//设置请求头信息

HttpHeaders httpHeaders=new HttpHeaders();

//发送请求头格式 为json/编码为utf-8

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

//接收请求头

httpHeaders.add("Accept",MediaType.APPLICATION_JSON.toString());

//将请求对象转换成json对象 ，后面加设置的请求信息

HttpEntity<Obj> entity=new Httpentity(JSONObject.toJSONString(obj),httpHeaders);

使用restTemplate进行服务之间调用的时候，解析传递回来的json数据 jackson中

ObjectMapper objectMapper=new ObjectMapper();

//

objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS,false);

//

objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERITES,false);

//

objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.LOWER_CAMEL_CASE);

objectMapper.readValue(obj,转换的类型的class文件)；