舉例說明JAVA調(diào)用第三方接口的GET/POST/PUT請(qǐng)求方式

更新時(shí)間：2024年01月09日 09:05:29 作者：英勇的小王同志

在日常工作和學(xué)習(xí)中,有很多地方都需要發(fā)送請(qǐng)求,這篇文章主要給大家介紹了關(guān)于JAVA調(diào)用第三方接口的GET/POST/PUT請(qǐng)求方式的相關(guān)資料,文中通過代碼介紹的非常詳細(xì),需要的朋友可以參考下

GET請(qǐng)求

public static String doGet(String url, String charset){

        System.out.println("請(qǐng)求的接口："+url);

        /**
         * 1.生成HttpClient對(duì)象并設(shè)置參數(shù)
         */
        HttpClient httpClient = new HttpClient();
        //設(shè)置Http連接超時(shí)為5秒
        httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(5000);

        /**
         * 2.生成GetMethod對(duì)象并設(shè)置參數(shù)
         */
        GetMethod getMethod = new GetMethod(url);
        //設(shè)置get請(qǐng)求超時(shí)為5秒
        getMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);
        //設(shè)置請(qǐng)求重試處理，用的是默認(rèn)的重試處理：請(qǐng)求三次
        getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());

        String response = "";

        /**
         * 3.執(zhí)行HTTP GET 請(qǐng)求
         */
        try {
            int statusCode = httpClient.executeMethod(getMethod);

            /**
             * 4.判斷訪問的狀態(tài)碼
             */
            if (statusCode != HttpStatus.SC_OK){
                System.err.println("請(qǐng)求出錯(cuò)：" + getMethod.getStatusLine());
            }

            /**
             * 5.處理HTTP響應(yīng)內(nèi)容
             */
            //HTTP響應(yīng)頭部信息，這里簡單打印
            Header[] headers = getMethod.getResponseHeaders();
           /* for (Header h: headers){
                System.out.println(h.getName() + "---------------" + h.getValue());
            }*/
            //讀取HTTP響應(yīng)內(nèi)容，這里簡單打印網(wǎng)頁內(nèi)容
            //讀取為字節(jié)數(shù)組
            byte[] responseBody = getMethod.getResponseBody();
            response = new String(responseBody, charset);
            System.out.println("接口返回?cái)?shù)據(jù)為：" + response);
            //讀取為InputStream，在網(wǎng)頁內(nèi)容數(shù)據(jù)量大時(shí)候推薦使用
            //InputStream response = getMethod.getResponseBodyAsStream();
            return response;
        } catch (HttpException e) {
            //發(fā)生致命的異常，可能是協(xié)議不對(duì)或者返回的內(nèi)容有問題
            System.out.println("請(qǐng)檢查輸入的URL!");
            e.printStackTrace();
            return "調(diào)用GET請(qǐng)求失敗";
        } catch (IOException e){
            //發(fā)生網(wǎng)絡(luò)異常
            System.out.println("發(fā)生網(wǎng)絡(luò)異常!");
            e.printStackTrace();
            return "調(diào)用GET請(qǐng)求失敗";
        }finally {
            /**
             * 6.釋放連接
             */
            getMethod.releaseConnection();
        }
    }

//get請(qǐng)求示例
String result = HttpClientToInterface.doGet("http://127.0.0.1:8085/xxxx/xxxx?yy=yyyyyy&zz=zzzzzzz","UTF-8");

POST請(qǐng)求

public static String doPost(String url, String charset){

        System.out.println("請(qǐng)求的接口："+url);

        /**
         * 1.生成HttpClient對(duì)象并設(shè)置參數(shù)
         */
        HttpClient httpClient = new HttpClient();
        //設(shè)置Http連接超時(shí)為5秒
        httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(5000);

        /**
         * 2.生成PostMethod對(duì)象并設(shè)置參數(shù)
         */
        PostMethod postMethod = new PostMethod(url);
        //設(shè)置post請(qǐng)求超時(shí)為5秒
        postMethod.getParams().setParameter(HttpMethodParams.SO_TIMEOUT, 5000);
        //設(shè)置請(qǐng)求重試處理，用的是默認(rèn)的重試處理：請(qǐng)求三次
        postMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());

        String response = "";

        /**
         * 3.執(zhí)行HTTP POST 請(qǐng)求
         */
        try {
            int statusCode = httpClient.executeMethod(postMethod);

            /**
             * 4.判斷訪問的狀態(tài)碼
             */
            if (statusCode != HttpStatus.SC_OK){
                System.err.println("請(qǐng)求出錯(cuò)：" + postMethod.getStatusLine());
            }

