CODEWITHSUNDEEP
javajsonajaxspring-mvcjackson
ADR
ADR

Reputation: 25

400 Bad Request on ajax post with @RequestBody using Jackson

I'm getting 400 Bad Request on Ajax request when trying to map my JSON to a Java object in spring MVC controller. I have checked most of the relevant questions in the topic but still couldn't make it work

Ajax call and JSON:

$.ajax({
    type: "POST",
    url: "vocabulary/createVocabulary",
    contentType : 'application/json; charset=utf-8',
    data: {"vocabularyName" : "a",
    "vocabularyDescription" : "b"},

My controller:

@Service
@Controller
@RequestMapping(path="vocabulary")
public class VocabularyController {

@RequestMapping (path = "createVocabulary", method = RequestMethod.POST)
@ResponseBody String createVocabulary(@RequestBody VocabularyDTO vocabularyDTO){
    return "Success";
  }
}

My Java object:

public class VocabularyDTO {

private String vocabularyName;
private String vocabularyDescription;

public VocabularyDTO(){};

public String getVocabularyName() {
    return vocabularyName;
}

public void setVocabularyName(String vocabularyName) {
    this.vocabularyName = vocabularyName;
}

public String getVocabularyDescription() {
    return vocabularyDescription;
}

public void setVocabularyDescription(String vocabularyDescription) {
    this.vocabularyDescription = vocabularyDescription;
}
}

I use Spring 4.2.5 and Jackson:

...

def springVersion = "4.2.5.RELEASE"

repositories {
mavenCentral()
jcenter()
}

dependencies {

compile group: "org.springframework", name: "spring-core", version: "$springVersion"
compile group: "org.springframework", name: "spring-beans", version: "$springVersion"
compile group: "org.springframework", name: "spring-context", version: "$springVersion"
compile group: "org.springframework", name: "spring-aop", version: "$springVersion"
compile group: "org.springframework", name: "spring-web", version: "$springVersion"
compile group: "org.springframework", name: "spring-webmvc", version: "$springVersion"
compile group: "org.springframework.data", name: "spring-data-jpa", version: "1.9.4.RELEASE"

compile group: "com.fasterxml.jackson.core", name: "jackson-databind", version: "2.6.5"
compile group: "com.fasterxml.jackson.core", name: "jackson-core", version: "2.6.5"
compile group: "com.fasterxml.jackson.core", name: "jackson-annotations", version: "2.6.5"

...
}

The error I'm getting:

HTTP ERROR 400 Problem accessing /ux/vocabulary/createVocabulary. Reason: BAD_REQUEST

Additionally, if I remove the '@RequestBody'annotation from my controller I get the following server response:

Failed to instantiate [com.attila.vocabulary.ux.spring.vocabulary.DTO.VocabularyDTO]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.attila.vocabulary.ux.spring.vocabulary.DTO.VocabularyDTO.()

Does anyone have any idea what could be wrong? Thanks!

UPDATE: The option without '@RequestBody' annotation is actually working now (it was a silly mistake of mine why it didn't before) - i.e. not throwing error, however without the values being passed to the object.

I was hoping it would fix the annotation as well but I still get the 400 error that way.

Upvotes: 2

Views: 4635

Answers (1)

alfcope
alfcope

Reputation: 2427

Your code is not working when using @RequestBody because your ajax request is not sending a json object. You need to serialise the JavaScript object before sending it, using JSON.stringify(). And why are you using @Service at your controller? Try with:

$.ajax({
    type: "POST",
    url: "vocabulary/createVocabulary",
    contentType : 'application/json; charset=utf-8',
    data: JSON.stringify({"vocabularyName" : "a",
    "vocabularyDescription" : "b"}),


@Controller
@RequestMapping(path="vocabulary")
public class VocabularyController {

@RequestMapping (path = "createVocabulary", method = RequestMethod.POST, consumes=MediaType.APPLICATION_JSON_VALUE}
@ResponseBody String createVocabulary(@RequestBody VocabularyDTO vocabularyDTO){
    return "Success";
  }
}

Upvotes: 2

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