RestTemplate设置转换类型

缘起

有的接口啊，明明返回是json数据，但是响应头里面指定的Content-Type 值却是 text/plain。那么这就导致我们通过RestTemplete请求的时候会报错
Could not extract response: no suitable HttpMessageConverter found for response typ
比如微信的请求openid的接口

解决方案

新建WxMappingJackson2HttpMessageConverter类

public class WxMappingJackson2HttpMessageConverter extends MappingJackson2HttpMessageConverter {
    public WxMappingJackson2HttpMessageConverter(){
        List<MediaType> mediaTypes = new ArrayList<>();
        mediaTypes.add(MediaType.TEXT_PLAIN);
        mediaTypes.add(MediaType.TEXT_HTML);
        setSupportedMediaTypes(mediaTypes);
    }
}

设置restTemplate的MessageConverters

@Component
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate(){
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.getMessageConverters().add(new WxMappingJackson2HttpMessageConverter());
        return restTemplate;
    }
}

使用

@RequiredArgsConstructor
public class UserController {
    private final RestTemplate restTemplate;
}