Java: How to change mongodb port configured with spring boot yml

Question

With java I can do the following to change the tomcat port:

java -jar spring-5.jar --server.port=8083

That works for changing the default 8080 port in my yml file but what if I also want to change the default mongo db port:

spring:
  data:
    mongodb:
      database: test
      host: localhost
      port: 27017

can I do:

java -jar spring-5.jar --mongodb.port=27018

Will the above work? I could not find any docs on how to change the mongodb port in a spring boot project once compiled into a JAR.

Answer 1

像这样做，

--spring.data.mongodb.port=27018

Answer 2

您可以尝试以下方法：

java -jar spring-5.jar --spring.data.mongodb.port=27018

Answer 3

There're many ways to overwrite the configure in the jar package. Here are some common ways, try one of them:

1. application.properties on your work directory.
2. OS environment variables like SPRING_DATA_MONGODB_PORT=27018
3. Java System properties like java -Dspring.data.mongodb.port=27018 -jar the.jar
4. Spring Boot's command line arguments like jar -jar the.jar --spring.data.mongodb.port=27018 . Don't forget to pass the args from main() to SpringApplication.run .

See https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html for more information