Example of loading local JSON data from the Component.js

Component.js

sap.ui.define([
	"sap/ui/core/UIComponent",
	"sap/ui/model/json/JSONModel"
], function(UIComponent, JSONModel) {
	"use strict";

	return UIComponent.extend("com.openui5.example.Component", {

		metadata: {
			manifest: "json"
		},

		init: function() {
			// call the base component's init function
			UIComponent.prototype.init.apply(this, arguments);
			
			//Create the model and load data from the local JSON file
			var oModel = new JSONModel("./model/init_data.json");
			oModel.setDefaultBindingMode("OneWay");

			// set the device model
			this.setModel(oModel, "init_data");
		}
	});

});