How to use body-parser in express router?

I have a post api that has object but i am not able to print in console its throowing undefined i thought i am missing body-parser but after adding body parser i see error body-parser deprecated bodyParser: use individual json/urlencoded middlewares Any help will be appreciated.

routes.js

var express = require('express');var bodyParser = require('body-parser');var Diagram = require('./api/diagram/diagram.controller');var router = express.Router();router.post('/saveUpdateDiagram',bodyParser,function(req,res){    console.log(req.body);});

app.js

var express = require('express');var path = require('path');var app = express();var bodyParser = require('body-parser');var router = express.Router();var route = require('./server/routes').router;var mongoose = require('mongoose');mongoose.connection.on('connected', function() {    console.log('MongoDB connected ');});app.use(express.static(path.join(__dirname, 'public')));app.use('/', route);app.use(bodyParser.urlencoded({    extended: false}))app.use(bodyParser.json())app.listen(8760, function() {    console.log('I am listening 8760...');});