After building jar file of Spring Application. It is showing file not found exception

Question

java.io.FileNotFoundException: class path resource [] cannot be resolved to absolute file path because it does not reside in the file system: jar:file:/C:/Users/msi/Desktop/spring-boot-tapcell-aws-exe.jar!/BOOT-INF/classes!/

In the spring boot Application Run It works fine. But After creating jar file when I run this it shows file not found exception

@Component public class FileUploadHealper {

public final String UPLOAD_DIR = new ClassPathResource("/static/").getFile().getAbsolutePath();
        //new ClassPathResource("static").getFile().getAbsolutePath();

public FileUploadHealper( ) throws IOException{
    
}
@Getter
@Setter
private long currDatefile;

public Boolean uploadProFile(MultipartFile multipartFile,String roll) {
    initFewDirectory();
    createStudentRollDirectory(roll);
    Date date = new Date();
    long currDate = date.getTime();
    boolean f=false;

    try {
        System.out.println("hello  sir");
        Files.copy(multipartFile.getInputStream(),Paths.get(UPLOAD_DIR+"/image/students/"+roll+"/"+File.separator+String.valueOf(currDate)+multipartFile.getOriginalFilename()) , StandardCopyOption.REPLACE_EXISTING);
        f=true;
        setCurrDatefile(currDate);
        System.out.println(new ClassPathResource("/static/image/").getFile().getAbsolutePath());
    } catch (Exception e) {
        e.printStackTrace();
    }
    
    
    return f;
    
}
public Boolean uploadNotice(MultipartFile multipartFile) {
    initFewDirectory();
    Date date = new Date();
    long currDate = date.getTime();
    boolean f=false;

    try {
        Files.copy(multipartFile.getInputStream(),Paths.get(UPLOAD_DIR+"/image/notice/"+File.separator+String.valueOf(currDate)+multipartFile.getOriginalFilename()) , StandardCopyOption.REPLACE_EXISTING);
        f=true;
        setCurrDatefile(currDate);
        System.out.println(new ClassPathResource("/static/image/notice/").getFile().getAbsolutePath());
    } catch (Exception e) {
        e.printStackTrace();
    }
    
    
    return f;
    
}

private void createStudentRollDirectory(String roll) {
    String path = UPLOAD_DIR+"/students/"+roll;
    File pathAsFile = new File(path);

    if (!Files.exists(Paths.get(path))) {
        System.out.println("success");
        pathAsFile.mkdir();
    }
}

public  void initFewDirectory() {
    System.out.println("this is test");
    String staticpathString = null;
    try {
        staticpathString = new ClassPathResource("/static/").getFile().getAbsolutePath();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    String path[] = {staticpathString,UPLOAD_DIR,UPLOAD_DIR +"/students/",UPLOAD_DIR+"/notice/"};
    for(String x : path) {
    File pathAsFile = new File(x);

    if (!Files.exists(Paths.get(x))) {
        System.out.println("success");
        pathAsFile.mkdir();
    }
    }
}

}