Question

I am using Servlet as controller and jquery to send request to server. Following is my jquery request

$.post("login", {userName:$userName, password:$password}, function(data, textStatus) {
alert(textStatus);
});

And in server side i have written following code

response.setContentType("text/plain");
            PrintWriter out = response.getWriter();
            out.println("" + strError + "");
            out.flush();
            out.close();

I want to set error message and error error status code in servlet and read the same status code in jquery. How can I achieve the same?

Answer 1

You can return a json encoded string from the server. How do you return a JSON object from a Java Servlet

For example if you sent the following json encoded string back.
{‘error’: ‘This is some error message’ }

Then on the client side you would do the following

$.post("login", {userName:$userName, password:$password}, function(data, textStatus) {
    alert(data.error); // your error message will show up here in the data object 
 },'json');