Change encoding of HttpServletResponse

I have an API that returns XML, it actually returns it using the default encoding (I believe it's UTF-8), but now requirements have changed and we need to return everything in UTF-16LE.

My question is: is there an开发者_如何学Python easy way of doing this? I have access to the response just before the calls complete so I was wondering if I could do something like

//This method does not exist
response.setCharacterEncoding("UTF-16LE");

Thanks a lot!

UPDATE: The method mentioned is the one to use. I was using an old version (2.3) of the servlet API that did not include it. Changing the version fixed it all.

Uhh, the method does exist, here

Sets the character encoding (MIME charset) of the response being sent to the client, for example, to UTF-8. If the character encoding has already been set by setContentType(java.lang.String) or setLocale(java.util.Locale), this method overrides it. Calling setContentType(java.lang.String) with the String of text/html and calling this method with the String of UTF-8 is equivalent with calling setContentType with the String of text/html; charset=UTF-8.

As others have stated, use either:

response.setCharacterEncoding("UTF-16LE");

or:

response.setHeader("Content-Type", "text/xml; charset=UTF-16LE");

...but make sure you do this before calling response.getWriter(); ...!

First

response.setHeader("Content-Type", "text/xml; charset=UTF-16LE");

Then, make sure you're actually emitting that encoding!

I found that you MUST set the character encoding to at least UTF-8 because the default is ISO-8859-1. The ISO-8859-1 character set doesn't account for some extended characters. I wrote a helper function to use what is sent in the "Accept" header:

public static void setResponseCharacterSet(HttpServletRequest request, HttpServletResponse response)
{
    String type = "UTF-8";
    if(request.getHeader("accept") != null)
    {
        String[] params = request.getHeader("accept").split("charset=");
        if(params.length == 2) {
            type = params[1];
        }
    }
    response.setCharacterEncoding(type);
}

just do the following thing:

byte[] k =xml.getBytes("UTF-16"); // xml is the string with unicode content.  getBytes("UTF-16") encodes given String into a sequence of bytes and returns an array of bytes. you can use xml.getBytes(UTF8_CHARSET); for utf-8 encoding

response.setContentType("text/xml");
response.setContentLength(k.length);
response.getOutputStream().write(k);
response.getOutputStream().flush();
response.getOutputStream().close();