面向切面编程

1
2<dependency>
3   <groupId>org.springframework.boot</groupId>
4   <artifactId>spring-boot-starter-aop</artifactId>
5</dependency>

Movie 类

1@Repository
2public class Movie {
3    public String getMovieDetails() {
4        // 与 Movie 数据库交互
5        return "电影详情";
6    }
7}

User 类

1@Repository
2public class User {
3    public String getUserDetails() {
4        // 与 User 数据库交互
5        return "用户详情";
6    }
7}

FilteringTechnique1 类

1@Service
2public class FilteringTechnique1 {
3    @Autowired
4    private Movie movie;
5
6    public String contentBasedFiltering() {
7        String movieDetails = movie.getMovieDetails();
8        return movieDetails;
9    }
10}

FilteringTechnique2 类

1@Service
2public class FilteringTechnique2 {
3    @Autowired
4    private User user;
5
6    public String collaborativeFiltering() {
7        String userDetails = user.getUserDetails();
8        return userDetails;
9    }
10}

代码示例

1@SpringBootApplication
2public class MovieRecommenderAopApplication implements CommandLineRunner {
3
4    private Logger logger = LoggerFactory.getLogger(this.getClass());
5
6    @Autowired
7    private FilteringTechnique1 filter1;
8
9    @Autowired
10    private FilteringTechnique2 filter2;
11
12    public static void main(String[] args) {
13        SpringApplication.run(MovieRecommenderAopApplication.class, args);
14    }
15
16    @Override
17    public void run(String... args) throws Exception {
18        logger.info("{}", filter1.contentBasedFiltering());
19        logger.info("{}", filter2.collaborativeFiltering());
20    }
21}