日考7

.gitignore

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+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.bwie</groupId>
+    <artifactId>rikao7_7.25</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>rikao7_7.25</name>
+    <description>Demo project for Spring Boot</description>
+    <properties>
+        <java.version>1.8</java.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <spring-boot.version>2.6.13</spring-boot.version>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-dependencies</artifactId>
+                <version>${spring-boot.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                    <encoding>UTF-8</encoding>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>${spring-boot.version}</version>
+                <configuration>
+                    <mainClass>com.bwie.Application</mainClass>
+                    <skip>true</skip>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>repackage</id>
+                        <goals>
+                            <goal>repackage</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

src/main/java/com/bwie/Application.java

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+package com.bwie;
+
+import com.bwie.test.Student;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Set;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+
+        Student student = new Student();
+        student.setId(1);
+        student.setStuName("张三");
+        student.setSex("男");
+        student.setSource(99);
+        Student student2 = new Student();
+        student2.setId(2);
+        student2.setStuName("李四");
+        student2.setSex("男");
+        student2.setSource(88);
+
+        HashMap<Integer, Object> map = new HashMap<>();
+        map.put(student.getId(),student);
+        map.put(student2.getId(),student2);
+
+        System.out.println("第一种:");
+        map.forEach((key,stu)->{
+            System.out.println("key:"+key+",value:"+stu);
+        });
+
+        System.out.println("第二种:");
+        for (int i=1;i<=map.size();i++){
+            Student stu = (Student) map.get(i);
+            System.out.println("key:"+i+",value:"+stu);
+        }
+        System.out.println("第三种:");
+
+        Collection<Object> values = map.values();
+        for (Object value : values) {
+            System.out.println("value:"+value);
+        }
+
+
+        SpringApplication.run(Application.class, args);
+    }
+
+}

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

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+package com.bwie.test;
+
+import lombok.Data;
+
+/**
+ * @Author：zhangzhihao
+ * @name：Student
+ * @Date：2024/7/25 8:41
+ * 不准抄代码，添加注释，清楚每一行代码意思
+ */
+@Data
+public class Student {
+    private Integer id;
+    private String stuName;
+    private String sex;
+    private Integer source;
+}

src/test/java/com/bwie/ApplicationTests.java

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+package com.bwie;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class ApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}