springboot ResponseEntity<byte[]> 下载文件 byte 都变成base64

@Configuration
public class CustMvcConfig extends WebMvcConfigurationSupport {
    @Autowired
    private FastJsonHttpMessageConverter fastJsonConverter;


    @Override
    protected void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        super.configureMessageConverters(converters);
        converters.add(new ByteArrayHttpMessageConverter()); // ByteArrayHttpMessageConverter 必须加在前面，处理byte数据
        converters.add(fastJsonConverter);// fastjsonConverter 必须加在后面 处理json数据
    }
}