;
    }

    public void someMethod() {
        // 遍历集合中的所有UserRepository
        for (UserRepository repository : userRepositories) {
            repository.save(new User());
        }
    }
}

@Component
public class MysqlUserRepository implements UserRepository {
    // 实现细节
}

@Component
public class MongoUserRepository implements UserRepository {
    // 实现细节
}

@Component
public class UserService {

    private final Set<UserRepository> userRepositories;

    @Autowired
    public UserService(Set<UserRepository> userRepositories) {
        this.userRepositories = userRepositories;
    }

    public void someMethod() {
        // 遍历集合中的所有UserRepository
        for (UserRepository repository : userRepositories) {
            repository.save(new User());
        }
    }
}

@Component
public class MysqlUserRepository implements UserRepository {
    // 实现细节
}

@Component
public class MongoUserRepository implements UserRepository {
    // 实现细节
}

@Component
public class UserService {

    private final Map<String, UserRepository> userRepositoryMap;

    @Autowired
    public UserService(Map<String, UserRepository> userRepositoryMap) {
        this.userRepositoryMap = userRepositoryMap;
    }

    public void someMethod() {
        // 通过Map获取不同的UserRepository
        userRepositoryMap.forEach((key, value) -> {
            System.out.println("Repository key: " + key);
            value.save(new User());
        });
    }
}

@Component("mysqlRepository")
public class MysqlUserRepository implements UserRepository {
    // 实现细节
}

@Component("mongoRepository")
public class MongoUserRepository implements UserRepository {
    // 实现细节
}

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="mysqlUserRepository" class="com.example.MysqlUserRepository" />
    <bean id="mongoUserRepository" class="com.example.MongoUserRepository" />

    <!-- 注入List -->
    <bean id="userService" class="com.example.UserService">
        <constructor-arg>
            <list>
                <ref bean="mysqlUserRepository" />
                <ref bean="mongoUserRepository" />
            </list>
        </constructor-arg>
    </bean>
</beans>