From 4e3c5635aaf90019751e83433353ed9de427324e Mon Sep 17 00:00:00 2001 From: LQS <2506203757@qq.com> Date: Thu, 8 Aug 2024 08:59:27 +0800 Subject: [PATCH] =?UTF-8?q?=E5=88=9D=E5=A7=8B=E5=8C=96?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .gitignore | 38 ++++++++++ .idea/.gitignore | 8 +++ .idea/encodings.xml | 7 ++ .idea/misc.xml | 14 ++++ .idea/vcs.xml | 6 ++ pom.xml | 17 +++++ src/main/java/com/muyu/pojo/Student.java | 74 ++++++++++++++++++++ src/main/java/com/muyu/test/StudentTest.java | 41 +++++++++++ 8 files changed, 205 insertions(+) create mode 100644 .gitignore create mode 100644 .idea/.gitignore create mode 100644 .idea/encodings.xml create mode 100644 .idea/misc.xml create mode 100644 .idea/vcs.xml create mode 100644 pom.xml create mode 100644 src/main/java/com/muyu/pojo/Student.java create mode 100644 src/main/java/com/muyu/test/StudentTest.java diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..5ff6309 --- /dev/null +++ b/.gitignore @@ -0,0 +1,38 @@ +target/ +!.mvn/wrapper/maven-wrapper.jar +!**/src/main/**/target/ +!**/src/test/**/target/ + +### IntelliJ IDEA ### +.idea/modules.xml +.idea/jarRepositories.xml +.idea/compiler.xml +.idea/libraries/ +*.iws +*.iml +*.ipr + +### Eclipse ### +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache + +### NetBeans ### +/nbproject/private/ +/nbbuild/ +/dist/ +/nbdist/ +/.nb-gradle/ +build/ +!**/src/main/**/build/ +!**/src/test/**/build/ + +### VS Code ### +.vscode/ + +### Mac OS ### +.DS_Store \ No newline at end of file diff --git a/.idea/.gitignore b/.idea/.gitignore new file mode 100644 index 0000000..13566b8 --- /dev/null +++ b/.idea/.gitignore @@ -0,0 +1,8 @@ +# Default ignored files +/shelf/ +/workspace.xml +# Editor-based HTTP Client requests +/httpRequests/ +# Datasource local storage ignored files +/dataSources/ +/dataSources.local.xml diff --git a/.idea/encodings.xml b/.idea/encodings.xml new file mode 100644 index 0000000..aa00ffa --- /dev/null +++ b/.idea/encodings.xml @@ -0,0 +1,7 @@ + + + + + + + \ No newline at end of file diff --git a/.idea/misc.xml b/.idea/misc.xml new file mode 100644 index 0000000..132404b --- /dev/null +++ b/.idea/misc.xml @@ -0,0 +1,14 @@ + + + + + + + + + + \ No newline at end of file diff --git a/.idea/vcs.xml b/.idea/vcs.xml new file mode 100644 index 0000000..94a25f7 --- /dev/null +++ b/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/pom.xml b/pom.xml new file mode 100644 index 0000000..3204d80 --- /dev/null +++ b/pom.xml @@ -0,0 +1,17 @@ + + + 4.0.0 + + com.icecream + zgl-rikao-day19-8-8 + 1.0-SNAPSHOT + + + 8 + 8 + UTF-8 + + + diff --git a/src/main/java/com/muyu/pojo/Student.java b/src/main/java/com/muyu/pojo/Student.java new file mode 100644 index 0000000..b01d991 --- /dev/null +++ b/src/main/java/com/muyu/pojo/Student.java @@ -0,0 +1,74 @@ +package com.muyu.pojo; + + + + +public class Student { + /** + * 编号 + */ + private int id; + /** + * 姓名 + */ + private String name; + /** + * 科目 + */ + private String subject; + /** + * 分数 + */ + private int score; + + @Override + public String toString() { + return + "编号:" + id + + "姓名:" + name + + "科目:" + subject + + "分数" + score ; + } + + public int getId() { + return id; + } + + public void setId(int id) { + this.id = id; + } + + public String getName() { + return name; + } + + public void setName(String name) { + this.name = name; + } + + public String getSubject() { + return subject; + } + + public void setSubject(String subject) { + this.subject = subject; + } + + public int getScore() { + return score; + } + + public void setScore(int score) { + this.score = score; + } + + public Student() { + } + + public Student(int id, String name, String subject, int score) { + this.id = id; + this.name = name; + this.subject = subject; + this.score = score; + } +} diff --git a/src/main/java/com/muyu/test/StudentTest.java b/src/main/java/com/muyu/test/StudentTest.java new file mode 100644 index 0000000..f05f820 --- /dev/null +++ b/src/main/java/com/muyu/test/StudentTest.java @@ -0,0 +1,41 @@ +package com.muyu.test; + + +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; + +public class StudentTest { + public static void main(String[] args) { + List studentInfoStrings = new ArrayList<>(); + //创建并添加学生信息到集合 + studentInfoStrings.add("1,张三,语文,100"); + studentInfoStrings.add("1,张三,数学,90"); + studentInfoStrings.add("2,李四,语文,95"); + studentInfoStrings.add("2,李四,数学,92"); + studentInfoStrings.add("3,王五,语文,88"); + studentInfoStrings.add("3,王五,数学,82"); + + // 打印集合 + studentInfoStrings.forEach(System.out::println); + + System.out.println("----------------------添加数据之后-----------------------"); + + Map averageScores = studentInfoStrings.stream() + .map(s -> s.split(",")) + .collect(Collectors.groupingBy( + arr -> arr[1], // 假设arr[1]是名字 + Collectors.mapping( + arr -> Integer.parseInt(arr[3]), // 假设arr[3]是分数 + Collectors.averagingInt(i -> i) + ) + )); + + // 输出平均成绩结果 + averageScores.forEach((name, avgScore) -> System.out.println(name + "的平均成绩是: " + avgScore)); + + } + + +}