SpringBoot JPA 分组查询并根据查询数量排序

工作时遇到一个问题就是想用JPA分组查询并展示出数量，并按数量排序，终于参考无数资料搞了出来

    @Autowired
    private EntityManager entityManager;

    private List userMessageVos (){
        CriteriaBuilder cb = entityManager.getCriteriaBuilder();
        CriteriaQuery cq = cb.createTupleQuery();
        Root root = cq.from(CallRecordEntity.class);
        List orderList = new ArrayList<>();
        orderList.add(cb.desc(cb.count(root)));//按照查询出来的数量进行排序
        Path userName = root.get("userName");//返回值中的用户名
        cq.select(cb.tuple(userName,cb.count(root)));
        cq.groupBy(userName);//通过姓名分组
        cq.orderBy(orderList);//排序
        TypedQuery q = entityManager.createQuery(cq);
        List result = q.getResultList();//查询
        return result;
    }

    @Override
    public List userMessageVo(String month) {

        List userMessageVoList = new ArrayList<>();
        List list = userMessageVos();
        //因为数据比较多，在这里只展示十个
        for (int i = 0;i<10;i++){
            Tuple tuple = list.get(i);
            UserMessageVo userMessageVo = new UserMessageVo();
            userMessageVo.setUserName((String)tuple.get(0));
            userMessageVo.setIcount((Long) tuple.get(1));
            userMessageVoList.add(userMessageVo);
        }
        return userMessageVoList;

    }

其中UserMessageVo 是返回值，CallRecordEntity是实体类

package com.wf.demo.entity.vo;

import io.swagger.annotations.ApiModelProperty;
import lombok.Getter;
import lombok.Setter;

/**
 * @Author WF
 * @DesCription 员工通话量记录返回值
 * @Date 2019/3/8 17:18
 **/
@Getter
@Setter
public class UserMessageVo {
    @ApiModelProperty("员工姓名")
    private String userName;

    @ApiModelProperty("数量")
    private Long icount;

    public UserMessageVo(){}
    public UserMessageVo(String userName,Long icount){
        this.userName = userName;
        this.icount = icount;
    }
}

package com.wf.demo.entity;

import com.fasterxml.jackson.annotation.JsonFormat;
import io.swagger.annotations.ApiModelProperty;
import lombok.Getter;
import lombok.Setter;
import org.springframework.format.annotation.DateTimeFormat;

import javax.persistence.*;
import java.io.File;
import java.util.Date;

/**
 * @Author WF
 * @DesCription 通话记录实体类
 * @Date 2019/3/8 17:08
 **/
@Getter
@Setter
@Entity
@Table(name = "business_info_call_record")
public class CallRecordEntity {

    @ApiModelProperty("呼叫id")
    @Id
    private String callId;

    @ApiModelProperty("主叫号码")
    private String caller;

    @ApiModelProperty("被叫号码")
    private String called;

    @ApiModelProperty("振铃时长")
    .....................
    .....................
    .....................

swagger中的返回值