在AJAX中检索XML响应

Question

I've written a java code (Spring controller) snippet to send XML response to an AJAX. Unfortunately I'm unable to get the response as XML using xhr.responseXML but can as a text using xhr.responseText . Instead of parsing the text at client side would someone suggest what was the actual issue? Here I am enclosing controller and AJAX code.

Spring controller code:
-------------------------------
String xmlResp = "<cities>";
xmlResp+="<city>";
xmlResp+="<name>" + "Hyderabad" + "</name>";
xmlResp+="<population>" + "3000000" + "</population>";
xmlResp+="</city>";
xmlResp+="<city>";
xmlResp+="<name>" + "Bangalore" + "</name>";
xmlResp+="<population>" + "4500000" + "</population>";
xmlResp+="</city>";
xmlResp+="</cities>";

response.setContentType("text/xml");
response.getWriter().write(xmlResp);


AJAX code:
-----------------------------

reading as XML:

var xml=xhr.responseXML;
        alert(xml);

reading as Text
var text=xhr.responseText;
        alert(text);

for convenience the XML structure:

<cities>
    <city>
        <name>Hyderabad</name>
        <population>3000000</population>
    </city>
    <city>
        <name>Bangalore</name>
        <population>4500000</population>
    </city>
</cities>

Answer 1

Your XML is not well-formed:

String xmlResp = "'<'cities>";

will give:

'<'cities>

• Do use a validator or lint to check your XML
• Don't build an XML document by mashing strings together, use an XML library instead