commit 9b6ba0c178e98a3233009737bba65f90c9aeaa43 Author: 86191 <2160251938@qq.com> Date: Thu Jul 25 08:51:56 2024 +0800 初始化 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..35410ca --- /dev/null +++ b/.idea/.gitignore @@ -0,0 +1,8 @@ +# 默认忽略的文件 +/shelf/ +/workspace.xml +# 基于编辑器的 HTTP 客户端请求 +/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..63574ec --- /dev/null +++ b/.idea/encodings.xml @@ -0,0 +1,8 @@ + + + + + + + + \ No newline at end of file diff --git a/.idea/misc.xml b/.idea/misc.xml new file mode 100644 index 0000000..13cdae7 --- /dev/null +++ b/.idea/misc.xml @@ -0,0 +1,15 @@ + + + + + + + + + + \ No newline at end of file diff --git a/pom.xml b/pom.xml new file mode 100644 index 0000000..c5d954c --- /dev/null +++ b/pom.xml @@ -0,0 +1,26 @@ + + + 4.0.0 + + org.example + rikao7 + 1.0-SNAPSHOT + + + 17 + 17 + UTF-8 + + + + + + org.projectlombok + lombok + 1.18.22 + + + + diff --git a/src/main/java/org/example/StudentApplication.java b/src/main/java/org/example/StudentApplication.java new file mode 100644 index 0000000..c404406 --- /dev/null +++ b/src/main/java/org/example/StudentApplication.java @@ -0,0 +1,48 @@ +package org.example; + +import org.example.domain.Student; + +import java.math.BigDecimal; +import java.util.HashMap; +import java.util.Map; + +public class StudentApplication { + public static void main(String[] args) { + + + // 设置编码（仅在需要时启用） + try { + System.setOut(new java.io.PrintStream(System.out,true,"UTF-8")); + } catch (java.io.UnsupportedEncodingException e) { + System.err.println("无法设置UTF-8编码：" + e.getMessage()); + } + + //创建HashMap对象 + HashMap studentHashMap = new HashMap<>(); + + //创建两个学生对象 + Student studentOne = new Student(1, "梦钰", 22, "男", new BigDecimal(100)); + Student studentTwo = new Student(2, "钰萍", 18, "女", new BigDecimal(100)); + + //保存到HashMap集合中，键为学生编号，值为学生对象 + studentHashMap.put(studentOne.getStudentId(),studentOne); + studentHashMap.put(studentTwo.getStudentId(),studentTwo); + + + System.out.println("第一种entrySet遍历方法:"); + for (Map.Entry studentEntry : studentHashMap.entrySet()) { + System.out.println("key：" + studentEntry.getKey() + " value：" + studentEntry.getValue()); + } + + System.out.println("\n第二种keySet遍历方法:"); + for (Integer student : studentHashMap.keySet()) { + System.out.println("key：" + student + " value：" + studentHashMap.get(student)); + } + + + System.out.println("\n第三种values遍历方法:"); + for (Student student : studentHashMap.values()) { + System.out.println( " value：" + student); + } + } +} diff --git a/src/main/java/org/example/domain/Student.java b/src/main/java/org/example/domain/Student.java new file mode 100644 index 0000000..9ec9d33 --- /dev/null +++ b/src/main/java/org/example/domain/Student.java @@ -0,0 +1,37 @@ +package org.example.domain; + +import lombok.AllArgsConstructor; +import lombok.Data; +import lombok.NoArgsConstructor; + +import java.math.BigDecimal; + +/** + * 学生实体类 + * 定义一个学生类Student，包括学生姓名，年龄，性别，成绩基本信息 + */ +@Data +@AllArgsConstructor +@NoArgsConstructor +public class Student { + /** + * 学生编号 + */ + private Integer studentId; + /** + * 学生名称 + */ + private String studentName; + /** + * 学生年龄 + */ + private Integer studentAge; + /** + * 学生性别 + */ + private String studentSex; + /** + * 学生成绩 + */ + private BigDecimal studentScore; +}