package com.gblfy.gxts;import lombok.AllArgsConstructor; import lombok.Data; import org.junit.Before; import org.junit.Test;import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map;/*** 案例1：* 某班集中有20名學生，每名學生有5門課的考試成績。* 其中缺考的科目分數字段為空，需要找出缺考的學生都是誰？*/ public class CaseTwo {/*** 考試成績模型*/@Data@AllArgsConstructorstatic class ExamStudentSore {/*** 考生姓名*/private String studentName;/*** 考試成績*/private Integer scoreValue;/*** 科目*/private String subject;}//初始化考試成績容器Map<String, List<ExamStudentSore>> studentMap;//初始化數據@Beforepublic void init() {//聲明考試成績容器studentMap = new HashMap<>();//張三考試成績List<ExamStudentSore> zsScoreList = new ArrayList<>();zsScoreList.add(new ExamStudentSore("張三", 80, "CHINESE"));zsScoreList.add(new ExamStudentSore("張三", 90, "MATHS"));zsScoreList.add(new ExamStudentSore("張三", 100, "ENGLISH"));zsScoreList.add(new ExamStudentSore("張三", 100, "BIOLOGICAL"));zsScoreList.add(new ExamStudentSore("張三", 80, "SPORTS"));//王五考試成績List<ExamStudentSore> wwScoreList = new ArrayList<>();wwScoreList.add(new ExamStudentSore("王五", 80, "CHINESE"));wwScoreList.add(new ExamStudentSore("王五", null, "MATHS"));wwScoreList.add(new ExamStudentSore("王五", 100, "ENGLISH"));wwScoreList.add(new ExamStudentSore("王五", 100, "BIOLOGICAL"));wwScoreList.add(new ExamStudentSore("王五", 80, "SPORTS"));//趙六考試成績List<ExamStudentSore> zlScoreList = new ArrayList<>();zlScoreList.add(new ExamStudentSore("趙六", null, "CHINESE"));zlScoreList.add(new ExamStudentSore("趙六", 90, "MATHS"));zlScoreList.add(new ExamStudentSore("趙六", 100, "ENGLISH"));zlScoreList.add(new ExamStudentSore("趙六", 100, "BIOLOGICAL"));zlScoreList.add(new ExamStudentSore("趙六", 80, "SPORTS"));//將張三、王五趙六成績放入考試成績容器studentMap.put("張三", zsScoreList);studentMap.put("王五", wwScoreList);studentMap.put("趙六", zlScoreList);}/*** 查找考試缺考的學生名單列表*/@Testpublic void findNoScoreStudentList() {studentMap.forEach((studentName, studentScoreList) -> {boolean bool = studentScoreList.stream().anyMatch(score -> {return score.getScoreValue() == null;});if (bool) {System.out.println("此學生【" + studentName + "】存在缺考的現象！");}});} }

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