RestTemplate乱码和No HttpMessageConverter for java.util.HashMap and content type “application/json

• 乱码问题如下所示
  
• 解决方案，设置转换器

private StringHttpMessageConverter m = new StringHttpMessageConverter(Charset.forName("UTF-8"));
private RestTemplate restTemplate = new RestTemplateBuilder().additionalMessageConverters(m).build();

• 如果要传递json数据可能遇到No HttpMessageConverter for java.util.HashMap and content type "application/json
• 需要再改下RestTemplate对象。

    private StringHttpMessageConverter m = new StringHttpMessageConverter(Charset.forName("UTF-8"));
    private RestTemplate restTemplate = new RestTemplateBuilder().additionalMessageConverters(m).additionalMessageConverters(new MappingJackson2HttpMessageConverter()).build();

• 修改后成功，如下图所示