java - How to get the data in Struts 1 from AngularJS POST

Question

I’m using Struts1.2 with AngularJS to POST some data and want to get the data in Java.

I’m able to retrieve the data from the server and able to display it in the screen.

Now I’m trying to POST some data with AngularJS to the server and trying to get the data with request.getParameter() in Java. I made three tries but I couldn't.

Below I have also provided the following files, with explanation and screenshots of my three tries.

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);
           });
    };
        
});

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 single parameter in the request I’m able to get the value in Java

In Controller:

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

In Java:

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

Parameter Value:

Console Output:

Second try:

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

In 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 try:

Third try:

In this case I passed only the $scope.item and removed the content type to pass it as JSON, but I don’t have a clear idea how to get the value in Java

In Controller:

data: $scope.items

Screen shot of third try:

Answer 1

Using the second try, before posting the data convert scope to JSON.

This can be done either in two ways either using JSON API or AngularJS API

I used angular.toJson() and I also used escape method for accepting special characters.

Using request.getParameter() you can get the value in the sever side. Hope solution helps everybody.

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);
       });
};