SpringBoot 响应字符集错误

Question

i got some problems with my SpringBoot REST Controller. This simply does a http GET call to our database and should return a simple String / json. when i call the URL simply in my browser or via my angular 3 app, the response has some charset errors and i don't know, how to fix them. I suggest, it is a UTF-8 problem.

First to show you the output: this is how it comes from the Controller: MeinekestraÃe and it should be Meinekestraße

here is a part of my SpringBoot Controller:

@Controller
public class RecieverController {

@Value("${server}")
private String server;

@Value("${user.token}")
private String token;   

@RequestMapping(value="/reciever", method=RequestMethod.GET, produces = "text/plain;charset=UTF-8")
@ResponseBody
@CrossOrigin(origins = "http://localhost:4200", maxAge = 3600)
public String getRecieverData(
        @RequestHeader(value="Accept") String accept,
        @RequestHeader(value="Host") String host) {

    final String url = server + "/rest/client/profile";

    RestTemplate restTemplate = new RestTemplate();
    HttpHeaders headers = new HttpHeaders();

    headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
    headers.set("Auth-Token", token); // user_token

    HttpEntity<String> entity = new HttpEntity<String>("parameters", headers);

    ResponseEntity<String> response = restTemplate.exchange(url, HttpMethod.GET, entity, String.class);

    return response.getBody();
}}

I tried the following things, but nothing changed in the output.

spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true
spring.http.encoding.force=true

or this

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters()
    .add(0, new StringHttpMessageConverter(Charset.forName("UTF-8")));

any other ideas what could be the problem? the database isnt the issue. Everything is stored correctly there.

Edit: this is the screenshot of the header from the output and a part from the json output:

The Problem could be solved by adding both

spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true
spring.http.encoding.force=true

and this

RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters()
    .add(0, new StringHttpMessageConverter(Charset.forName("UTF-8")));

Thanks @dienerd for helping me via chat

Answer 1

For the ones looking for a way to force encoding request/response in @RestController in a Spring Boot project.

spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true
spring.http.encoding.force=true

is deprecated, in your application.yaml or application.properties use the following:

server.servlet.encoding.charset=UTF-8
server.servlet.encoding.force=true

This did the trick for me.