package com.tingyi.pojo;

import lombok.*;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class ColthTypeVo {
    //所指定的字段
    private String name;
    //統(tǒng)計(jì)的數(shù)量
    private Integer total;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getTotal() {
        return total;
    }

    public void setTotal(Integer total) {
        this.total = total;
    }
}

JSONObject jsonObject = JSON.parseObject(sync);
        JSONObject data = jsonObject.getJSONObject("data");
        List<ColthType> records = data.getList("records", ColthType.class);

List<ColthTypeVo> collect = records.stream()
                //這邊建議將這個(gè)字段過(guò)濾一下  不能為空
                .filter(l->!StringUtils.isEmpty(l.getCarTypeName()))
                //如果為空的話  這里分組會(huì)報(bào)錯(cuò) key is null
                .collect(Collectors.groupingBy(ColthType::getCarTypeName))
                .entrySet()
                .stream()
                .map(c -> {
                    String key = c.getKey();
                    List<ColthType> value = c.getValue();
                    Integer size = value.size();
                    ColthTypeVo colthTypeVo = new ColthTypeVo();
                    colthTypeVo.setName(key);
                    colthTypeVo.setTotal(size);
                    return colthTypeVo;
                    //小伙伴要注意  這里不可以直接 new ColthTypeVo().setName(key);  可能會(huì)因?yàn)榉祷刂禐関oid爆紅  void不支持鏈?zhǔn)秸{(diào)用
                    
                }).collect(Collectors.toList());