锟斤拷锟斤拷位锟矫ｏ拷锟斤拷页 > 锟斤拷锟斤拷锟教筹拷 > 锟教筹拷 > 锟斤拷锟脚讹拷锟芥：SpringBoot锟斤拷取锟斤拷锟斤拷锟斤拷锟饺硷拷顺锟斤拷锟斤拷什么锟斤拷

锟斤拷锟脚讹拷锟芥：SpringBoot锟斤拷取锟斤拷锟斤拷锟斤拷锟饺硷拷顺锟斤拷锟斤拷什么锟斤拷

锟斤拷源锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷|锟斤拷时锟戒：2024-05-09 11:56:01 |锟斤拷锟侥讹拷锟斤拷108锟斤拷|锟斤拷锟斤拷签锟斤拷 T Ri S in 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 |锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷戏

锟斤拷锟斤拷

Spring Boot锟斤拷为一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Java应锟矫筹拷锟斤拷锟杰ｏ拷锟斤拷锟戒开锟戒即锟矫★拷锟斤拷锟劫搭建锟斤拷锟斤拷目锟斤拷锟斤拷锟斤拷赢锟斤拷锟剿癸拷罂锟斤拷叩锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之一锟斤拷锟角硷拷锟斤拷锟矫癸拷锟教ｏ拷使锟斤拷锟斤拷锟斤拷锟杰癸拷锟斤拷锟斤拷锟斤拷应锟斤拷锟接讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷实锟斤拷锟斤拷一锟姐，Spring Boot支锟街丰富锟斤拷锟解部锟斤拷锟斤拷锟矫伙拷锟狡ｏ拷锟斤拷锟斤拷应锟矫筹拷锟斤拷锟斤拷莶锟酵拷牟锟斤拷鸹肪锟斤拷锟斤拷锟斤拷锟斤拷锟接︼拷锟斤拷锟斤拷锟斤拷锟斤拷裕锟斤拷锟斤拷锟斤拷锟斤拷薷拇锟斤拷氡撅拷锟斤拷锟�

锟斤拷Spring Boot锟斤拷态系统锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟皆匡拷锟皆从革拷锟斤拷锟斤拷源锟斤拷取锟斤拷锟斤拷锟界：Java锟斤拷锟斤拷锟侥硷拷锟斤拷YAML锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫诧拷锟斤拷锟饺★拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟杰癸拷锟斤拷锟斤拷锟斤拷时锟斤拷态注锟诫到Bean锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷系统锟侥匡拷锟斤拷展锟皆和匡拷锟斤拷锟斤拷锟皆★拷然锟斤拷锟斤拷为锟斤拷确锟斤拷一锟斤拷锟皆和凤拷止锟斤拷锟矫筹拷突锟斤拷Spring Boot锟节硷拷锟斤拷锟斤拷些锟解部锟斤拷锟斤拷时锟斤拷循一锟斤拷锟较革拷锟斤拷锟斤拷燃锟剿筹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷燃锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷锟轿拷锟街憋拷锟接帮拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫э拷锟斤拷锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接︼拷贸锟斤拷锟斤拷锟斤拷为模式锟斤拷

锟斤拷锟侥斤拷锟斤拷锟斤拷探锟斤拷Spring Boot锟斤拷锟斤拷锟解部锟斤拷锟斤拷锟斤拷锟皆碉拷锟斤拷锟饺硷拷锟斤拷锟斤拷锟疥尽锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源锟侥硷拷锟斤拷顺锟津，诧拷锟斤拷锟绞碉拷锟接︼拷贸锟斤拷锟斤拷锟斤拷锟剿碉拷锟斤拷锟斤拷员锟斤拷锟斤拷锟斤拷芄锟斤拷锟斤拷锟叫э拷毓锟斤拷锟斤拷锟角拷锟斤拷锟斤拷茫锟饺凤拷锟斤拷诓锟酵拷锟斤拷锟斤拷锟接︼拷贸锟斤拷锟斤拷锟斤拷榷锟斤拷锟阶既凤拷锟斤拷锟斤拷小锟�

