Reputation: 63
I have a Spring RestController which I am starting in locahost:8080. When I send a request to it (localhost:8080/people) I get a response in XML format. How can I make it JSON? When I send the request using Opera web browser I get XML format, but when I use the terminal( I use Mac) the answer to the request is Json. How can I make the answer in the browser be a JSON format.
Controller
package People;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.hateoas.Resource;
import org.springframework.hateoas.Resources;
import org.springframework.web.bind.annotation.*;
import static org.springframework.hateoas.mvc.ControllerLinkBuilder.linkTo;
import static org.springframework.hateoas.mvc.ControllerLinkBuilder.methodOn;
@RestController
@RequestMapping("people")
public class PersonController {
private final PersonRepository repository;
PersonController(PersonRepository repository){
this.repository = repository;
}
@GetMapping
public Resources<Resource<Person>> all(){
List<Resource<Person>> persons = repository.findAll().stream()
.map(employee -> new Resource<>(employee,
linkTo(methodOn(PersonController.class).one(employee.getId())).withSelfRel(),
linkTo(methodOn(PersonController.class).all()).withRel("Persons")))
.collect(Collectors.toList());
return new Resources<>(persons,
linkTo(methodOn(PersonController.class).all()).withSelfRel());
}
@PostMapping("")
public Person newEmployee(@RequestBody Person newEmployee) {
return repository.save(newEmployee);
}
@GetMapping("{id}")
public Resource<Person> one(@PathVariable Long id) {
Person Person = repository.findById(id)
.orElseThrow(() -> new PersonNotFoundException(id));
return new Resource<>(Person,
linkTo(methodOn(PersonController.class).one(id)).withSelfRel(),
linkTo(methodOn(PersonController.class).all()).withRel("Persons"));
}
@PutMapping("{id}")
public Person replacePerson(@RequestBody Person newPerson,@PathVariable Long id){
return repository.findById(id)
.map(Person -> {
Person.setName(newPerson.getName());
Person.setLastName(newPerson.getLastName());
return repository.save(Person);
}).orElseGet(() -> {
newPerson.setId(id);
return repository.save(newPerson);
});
}
@DeleteMapping("{id}")
void deletePerson(@PathVariable Long id) {
repository.deleteById(id);
}
}
This is how the response looks like
<html>
<body>
<h1>Whitelabel Error Page</h1>
<p>
This application has no explicit mapping for /error, so you are seeing this as a fallback.
</p>
<div id="created">Mon Oct 29 22:41:51 MSK 2018</div>
<div>
There was an unexpected error (type=Internal Server Error, status=500).
</div>
<div>
Could not marshal [Resources { content: [Resource { content: Person(id=1, Name=Paul, LastName=Walker), links: [<http://localhost:8080/people/1>;rel="self", <http://localhost:8080/people>;rel="Persons"] }, Resource { content: Person(id=2, Name=Stan, LastName=Smith), links: [<http://localhost:8080/people/2>;rel="self", <http://localhost:8080/people>;rel="Persons"] }], links: [<http://localhost:8080/people>;rel="self"] }]: null; nested exception is javax.xml.bind.MarshalException - with linked exception: [com.sun.istack.internal.SAXException2: unable to marshal type "org.springframework.hateoas.Resource" as an element because it is not known to this context.]
</div>
</body>
</html>
Console log
2018-10-29 23:57:26.747 INFO 21281 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-10-29 23:57:26.747 INFO 21281 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started
2018-10-29 23:57:26.767 INFO 21281 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 20 ms
2018-10-29 23:57:26.985 WARN 21281 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.http.converter.HttpMessageNotWritableException: Could not marshal [Resource { content: Person(id=1, Name=Paul, LastName=Walker), links: [<http://localhost:8080/people/1>;rel="self", <http://localhost:8080/people>;rel="Persons"] }]: null; nested exception is javax.xml.bind.MarshalException
- with linked exception:
[com.sun.istack.internal.SAXException2: class People.Person nor any of its super class is known to this context.
javax.xml.bind.JAXBException: class People.Person nor any of its super class is known to this context.]]
Upvotes: 2
Views: 412
Reputation: 798
Please try to add producer to your get method as below
@GetMapping(path = "/{id}", produces = MediaType.APPLICATION_JSON_VALUE)
Upvotes: 2