对时间复杂度进行了尝试，发现并没有任何懒用
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huanghui
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package org.jeecg.modules.demo.superlilu.service.impl;
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import com.alibaba.fastjson.JSONArray;
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import com.alibaba.fastjson.JSONObject;
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import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
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import org.jeecg.common.api.vo.Result;
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import org.jeecg.modules.demo.superlilu.entity.CetEnglish;
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import org.jeecg.modules.demo.superlilu.mapper.CetEnglishMapper;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import org.jeecg.modules.demo.superlilu.service.ICetEnglishService;
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import org.springframework.stereotype.Service;
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import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
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import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
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import org.jeecg.modules.demo.superlilu.entity.CetEnglish;
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import org.jeecg.modules.demo.superlilu.mapper.CetEnglishMapper;
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import org.jeecg.common.api.vo.Result;
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import com.alibaba.fastjson.JSONObject;
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import org.springframework.beans.factory.annotation.Autowired;
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import java.util.List;
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import java.util.Map;
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import java.util.stream.Collectors;
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/**
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* @Description: 四六级英语
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* @Author: jeecg-boot
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* @Date: 2023-10-27
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* @Version: V1.0
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*/
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@Service
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public class CetEnglishServiceImpl extends ServiceImpl<CetEnglishMapper, CetEnglish> implements ICetEnglishService {
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/**
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* {
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* "college": "xxx",//全部则留空
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* "batch": "2021-06-01",//全部则留空
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* "level": "英语四级",//全部则留空
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* "cultivationlevel": "本科",//全部则留空
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* "examgrade": "大一"//全部则留空
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* }
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*
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* @param webData webData
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* @return Result<?>
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*/
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@Autowired
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private CetEnglishMapper cetEnglishMapper;
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@Override
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public Result<JSONObject> searchCetData(JSONObject webData) {
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QueryWrapper<CetEnglish> queryWrapper = new QueryWrapper<>();
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// 定义要匹配的字段
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String[] fields = {"college", "batch", "level", "cultivationlevel", "examgrade"};
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for (String field : fields) {
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if (webData.containsKey(field)) {
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Object fieldValue = webData.get(field);
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if (fieldValue instanceof List) {
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if (((List<?>) fieldValue).isEmpty()) {
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continue;
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}
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// 如果值是列表，则使用in条件
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queryWrapper.in(field, (List<?>) fieldValue);
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} else {
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if (fieldValue == null || "".equals(fieldValue)) {
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continue;
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}
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queryWrapper.in(field, fieldValue);
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}
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}
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// 构建查询条件
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if (webData.containsKey("college") && webData.getJSONArray("college").size() > 0) {
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queryWrapper.in("college", webData.getJSONArray("college"));
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}
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// 如果queryWrapper为空,则查询全部
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List<CetEnglish> list = list(queryWrapper);
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//基于学院college分组
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Map<String, List<CetEnglish>> collegeMap = list.stream().collect(Collectors.groupingBy(CetEnglish::getCollege));
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// 基于学院college分组后的map再基于批次batch分组
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Map<String, Map<String, List<CetEnglish>>> collegeBatchMap = collegeMap.entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, entry -> entry.getValue().stream().collect(Collectors.groupingBy(CetEnglish::getBatch))));
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//转为JSON,并计算每个学院的每个批次的报名人数和(isPassed=1)通过人数及通过率,存入JSONObject
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if (webData.containsKey("batch") && webData.getJSONArray("batch").size() > 0) {
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queryWrapper.in("batch", webData.getJSONArray("batch"));
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}
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if (webData.containsKey("level") && !webData.getString("level").isEmpty()) {
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queryWrapper.eq("level", webData.getString("level"));
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}
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if (webData.containsKey("cultivationlevel") && !webData.getString("cultivationlevel").isEmpty()) {
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queryWrapper.eq("cultivationlevel", webData.getString("cultivationlevel"));
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}
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if (webData.containsKey("examgrade") && !webData.getString("examgrade").isEmpty()) {
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queryWrapper.eq("examgrade", webData.getString("examgrade"));
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}
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// 查询满足条件的数据
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List<CetEnglish> cetDataList = cetEnglishMapper.selectList(queryWrapper);
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// 根据学院和考试日期进行分组统计报名人数、通过人数和通过率
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Map<String, Map<String, List<CetEnglish>>> groupedData = cetDataList.stream()
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.collect(Collectors.groupingBy(CetEnglish::getCollege,
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Collectors.groupingBy(CetEnglish::getBatch)));
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// 构建结果数据
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JSONObject data = new JSONObject();
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for (Map.Entry<String, Map<String, List<CetEnglish>>> collegeBatchEntry : collegeBatchMap.entrySet()) {
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JSONObject collegeBatchData = new JSONObject();
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for (Map.Entry<String, List<CetEnglish>> batchEntry : collegeBatchEntry.getValue().entrySet()) {
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JSONObject batchData = new JSONObject();
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double total = batchEntry.getValue().size();
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double passed = 0;
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for (CetEnglish cetEnglish : batchEntry.getValue()) {
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if (cetEnglish.getIspassed() == 1) {
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passed++;
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}
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}
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batchData.put("total", total);
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batchData.put("passed", passed);
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batchData.put("passRate", Math.round(passed / total * 10000) / 100.0 + "%");
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collegeBatchData.put(batchEntry.getKey(), batchData);
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JSONArray resultList = new JSONArray();
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int totalEntries = 0;
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int totalPass = 0;
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for (Map.Entry<String, Map<String, List<CetEnglish>>> collegeEntry : groupedData.entrySet()) {
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String college = collegeEntry.getKey();
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Map<String, List<CetEnglish>> gradeData = collegeEntry.getValue();
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for (Map.Entry<String, List<CetEnglish>> gradeEntry : gradeData.entrySet()) {
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String batch = gradeEntry.getKey();
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List<CetEnglish> gradeCetData = gradeEntry.getValue();
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int entries = gradeCetData.size();
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int passCount = (int) gradeCetData.stream().filter(cet -> cet.getIspassed() == 1).count();
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double passRate = (entries > 0) ? ((double) passCount / entries) * 100 : 0;
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// 构建单条结果数据
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JSONObject resultEntry = new JSONObject();
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resultEntry.put("college", college);
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resultEntry.put("batch", batch);
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resultEntry.put("entries", entries);
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resultEntry.put("passCount", passCount);
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resultEntry.put("passRate", passRate);
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resultList.add(resultEntry);
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// 更新总报名人数和总通过人数
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totalEntries += entries;
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totalPass += passCount;
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}
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data.put(collegeBatchEntry.getKey(), collegeBatchData);
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}
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//返回结果
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// 计算总通过率
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double passRate = (totalEntries > 0) ? ((double) totalPass / totalEntries) * 100 : 0;
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// 构建返回结果
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data.put("resultList", resultList);
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data.put("totalEntries", totalEntries);
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data.put("totalPass", totalPass);
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data.put("passRate", passRate);
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// 返回结果
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return Result.OK(data);
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}
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}
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