Spring Boot锟解部锟斤拷锟斤拷锟矫革拷锟斤拷

Spring Boot锟侥猴拷锟侥硷拷值之一锟斤拷锟斤拷锟斤拷强锟斤拷锟斤拷獠匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟接︼拷贸锟斤拷锟斤拷芄锟斤拷诓锟斤拷谋锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷应锟斤拷同锟斤拷锟斤拷锟叫伙拷锟斤拷锟斤拷锟解部锟斤拷锟斤拷锟斤拷锟斤拷味锟脚斤拷应锟矫筹拷锟斤拷墓丶锟斤拷锟斤拷锟斤拷锟较拷锟斤拷锟接︼拷贸锟斤拷锟斤拷锟斤拷之锟解，锟斤拷锟节革拷锟捷诧拷同锟斤拷锟斤拷锟斤拷锟界开锟斤拷锟斤拷锟斤拷锟皆★拷锟斤拷锟斤拷锟饺ｏ拷锟斤拷锟叫讹拷锟狡伙拷锟斤拷锟矫★拷Spring Boot锟结供锟剿讹拷锟斤拷锟斤拷锟斤拷锟解部锟斤拷锟斤拷源锟皆硷拷锟斤拷莸锟斤拷锟斤拷锟阶拷敕绞斤拷锟绞癸拷锟斤拷锟斤拷锟斤拷锟斤拷没锟斤拷票锟斤拷锟届常锟斤拷锟斤拷锟斤拷锟斤拷诠锟斤拷锟斤拷锟�

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源

Spring Boot支锟街讹拷锟斤拷锟斤拷锟酵碉拷锟解部锟斤拷锟斤拷源锟斤拷锟斤拷要锟斤拷锟斤拷锟铰硷拷锟斤拷锟斤拷锟芥：

Properties锟侥硷拷:
通锟斤拷使锟斤拷 .properties 锟斤拷式锟斤拷锟斤拷锟矫硷拷值锟皆碉拷锟斤拷式锟芥储锟斤拷锟斤拷锟斤拷息锟斤拷

server.port=8080
logging.level.root=DEBUG

YAML锟侥硷拷锟斤拷
锟斤拷锟斤拷诖锟酵筹拷锟絧roperties锟侥硷拷锟斤拷YAML锟结供锟剿革拷直锟桔★拷锟斤拷胃锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷萁峁癸拷锟斤拷锟斤拷锟斤拷屎洗娲拷锟斤拷锟斤拷锟斤拷谩锟绞癸拷锟� .yml 锟斤拷式锟斤拷

server:
  port: 8080
logging:
  level:
    root: DEBUG

锟斤拷锟斤拷锟斤拷锟斤拷 锟斤拷
锟斤拷锟斤拷系统锟斤拷锟斤拷幕锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷员锟絊pring Boot识锟斤拷锟斤拷为锟斤拷锟斤拷源锟斤拷锟斤拷锟斤拷锟斤拷苹锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿碉拷谩锟�
锟斤拷锟斤拷锟叫诧拷锟斤拷 锟斤拷
锟斤拷锟斤拷Spring Boot应锟斤拷时锟斤拷锟斤拷锟皆达拷锟斤拷锟斤拷锟斤拷锟叫诧拷锟斤拷锟斤拷锟斤拷 -- 锟斤拷头锟斤拷直锟接革拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫★拷

锟斤拷锟斤拷注锟诫方式

锟斤拷Spring Boot锟叫ｏ拷锟解部锟斤拷锟矫碉拷锟斤拷锟斤拷值锟斤拷锟斤拷通锟斤拷锟斤拷锟铰硷拷锟街凤拷式锟斤拷锟斤拷锟阶拷氲紹ean锟叫★拷

@Value 注锟斤拷 锟斤拷锟斤拷锟斤拷直锟斤拷锟斤拷锟街段或方凤拷锟斤拷锟斤拷锟斤拷使锟矫达拷注锟解，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷值注锟诫到目锟斤拷锟斤拷锟斤拷小锟�
Environment 锟接匡拷 锟斤拷Spring锟斤拷锟斤拷峁╋拷幕锟斤拷锟斤拷锟斤拷锟斤拷啵拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖拷锟斤拷锟斤拷鸭锟斤拷氐锟斤拷锟斤拷锟斤拷锟较拷锟�
@ConfigurationProperties 注锟斤拷 锟斤拷锟斤拷锟节帮拷一锟斤拷锟斤拷锟斤拷锟斤拷玫锟揭伙拷锟阶拷诺锟絁ava Bean锟叫ｏ拷锟结供锟斤拷锟结构锟斤拷锟斤拷锟斤拷锟矫癸拷锟斤拷锟斤拷式锟斤拷

