实现http请求，使用RestTemplate请求参数使用body，请求头加入header信息调用实现

/**
 * post请求（body参数）
 * @param url 请求地址
 * @param bodyMapParam bodyMapParam 参数
 * @param queryParam url参数
 * @param headers 请求头
 * @return
 */
public String postBody(String url, Map<String,String> bodyMapParam, MultiValueMap<String,String> queryParam, Map<String,String> headers){
    HttpHeaders header = new HttpHeaders();
    header.setContentType(MediaType.APPLICATION_JSON);
    //拼接请求头
    if(headers != null && !headers.isEmpty()){
        for(Map.Entry<String,String> entry : headers.entrySet()){
            header.add(entry.getKey(),entry.getValue());
        }
    }
    HttpEntity<Map> request = new HttpEntity<Map>(bodyMapParam, header);
    UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url).queryParams(queryParam);
    ResponseEntity<Object> responseEntity = restTemplate.postForEntity(builder.toUriString(), request, Object.class);
    return JsonUtil.parseJson(responseEntity);
}