CODEWITHSUNDEEP
jsonspringapirest
user2239655
user2239655

Reputation: 840

Spring 3.2 Jackson 2.2 REST API

I am beginning with REST techniologies, and I choose Spring 3.2 and Jackson 2.2 . I have small question. I created REST API and it looks like this:

@Controller
public class WorkersController {

@Autowired
public DatabaseService dbService;

@ResponseBody
@RequestMapping(value="/workers", method = RequestMethod.GET, produces = "application/json")
public ArrayList<Worker> getAllWorkersFromDatabase() {
}

@ResponseBody
@RequestMapping(value="/workers/new", method = RequestMethod.POST, produces = "application/json", consumes="application/json")
public String saveWorker(@RequestBody final WorkerDTO workerDto) {
}

@ResponseBody
@RequestMapping(value="/workers/{workerid}", method = RequestMethod.GET, produces = "application/json")
public Worker getWOrkerByDatabaseId(@PathVariable Integer workerid) {
}

@ResponseBody
@RequestMapping(value="/workers/{workerid}/edit", method = RequestMethod.PUT, produces = "application/json")
public String editWorker(@PathVariable Integer workerid, @RequestBody Worker worker) {
}
}

When I make HTTP GET all is ok but I have problem with POST. When I am calling saveWorker() method I get:

The server refused this request because the request entity is in a format not  supported by the requested resource for the requested method

I imported required libraries:

 <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>${jackson.version}</version>
    </dependency>

I think the main problem is in configuration files and @RequestBody cant map JSON to DTO. It is my Configuration:

@Configuration
@ComponentScan(basePackages = "org.schedule.service")
@EnableWebMvc
@Import(DatabaseSpringConfig.class)
public class ServiceSpringConfig extends WebMvcConfigurationSupport{

@Override
protected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    MappingJackson2HttpMessageConverter jsonConverter = new MappingJackson2HttpMessageConverter();
    List<MediaType> jsonTypes = new ArrayList<>(jsonConverter.getSupportedMediaTypes());
    jsonTypes.add(MediaType.TEXT_PLAIN);
    jsonTypes.add(MediaType.APPLICATION_JSON);
    jsonConverter.setSupportedMediaTypes(jsonTypes);
    converters.add(jsonConverter);
}

}

My DTO:

public class WorkerDTO implements Serializable {

private static final long serialVersionUID = 1L;

public String name;
public String surname;

public WorkerDTO() {
}
}

Json:

{
"name": "asdssss",
"surname": "asdssssss"
}

And http call:

localhost:8080/Schedule-service/workers/new?Content-type=application/json

Thanks for all replies.

Upvotes: 2

Views: 927

Answers (1)

Sotirios Delimanolis
Sotirios Delimanolis

Reputation: 279880

The request 

localhost:8080/Schedule-service/workers/new?Content-type=application/json

has a request parameter with name Content-Type and value application/json.

HttpMessageConverter classes, and MappingJackson2HttpMessageConverter in particular, don't look for request parameters, they look for headers.

You need to specify a Content-Type header for your request.

Upvotes: 4

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