锟斤拷锟矫硷拷锟斤拷锟斤拷锟饺硷拷

Spring Boot锟斤拷锟斤拷锟皆诧拷同锟斤拷锟斤拷源锟斤拷同锟斤拷锟斤拷锟皆匡拷锟皆帮拷锟斤拷一锟斤拷锟斤拷锟斤拷锟饺硷拷顺锟斤拷锟斤拷懈锟斤拷恰锟斤拷锟斤拷锟斤拷燃锟斤拷锟斤拷系锟斤拷卤锟竭ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆达拷锟斤拷锟斤拷锟角帮拷锟斤拷锟斤拷锟斤拷源锟斤拷

默锟斤拷锟斤拷锟皆ｏ拷通锟斤拷 SpringApplication.setDefaultProperties 锟斤拷锟斤拷锟斤拷锟矫ｏ拷
@PropertySource 注锟斤拷锟斤拷氐锟斤拷锟斤拷锟�
Config Data锟斤拷锟斤拷锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟斤拷锟斤拷锟侥硷拷系统锟斤拷锟斤拷锟斤拷jar锟叫碉拷application.properties锟斤拷application-{profile}.properties锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷源锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟较低筹拷锟斤拷浴锟絁NDI锟斤拷锟皆等ｏ拷
Servlet锟斤拷锟斤拷锟斤拷氐某锟绞硷拷锟斤拷锟斤拷锟�
SPRING_APPLICATION_JSON锟斤拷式锟侥伙拷锟斤拷锟斤拷锟斤拷锟斤拷系统锟斤拷锟斤拷
锟斤拷锟斤拷锟叫诧拷锟斤拷
锟斤拷锟斤拷锟斤拷氐锟斤拷锟斤拷锟阶拷敕绞斤拷锟斤拷锟� @SpringBootTest 锟斤拷 @DynamicPropertySource 锟斤拷 @TestPropertySource 锟斤拷

锟斤拷锟斤拷锟斤拷锟饺硷拷顺锟斤拷锟斤拷源锟节癸拷锟斤拷锟斤拷 Spring Boot Reference Documentation

Spring Boot锟斤拷锟矫硷拷锟斤拷顺锟斤拷锟斤拷锟�

默锟斤拷锟斤拷锟斤拷

默锟斤拷锟斤拷锟斤拷锟斤拷指Spring Boot锟斤拷锟斤拷锟斤拷玫锟揭恍┠拷锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷诖锟斤拷锟� SpringApplication 实锟斤拷时锟斤拷通锟斤拷锟斤拷锟斤拷 setDefaultProperties(Map defaultProperties) 锟斤拷锟斤拷锟斤拷锟结供一锟斤拷默锟斤拷锟斤拷锟皆ｏ拷锟斤拷些锟斤拷锟皆斤拷锟斤拷锟斤拷锟饺硷拷锟截ｏ拷锟斤拷锟斤拷也锟结被锟斤拷锟斤拷锟斤拷锟矫革拷锟角★拷

@SpringBootApplication
public class SpringBootBaseApplication {

	public static void main(String[] args) {
		Map defaultProperties = new HashMap<>();
		defaultProperties.put("server.port", "9000"); // 锟皆讹拷锟斤拷默锟较端匡拷
		SpringApplication app = new SpringApplication(SpringBootBaseApplication.class);
		app.setDefaultProperties(defaultProperties);
		app.run(args);
	}
}

美团二面：SpringBoot读取配置优先级顺序是什么？

@PropertySource注锟斤拷

@PropertySource 注锟斤拷锟斤拷锟斤拷锟斤拷Spring Boot锟斤拷 @Configuration 锟斤拷锟较硷拷锟斤拷锟解部锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷 @PropertySource 时锟斤拷锟斤拷要注锟斤拷锟斤拷牵锟斤拷锟叫╋拷锟斤拷锟皆达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拥锟絊pring锟斤拷 Environment 锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷Spring应锟斤拷锟斤拷锟斤拷锟斤拷刷锟铰ｏ拷refresh锟斤拷锟阶段才会被锟斤拷锟斤拷锟斤拷锟截诧拷锟较诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫★拷

