<?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>
    <!-- Spring Boot 4.0 父依賴（統(tǒng)一管理版本） -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>4.0.0</version>
        <relativePath/>
    </parent>
    <groupId>com.example</groupId>
    <artifactId>sb4-demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sb4-demo</name>
    <!-- 核心依賴示例（Web + JPA） -->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
<scope>runtime</scope>
        </dependency>
        <!-- 測(cè)試依賴 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <!-- 構(gòu)建配置（指定 JDK 17） -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <target>17</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

# 配置 GraalVM 環(huán)境變量
export JAVA_HOME=/Users/xxx/graalvm-ce-java17-22.3.3/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH
# 驗(yàn)證安裝成功
java -version  # 輸出 GraalVM 版本信息
native-image --version  # 輸出原生鏡像構(gòu)建工具版本

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-native</artifactId>
</dependency>
<!-- 原生鏡像構(gòu)建插件 -->
<build>
    <plugins>
        <plugin>
            <groupId>org.graalvm.buildtools</groupId>
            <artifactId>native-maven-plugin</artifactId>
            <version>0.9.28</version>
            <extensions>true</extensions>
            <executions>
                <execution>
                    <id>build-native</id>
                    <goals>
                        <goal>build</goal>
                    </goals>
                    <phase>package</phase>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

# 構(gòu)建原生可執(zhí)行文件（首次構(gòu)建較慢，約 5-10 分鐘）
mvn clean package -Pnative
# 運(yùn)行原生應(yīng)用（無(wú)需 JVM，直接執(zhí)行）
./target/sb4-demo  # Mac/Linux
target\sb4-demo.exe  # Windows

import org.springframework.boot.autoconfigure.condition.ConditionalOnResource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
/**
 * 僅當(dāng) classpath 下存在 custom-config.properties 時(shí)，才加載該配置
 */
@Configuration
@ConditionalOnResource(resources = "classpath:custom-config.properties")
public class CustomAutoConfig {
    @Bean
    public String customConfig() {
        return "加載自定義配置文件成功！";
    }
}

java -jar sb4-demo.jar --debug

debug: true

Positive matches:
-----------------
   DispatcherServletAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.web.servlet.DispatcherServlet' (OnClassCondition)
      - @ConditionalOnWebApplication (required) found 'session' scope (OnWebApplicationCondition)
Negative matches:
-----------------
   DataSourceAutoConfiguration did not match:
      - @ConditionalOnClass did not find required class 'javax.sql.DataSource' (OnClassCondition)

server:
  port: 8443  # HTTP/3 依賴 HTTPS，需使用 443 或自定義 HTTPS 端口
  http3:
    enabled: true  # 開(kāi)啟 HTTP/3
  ssl:
    enabled: true  # 強(qiáng)制 HTTPS
    key-store: classpath:keystore.p12  # 證書(shū)文件（自行生成或從 CA 申請(qǐng)）
    key-store-password: 123456
    key-store-type: PKCS12
    key-alias: sb4-demo

keytool -genkeypair -alias sb4-demo -keyalg RSA -keysize 2048 -storetype PKCS12 -keystore keystore.p12 -validity 3650

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import reactor.core.publisher.Mono;
@RestController
public class ReactiveMvcController {
    /**
     * Spring MVC 接口直接返回 Mono（響應(yīng)式類型）
     */
    @GetMapping("/reactive/hello")
    public Mono<String> reactiveHello() {
        // 模擬異步操作（如調(diào)用第三方接口）
        return Mono.just("Spring Boot 4.0 MVC + 響應(yīng)式，無(wú)需 WebFlux！")
                   .delayElement(java.time.Duration.ofSeconds(1));
    }
}

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.testcontainers</groupId>
    <artifactId>mysql</artifactId>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.testcontainers</groupId>
    <artifactId>junit-jupiter</artifactId>
    <scope>test</scope>
</dependency>

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.testcontainers.service.connection.ServiceConnection;
import org.springframework.jdbc.core.JdbcTemplate;
import org.testcontainers.containers.MySQLContainer;
import org.testcontainers.junit.jupiter.Container;
import org.testcontainers.junit.jupiter.Testcontainers;
import org.testcontainers.utility.DockerImageName;
import static org.junit.jupiter.api.Assertions.assertEquals;
/**
 * Testcontainers 自動(dòng)管理 MySQL 容器，無(wú)需手動(dòng)配置
 */
@Testcontainers  // 自動(dòng)啟動(dòng)/停止容器
@SpringBootTest
public class MysqlTestcontainersTest {
    // 啟動(dòng) MySQL 8.0 容器（自動(dòng)拉取鏡像）
    @Container  // 標(biāo)記為測(cè)試容器
    @ServiceConnection  // 自動(dòng)綁定數(shù)據(jù)源，無(wú)需配置 spring.datasource.url 等信息
    static MySQLContainer<?> mysqlContainer = new MySQLContainer<>(DockerImageName.parse("mysql:8.0"))
            .withDatabaseName("testdb")
            .withUsername("test")
            .withPassword("test123");
    @Autowired
    private JdbcTemplate jdbcTemplate;
    @Test
    void testMysqlConnection() {
        // 測(cè)試數(shù)據(jù)源連接是否正常
        Integer result = jdbcTemplate.queryForObject("SELECT 1", Integer.class);
        assertEquals(1, result);
    }
}

management:
  endpoints:
    web:
      exposure:
        include: health,info,native,metrics  # 暴露原生鏡像端點(diǎn)（/actuator/native）
  health:
    groups:  # 自定義健康檢查分組
      db-group:  # 分組 1：僅檢查數(shù)據(jù)庫(kù)健康
        include: db
      cache-group:  # 分組 2：僅檢查緩存健康
        include: redis
  endpoint:
    health:
      show-details: always  # 顯示健康檢查詳細(xì)信息

// 舊版（Spring Boot 2.x/3.x 早期）
import javax.servlet.http.HttpServletRequest;
import javax.persistence.Entity;
// 新版（Spring Boot 4.0）
import jakarta.servlet.http.HttpServletRequest;
import jakarta.persistence.Entity;

import org.springframework.nativex.hint.NativeHint;
import org.springframework.nativex.hint.TypeHint;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
// 為反射類添加原生鏡像提示
@NativeHint(types = @TypeHint(types = com.example.sb4demo.entity.User.class))
@SpringBootApplication
public class Sb4DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(Sb4DemoApplication.class, args);
    }
}