##实例

String url = "http://demo/api/book/";        HttpHeaders headers = new HttpHeaders();        MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");        headers.setContentType(type);        String requestJson = "{...}";        HttpEntity
    
      entity = new HttpEntity
     
      (requestJson,headers);        String result = restTemplate.postForObject(url, entity, String.class);        System.out.println(result);
     
    

##设置contentType解决中文乱码

MediaType type = MediaType.parseMediaType("application/json; charset=UTF-8");