锟斤拷锟斤拷趣锟侥匡拷锟皆革拷一锟斤拷源锟诫， org.springframework.context.support.AbstractApplicationContext#invokeBeanFactoryPostProcessors 锟斤拷执锟叫的★拷

Spring Boot锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷丝冢锟絪erver.port锟斤拷锟斤拷锟斤拷志锟斤拷艿某锟绞硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟街撅拷锟斤拷锟斤拷锟斤拷茫锟斤拷龋锟揭诧拷锟斤拷锟接︼拷锟斤拷锟斤拷锟斤拷锟剿拷锟街帮拷捅锟斤拷锟饺★拷锟接︼拷玫摹锟斤拷锟剿ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟节撅拷锟斤拷要锟斤拷取锟斤拷锟斤拷锟矫ｏ拷应锟斤拷直锟斤拷锟斤拷 application.properties 锟斤拷锟竭伙拷锟斤拷锟斤拷锟斤拷锟饺革拷锟界被锟斤拷锟截碉拷锟斤拷锟斤拷源锟叫斤拷锟斤拷锟斤拷锟矫★拷

锟斤拷锟角达拷锟斤拷一锟斤拷 propertysource.properties 锟侥硷拷锟斤拷

server.port = 9001
coderacademy.name = CoderAcademy

然锟斤拷锟斤拷锟斤拷锟斤拷 @Configuration 锟斤拷锟斤拷锟斤拷使锟斤拷 @PropertySource 锟斤拷锟斤拷 propertysource.properties 锟侥硷拷锟斤拷

@PropertySource(value = "classpath:propertysource.properties")
@Configuration
public class MyConfig {

}

锟斤拷锟斤拷锟斤拷应锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟矫ｏ拷

@SpringBootApplication
public class SpringBootBaseApplication {

	public static void main(String[] args) {
		Map defaultProperties = new HashMap<>();
		defaultProperties.put("server.port", "9000"); // 锟皆讹拷锟斤拷默锟较端匡拷
		SpringApplication app = new SpringApplication(SpringBootBaseApplication.class);
		app.setDefaultProperties(defaultProperties);
		ConfigurableApplicationContext context = app.run(args);
		Environment environment = context.getEnvironment();
		System.out.println("coderacademy.name: " + environment.getProperty("coderacademy.name"));
	}
}

锟斤拷印锟斤拷锟斤拷锟�
美团二面：SpringBoot读取配置优先级顺序是什么？

锟斤拷锟皆匡拷锟斤拷 server.port 锟斤拷锟斤拷锟�9001锟斤拷锟斤拷 @PropertySource 锟斤拷锟截碉拷锟斤拷锟矫革拷锟斤拷锟斤拷 SpringBoot 默锟较碉拷锟斤拷锟斤拷值锟斤拷

Config Data锟斤拷锟斤拷锟斤拷锟斤拷锟捷ｏ拷

Config Data锟斤拷锟斤拷锟斤拷锟斤拷锟捷ｏ拷锟斤拷Spring Boot锟斤拷锟斤拷锟斤拷锟解部锟斤拷应锟斤拷锟斤拷锟矫的猴拷锟侥诧拷锟街★拷锟斤拷要锟斤拷锟节诧拷锟斤拷锟斤拷锟侥硷拷锟皆硷拷锟解部锟斤拷锟斤拷锟侥硷拷锟斤拷

锟节诧拷锟斤拷锟斤拷锟侥硷拷

锟节诧拷锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷锟斤拷锟接︼拷锟斤拷锟斤拷锟斤拷募锟斤拷锟轿伙拷锟斤拷锟侥匡拷锟斤拷锟斤拷锟斤拷jar锟斤拷锟节诧拷锟斤拷位锟斤拷 src/main/resource 目录锟铰碉拷锟侥硷拷锟斤拷

