1.初始化

.gitignore

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+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea
+*.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

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.muyu</groupId>
+    <artifactId>h6-exam0807</artifactId>
+    <version>1.0.0</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+        <dependencies>
+            <!-- bootstrap 启动器 -->
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-starter-bootstrap</artifactId>
+                <version>3.1.7</version>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-starter-web</artifactId>
+                <version>3.2.6</version>
+            </dependency>
+            <!-- Druid -->
+            <dependency>
+                <groupId>com.alibaba</groupId>
+                <artifactId>druid-spring-boot-starter</artifactId>
+                <version>1.2.8</version>
+            </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-autoconfigure</artifactId>
+            <version>3.2.6</version>
+        </dependency>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-starter-test</artifactId>
+                <version>3.0.4</version>
+            </dependency>
+    </dependencies>
+</project>

src/main/java/com/muyu/exam/ExamApplication.java

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+package com.muyu.exam;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+/**
+ * @version 1.0
+ * @Author xie ya ru
+ * @Date 2024/8/7 8:36
+ * @注释
+ */
+
+@SpringBootApplication
+public class ExamApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(ExamApplication.class,args);
+    }
+
+
+}

src/test/java/test/ExamTest.java

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+package test;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.stereotype.Component;
+
+import java.math.BigDecimal;
+
+/**
+ * @version 1.0
+ * @Author xie ya ru
+ * @Date 2024/8/7 8:43
+ * @注释
+ */
+@Component
+public class ExamTest {
+
+    /**
+     * 测试BigDecimal计算方法
+     */
+
+    @Test
+    public void getTest(){
+        BigDecimal bigDecimalOne = new BigDecimal(10);
+        BigDecimal bigDecimalTwo = new BigDecimal(5);
+
+        System.out.println("加法:"+bigDecimalOne.add(bigDecimalTwo));
+        System.out.println("减法:"+bigDecimalOne.subtract(bigDecimalTwo));
+        System.out.println("乘法:"+bigDecimalOne.multiply(bigDecimalTwo));
+        System.out.println("除法:"+bigDecimalOne.divide(bigDecimalTwo));
+    }
+
+}