CODEWITHSUNDEEP
spring-bootapplication.properties
vijju
vijju

Reputation: 35

Spring boot not reading properties

In the main controller, I am able to read the properties. If I have a properties class and try to access these or inject the below values in every class that requires the properties I am unable to do so. what is missing? I do not want to pass around variables to all the functions from the main controller.

@SpringBootApplication
@Configuration
public class ApplicationProperties {
    @Autowired
    @Value("${file.location}")
    private String fileLocation;
    
    @Value("${file.name}")
    private String fileName;
    
    /**
     * @return the fileLocation
     */
    @RequestMapping(value="/")
    public String getFileLocation() {
        return fileLocation;
    }
    /**
     * @return the fileName
     */
    @RequestMapping(value="file")
    public String getFileName() {
        return fileName;
    }
}

Upvotes: 0

Views: 2369

Answers (2)

Woodchuck
Woodchuck

Reputation: 4414

The simplest approach may be:

import org.springframework.stereotype.*;
import org.springframework.beans.factory.annotation.*;

@Component
public class MyBean {

    @Value("${file.location}")
    private String fileLocation;

    @Value("${file.name}")
    private String fileName;

    // ...

}

Spring will load properties from application.properties by default.

Or you can use specify a different file name in a configuration class using @PropertySource:

package com.my.config;

//.. spring imports

@Configuration
@ComponentScan(basePackages = { "com.my.config" })
@PropertySource("classpath:config.properties")
public class MyConfigClass {

    @Value("${project.name:Default Project Name}")
    private String projectName;

    // giving fileName a default value in case the one specified doesn't exist
    @Value("${file.name:defaultfile.txt}")
    private String fileName;

    //...
}

See info on Spring Boot externalized configuration here.

Upvotes: 0

Bassem Adas
Bassem Adas

Reputation: 221

First of all you don't need the annotation @SpringBootApplication unless the class has main method.

Secondly, you don't need the annotation @Autowired on fileLocation because @Value is sufficient.

Finally, you need the annotation @RestController because it's a REST api.

Now:

Either add main method to you class and omit @configuration otherwise you need to create a main class with the annotation @SpringBootApplication and keep @RestController.

Upvotes: 1

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