美团二面：SpringBoot读取配置优先级顺序是什么？

锟解部锟斤拷锟斤拷锟侥硷拷

锟斤拷锟皆斤拷锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷jar锟斤拷锟斤拷锟斤拷锟侥筹拷锟铰凤拷锟斤拷隆锟斤拷锟斤拷址锟绞斤拷锟斤拷锟斤拷锟斤拷诓锟斤拷薷锟絡ar锟斤拷锟斤拷锟斤拷锟斤拷卤锟斤拷锟斤拷锟矫★拷锟斤拷锟斤拷锟斤拷锟斤拷使锟矫碉拷锟斤拷锟斤拷锟斤拷锟斤拷( nacos 锟斤拷 apollo 锟斤拷)锟斤拷也锟斤拷锟斤拷通锟斤拷 spring.config.location 锟斤拷锟斤拷 spring.config.additional-location 指锟斤拷锟斤拷锟侥硷拷锟饺★拷

SpringBoot锟斤拷锟斤拷锟斤拷时锟斤拷默锟较达拷锟截讹拷锟斤拷目录锟叫硷拷锟斤拷锟斤拷些锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷锟角匡拷锟皆达拷 ConfigDataEnvironment 锟斤拷锟揭碉拷锟斤拷些目录锟斤拷

美团二面：SpringBoot读取配置优先级顺序是什么？

锟斤拷目录锟侥硷拷锟斤拷顺锟斤拷锟缴低碉拷锟斤拷为锟斤拷

file:./
file:./config/
file:./config/*/
classpath:/
classpath:/config/

锟斤拷锟斤拷 file 锟斤拷锟斤拷应锟矫革拷目录锟铰碉拷锟侥硷拷锟斤拷锟斤拷 classpath 为 resources 锟铰碉拷锟侥硷拷锟斤拷

锟斤拷些锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺硷拷顺锟斤拷锟缴低碉拷锟斤拷为锟斤拷

classpath:/
classpath:/config/
file:./
file:./config/
file:./config/*/

锟斤拷锟斤拷锟斤拷锟斤拷SpringBoot2.7锟芥本锟斤拷
锟斤拷锟斤拷SpringBoot锟斤拷锟斤拷锟节诧拷锟斤拷锟斤拷锟侥硷拷锟斤拷执锟斤拷锟斤拷锟斤拷锟皆硷拷原锟斤拷锟斤拷锟斤拷慰锟斤拷锟�
锟斤拷为锟斤拷锟芥：SpringBoot锟斤拷取_锟斤拷锟斤拷锟侥硷拷_锟斤拷原锟斤拷锟斤拷什么锟斤拷锟斤拷锟斤拷顺锟斤拷锟斤拷什么锟斤拷

锟斤拷锟角分憋拷锟斤拷锟斤拷些目录锟铰达拷锟斤拷锟斤拷锟斤拷锟侥硷拷 application.properties 锟斤拷

美团二面：SpringBoot读取配置优先级顺序是什么？

锟斤拷锟斤拷锟节讹拷应锟侥硷拷锟斤拷写锟斤拷锟斤拷锟角碉拷目录路锟斤拷锟斤拷

1: config.data.path = classpath:./
2: config.data.path = classpath:./config/
3: config.data.path = file:./
4: config.data.path = file:./config/
5: config.data.path = file:./config/dev

锟斤拷锟斤拷锟斤拷SpringBoot锟斤拷锟斤拷时锟斤拷印 config.data.path 锟斤拷值锟斤拷

@SpringBootApplication
public class SpringBootConfigApplication {

	public static void main(String[] args) {
		Map defaultProperties = new HashMap<>();
		defaultProperties.put("server.port", "9000"); // 锟皆讹拷锟斤拷默锟较端匡拷
		SpringApplication app = new SpringApplication(SpringBootConfigApplication.class);
		app.setDefaultProperties(defaultProperties);
		ConfigurableApplicationContext context = app.run(args);
		Environment environment = context.getEnvironment();
		System.out.println("config.data.path: " + environment.getProperty("config.data.path"));
	}
}

锟斤拷锟角分诧拷锟斤拷锟斤拷锟斤拷证锟斤拷锟斤拷锟斤拷证1,2锟斤拷锟斤拷印锟斤拷锟�:

