Set Content-Type to application json in jsp file

Question

I am created some jsp file that returns as a response some json string  But I see that the Content-Type is set to txt automatically  My jsp code looks like    lt    page import  java util Random    gt   lt    page language  java    gt   lt    page session  false    gt    lt     String retVal       some json string         int millis   new Random   nextInt 1000              System out println  sleeping for     millis     millis         Thread sleep millis     gt   lt   retVal  gt    How can I perform something like   setHeader  Content-Type    application json      in this example

User · Answer

Try this piece of code  it should work too   lt         response setContentType  Content-Type    application json       this will fail compilation     response setContentType  application json      fixed   gt

User · Answer

You can do via Page directive   For example    lt    page language  java  contentType  application json  charset UTF-8      pageEncoding  UTF-8   gt     contentType  mimeType    charset characterSet       text html charset ISO-8859-1       The MIME type and character encoding the JSP file uses for the   response it sends to the client  You can use any MIME type or   character set that are valid for the JSP container  The default MIME   type is text html  and the default character set is ISO-8859-1

User · Answer

Petr Mensik  amp  kensen john  Thanks  I could not used the page directive because I have to set a different content type according to some URL parameter  I will paste my code here since it s something quite common with JSON        lt           String callback   request getParameter  callback            response setCharacterEncoding  UTF-8            if  callback    null                   Equivalent to   lt  page contentType  text javascript  pageEncoding  UTF-8  gt              response setContentType  text javascript              else                  Equivalent to   lt  page contentType  application json  pageEncoding  UTF-8  gt              response setContentType  application json                                      String output                if  callback    null                output    callback                           output    jsonObj toString             if  callback    null                output                          gt       lt   output   gt    When callback is supplied  returns       callback     JSON stuff         with content-type  text javascript   When callback is NOT supplied  returns           JSON stuff       with content-type  application json

[java] Set Content-Type to application/json in jsp file

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