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Spring - Adding user properties by using @PropertySource

[Last Updated: Jun 11, 2021]

In this tutorial we will see how to add user properties to Spring Environment using @PropertySource.

@PropertySource annotation is used on @Configuration classes.

Definition of PropertySource

(Version: spring-framework 5.3.7)
package org.springframework.context.annotation;
   ........
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Repeatable(PropertySources.class)
public @interface PropertySource {
    String name() default ""; 1
    String[] value(); 2
    boolean ignoreResourceNotFound() default false; 3
    String encoding() default ""; 4
    Class<? extends PropertySourceFactory> factory() default
            PropertySourceFactory.class; 5
}
1Indicates the name of this property source. If omitted, a name will be generated based on the underlying resource.
2Indicates the resource location(s) of the properties file to be loaded.
Examples: "classpath:/com/logicbig/app.properties" or "file:/path/to/file.xml".
Wildcards (e.g. **/*.properties) are not permitted.
${...} placeholders will be resolved against any/all property sources already registered with the Environment.
3Indicates if a failure to find the property resource should be ignored. Default is false. Should be set to true if the properties file is completely optional.
4A specific character encoding for the given resources, e.g. "UTF-8"
5Specifies a custom PropertySourceFactory (Strategy interface for creating resource-based PropertySource wrappers). By default DefaultPropertySourceFactory is used.

Example

User property file

src/main/resources/app.properties

contact-person=Monica J. Pace

Using @PropertySource

package com.logicbig.example;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.ConfigurableEnvironment;

@Configuration
@PropertySource("classpath:app.properties")
public class UserPropertySourceExample {
  public static void main(String[] args) {
      AnnotationConfigApplicationContext context =
              new AnnotationConfigApplicationContext(UserPropertySourceExample.class);
      ConfigurableEnvironment env = context.getEnvironment();
      System.out.println("property sources:" + env.getPropertySources());
      String contactPerson = env.getProperty("contact-person");
      System.out.println("contact-person: " + contactPerson);
  }
}

Output

property sources:[PropertiesPropertySource {name='systemProperties'}, SystemEnvironmentPropertySource {name='systemEnvironment'}, ResourcePropertySource {name='class path resource [app.properties]'}]
contact-person: Monica J. Pace

Example Project

Dependencies and Technologies Used:

  • spring-context 5.3.8: Spring Context. Version Compatibility: 3.2.3.RELEASE - 5.3.8 Version List
    ×

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    Versions in green have been tested.

  • JDK 8
  • Maven 3.8.1

@PropertySource annotation example Select All Download
  • spring-property-source-annotation
    • src
      • main
        • java
          • com
            • logicbig
              • example
                • UserPropertySourceExample.java
          • resources

    See Also