config.data.path: classpath:./config/

锟斤拷锟斤拷锟斤拷证1,2,3锟斤拷锟斤拷印锟斤拷锟斤拷锟�

config.data.path: file:./

锟斤拷证1,2,3,4,锟斤拷印锟斤拷锟斤拷锟�

config.data.path: file:./config/

锟斤拷证1,2,3,4,5,锟斤拷印锟斤拷锟斤拷锟�

config.data.path: file:./config/dev

锟斤拷锟街碉拷锟斤拷锟皆�

RandomValuePropertySource 锟斤拷Spring Boot锟叫ｏ拷 RandomValuePropertySource 锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源锟节固讹拷锟斤拷锟斤拷锟斤拷锟侥硷拷锟津环撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Spring Boot锟斤拷锟斤拷锟斤拷锟斤拷锟绞憋拷远锟斤拷锟斤拷印锟斤拷锟斤拷锟斤拷锟斤拷源锟结供锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 random.* 锟斤拷头锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷纾拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷锟斤拷 random.int 锟斤拷 random.long 锟斤拷锟斤拷锟皆ｏ拷Spring Boot锟斤拷锟斤拷锟斤拷时锟斤拷为锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷一些锟斤拷时锟斤拷锟斤拷锟街碉拷某锟斤拷锟斤拷浅锟斤拷锟斤拷茫锟斤拷锟斤拷锟绞憋拷锟斤拷搿拷锟斤拷锟斤拷锟皆匡拷取锟�

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 application.properties 锟斤拷锟斤拷锟斤拷 random.int=100

random.int=100

锟斤拷锟斤拷锟斤拷SpringBoot锟斤拷锟斤拷时锟斤拷取``random.int`锟斤拷值锟斤拷

@SpringBootApplication
public class ConfigApplication
{
    public static void main( String[] args )
    {
        SpringApplication app = new SpringApplication(ConfigApplication.class);
        ConfigurableApplicationContext context = app.run(args);
        Environment environment = context.getEnvironment();
        System.out.println("random.int: " + environment.getProperty("random.int"));
    }
}

锟斤拷印锟斤拷锟轿拷锟�

random.int: -510589238

锟斤拷锟斤拷每锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷应锟矫ｏ拷锟斤拷印锟侥斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟�

锟斤拷锟斤拷系统锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷Spring Boot锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源锟斤拷Spring Boot锟斤拷锟皆讹拷锟斤拷獠拷锟斤拷锟斤拷锟叫╋拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿︼拷玫锟斤拷锟斤拷锟斤拷锟斤拷浴锟斤拷锟斤拷纾拷锟斤拷锟节诧拷锟斤拷系统锟斤拷锟斤拷锟斤拷锟剿伙拷锟斤拷锟斤拷锟斤拷 MY_APP_PORT=8080 锟斤拷锟斤拷么锟斤拷Spring Boot应锟斤拷锟叫匡拷锟斤拷通锟斤拷 ${MY_APP_PORT} 锟斤拷锟斤拷锟斤拷锟斤拷锟街碉拷锟�

锟斤拷锟斤拷锟斤拷锟矫伙拷锟斤拷锟斤拷锟斤拷为 config.data.path=锟斤拷锟斤拷锟斤拷锟斤拷 :

美团二面：SpringBoot读取配置优先级顺序是什么？

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫ｏ拷锟斤拷然锟斤拷印 config.data.path 锟侥斤拷锟轿拷锟�

config.data.path: 锟斤拷锟斤拷锟斤拷锟斤拷

Java系统锟斤拷锟斤拷

Java系统锟斤拷锟斤拷锟斤拷通锟斤拷 System.setProperty() 锟斤拷锟斤拷锟斤拷锟斤拷一系锟叫硷拷值锟皆★拷

@SpringBootApplication
public class ConfigApplication
{
    static {
        System.setProperty("config.data.path", "SystemProperty"); // 锟斤拷锟斤拷系统锟斤拷锟斤拷
    }

    public static void main( String[] args )
    {
        SpringApplication app = new SpringApplication(ConfigApplication.class);
        ConfigurableApplicationContext context = app.run(args);
        Environment environment = context.getEnvironment();
        System.out.println("config.data.path: " + environment.getProperty("config.data.path"));
    }
}

锟斤拷印锟斤拷锟轿拷锟�

config.data.path: SystemProperty

SPRING_APPLICATION_JSON锟斤拷锟斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷嵌JSON锟斤拷锟斤拷

SPRING_APPLICATION_JSON 锟斤拷 Spring Boot 锟结供锟斤拷一锟街伙拷锟狡ｏ拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 JSON 锟斤拷式锟斤拷锟斤拷锟矫革拷应锟矫筹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷莼岜伙拷锟斤拷锟斤拷锟揭伙拷锟� JSON 锟斤拷锟襟，诧拷锟较诧拷锟斤拷Spring锟斤拷 Environment 锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源一锟斤拷锟斤拷

