AngularJS http POST to Servlet

Question

I went through a lot of StackOverflow answers and googled a lot but still could not find why my post request is not working.

This is my jsp:

        
                      

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Answer 1

You are using a POST request and your data is sent in the request body - not as parameter. You need to read the content using request.getReader().

// example using the javax.json.stream package
JsonParser parser = Json.createParserFactory().createParser(request.getReader());

Answer 2

Your request does not contain a URL parameter named "data", therefore request.getParameter("data") returns null and you get the NullPointerException.

You try to send a Javascript object via URL parameters which does not go well with non-shallow objects.

I would recommend to send the data as request payload:

JsonObject obj = (JsonObject) parser.parse(request.getReader());

On the client you need to make sure that your data is sent as proper JSON:

$http({
        method : 'POST',
        url : 'login',
        contentType: 'application/json',
        data : JSON.stringify($scope.user),
    })...

Answer 3

i think you should be sending data as

$http({
    method : 'POST',
    url : 'login',
    data : {data: $scope.user},
    headers: {
        'Content-Type': 'application/json'
    }
}).success(function(data) {
    console.log(data);
});

pay attention to data : {data: $scope.user}