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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 2023-10-28 17:07:15 +08:00
parent 2c242f4408
commit 37d0f4b33f
1 changed files with 76 additions and 68 deletions
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144
jeecg-module-system/jeecg-system-start/src/main/java/org/jeecg/modules/demo/superlilu/service/impl/CetEnglishServiceImpl.java
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@ -1,92 +1,100 @@
package org.jeecg.modules.demo.superlilu.service.impl; package org.jeecg.modules.demo.superlilu.service.impl;
import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import org.jeecg.common.api.vo.Result;
import org.jeecg.modules.demo.superlilu.entity.CetEnglish;
import org.jeecg.modules.demo.superlilu.mapper.CetEnglishMapper;
import org.jeecg.modules.demo.superlilu.service.ICetEnglishService; import org.jeecg.modules.demo.superlilu.service.ICetEnglishService;
import org.springframework.stereotype.Service; import org.springframework.stereotype.Service;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import org.jeecg.modules.demo.superlilu.entity.CetEnglish;
import org.jeecg.modules.demo.superlilu.mapper.CetEnglishMapper;
import org.jeecg.common.api.vo.Result;
import com.alibaba.fastjson.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import java.util.List; import java.util.List;
import java.util.Map; import java.util.Map;
import java.util.stream.Collectors; import java.util.stream.Collectors;
/**
* @Description: 四六级英语
* @Author: jeecg-boot
* @Date: 2023-10-27
* @Version: V1.0
*/
@Service @Service
public class CetEnglishServiceImpl extends ServiceImpl<CetEnglishMapper, CetEnglish> implements ICetEnglishService { public class CetEnglishServiceImpl extends ServiceImpl<CetEnglishMapper, CetEnglish> implements ICetEnglishService {
/** @Autowired
* { private CetEnglishMapper cetEnglishMapper;
* "college": "xxx",//全部则留空
* "batch": "2021-06-01",//全部则留空
* "level": "英语四级",//全部则留空
* "cultivationlevel": "本科",//全部则留空
* "examgrade": "大一"//全部则留空
* }
*
* @param webData webData
* @return Result<?>
*/
@Override
public Result<JSONObject> searchCetData(JSONObject webData) { public Result<JSONObject> searchCetData(JSONObject webData) {
QueryWrapper<CetEnglish> queryWrapper = new QueryWrapper<>(); QueryWrapper<CetEnglish> queryWrapper = new QueryWrapper<>();
// 定义要匹配的字段
String[] fields = {"college", "batch", "level", "cultivationlevel", "examgrade"};
for (String field : fields) {
if (webData.containsKey(field)) { // 构建查询条件
Object fieldValue = webData.get(field); if (webData.containsKey("college") && webData.getJSONArray("college").size() > 0) {
if (fieldValue instanceof List) { queryWrapper.in("college", webData.getJSONArray("college"));
if (((List<?>) fieldValue).isEmpty()) {
continue;
}
// 如果值是列表，则使用in条件
queryWrapper.in(field, (List<?>) fieldValue);
} else {
if (fieldValue == null || "".equals(fieldValue)) {
continue;
}
queryWrapper.in(field, fieldValue);
}
}
} }
// 如果queryWrapper为空,则查询全部 if (webData.containsKey("batch") && webData.getJSONArray("batch").size() > 0) {
List<CetEnglish> list = list(queryWrapper); queryWrapper.in("batch", webData.getJSONArray("batch"));
//基于学院college分组 }
Map<String, List<CetEnglish>> collegeMap = list.stream().collect(Collectors.groupingBy(CetEnglish::getCollege)); if (webData.containsKey("level") && !webData.getString("level").isEmpty()) {
// 基于学院college分组后的map再基于批次batch分组 queryWrapper.eq("level", webData.getString("level"));
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)))); }
//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 if (webData.containsKey("cultivationlevel") && !webData.getString("cultivationlevel").isEmpty()) {
queryWrapper.eq("cultivationlevel", webData.getString("cultivationlevel"));
}
if (webData.containsKey("examgrade") && !webData.getString("examgrade").isEmpty()) {
queryWrapper.eq("examgrade", webData.getString("examgrade"));
}
// 查询满足条件的数据
List<CetEnglish> cetDataList = cetEnglishMapper.selectList(queryWrapper);
// 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
Map<String, Map<String, List<CetEnglish>>> groupedData = cetDataList.stream()
.collect(Collectors.groupingBy(CetEnglish::getCollege,
Collectors.groupingBy(CetEnglish::getBatch)));
// 构建结果数据
JSONObject data = new JSONObject(); JSONObject data = new JSONObject();
for (Map.Entry<String, Map<String, List<CetEnglish>>> collegeBatchEntry : collegeBatchMap.entrySet()) { JSONArray resultList = new JSONArray();
JSONObject collegeBatchData = new JSONObject(); int totalEntries = 0;
for (Map.Entry<String, List<CetEnglish>> batchEntry : collegeBatchEntry.getValue().entrySet()) { int totalPass = 0;
JSONObject batchData = new JSONObject();
double total = batchEntry.getValue().size(); for (Map.Entry<String, Map<String, List<CetEnglish>>> collegeEntry : groupedData.entrySet()) {
double passed = 0; String college = collegeEntry.getKey();
for (CetEnglish cetEnglish : batchEntry.getValue()) { Map<String, List<CetEnglish>> gradeData = collegeEntry.getValue();
if (cetEnglish.getIspassed() == 1) {
passed++; for (Map.Entry<String, List<CetEnglish>> gradeEntry : gradeData.entrySet()) {
} String batch = gradeEntry.getKey();
} List<CetEnglish> gradeCetData = gradeEntry.getValue();
batchData.put("total", total);
batchData.put("passed", passed); int entries = gradeCetData.size();
batchData.put("passRate", Math.round(passed / total * 10000) / 100.0 + "%"); int passCount = (int) gradeCetData.stream().filter(cet -> cet.getIspassed() == 1).count();
collegeBatchData.put(batchEntry.getKey(), batchData); double passRate = (entries > 0) ? ((double) passCount / entries) * 100 : 0;
// 构建单条结果数据
JSONObject resultEntry = new JSONObject();
resultEntry.put("college", college);
resultEntry.put("batch", batch);
resultEntry.put("entries", entries);
resultEntry.put("passCount", passCount);
resultEntry.put("passRate", passRate);
resultList.add(resultEntry);
// 更新总报名人数和总通过人数
totalEntries += entries;
totalPass += passCount;
} }
data.put(collegeBatchEntry.getKey(), collegeBatchData);
} }
//返回结果
// 计算总通过率
double passRate = (totalEntries > 0) ? ((double) totalPass / totalEntries) * 100 : 0;
// 构建返回结果
data.put("resultList", resultList);
data.put("totalEntries", totalEntries);
data.put("totalPass", totalPass);
data.put("passRate", passRate);
// 返回结果
return Result.OK(data); return Result.OK(data);
} }
} }