Spring – ${} is not working in @Value
A simple Spring @PropertySource
example to read a properties file.
db.properties
db.driver=oracle.jdbc.driver.OracleDriver
AppConfig.java
@Configuration
@PropertySource("classpath:db.properties")
public class AppConfig {
@Value("${db.driver}")
private String driver;
But the property placeholder ${}
is unable to resolve in @Value
, if print out the driver
variable, it will display string ${db.driver}
directly, instead of “oracle.jdbc.driver.OracleDriver”.
Solution
To resolve ${}
in Spring @Value
, you need to declare a STATIC PropertySourcesPlaceholderConfigurer
bean manually. For example :
AppConfig.java
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
@Configuration
@PropertySource("classpath:db.properties")
public class AppConfig {
@Value("${db.driver}")
private String driver;
@Bean
public static PropertySourcesPlaceholderConfigurer propertyConfigInDev() {
return new PropertySourcesPlaceholderConfigurer();
}
}
For XML configuration, Spring will help you to register PropertySourcesPlaceholderConfigurer
automatically.
<util:properties location="classpath:db.properties"/>
Note
Read this Spring JIRA SPR-8539
Read this Spring JIRA SPR-8539
Note
You may interest at this Spring @PropertySource example
You may interest at this Spring @PropertySource example
It does not resolve a value if it’s declared as a field, but works if I pass it as a method parameter with @Value annotation. Any idea why this behavior could be happening?
Thanks for helping my track this down, BUT, see discussion at https://stackoverflow.com/questions/32715190/spring-util-properties-in-app-context-xml-file — you cannot use util.properties. Must use the instead
THANK YOU!!! THIS ARTICLE REALLY SOVLE MY PROBLEM!!!
Thanks a lot… this just saved me
Thank you very much Sir,
saved my day.
I suggest the xml method?ref?http://blog.csdn.net/duqi_2009/article/details/48440427