I am trying to POST a JSON object to a servlet via AJAX. However, the object is null in the servlet. I am unable to figure out what's wrong with this code.
JAVASCRIPT
function submitValues(event, val1, val2)
{
var xmlHttpObj = new XMLHttpRequest();
if(window.XMLHttpRequest)
{
xmlHttpObj = new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
xmlHttpObj = new ActiveXObject("Microsoft.XMLHttp");
}
var jsonObject = submitTheValues(event, val1, val2);
alert("json is:" +jsonObject);
var json = JSON.stringify(jsonObject);
alert("json after stringify:" +json);
xmlHttpObj.open("POST", "../myapp/myservlet", true);
xmlHttpObj.setRequestHeader("Content-type", "application/json");
xmlHttpObj.send(json);
}
SERVLET
String jsonObj = request.getParameter("json");
If you want to receive the data as a parameter you'll have to send it as application/x-www-form-urlencode
.
xmlHttpObj.open("POST", "../myapp/myservlet", true);
xmlHttpObj.setRequestHeader("Content-type", "application/x-www-form-urlencode");
xmlHttpObj.send('json='+encodeURIComponent(json));
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