RequestBody + JSON

Question

I have problem with convert JSON to Java class.

Controller

@RequestMapping(value = "/{username}/add", method = POST)
 public void add(@RequestBody NoteModel note) {
 System.out.println(note.getTitle());
 }

JSON

{
 title : "Title",
 text : "Text"
}

NoteModel

public class NoteModel {
 private String title;
 private String text;
 public String getTitle() {
 return title;
 }
 public void setTitle(String title) {
 this.title = title;
 }
 public String getText() {
 return text;
 }
 public void setText(String text) {
 this.text = text;
 }
}

So, when I send json to the controller, Controller see same url, but can't deserialize JSON to Java (I think). Because, when I try, to send JSON - { title : "Title" }, and controller wait argument - @RequestBody String note, it can easily display it.

I'm try to do, what was in https://gerrydevstory.com/2013/08/14/posting-json-to-spring-mvc-controller/ and include adapter in servlet.xml, but was the same effect.

AJAX

$.ajax({
 type : "POST",
 contentType : "application/json; charset=utf-8",
 url : window.location.pathname,
 data : JSON.stringify({
 title : $("#titleId").val(),
 text : $("#textId").val()
 }),
 success: function () {
 $("#titleId").val("");
 $("#textId").val("");
 }
 })

• tobias_k: How do you send the JSON? Did you set the content-type to application/json?
• mrchebik: yes, the content type is, wait some time, I add ajax code
• Vaibs: have you added dependency for json in pom.xml?
• mrchebik: yes, mapper-asl and also core-asl
• Vaibs: <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.5.4</version> </dependency> also <dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>20151123</version> </dependency> and try once

Answer 1

Add @RequestMapping(value = "/{username}/add", method = POST, produces = "application/json")

• mrchebik: added, but again, I have same effect
• Tharsan Sivakumar: Sorry earlier I misunderstood the question. Send the data as below. data : { title : $("#titleId").val(), text : $("#textId").val() }

Answer 2

Make sure that you have added content-type to "application/json" in header of your request.

• mrchebik: I try to do it, but it's not change situation gerrydevstory.com/2013/08/14/…

Answer 3

how to catch the problem: Send the String to your controller and try to create your object. Put breakpoint to objectMapper.readValue() and check what is the exactly problem;

@RequestMapping(value = "/{username}/add", method = POST)
public void add(@RequestBody String note) {
 ObjectMapper objectMapper = new ObjectMapper();
 NoteModel noteModel = objectMapper.readValue(result, NoteModel.class);
}

I think that there is some conflict between default ObjectMapper and JSON mapper logic.