@SpringBootApplication
public class ConfigApplication
{
    static {
        System.setProperty("config.data.path", "SystemProperty"); // 锟斤拷锟斤拷系统锟斤拷锟斤拷
        System.setProperty("SPRING_APPLICATION_JSON", "{\"config.data.path\":\"SPRING_APPLICATION_JSON锟斤拷锟斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷嵌JSON锟斤拷锟斤拷\"}");
    }

    public static void main( String[] args )
    {
        SpringApplication app = new SpringApplication(ConfigApplication.class);
        ConfigurableApplicationContext context = app.run(args);
        Environment environment = context.getEnvironment();
        System.out.println("config.data.path: " + environment.getProperty("config.data.path"));
    }
}

锟斤拷印锟斤拷锟斤拷锟�

config.data.path: SPRING_APPLICATION_JSON锟斤拷锟斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷嵌JSON锟斤拷锟斤拷

锟斤拷锟斤拷锟叫诧拷锟斤拷

锟斤拷锟斤拷Spring Boot应锟斤拷时锟斤拷锟斤拷锟斤拷直锟斤拷通锟斤拷锟斤拷锟斤拷锟叫诧拷锟斤拷锟斤拷锟斤拷锟角伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆★拷锟斤拷锟斤拷锟叫诧拷锟斤拷通锟斤拷锟斤拷 -- 锟斤拷头锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟� --server.port=8080 锟斤拷锟斤拷锟街凤拷式锟斤拷锟斤拷锟节诧拷锟睫革拷锟斤拷锟斤拷锟侥硷拷锟斤拷前锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷应锟斤拷锟斤拷锟矫★拷锟斤拷锟斤拷锟叫诧拷锟斤拷锟斤拷锟叫较高碉拷锟斤拷锟饺硷拷锟斤拷锟斤拷锟皆革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源锟叫碉拷锟斤拷锟斤拷值锟斤拷

锟斤拷锟斤拷使锟斤拷 java -jar 锟斤拷锟斤拷SpringBoot锟斤拷

java -jar ./springboot-config-1.0-SNAPSHOT.jar --config.data.path=锟斤拷锟斤拷锟叫诧拷锟斤拷

锟斤拷印锟斤拷锟轿拷锟�

config.data.path: 锟斤拷锟斤拷锟叫诧拷锟斤拷

锟斤拷锟斤拷SpringBoot锟斤拷jar锟斤拷锟斤拷锟斤拷锟斤拷通锟斤拷java -jar锟斤拷锟斤拷直锟斤拷执锟叫碉拷原锟斤拷锟斤拷慰锟斤拷锟� 锟街节讹拷锟芥：为什么SpringBoot锟斤拷?jar?锟斤拷锟斤拷直锟斤拷锟斤拷锟叫ｏ拷锟斤拷说锟斤拷嵌锟斤拷Tomcat锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭筹拷锟斤拷锟斤拷转

锟斤拷锟斤拷锟斤拷锟斤拷锟侥革拷锟斤拷锟斤拷锟叫关碉拷锟斤拷锟矫ｏ拷锟斤拷锟角就诧拷一一细说锟斤拷

锟杰斤拷

Spring Boot锟斤拷锟矫硷拷锟斤拷锟斤拷锟饺硷拷锟斤拷锟斤拷凭锟斤拷锟斤拷锟皆讹拷锟绞碉拷锟斤拷锟斤拷锟斤拷锟斤拷要锟皆★拷锟斤拷一锟斤拷锟斤拷确锟斤拷锟斤拷应锟斤拷锟节诧拷同锟斤拷锟斤拷锟酵诧拷锟金场撅拷锟铰的高讹拷锟斤拷锟斤拷院涂锟斤拷锟街诧拷裕锟酵币诧拷锟斤拷锟斤拷锟斤拷锟斤拷丝锟斤拷锟斤拷锟斤拷锟轿拷哦拥锟斤拷锟斤拷锟斤拷锟斤拷锟叫э拷省锟�

