Issues with Java Spring resttemplate character encoding

Question

I'm using the Java Spring Resttemplate for getting a json via a get request. The JSON I'm getting has instead of special character slike ü ö ä or ß some weird stuff. So I guess somethings wrong with the character encoding. I can't find any help on the internet. The code I'm using for now is:

        String json = restTemplate.getForObject(
        overPassStatementPostCode,
        String.class,
        params);

The overPassStamementPostCode is just a string with placeholders. It gets filled with the parameters in the params Map.

The problem is that the String json doesn't have the wanted encoding.

Thank you for the help. Best regards Daniel

Can you log the response headers? Look for character encoding — David Rabinowitz
– David Rabinowitz, Commented Jan 5, 2015 at 8:28
the logged header is: {Date=[Mon, 05 Jan 2015 09:23:13 GMT], Server=[Apache/2.2.22 (Ubuntu)], Vary=[Accept-Encoding], Keep-Alive=[timeout=5, max=100], Connection=[Keep-Alive], Transfer-Encoding=[chunked], Content-Type=[application/json]} — Shachty
– Shachty, Commented Jan 5, 2015 at 9:27

Mithun · Accepted Answer · 2015-01-05 08:58:05Z

1

You can set the encoding in HttpHeaders. Below code could help you:

HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.set("Accept", "text/html;charset=utf-8");

HttpEntity<?> requestEntity = new HttpEntity(requestHeaders);

RestTemplate template = new RestTemplate();
ResponseEntity<String> response = template.exchange(
                "http://localhost/hello", HttpMethod.GET, requestEntity,
                String.class);

answered Jan 5, 2015 at 8:58

Mithun

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6 Comments

Shachty Over a year ago

Thank you for the help, but characters like üäö ß are still not encoded right. The code I'm using now is:

HttpHeaders requestHeaders = new HttpHeaders();         requestHeaders.set("Accept", "text/html;charset=utf-8");          HttpEntity<?> requestEntity = new HttpEntity(requestHeaders);          RestTemplate template = new RestTemplate();         ResponseEntity<String> json = template.exchange(                 overPassStatementPostCode, HttpMethod.GET, requestEntity,                 String.class,params);

Mithun Over a year ago

Could you please try again after changing the charset to ISO-8859-1?

Shachty Over a year ago

changed the charset in the requestHeaders.set method and still no luck.

Shachty Over a year ago

logged header is :

{Date=[Mon, 05 Jan 2015 09:23:13 GMT], Server=[Apache/2.2.22 (Ubuntu)], Vary=[Accept-Encoding], Keep-Alive=[timeout=5, max=100], Connection=[Keep-Alive], Transfer-Encoding=[chunked], Content-Type=[application/json]}

Mithun Over a year ago

In the example code that I gave the content type is text/html in your case it should be application/json;charset=ISO-8859-1. Could you please confirm if you have made these changes?

|

Stefan · Accepted Answer · 2015-01-05 08:31:56Z

0

Have you tried setting an encoding filter in web.xml?

<filter>
 <filter-name>encodingFilter</filter-name>
 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
 <init-param>
     <param-name>encoding</param-name>
    <param-value>UTF-8</param-value>
 </init-param>
 <init-param>
     <param-name>forceEncoding</param-name>
     <param-value>true</param-value>
 </init-param>
</filter>
<filter-mapping>
 <filter-name>encodingFilter</filter-name>
 <url-pattern>/*</url-pattern>
</filter-mapping>

answered Jan 5, 2015 at 8:31

Stefan

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1 Comment

Shachty Over a year ago

Never used a web.xml for configuration. Have to read about this. I figure I have to registrate this as an applicationcontext?

Nelson · Accepted Answer · 2019-11-07 02:57:55Z

0

Specify a converter that can convert from and to HTTP requests and responses. Here is an example.

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().add(0, new StringHttpMessageConverter(StandardCharsets.UTF_8));

edited Nov 7, 2019 at 2:57

answered Nov 7, 2019 at 2:39

Nelson

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Comments

Bhukailas · Accepted Answer · 2020-08-08 10:10:28Z

0

Upgrading to spring-web 5.2 solves the problem. or set writeAcceptCharset property to false belongs to StringHttpMessageConverter and use that convertor further in RestTemplate instance.

boolean writeAcceptCharSet = false;
List<HttpMessageConverter<?>> c = restTemplate.getMessageConverters();
for (HttpMessageConverter<?> mc : c) {
  if (mc instanceof StringHttpMessageConverter) {
    StringHttpMessageConverter mcc = (StringHttpMessageConverter) mc;
    mcc.setWriteAcceptCharset(writeAcceptCharSet);
  }
}

answered Aug 8, 2020 at 10:10

Bhukailas

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