java代碼調用第三方介面

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一、利用httpclient來字串參數（url是第三方介面，不帶參數，如:http://192.168.16.200:8081/faceInfo/list，param是url後面所要帶的參數）

public static JSONObject getHttpResponseJson(String url,Map<String,String> param){        CloseableHttpClient httpclient = null;        CloseableHttpResponse response = null;        JSONObject jsonObject = null;                try {            //請求發起用戶端            httpclient = HttpClients.createDefault();            //參數集合            List postParams = new ArrayList();            //遍曆參數並添加到集合            for(Map.Entry<String, String> entry:param.entrySet()){                postParams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));            }            //通過post方式訪問            HttpPost post = new HttpPost(url);            HttpEntity paramEntity = new UrlEncodedFormEntity(postParams,"UTF-8");            post.setEntity(paramEntity);            response = httpclient.execute(post);            HttpEntity valueEntity = response.getEntity();            String content = EntityUtils.toString(valueEntity);            jsonObject = JSONObject.fromObject(content);                        return jsonObject;        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (ClientProtocolException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }finally{            if(httpclient != null){                try {                    httpclient.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if(response != null){                try {                    response.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }        return jsonObject;    }

二、利用httpclient來同時上傳檔案和其他字串參數(postUrl)

public static String getHttpResponseString(String postUrl,Map<String,String> filePathParam,Map<String,String> param){        //1:建立一個httpclient對象        HttpClient httpclient = new DefaultHttpClient();        Charset charset = Charset.forName("UTF-8");//設定編碼        try {            //2：建立http的發送方式對象，是GET還是post            HttpPost httppost = new HttpPost(postUrl);            //3：建立要發送的實體，就是key-value的這種結構，藉助於這個類，可以實現檔案和參數同時上傳            MultipartEntity reqEntity = new MultipartEntity();                        //遍曆圖片並添加到MultipartEntity實體中            for(Map.Entry<String, String> entry:filePathParam.entrySet()){                 FileBody fileContent = new FileBody(new File(entry.getValue()));                 reqEntity.addPart(entry.getKey(),fileContent);            }                        //遍曆參數並添加到MultipartEntity實體中            for(Map.Entry<String, String> entry:param.entrySet()){                StringBody content = new StringBody(entry.getValue(),charset);                reqEntity.addPart(entry.getKey(), content);            }                        httppost.setEntity(reqEntity);            //4：執行httppost對象，從而獲得資訊            HttpResponse response = httpclient.execute(httppost);            HttpEntity resEntity = response.getEntity();            //獲得返回來的資訊，轉化為字串string            String resString = EntityUtils.toString(resEntity);            return resString;        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (IllegalStateException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally {            try { httpclient.getConnectionManager().shutdown(); } catch (Exception ignore) {}        }        return null;    }

 

java代碼調用第三方介面