            /**
             * 5.處理HTTP響應(yīng)內(nèi)容
             */
            //HTTP響應(yīng)頭部信息，這里簡單打印
            Header[] headers = postMethod.getResponseHeaders();
           /* for (Header h: headers){
                System.out.println(h.getName() + "---------------" + h.getValue());
            }*/
            //讀取HTTP響應(yīng)內(nèi)容，這里簡單打印網(wǎng)頁內(nèi)容
            //讀取為字節(jié)數(shù)組
            byte[] responseBody = postMethod.getResponseBody();
            response = new String(responseBody, charset);
            System.out.println("接口返回?cái)?shù)據(jù)為：" + response);
            //讀取為InputStream，在網(wǎng)頁內(nèi)容數(shù)據(jù)量大時(shí)候推薦使用
            //InputStream response = getMethod.getResponseBodyAsStream();
            return response;
        } catch (HttpException e) {
            //發(fā)生致命的異常，可能是協(xié)議不對(duì)或者返回的內(nèi)容有問題
            System.out.println("請(qǐng)檢查輸入的URL!");
            e.printStackTrace();
            return "調(diào)用POST請(qǐng)求失敗";
        } catch (IOException e){
            //發(fā)生網(wǎng)絡(luò)異常
            System.out.println("發(fā)生網(wǎng)絡(luò)異常!");
            e.printStackTrace();
            return "調(diào)用POST請(qǐng)求失敗";
        }finally {
            /**
             * 6.釋放連接
             */
            postMethod.releaseConnection();
        }
    }

//post請(qǐng)求示例
String result = HttpClientToInterface.doPost("http://127.0.0.1:8085/xxxx/xxxx?yy=yyyyyy&zz=zzzzzzz","UTF-8");

POST請(qǐng)求（JSON傳參）

public static String doPost(String url, JSONObject json){
        try {
            CloseableHttpClient httpClient = HttpClientBuilder.create().build();
            HttpPost post = new HttpPost(url);

            // 首先Header部分需要設(shè)定字符集為：uft-8
            post.addHeader("Content-Type", "application/json;charset=utf-8");
            // 此處也需要設(shè)定
            post.setHeader("Accept", "*/*");
            post.setHeader("Accept-Encoding", "gzip, deflate, br");
//            post.setHeader("Accept-Language", "zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
            post.setHeader("Connection", "keep-alive");
            post.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36");
            post.setEntity(new StringEntity(json.toString(), Charset.forName("UTF-8"))); //設(shè)置請(qǐng)求參數(shù)
            HttpResponse response = httpClient.execute(post);
            int statusCode = response.getStatusLine().getStatusCode();
            if (HttpStatus.SC_OK == statusCode){
                //返回String
                String res = EntityUtils.toString(response.getEntity());
                System.out.println(res);
                return res;
            }else{
                return "調(diào)用POST請(qǐng)求失敗";
            }

        } catch (Exception e) {
            e.printStackTrace();
            return "調(diào)用POST請(qǐng)求失敗";
        }
    }

//post請(qǐng)求示例-josn傳參
 Map<String, Object> map = new HashMap<>();
 map.put("xxxx", "xxxxxx");
 map.put("xxxxx", "xxxxxx");
 JSONObject json = new JSONObject(map);

//以post形式請(qǐng)求接口
 String result = HttpClientToInterface.doPost("http://127.0.0.1:8085/xxxx/xxxxx/", json);
 JSONObject jsonObject = JSONObject.parseObject(result);
 String data = jsonObject.get("data").toString();

PUT請(qǐng)求（傳TOKEN）

public static String doPut(String url,String token){
        try (CloseableHttpClient httpclient = HttpClients.createDefault()) {
            HttpPut httpPut = new HttpPut(url);
            //設(shè)置編碼 , 設(shè)置token參數(shù)
            httpPut.addHeader("Authentication", token);
            // 首先Header部分需要設(shè)定字符集為：uft-8
            httpPut.addHeader("Content-Type", "application/json;charset=utf-8");
            // 此處也需要設(shè)定
            httpPut.setHeader("Accept", "*/*");
            httpPut.setHeader("Accept-Encoding", "gzip, deflate, br");
//            post.setHeader("Accept-Language", "zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3");
            httpPut.setHeader("Connection", "keep-alive");
            httpPut.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.97 Safari/537.36");
            //設(shè)置請(qǐng)求參數(shù)

            System.out.println("Executing request " + httpPut.getRequestLine());

            // Create a custom response handler
            ResponseHandler<String> responseHandler = response -> {
                int status = response.getStatusLine().getStatusCode();
                if (status >= 200 && status < 300) {
                    HttpEntity entity = response.getEntity();
                    return entity != null ? EntityUtils.toString(entity) : null;
                } else {
                    throw new ClientProtocolException("Unexpected response status: " + status);
                }
            };
            String responseBody = httpclient.execute(httpPut, responseHandler);
            System.out.println("接口返回?cái)?shù)據(jù)為："+responseBody);
            return responseBody;
        } catch (IOException e) {
            e.printStackTrace();
            return "調(diào)用PUT請(qǐng)求失敗";
        }
    }

//put請(qǐng)求示例
String result = HttpClientToInterface.doPut("http://127.0.0.1：8085/xxxx/xxxxx", token);

總結(jié)

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