spring boot with restcontroller using jsonobject not working

Question

I am using spring boot, and while making a restcontroller or controller if I use the jsonobject type request then it doesnt work, whereas same works when I change type to string.

@Controller
@RequestMapping("rest/dummy")

public class CustomerController {

    @GetMapping("test")
    public ResponseEntity test(@RequestParam("req") JSONObject inputData) {
        org.json.JSONObject response = new org.json.JSONObject();
        response.put("abc", "123");
        return new ResponseEntity(inputData.toString(), HttpStatus.OK);
    }

pom.xml:

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>1.5.8.RELEASE</version>
</dependency>
<dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20171018</version>
        </dependency>
        <dependency>
            <groupId>javax.persistence</groupId>
            <artifactId>persistence-api</artifactId>
            <version>1.0.2</version>
        </dependency>

I do want to use it both GET and POST type and also I want to use jsonobject for both request and response as the data can change on fly and its type.

Possible duplicate of Returning JSON object as response in Spring Boot — utpal416
– utpal416, Commented Nov 28, 2017 at 19:01

Ravat Tailor · Accepted Answer · 2017-11-28 19:04:44Z

2

In RequestParam , we send key values which added in URL, To send Json object send it in RequestBody .

Use @RequestBody and send your Json in body part of your request.

answered Nov 28, 2017 at 19:04

Ravat Tailor

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3 Comments

kapil gupta Over a year ago

I want to use GET type also, in that case I will have to passit in URL

Ravat Tailor Over a year ago

RequestParam always be string , convert that string to Json object in your method, using Jackson json parser.

kapil gupta Over a year ago

No it is not working, but what I noticed is same application works fine on linux whereas on windows it doesnt. In Linux it works with RequestParam as JSONObject

helt · Accepted Answer · 2017-11-28 19:11:09Z

0

Using real POJOs as params and return values is the better approach imo. Use Jackson annotations to configure those POJOs.

Anyways. This should work:

@GetMapping("test")
public ResponseEntity<String> test(@RequestParam("req") JSONObject inputData) {
    org.json.JSONObject response = new org.json.JSONObject();
    response.put("abc", "123");
    return ResponseEntity.ok(inputData.toString());
}

alternatively

@GetMapping("test")
public ResponseEntity<SomeOutputDto> test(@RequestParam("req") String inputData) {

    SomeOutputDto out = new SomeOutputDto();
    out.setAbc(123);
    return ResponseEntity.ok(dto);
}

this requires a additional class: SomeOutputDto, but on the other hand, you have more control over your code.

public class SomeOutputDto {
   private int abc = 0;

  public void setAbc(int v) {
    this.abc = v;
  }
  public int getAbc() { return this.abc; }
}

answered Nov 28, 2017 at 19:11

helt

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1 Comment

kapil gupta Over a year ago

Tried but it didnt work, also I want to use json as I have request which can keep changing and do not have rigid structure as of POJO

kapil gupta · Accepted Answer · 2018-02-05 06:50:55Z

0

Got it working by using apache-tomcat 8.0.15, the same doesnt work with apache-tomcat 8.0.49

answered Feb 5, 2018 at 6:50

kapil gupta

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