<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>

spring:
  data:
    mongodb:
      host: 127.0.0.1
      database: articledb
      port: 27017

@SpringBootApplication
public class ArticleApplication {
    public static void main(String[] args) {
        SpringApplication.run(ArticleApplication.class, args);
    }
}

@Data
@Document(collection = "comment")  // 指定為comment集合
@CompoundIndex(def = "{'userid':1}")  // 在userid上建立升序索引
public class Comment implements Serializable {
    @Id
    private String id;//主鍵
    //該屬性對應(yīng)mongodb的字段的名字，如果一致，則無需該注解
    @Field("content")
    private String content;//評論內(nèi)容
    private Date publishtime;//發(fā)布日期
    //添加了一個單字段的索引
    @Indexed
    private String userid;//發(fā)布人ID
    private String nickname;//昵稱
    private LocalDateTime createdatetime;//評論的日期時間
    private Integer likenum;//點贊數(shù)
    private Integer replynum;//回復(fù)數(shù)
    private String state;//狀態(tài)
    private String parentid;//上級ID
    private String articleid;
}

public interface CommentRepository extends MongoRepository<Comment, String> {
}

@Service
public class CommentService {
    @Autowired
    private CommentRepository commentRepository;
    /**
     * 保存評論
     * @param comment
     */
    public void saveComment(Comment comment){
        commentRepository.save(comment);
    }
    /**
     * 更新評論
     * @param comment
     */
    public void updateComment(Comment comment){
        commentRepository.save(comment);
    }
    /**
     * 根據(jù)id刪除評論
     * @param id
     */
    public void deleteCommentById(String id){
        commentRepository.deleteById(id);
    }
    /**
     * 查詢所有評論
     * @return
     */
    public List<Comment> findCommentList(){
        return commentRepository.findAll();
    }
    /**
     * 根據(jù)id查詢評論
     * @param id
     * @return
     */
    public Comment findCommentById(String id){
        return commentRepository.findById(id).get();
    }
    /**
     * 文章評論點贊，點贊數(shù)+1
     * @param id
     */
    public void updateCommentLikenum(String id){
        Query query = new Query(Criteria.where("_id").is(id));
        Update update = new Update();
        update.inc("likenum");
        mongoTemplate.updateFirst(query, update, Comment.class);
    }
}

@SpringBootTest(classes = ArticleApplication.class)
@RunWith(SpringRunner.class)
public class CommentServiceTest {
    @Autowired
    private CommentService commentService;
    @Test
    public void testFindComment(){
        List<Comment> commentList = commentService.findCommentList();
        System.out.println(commentList);
    }
    @Test
    public void testFindCommentById(){
        Comment comment = commentService.findCommentById("1");
        System.out.println(comment);
    }
    @Test
    public void testSaveComment(){
        Comment comment = new Comment();
        comment.setArticleid("100002");
        comment.setContent("樊神yyds");
        comment.setCreatedatetime(LocalDateTime.now());
        comment.setUserid("1003");
        comment.setNickname("隨緣夏沫");
        comment.setState("1");
        comment.setLikenum(0);
        comment.setReplynum(0);
        commentService.saveComment(comment);
    }
    @Test
    public void testFindCommentListByParentid(){
        Page<Comment> page = commentService.findCommentListByParentid("1", 1, 2);
        System.out.println(page.getContent());
    }
    @Test
    public void testUpdateCommentLikenum(){
        commentService.updateCommentLikenum("2");
    }
}