REST webservice using Spring MVC returning null while posting JSON

Question

Developing a REST web service using Spring MVC which accepts a JSON request body. And process the received message further. Iam using following : Eclipse, Tomcat, Spring 3.0.1, Jackson lib, Curl for testing the web service

 `curl -i -H "Content-Type: application/json" -H "Accept: application/json" -X POST -d '{"fname":"my_firstname" , "lname":"my_lastname"}' http://localhost:8080/SpringMVC/restful`

returning

"Saved person: null null"

My controller class

 import com.samples.spring.Person; @Controller public class RestController { @RequestMapping(value="{person}", method = RequestMethod.POST) @ResponseBody public String savePerson(Person person) { // save person in database return "Saved person: " + person.getFname() +" "+ person.getLname(); }

My person class

 package com.samples.spring; public class Person { public String fname; public String lname; public String getFname() { return fname; } public void setFname(String fname) { this.fname = fname; } public String getLname() { return lname; } public void setLname(String lname) { this.lname = lname; } }

Solved. Did two things as follows: 1.)Added @RequestBody 2.)Changed the Curl's JSON parameters from -d '{"fname":"my_firstname" , "lname":"my_lastname"}' ---- -d "{"""fname""":"""my_firstname""" , """lname""":"""my_lastname"""}". Can anyone explain this ??? — user2870419
– user2870419, Commented Oct 11, 2013 at 11:22

David · Accepted Answer · 2013-10-11 10:23:16Z

try to add @RequestBody

@RequestMapping(value="{person}", method = RequestMethod.POST) @ResponseBody public String savePerson(@RequestBody Person person) { // save person in database return "Saved person: " + person.getFname() +" "+ person.getLname(); }

Juned Ahsan · Accepted Answer · 2013-10-11 10:21:26Z

try to add a constructor your Person class:

public Person(String fname, String lname) { this.fname = fname; this.lname = lname; }

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