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Когда я вызываю метод llaveCom.getName (), я всегда получаю значение null, я не знаю, почему

Код компонента»

 @Component
@ConfigurationProperties("app")
public class LlaveCompo {

private String name;
private String llave;

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getLlave() {
    return llave;
}

public void setLlave(String llave) {
    this.llave = llave;
}
}
 

Значения, которые я хочу получить
application.properties

 app.name=hola

app.llave=fE3tTFvoRd#PYDLoXdIq4ytJJP#ym%Mw
 

Сервис от я внедряю компонент:

 @Autowired
private LlaveCompo llaveCom;

private static final String AES = "AES";
@Value("app.llave")
private  String secret = "fE3tTFvoRd#PYDLoXdIq4ytJJP#ym%Mw" ;
private final Key key;
private final Cipher cipher;

public CryptoService() throws Exception{
    System.out.println(llaveCom.getName());
    System.out.println("llave: " llaveC);
    key = new SecretKeySpec(secret.getBytes(), AES);
    cipher = Cipher.getInstance(AES);
}
 

журналы, описывающие ошибки:

 org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServic': Unsatisfied dependency expressed through field 'cryptoService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cryptoService' defined in file [C:UsersECE-LDDocumentsNetBeansProjectsPruebaCripto2targetclassescomexamplePruebaCriptoservicesCryptoService.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.example.PruebaCripto.services.CryptoService]: Constructor threw exception; nested exception is java.lang.NullPointerException

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServic': Unsatisfied dependency expressed through field 'cryptoService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cryptoService' defined in file [C:UsersECE-LDDocumentsNetBeansProjectsPruebaCripto2targetclassescomexamplePruebaCriptoservicesCryptoService.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.example.PruebaCripto.services.CryptoService]: Constructor threw exception; nested exception is java.lang.NullPointerException
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cryptoService' defined in file [C:UsersECE-LDDocumentsNetBeansProjectsPruebaCripto2targetclassescomexamplePruebaCriptoservicesCryptoService.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.example.PruebaCripto.services.CryptoService]: Constructor threw exception; nested exception is java.lang.NullPointerException
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.example.PruebaCripto.services.CryptoService]: Constructor threw exception; nested exception is java.lang.NullPointerException
Caused by: java.lang.NullPointerException: null
 

Вы должны использовать инъекцию конструктора. И поскольку у вас уже есть Llaveompo, вам не нужно иметь @Value для секрета.

 private final LlaveCompo llaveCom;

private static final String AES = "AES";
private final Key key;
private final Cipher cipher;

public CryptoService(LlaveCompo llaveCom) throws Exception{
    this.llaveCom = llaveCom;
    System.out.println(llaveCom.getName());
    System.out.println("llave: " llaveC);

    key = new SecretKeySpec(llaveCom.getLlave().getBytes(), AES);
    cipher = Cipher.getInstance(AES);
}