How to get data in Struts from AngularJS post

Question

I am using Struts1.2 with Angular to post some data and want to get the data in java.

Im able to extract data from the server and display it on the screen.

Now I'm trying to send some data using Angular to the server and try to get the data from request.getParameter in java. I made three attempts, but I could not.

Below I have also provided the following files with explanations and screenshots of my three attempts.

1. CartController.js

 var myApp = angular.module('cartApp',[]); myApp.controller('CartController', function ($scope,$http) { $scope.bill = {}; $scope.items = []; $http.post('/StrutsWithAngular/shopingCart.do') .success(function(data, status, headers, config) { $scope.items = data; }) .error(function(data, status, headers, config) { //alert("Error :: "+data); }); // First Try $scope.postData = function() { $http({ method: 'POST', url: '/StrutsWithAngular/shopingCart.do', data: 'value=' + 'Parameter From Request' , headers: {'Content-Type': 'application/x-www-form-urlencoded'} }).success(function(data, status, headers, config) { alert("Success :: "+status); $scope.items = data; }).error(function(data, status, headers, config) { alert("Error :: "+data); }); }; // Second Try $scope.postData = function() { $http({ method: 'POST', url: '/StrutsWithAngular/shopingCart.do', data: 'cartValues=' + {cartValues : $scope.items} , headers: {'Content-Type': 'application/x-www-form-urlencoded'} }).success(function(data, status, headers, config) { $scope.items = data; }).error(function(data, status, headers, config) { // alert("Error :: "+data); }); }; // Third try $scope.postData = function() { $http({ method: 'POST', url: '/StrutsWithAngular/shopingCart.do', data: $scope.items }).success(function(data, status, headers, config) { $scope.items = data; }).error(function(data, status, headers, config) { // alert("Error :: "+data); }); }; }); 

2. CartAction.java

 package com.myapp.action; import com.myapp.dto.ShopingCartDto; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sf.json.JSONArray; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; public class CartAction extends org.apache.struts.action.Action { private static final String SUCCESS = "success"; /** * This is the action called from the Struts framework. * * @param mapping The ActionMapping used to select this instance. * @param form The optional ActionForm bean for this request. * @param request The HTTP Request we are processing. * @param response The HTTP Response we are processing. * @throws java.lang.Exception * @return */ @Override public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { System.out.print("Cart App"); String value = request.getParameter("value"); System.out.print("value ::"+ value); String requestValue = request.getParameter("cartValues"); System.out.print("Requested Values ::"+ requestValue); if(requestValue!=null){ System.out.println("Requested Values :: "+requestValue); JSONObject object = JSONObject.fromObject(requestValue); System.out.println("Object Keys ::" +object.keys()); Iterator iter = object.keys(); System.out.println("Iter :: "+iter.toString()); while (iter.hasNext()) { String key = (String) iter.next(); System.out.println("Keys " + key); JSONArray array = object.getJSONArray(key); for (int i = 0; i < array.size(); i++) { JSONObject powertrainOperationJSON = JSONObject.fromObject(array.get(i)); } } } List<Object> shopingCartDtos = new ArrayList<>(); ShopingCartDto shopingCartDtoOne = new ShopingCartDto(); ShopingCartDto shopingCartDtoTwo = new ShopingCartDto(); ShopingCartDto shopingCartDtoThree = new ShopingCartDto(); shopingCartDtoOne.setSno(1); shopingCartDtoOne.setTitle("Title 1"); shopingCartDtoOne.setQuantity("11"); shopingCartDtoOne.setPrice("25"); shopingCartDtoTwo.setSno(2); shopingCartDtoTwo.setTitle("Title 2"); shopingCartDtoTwo.setQuantity("12"); shopingCartDtoTwo.setPrice("25"); shopingCartDtoThree.setSno(3); shopingCartDtoThree.setTitle("Title 3"); shopingCartDtoThree.setQuantity("13"); shopingCartDtoThree.setPrice("25"); shopingCartDtos.add(shopingCartDtoOne); shopingCartDtos.add(shopingCartDtoTwo); shopingCartDtos.add(shopingCartDtoThree); ajaxResponse(response, shopingCartDtos); return null; } } 

/////

First try: when I tried with a single parameter in the request. Im was able to get the value in java

In the controller: -

 data: 'value=' + 'Parameter From Request' 

In Java: -

 String value = request.getParameter("value"); System.out.print("value ::"+ value); 

Parameter Value: Screenshot

Console exit

Second attempt:

Now, when I tried to get some heap of values ​​in java, I couldn’t, here in this case I passed $ scope.item with the content type "application / x-www-form-urlencoded" in the parameter "cartValues", In java when trying get the value from request.getParameter ("cartValues") the value is printed as [object Object], as in the request. But when trying to parse value using JSON api in java, there is an exception

In the controller: -

 data: 'cartValues=' + {cartValues : $scope.items} , headers: {'Content-Type': 'application/x-www-form-urlencoded'} 

In Java: -

  String requestValue = request.getParameter("cartValues"); System.out.print("Requested Values ::"+ requestValue); 

Screenshot of my second attempt

Third attempt:

In this case, I only passed $ scope.item and removed the content type to pass it as JSON, but I have no clear idea of ​​how to get the value in Java

In the controller: -

 data: $scope.items 

Screenshot of the third attempt

Answer 1

Using second try, before sending data conversion area in json

This can be done in two ways, either using the JSON api or Angular api

I used angular.toJson () and also used the escape method to accept special characters.

Using request.getParameter, you can get this value aside on the side. Hope's solution helps everyone.

// Second try

 $scope.postData = function() { var data = escape(angular.toJson($scope.items)); $http({ method: 'POST', url: '/StrutsWithAngular/shopingCart.do', data: 'cartValues='+data, headers: {'Content-Type': 'application/x-www-form-urlencoded'} }).success(function(data, status, headers, config) { $scope.items = data; }).error(function(data, status, headers, config) { // alert("Error :: "+data); }); }; 

Answer 2

Angular does not generate POST form data, it passes a JSON object to the server. For information on JSON itself, see JSON.org . There are also many libraries on this page that let you parse JSON in a variety of languages, including Java. Not being a Java developer, I cannot say that one of them is better than the other, but you should be able to get a good idea of ​​suitability by reading the documents on each of them.

Answer 3

This is not data that you should use params instead of a data tag.

 $scope.postData = function() { var data = escape(angular.toJson($scope.items)); $http({ method: 'POST', url: '/StrutsWithAngular/shopingCart.do', params: 'cartValues='+data, headers: {'Content-Type': 'application/x-www-form-urlencoded'} }).success(function(data, status, headers, config) { $scope.items = data; }).error(function(data, status, headers, config) { // alert("Error :: "+data); }); };