@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(Application.class);
        app.setApplicationStartup(new BufferingApplicationStartup(2048));
        app.run(args);
    }
}

// 優(yōu)化前：掃描整個(gè)包
@SpringBootApplication
public class Application {}

// 優(yōu)化后：只掃描需要的包
@SpringBootApplication(scanBasePackages = {
    "com.example.controller",
    "com.example.service",
    "com.example.config"
})
public class Application {}

@SpringBootApplication(exclude = {
    DataSourceAutoConfiguration.class,  // 不用數(shù)據(jù)庫時(shí)
    RedisAutoConfiguration.class,        // 不用Redis時(shí)
    MongoAutoConfiguration.class,        // 不用MongoDB時(shí)
})
public class Application {}

spring:
  autoconfigure:
    exclude:
      - org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration

spring:
  main:
    lazy-initialization: true

mybatis:
  configuration:
    lazy-loading-enabled: true
  mapper-locations: classpath:mapper/*.xml  # 精確指定，不要用**

// 不推薦
@MapperScan("com.example")

// 推薦
@Mapper
public interface UserMapper {}

spring:
  profiles:
    active: dev

---
spring:
  config:
    activate:
      on-profile: dev
      
# 開發(fā)環(huán)境關(guān)閉一些功能
springdoc:
  api-docs:
    enabled: false

management:
  endpoint:
    health:
      show-details: never

java -XX:TieredStopAtLevel=1 \
     -noverify \
     -Dspring.jmx.enabled=false \
     -jar app.jar

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-devtools</artifactId>
    <scope>runtime</scope>
</dependency>

spring:
  main:
    lazy-initialization: true

spring:
  main:
    lazy-initialization: false

spring:
  datasource:
    url: jdbc:mysql://測試環(huán)境IP:3306/testdb