Understanding the distinction among servlet responses in JavaScript?

I have a situation on my website where I am utilizing ajax to send information to a java servlet and then using the following javascript code to read the response:

            $.ajax({
            url : 'myfirstservlet',
            async: false,
            data : {
                       //send info..
                   },

            success : function(responseText) {

                //receive response..
            }
        });

In my servlet, I am sending back multiple responses. For example:

    String response1 = "response1";
    int response2 = 5;
    out.println(response1);
    out.println(response2);

So how can I retrieve these two different responses and store them in separate javascript variables?

For instance:

$var response1 = ['response1'];
$var response2 = ['response2'];

Thank you :)

javajavascriptajaxservlets

Answer №1

Assuming that the variable out represents the response writer, the output will look like this:

response1
5

Alternatively, you could consider constructing a JSON object rather than using plain text.

{
    "res1":"response1",
    "res2":"5"
}

Answer №2

When you need to send two different sets of data in one response, you can achieve this by utilizing either Json or properly deliminating your data.

If the response consists of simple strings, it is advisable to use a delimation method. Avoid using ',' as a delimiter if there is a chance that the string might contain commas. Instead, opt for a delimiter with multiple characters like '#Delem#'.

  • On the other hand, if the data is more complex and includes object structures with aggregation and constitution, then JSON is the way to go.

Answer №3

It appears we may be over-complicating things.

When it comes to HTTP, there is no concept of sending multiple responses to a single request. A client sends a request and the server returns a response. The code provided actually only sends a single response containing two pieces of data.

Since you are utilizing println, your output will naturally be line-separated. To handle this on the client side, simply split the response on CRLF.

var parts = response.split(/\r?\n/);
var part1 = parts[0];
var part2 = parts[1];

If the data being transferred remains simple and unlikely to expand, the current approach should suffice. However, for a more scalable solution, using JSON is highly recommended.

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