CODEWITHSUNDEEP
javaspringspring-bootspring-annotations
Jun Park
Jun Park

Reputation: 538

Retrieve application.properties values via @Value in SpringBoot

I am trying to pull data from application.properties file in Spring Boot

application.properties

host=localhost:8080
accountNumber=1234567890

TestController.java

@RestController
public class TestController {

private Logger logger = LoggerFactory.getLogger(TestController.class);

@Autowired
private TestService testServiceImpl;

@Value("${host}")
private String host;

@RequestMapping("/test")
public String test() {
    testServiceImpl = new TestService();
    return testServiceImpl.getValue();
}

TestServiceImpl.java

@Service
public class TestServiceImpl implements TestService{

    @Value("${accountNumber}")
    public String value;

    public String getValue(){
    return value;
}

When I do a REST call to localhost:8080/test, I get a null value.

TestServiceImpl is instantiated however, @Value does not seem to work.

Am I missing anything?

SOLUTION:
All I had to do was to remove the line testServiceImpl = new TestService();
I am assuming it was doing that because new TestService() was overwriting the autowired instance of TestService

Upvotes: 1

Views: 2475

Answers (2)

Jun Park
Jun Park

Reputation: 538

The solution I found was very simple.

All I had to do was to remove the line testServiceImpl = new TestService();

I am assumed it was doing that because new TestService() was overwriting the autowired instance of TestService.

Thank you harshavmb for verifying my solution.

Hope this helps many new Spring-ers :)

Upvotes: 0

VNT
VNT

Reputation: 974

To update :

Spring's DI achieved via @Autowired annotation.It creates the object for us.

@Autowired
private TestService testServiceImpl;
.
.
.

@RequestMapping("/test")
public String test() {
    // testServiceImpl = new TestService(); // make comment this line 
    return testServiceImpl.getValue();
}

Upvotes: 3

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