疑問
SpringBoot項目，使用java -jar命令啓動時，配置文件的優先級如何？配置文件覆蓋方式是整個文件還是單個屬性值？
結果
文件類型
application[-profile].application
ymal格式應該也是一樣，不過沒有測試
覆蓋方式
屬性值覆蓋
優先級
當前目錄執行
jar包所在目錄：D:\springboot，啓動命令：D:\springboot>java -jar xxx，優先級如下：
啓動命令指定配置 > file:/config > file:/ > classpath:/config > classpath:/
非當前目錄執行
jar包所在目錄：D:\springboot，啓動命令：D:>java -jar xxx，優先級如下：
啓動命令指定配置 > 當前目錄:/config > 當前目錄:/ > classpath:/config > classpath:/
代碼測試
classpath:/
application.properties
spring.profiles.active=dev
server.port=8080
application-dev.properties
server.port=8081
value=classpath-value
運行效果
- 端口：8081
- value：classpath-value
D:\springboot>java -jar migrator-1.0.0.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.5.RELEASE)
2020-03-15 16:46:31.812 INFO 9444 --- [ main] org.fjad.study.MigratorApplication : Starting MigratorApplication v1.0.0 on HGYdePC with PID 9444 (D:\springboot\migrator-1.0.0.jar started by guoyu.huang in D:\springboot)
2020-03-15 16:46:31.815 INFO 9444 --- [ main] org.fjad.study.MigratorApplication : The following profiles are active: dev
2020-03-15 16:46:33.149 INFO 9444 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8081 (http)
2020-03-15 16:46:33.178 INFO 9444 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-15 16:46:33.179 INFO 9444 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.19]
2020-03-15 16:46:33.278 INFO 9444 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-15 16:46:33.279 INFO 9444 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1419 ms
2020-03-15 16:46:33.467 INFO 9444 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-03-15 16:46:33.647 INFO 9444 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8081 (http) with context path ''
2020-03-15 16:46:33.650 INFO 9444 --- [ main] org.fjad.study.MigratorApplication : Started MigratorApplication in 2.207 seconds (JVM running for 2.541)
classpath-value
增加classpath:/config/application-dev.properties
jar包內的目錄關係：
..\config\application-dev.properties
..\application-dev.properties
…\config\application-dev.properties
value=classpath-config-value
運行效果
- 端口：8081
- value：classpath-config-value
D:\springboot>java -jar migrator-1.0.0.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.5.RELEASE)
2020-03-15 16:49:34.212 INFO 100 --- [ main] org.fjad.study.MigratorApplication : Starting MigratorApplication v1.0.0 on HGYdePC with PID 100 (D:\springboot\migrator-1.0.0.jar started by guoyu.huang in D:\springboot)
2020-03-15 16:49:34.214 INFO 100 --- [ main] org.fjad.study.MigratorApplication : The following profiles are active: dev
2020-03-15 16:49:35.595 INFO 100 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8081 (http)
2020-03-15 16:49:35.622 INFO 100 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-15 16:49:35.623 INFO 100 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.19]
2020-03-15 16:49:35.721 INFO 100 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-15 16:49:35.721 INFO 100 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1456 ms
2020-03-15 16:49:35.955 INFO 100 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-03-15 16:49:36.143 INFO 100 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8081 (http) with context path ''
2020-03-15 16:49:36.147 INFO 100 --- [ main] org.fjad.study.MigratorApplication : Started MigratorApplication in 2.285 seconds (JVM running for 2.601)
classpath-config-value
增加file:/application-dev.properties
目錄關係：
D:\springboot\migrator-1.0.0.jar
D:\springboot\application-dev.properties
application-dev.properties
server.port=8082
value=file-value
運行效果
- 端口：8082
- value：file-dev
D:\springboot>java -jar migrator-1.0.0.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.5.RELEASE)
2020-03-15 16:51:01.316 INFO 11168 --- [ main] org.fjad.study.MigratorApplication : Starting MigratorApplication v1.0.0 on HGYdePC with PID 11168 (D:\springboot\migrator-1.0.0.jar started by guoyu.huang in D:\springboot)
2020-03-15 16:51:01.319 INFO 11168 --- [ main] org.fjad.study.MigratorApplication : The following profiles are active: dev
2020-03-15 16:51:02.649 INFO 11168 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8082 (http)
2020-03-15 16:51:02.677 INFO 11168 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-15 16:51:02.678 INFO 11168 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.19]
2020-03-15 16:51:02.771 INFO 11168 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-15 16:51:02.772 INFO 11168 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1408 ms
2020-03-15 16:51:02.971 INFO 11168 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-03-15 16:51:03.140 INFO 11168 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8082 (http) with context path ''
2020-03-15 16:51:03.143 INFO 11168 --- [ main] org.fjad.study.MigratorApplication : Started MigratorApplication in 2.176 seconds (JVM running for 2.495)
file-value
增加file:/config/application-dev.properties
目錄關係：
D:\springboot\migrator-1.0.0.jar
D:\springboot\application-dev.properties
D:\springboot\config\application-dev.properties
D:\springboot\config\application-dev.properties
server.port=8083
運行效果
- 端口：8083
- value：file-value
D:\springboot>java -jar migrator-1.0.0.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.5.RELEASE)
2020-03-15 16:54:47.296 INFO 8984 --- [ main] org.fjad.study.MigratorApplication : Starting MigratorApplication v1.0.0 on HGYdePC with PID 8984 (D:\springboot\migrator-1.0.0.jar started by guoyu.huang in D:\springboot)
