SpringBoot应用启动慢的原因分析及优化方法

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class, HibernateJpaAutoConfiguration.class})
public class MyApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}

spring:
  autoconfigure:
    exclude:
      - org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration
      - org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration

<!-- pom.xml 中的依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- 移除不必要的依赖 -->
<!-- <dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency> -->

spring:
  main:
    lazy-initialization: true

@Component
public class DataLoader implements ApplicationRunner {

    @Override
    public void run(ApplicationArguments args) {
        // 启动后异步加载数据
        new Thread(() -> {
            // 加载数据逻辑
        }).start();
    }
}

# 保持配置文件简洁
server:
  port: 8080

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/mydb
    username: user
    password: pass

public class CustomClassLoader extends ClassLoader {
    private final Map<String, Class<?>> classes = new HashMap<>();

    @Override
    protected Class<?> findClass(String name) throws ClassNotFoundException {
        Class<?> clazz = classes.get(name);
        if (clazz == null) {
            clazz = super.findClass(name);
            classes.put(name, clazz);
        }
        return clazz;
    }
}

logging:
  level:
    root: INFO

@Component
public class CustomInitializer implements ApplicationRunner {

    @Override
    public void run(ApplicationArguments args) {
        // 优化初始化逻辑
    }
}