使用feign封装第三方Http接口，请求出现400

调用第三方接口，传输二字节流，每次批量传输都有一部分传输失败，接口响应超时，返回400，不管修改超时时间多久都不成功

一.使用feign方式

接口调用使用feign包装第三方接口

@FeignClient(name = "xxx-service", url = "${url}", configuration = { FeignClientConfig.class })
public interface ServiceFeign {

@RequestMapping(value = "${a.url}", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
public AResponse getA(ARequest request);

}

调用位置

public class TestA{

　　@Autoware

　　private ServiceFeign serviceFeign;

　　public xx methodA(xxx){

　　   serviceFeign.getA(xxx);

　　}

}

开启feign日志发现报400，第三方无响应返回

怀疑时feign的问题故换成http的：

/**
     * 以HTTP post方式访问指定URL
     * @param url 访问URL
     * @param jsonObject json对象
     * @return 服务器响应内容
     */
    public static String jsonPost(String url, String jsonObject) {
        PostMethod method = new PostMethod(url);
        String body = null;
        if (StringUtils.isNotBlank(jsonObject)) {
            try {
                method.addRequestHeader("Content-type", "application/json; charset=utf-8");
                method.addRequestHeader("Accept", "text/xml,text/javascript,text/html,application/json");
                RequestEntity requestEntity = new StringRequestEntity(jsonObject, "application/json", "utf-8");
                method.setRequestEntity(requestEntity);
                httpClient.executeMethod(method);
                InputStream inputStream = method.getResponseBodyAsStream();
                BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
                StringBuffer stringBuffer = new StringBuffer();
                String str = "";
                while ((str = br.readLine()) != null) {
                    stringBuffer.append(str);
                }
                body = stringBuffer.toString();
                log.info("http返回结果{}",body);
            } catch (Exception e) {
                log.error("连接异常："+e.getMessage(),e);
            } finally {
                method.releaseConnection();
            }
        }
        return body;
    }

发现还是一样的问题（fegin底层可能也是这种方式实现的），

最后解决方法：使用map方式成功了

/**
     * 以HTTP post方式访问指定URL
     * @param url 访问URL
     * @param paramData map对象
     * @return 服务器响应内容
     */
    @SuppressWarnings("deprecation")
    public static String jsonPost(String url, Map<String, Object> paramData) {
        PostMethod method = new PostMethod(url);
        String body = null;
        if (method != null && paramData != null) {
            try {
                method.addRequestHeader("Content-type", "application/json; charset=utf-8");
                method.addRequestHeader("Accept", "application/json");
                String jsonObject = JSONObject.toJSONString(paramData);
                method.setRequestBody(jsonObject);
                httpClient.executeMethod(method);
                log.info("http-jsonPost-jsonObject:" + method.getResponseBodyAsString());
                InputStream inputStream = method.getResponseBodyAsStream();
                BufferedReader br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
                StringBuffer stringBuffer = new StringBuffer();
                String str = "";
                while ((str = br.readLine()) != null) {
                    stringBuffer.append(str);
                }
                body = stringBuffer.toString();
            }catch(SocketTimeoutException te){ 
                log.error("连接超时："+te.getMessage());
            }catch (Exception e) {
                log.error("连接异常："+e.getMessage(),e);
            } finally {
                method.releaseConnection();
            }
        }
        return body;
    }

记录一下，具体原因不是很明白！！！