Spring @Value is null

Question

Like the Title says, my @Value doesn't passes a value

I've written the following in my application.properties:

project:
  image:
    path= "C:\\Users\\...."

I've got a Class Configuration

@Component
public class Configuration{
    @Value("${project.image.path}")
    public static String ImagePath;
}

In my Other class called Image I want to convert the String path to a File, so that I can work with this value later:

public class Image{
    static File Directory= new File (Configuration.ImagePath);
}

The Problem is, when I use my programm and one of the Methods is used, where the variable Directory is used(which are all written in the Image class), I get a NullPointerException: null and strangely when I refresh the site after the error occurs one time, the error now says NoClassDefFoundError: Could not initialize class com.Project.Image

I think it should be `project.image.path= "C:\\Users\\..` remove colon and set `.` — soorapadman, Sep 29 '17 at 10:07
Have you autowired in Image class `@Autowire Configuration?` — soorapadman, Sep 29 '17 at 10:15

score 8 · Accepted Answer · answered Sep 29 '17 at 10:15

8

You can't use @Value on static properties. Either remove the static keyword or make a non static setter for your static variable:

@Component
public class Configuration {

    private static String imagePath;

    @Value("${project.image.path}")
    public void setImagePath(String value) {
        this.imagePath = value;
    }
}

answered Sep 29 '17 at 10:15

Plog

9,164
5
41
66

Thank You! This worked for me! – DxAntonxD Sep 29 '17 at 10:25

Spring @Value is null

1 Answers1