Json object parse and pass to spring contoller

Question

I have a file upload component in my jsp, and i accepts only json format files. i want to get json file and pass it to spring and do manipulations of the json object in spring.

my javascript looks like below

var file = this.files[0];
 var reader = new FileReader();

  var oMyForm = new FormData();
  oMyForm.append("file", this.files[0]);

 console.log('reader='+JSON.stringify(reader)) // this does not print any it prints empty as "reader={}"
console.log('oMyForm ='+JSON.stringify(oMyForm )) // this does not print any it prints empty as "oMyForm={}"
var urlpath =  "<%=request.getContextPath()%>/fileUpload";
  $.ajax({
                    data : JSON.stringify(reader),
                    type : 'POST',
                    dataType: 'json',
                    headers: { 
                        'Accept': 'application/json',
                        'Content-Type': 'application/json' 
                    },
                    url : urlpath,
                    success : function(data){
                    }
               });

Java class

@RequestMapping(value= "/fileUpload", method=RequestMethod.POST,consumes="application/json")
    public void fileUpload(){
         //here i want to get the json object and do parsing and manipulations on the object
         System.out.println(" uploaded!");
    }

As well, when i upload the file it hits the controller class, but in browser console it throws error as

"NetworkError: 404 Not Found - http://localhost:8080/proj/fileUpload"

But when i try to print hardcoded value from JSON.stringify(hardcoded)

Json file content:

{'Gyr-x':10.11,'Gyr-y':9.66,'Gyr-z':10.93,'Temparature':30,'Pressure':101,'Humidity':15,'deviceId':1}

how do you know it hit the server ? what do you mean by print harcoded value ? on server or client ? — Searching, Jan 13 '17 at 06:34
it hits server sysout is printing. printing hardcoded values is, instead of uploading file put json into variable and print it in browser console — user2000189, Jan 13 '17 at 06:58

score 0 · Accepted Answer · answered Jan 13 '17 at 07:21

0

@RequestMapping(value= "/fileUpload", method=RequestMethod.POST,consumes="application/json")
public void fileUpload(@requestBody String json){
     //here i want to get the json object and do parsing and manipulations on the object
     System.out.println(" uploaded!");
}

and in javascript try url:fileUpload

your page is not hitting controller thats why its giving 404 error

answered Jan 13 '17 at 07:21

Pratik Ranjane

16
1

controller is hitting properly.. i am checking this via debug and sysout – user2000189 Jan 13 '17 at 09:01
what problem you are getting now.? – Pratik Ranjane Jan 13 '17 at 12:23

Json object parse and pass to spring contoller

my javascript looks like below

Java class

Json file content:

1 Answers1