JSON character encoding

Question

My Java web application submits an AJAX request that returns JSON such     value    a  riennes     When  a  riennes  is displayed in the webpage  it appears as  a riennes   so I guess there s some kind of character encoding problem  The AJAX response headers include  Content-Type    application json   which doesn t appear to include any charset information  I guess this needs to be changed to something like  Content-Type    text html  charset iso-8859-1       or charset utf8    The server-side of the app is Spring MVC  and I guess there must be a way to set the default charset for each response

User · Answer

First  your posted data isn t valid JSON  This would be     value    a  riennes     Note the double quotes  They are required   The Content-Type for JSON data should be application json  The actual JSON data  what we have above  should be encoded using UTF-8  UTF-16  or UTF-32 - I d recommend using UTF-8   You can use a tool like Wireshark to monitor network traffic and see how the data looks  you should see the bytes c3 89 for the     I ve never worked with Spring  but if it s doing the JSON encoding  this is probably taken care of properly  for you   Once the JSON reaches the browser  it should good  if it is valid  However  how are you inserting the data from the JSON response into the webpage

User · Answer

If you re using StringEntity try this  using your choice of character encoding  It handles foreign characters as well

User · Answer

finally I got the solution   Only put this line    RequestMapping value     YOUR URL Name  method   RequestMethod POST produces    application json  charset utf-8     this will definitely help

User · Answer

response setContentType  application json charset utf-8

User · Answer

Also  you can use spring annotation RequestMapping above controller class for receveing application json utf-8 in all responses   Controller  RequestMapping produces     application json  charset UTF-8       charset UTF-8    public class MyController

User · Answer

I don  t know if this is relevant anymore  but I fixed it with the  RequestMapping annotation    RequestMapping method RequestMethod GET  produces   application json  charset UTF-8

User · Answer

If the suggested solutions above didn t solve your issue  as for me   this could also help   My problem was that I was returning a json string in my response using Springs  ResponseBody  If you re doing this as well this might help   Add the following bean to your dispatcher servlet     lt bean     class  org springframework web servlet mvc annotation AnnotationMethodHandlerAdapter  gt       lt property name  messageConverters  gt           lt list gt               lt bean                 class  org springframework http converter StringHttpMessageConverter  gt                   lt property name  supportedMediaTypes  gt                       lt list gt                           lt value gt text plain charset UTF-8 lt  value gt                       lt  list gt                   lt  property gt               lt  bean gt           lt  list gt       lt  property gt   lt  bean gt     Found here  http   forum spring io forum spring-projects web 74209-responsebody-and-utf-8

User · Answer

That happened to me exactly the same with this    lt    page language  java  contentType  application json  pageEncoding  UTF-8   gt    But this works for me    lt    page language  java  contentType  application json  charset UTF-8  pageEncoding  UTF-8   gt    Try adding    charset UTF-8   to your contentType

User · Answer

The answers here helped me solve my problem  although it s not completely related   I use the javax ws rs API and the  Produces and  Consumes annotations and had this same problem - the JSON I was returning in the webservice was not in UTF-8  I solved it with the following annotations on top of my controller functions     Produces javax ws rs core MediaType APPLICATION JSON      charset UTF-8     and   Consumes javax ws rs core MediaType APPLICATION JSON      charset UTF-8     On every endpoint s get and post function  I wasn t setting the charset and this solved it  This is part of jersey so maybe you ll have to add a maven dependency

User · Answer

The symptoms indicate that the JSON string which was originally in UTF-8 encoding was written to the HTTP response using ISO-8859-1 encoding and the webbrowser was instructed to display it as UTF-8  If it was written using UTF-8 and displayed as ISO-8859-1  then you would have seen a    riennes  If it was written and displayed using ISO-8859-1  then you would have seen a      riennes   To fix the problem of the JSON string incorrectly been written as ISO-8859-1  you need to configure your webapp   Spring to use UTF-8 as HTTP response encoding  Basically  it should be doing the following under the covers   response setCharacterEncoding  UTF-8      Don t change your content type header  It s perfectly fine for JSON and it is been displayed as UTF-8

[java] JSON character encoding

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