2020-03-15 16:54:47.298 INFO 8984 --- [ main] org.fjad.study.MigratorApplication : The following profiles are active: dev
2020-03-15 16:54:48.574 INFO 8984 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8083 (http)
2020-03-15 16:54:48.597 INFO 8984 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-15 16:54:48.598 INFO 8984 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.19]
2020-03-15 16:54:48.687 INFO 8984 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-15 16:54:48.687 INFO 8984 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1346 ms
2020-03-15 16:54:48.892 INFO 8984 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-03-15 16:54:49.053 INFO 8984 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8083 (http) with context path ''
2020-03-15 16:54:49.056 INFO 8984 --- [ main] org.fjad.study.MigratorApplication : Started MigratorApplication in 2.129 seconds (JVM running for 2.442)
file-value
啓動命令增加指定配置
啓動命令：java -Dspring.config.location=my-application.properties -jar migrator-1.0.0.jar
my-application.properties
server.port=8084
value=my-value
運行效果
- 端口：8084
- value：my-value
D:\springboot>java -Dspring.config.location=my-application.properties -jar migrator-1.0.0.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.5.RELEASE)
2020-03-15 17:09:03.525 INFO 20384 --- [ main] org.fjad.study.MigratorApplication : Starting MigratorApplication v1.0.0 on HGYdePC with PID 20384 (D:\springboot\migrator-1.0.0.jar started by guoyu.huang in D:\springboot)
2020-03-15 17:09:03.529 INFO 20384 --- [ main] org.fjad.study.MigratorApplication : No active profile set, falling back to default profiles: default
2020-03-15 17:09:04.844 INFO 20384 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8084 (http)
2020-03-15 17:09:04.874 INFO 20384 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-15 17:09:04.874 INFO 20384 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.19]
2020-03-15 17:09:04.969 INFO 20384 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-15 17:09:04.969 INFO 20384 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1394 ms
2020-03-15 17:09:05.171 INFO 20384 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-03-15 17:09:05.342 INFO 20384 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8084 (http) with context path ''
2020-03-15 17:09:05.345 INFO 20384 --- [ main] org.fjad.study.MigratorApplication : Started MigratorApplication in 2.137 seconds (JVM running for 2.453)
my-value
非當前目錄執行
當前路徑爲D:\，啓動命令：java -jar springboot/migrator-1.0.0.jar
運行效果
- 端口：8081
- value：classpath-config-value
D:\>java -jar springboot/migrator-1.0.0.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.5.RELEASE)
2020-03-15 17:16:39.301 INFO 17180 --- [ main] org.fjad.study.MigratorApplication : Starting MigratorApplication v1.0.0 on HGYdePC with PID 17180 (D:\springboot\migrator-1.0.0.jar started by guoyu.huang in D:\)
2020-03-15 17:16:39.303 INFO 17180 --- [ main] org.fjad.study.MigratorApplication : The following profiles are active: dev
2020-03-15 17:16:40.609 INFO 17180 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8081 (http)
2020-03-15 17:16:40.639 INFO 17180 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-15 17:16:40.640 INFO 17180 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.19]
2020-03-15 17:16:40.728 INFO 17180 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-15 17:16:40.728 INFO 17180 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1380 ms
2020-03-15 17:16:40.937 INFO 17180 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-03-15 17:16:41.113 INFO 17180 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8081 (http) with context path ''
2020-03-15 17:16:41.116 INFO 17180 --- [ main] org.fjad.study.MigratorApplication : Started MigratorApplication in 2.158 seconds (JVM running for 2.475)
classpath-config-value
非當前目錄執行，執行目錄下有配置文件
當前路徑爲D:\，啓動命令：java -jar springboot/migrator-1.0.0.jar
D:\application-dev.properties
server.port=8085
value=current-file-value
運行效果
- 端口：8085
- value：current-file-value
D:\>java -jar springboot/migrator-1.0.0.jar
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.5.RELEASE)
2020-03-15 17:33:05.250 INFO 11760 --- [ main] org.fjad.study.MigratorApplication : Starting MigratorApplication v1.0.0 on HGYdePC with PID 11760 (D:\springboot\migrator-1.0.0.jar started by guoyu.huang in D:\)
2020-03-15 17:33:05.253 INFO 11760 --- [ main] org.fjad.study.MigratorApplication : The following profiles are active: dev
2020-03-15 17:33:06.529 INFO 11760 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8085 (http)
2020-03-15 17:33:06.557 INFO 11760 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-03-15 17:33:06.558 INFO 11760 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.19]
2020-03-15 17:33:06.640 INFO 11760 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-03-15 17:33:06.640 INFO 11760 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1344 ms
2020-03-15 17:33:06.840 INFO 11760 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-03-15 17:33:07.014 INFO 11760 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8085 (http) with context path ''
2020-03-15 17:33:07.017 INFO 11760 --- [ main] org.fjad.study.MigratorApplication : Started MigratorApplication in 2.122 seconds (JVM running for 2.434)
current-file-value
代碼解析
// TODO