锟斤拷锟饺硷拷顺锟斤拷锟斤拷辖锟斤拷锟绞癸拷每锟斤拷锟斤拷锟斤拷芄锟斤拷锟较革拷乜锟斤拷锟斤拷锟斤拷玫母锟斤拷遣慵讹拷锟斤拷佣锟绞雇伙拷荽锟斤拷锟斤拷锟皆革拷锟捷诧拷同锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷夭锟酵拷锟斤拷锟斤拷锟斤拷锟斤拷浴锟斤拷锟斤拷纾拷诳锟斤拷锟斤拷锟斤拷锟斤拷院锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷蟹直锟斤拷锟斤拷貌锟酵拷锟斤拷锟斤拷菘锟斤拷锟斤拷印锟斤拷锟街撅拷锟斤拷锟斤拷API锟斤拷钥锟斤拷锟斤拷锟斤拷锟斤拷息锟斤拷锟斤拷锟斤拷锟斤拷锟节达拷锟斤拷锟斤拷硬锟斤拷锟诫。

Spring Boot锟斤拷锟斤拷锟矫硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺匡拷锟斤拷锟斤拷默锟斤拷锟斤拷锟矫ｏ拷然锟斤拷锟金步硷拷锟斤拷锟矫伙拷通锟斤拷 @PropertySource 注锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆达拷锟斤拷锟斤拷锟斤拷jar锟斤拷锟斤拷锟斤拷母锟斤拷锟絘pplication.properties锟斤拷application-{profile}.properties锟斤拷YAML锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷系统锟斤拷锟皆ｏ拷直锟斤拷锟斤拷锟斤拷锟叫诧拷锟斤拷锟饺★拷锟斤拷锟街分诧拷锟斤拷夭锟斤拷锟饺凤拷锟斤拷锟皆斤拷锟斤拷锟斤拷锟斤拷锟斤拷源拥锟叫革拷锟竭碉拷锟斤拷锟饺硷拷锟斤拷锟接讹拷锟斤拷锟皆革拷锟斤拷之前锟斤拷锟斤拷锟矫ｏ拷锟斤拷也锟斤拷锟斤拷锟斤拷锟斤拷锟矫碉拷锟斤拷锟斤拷院图锟绞憋拷浴锟�

锟斤拷锟解并锟斤拷锟斤拷锟斤拷锟斤拷Spring Boot锟斤拷锟矫硷拷锟截碉拷锟斤拷锟饺硷拷锟斤拷锟斤拷锟节憋拷锟斤拷应锟矫的帮拷全锟皆★拷锟斤拷维锟斤拷锟斤拷锟皆硷拷锟斤拷锟酵诧拷锟斤拷锟接讹拷锟斤拷锟斤拷锟斤拷要锟斤拷锟截憋拷锟斤拷锟节达拷锟侥Ｎ拷锟斤拷锟杰癸拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫癸拷锟斤拷锟斤拷迁锟狡讹拷锟斤拷锟斤拷锟斤拷系统锟斤拷锟饺讹拷锟斤拷锟斤拷锟脚诧拷锟缴猴拷锟接碉拷锟斤拷锟矫★拷通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺硷拷锟斤拷锟斤拷锟斤拷锟狡控ｏ拷锟斤拷锟斤拷锟竭猴拷锟斤拷维锟斤拷员锟杰癸拷锟斤拷锟斤拷应锟皆革拷锟接伙拷锟斤拷锟铰碉拷锟斤拷锟矫癸拷锟斤拷锟斤拷战锟斤拷使锟斤拷Spring Boot应锟矫具憋拷锟斤拷锟矫碉拷锟斤拷展锟皆猴拷锟斤拷应锟皆★拷

锟斤拷锟斤拷锟斤拷锟斤拷录锟斤拷锟揭的革拷锟剿诧拷锟酵ｏ拷锟斤拷农Academy锟侥诧拷锟酵ｏ拷专注锟斤拷锟斤拷Java锟斤拷锟斤拷锟缴伙拷锟斤拷锟斤拷锟斤拷Java锟斤拷锟斤拷锟斤拷Spring Boot锟斤拷Spring Cloud锟斤拷Mysql锟斤拷Redis锟斤拷Elasticsearch锟斤拷锟叫硷拷锟斤拷锟斤拷芄锟斤拷锟狡★拷锟斤拷锟斤拷锟解、锟斤拷锟斤拷员锟斤拷锟皆碉拷

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