日考19

day19.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4" />

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.bwie</groupId>
+    <artifactId>day19</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <parent>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <groupId>org.springframework.boot</groupId>
+        <version>2.6.2</version>
+        <relativePath/>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

src/main/java/com/bwie/domain/Student.java

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+package com.bwie.domain;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class Student {
+
+    /**
+     * 编号
+     */
+    private Integer stuId;
+    /**
+     * 姓名
+     */
+    private String stuName;
+    /**
+     * 科目
+     */
+    private String subject;
+    /**
+     * 分数
+     */
+    private String score;
+
+}

src/main/java/com/bwie/test/Test.java

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+package com.bwie.test;
+
+import com.bwie.domain.Student;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Stream;
+
+public class Test {
+
+    public static void main(String[] args) {
+
+        //1.创建5名学生(Student)对象(编号,姓名,科目,分数)。
+        Student student = new Student(1,"lina","数学","139");
+        Student student1 = new Student(2,"Nancy","化学","60");
+        Student student2 = new Student(3,"Lucy","语文","125");
+        Student student3 = new Student(4,"Lucky","英语","148");
+        Student student4 = new Student(5,"Baby","地理","29");
+
+        //2.将所有学生拼接字符串放入集合中,如：1,张三,语文,100  2,张三,数学,90
+        ArrayList<Student> students = new ArrayList<>();
+        students.forEach(student5 -> {
+            System.out.println(students);
+        });
+
+        //3.使用stream操作集合并输出每个人的名字及其平均成绩。
+
+        System.out.println(student.getStuName());
+        System.out.println(student.getScore());
+
+        System.out.println(student1.getStuName());
+        System.out.println(student1.getScore());
+
+        System.out.println(student2.getStuName());
+        System.out.println(student2.getScore());
+
+        System.out.println(student3.getStuName());
+        System.out.println(student3.getScore());
+
+        System.out.println(student4.getStuName());
+        System.out.println(student4.getScore());
+    }
+}

target/maven-archiver/pom.properties

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+artifactId=day19
+groupId=com.bwie
+version=1.0-SNAPSHOT

target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst

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+com\bwie\domain\Student$StudentBuilder.class
+com\bwie\domain\Student.class
+com\bwie\test\Test.class

target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst

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+D:\Users\Dell\Desktop\专高六资料\day19\src\main\java\com\bwie\domain\Student.java
+D:\Users\Dell\Desktop\专高六资料\day19\src\main\java\com\bwie\test\Test.java