互相喜欢，喜欢，粉丝 – 统计

思路分析

代码实现，首先构造vo返回对象，里面封装的是统计的数据数量

package com.tanhua.model.vo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class CountsVo implements Serializable {

           private  Long eachLoveCount;//(互相喜欢数);
           private  Long loveCount;//(喜欢),
           private  Long fanCount;//(粉丝),
}

Controller

    /**
     * 互相喜欢，喜欢，粉丝 - 统计
     * 请求路径：/users/counts
     * 请求方式：get
     * 响应数据：    Integer eachLoveCount(互相喜欢数);
     *             Integer loveCount(喜欢),
     *             Integer fanCount(粉丝),
     */

    @GetMapping("/counts")
    public ResponseEntity getNumber(){

       CountsVo countsVo =  service.getNumber();
       return ResponseEntity.ok(countsVo);
    }

Service

 /**
     *
     *互相喜欢，喜欢，粉丝 - 统计
     */
    public CountsVo getNumber() {
        //1.先获取当前用户id
        Long userId = ThreadLocalUtils.getUserId();
        //1. 根据当前用户id查询好友表 互相喜欢数量
        Long eachLoveCount = friendApi.findEachLoveCount(userId);
        //2  根据当前用户id查询喜欢表 喜欢数量
        Long loveCount = userLikeApi.findLoveCount(userId);
        //3 根据当前用户id查询喜欢表 粉丝数量
        Long fanCount = userLikeApi.findFanCount(userId);
        return new CountsVo(eachLoveCount,loveCount,fanCount);
    }

FriendApiImpl

好友数量就是互相喜欢数量

  /**
     *
     *查询好友数量
     */
    public Long findEachLoveCount(Long userId) {
        //构造查询条件
        Criteria criteria = Criteria.where("userId").is(userId);
        Query query = Query.query(criteria);
        //2.
        long count = mongoTemplate.count(query, Friend.class);


        return count;
    }

UserLikeApiImpl

/**
     *查询喜欢的数量
     */
    public Long findLoveCount(Long userId) {

        Boolean b = true;
        Criteria criteria = Criteria.where("userId").is(userId).and("isLike").is(b);
        Query query = Query.query(criteria);


        long count = mongoTemplate.count(query, UserLike.class);
        return count;
    }


    /**
     * 查询粉丝数量
     *
     */
    public Long findFanCount(Long userId) {
        Criteria criteria = Criteria.where("likeUserId").is(userId).and("idLike").is(true);
        Query query = Query.query(criteria);
        long count = mongoTemplate.count(query, UserLike.class);
        return count;
    }

原文地址：http://www.cnblogs.com/zhangdashuaige/p/16851775.html