从命令行覆盖application.properties文件中的值

Question

I have apllication.properties files in java web application which contains these properties.

spring.datasource.driverClassName=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:19095/test
spring.datasource.username=test
spring.datasource.password=test123

But I want to override these properties (except driverClassName) while starting tomcat server. I'm trying to set these variables from command line, but it's not working.

tomcat version : 7.0.63

Answer 1

Why don't you use a property placeholder with config directory specified by a system parameter:

<context:property-placeholder location="file:${configLocation}/database.properties:defaultDatabase.properties" />

Then start the tomcat with:

-DconfigLocation=/opt/config

see http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/context/annotation/PropertySource.html and also Loading property file from system properties with default path in Spring context