可以直接访问的ChatGPT来了

1、国产ChatGPT来了

上链接

2、来个例子

Java List<EvaluationItemRecordDTO> 按照evaluationItemId分组 按照score求平均值最后求和

import java.util.*;import java.util.stream.Collectors;public class Main {    public static void main(String[] args) {        // 假设有以下评估记录        List<EvaluationItemRecordDTO> records = new ArrayList<>();        records.add(new EvaluationItemRecordDTO(1, 80));        records.add(new EvaluationItemRecordDTO(2, 90));        records.add(new EvaluationItemRecordDTO(1, 70));        records.add(new EvaluationItemRecordDTO(1, 85));        records.add(new EvaluationItemRecordDTO(2, 95));        // 按照evaluationItemId分组，按照score求平均值        Map<Integer, Double> avgScoreByItemId = records.stream()                .collect(Collectors.groupingBy(                        EvaluationItemRecordDTO::getEvaluationItemId,                        Collectors.averagingDouble(EvaluationItemRecordDTO::getScore)));        // 输出每个评估项的平均分数        System.out.println("每个评估项的平均分数：");        for (Map.Entry<Integer, Double> entry : avgScoreByItemId.entrySet()) {            System.out.println("评估项" + entry.getKey() + "的平均分数为：" + entry.getValue());        }        // 求所有评估项平均分数的总和        double sumOfAvgScores = avgScoreByItemId.values().stream()                .mapToDouble(Double::doubleValue)                .sum();        System.out.println("所有评估项平均分数的总和为：" + sumOfAvgScores);    }}class EvaluationItemRecordDTO {    private int evaluationItemId;    private int score;    public EvaluationItemRecordDTO(int evaluationItemId, int score) {        this.evaluationItemId = evaluationItemId;        this.score = score;    }    public int getEvaluationItemId() {        return evaluationItemId;    }    public void setEvaluationItemId(int evaluationItemId) {        this.evaluationItemId = evaluationItemId;    }    public int getScore() {        return score;    }    public void setScore(int score) {        this.score = score;    }}