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paypal支付標準按鈕(from表單)整合

1.簡介                                                   

  PayPal是倍受全球億萬使用者追捧的國際貿易支付工具,即時支付,即時到賬,全中文操作介面,能通過中國的本地銀行輕鬆提現,解決外貿收款難題,助您成功開展海外業務,決勝全球。註冊PayPal後就可立即開始接受信用卡付款。作為線上付款服務商,PayPal是您向全世界近2.54億的使用者敞開大門的最快捷的方式。最大的好處是,註冊完全免費!集國際流行的信用卡,借記卡,電子支票等支付方式於一身。幫助買賣雙方解決各種交易過程中的支付難題。PayPal是名副其實的全球化支付平臺,服務範圍超過200個市場,支援的幣種超過100個。在跨國交易中,將近70%的線上跨境買家更喜歡用PayPal支付海外購物款項。

  PayPal提供了多種支付方式

  • 標準支付
  • 快速支付
  • 其中標準支付譽為最佳實踐。

  注意:paypal支付國內賬號不能付款給國內賬號

2.PayPal的相關URL                                            

  正式網址https://www.paypal.com/

  沙箱(開發者)網址https://developer.paypal.com/

  沙箱(測試使用者)登入地址https://www.sandbox.paypal.com/

  技術支援地址(paypal開發人員)https://www.paypal-support.com/s/account-overview

  官方文件

  • 付款按鈕資料:https://developer.paypal.com/docs/integration/web/
  • IPN(支付回撥)資料:https://developer.paypal.com/docs/api-basics/notifications/ipn/ht-ipn/
  • PDT(資料傳輸)資料:https://developer.paypal.com/docs/api-basics/notifications/payment-data-transfer/#get-started

3.整合步驟                                                 

  1、在paypal頁面建立Buttons(PayPal付款按鈕)並複製程式碼到專案

  2、使用者點選支付按鈕

  3、進入PayPal支付頁面

  4、使用者登入後確認支付

  5、顯示支付成功資訊

4.整合步驟實現                                               

(1)註冊賬號                                                

  在PayPal正式網站https://www.paypal.com中註冊一個賬號,如果公司沒有給你相關資訊的話,先註冊一個個人賬號也是一樣的。

(2)進入開發者介面建立相關資訊                                      

  1、在開發者平臺https://developer.paypal.com/,登入剛建立的賬號

  2、登入成功後,選擇:SANBOX下的Accounts標籤

  3、建立個人賬號和商家賬號用於測試沙箱環境

(3)建立按鈕                                                

  1、在PayPal沙箱測試賬號網站https://www.sandbox.paypal.com/登入剛剛建立的沙箱商家賬號

  2、建立支付按鈕

(4)PDT令牌獲取                                              

(5)IPN回撥亂碼處理                                            

(6)示例程式碼                                                

  控制器程式碼如下

@Controller
@RequestMapping("/paypalC")
public class PaypalC {

    @Autowired
    private PaypalS paypalS;

    //TODO 標準付款按鈕整合
    /**交易取消
     */
    @RequestMapping(method = RequestMethod.GET, value = "cancel")
    public String cancel(){
        return "b2/paypal/cancel";
    }
    
    /**獲取標準付款頁面
     */
    @RequestMapping(method = RequestMethod.GET, value = "standardPayment", produces="text/html;charset=UTF-8")
    public String standardPayment(){
        return "b2/paypal/standardPayment";
    }
    
    /**PDT立即回撥(由使用者在paypal點選返回商家網站時呼叫,不點選則不會呼叫,含跳轉路徑)
     */
    @RequestMapping(value = "pdtWebhooks", produces="text/html;charset=UTF-8")
    public String pdtWebhooks(HttpServletRequest req, HttpServletResponse resp){
        return paypalS.pdtWebhooks(req, resp);
    }
    
    /**IPN回撥(由paypal支付成功後呼叫,最多重複呼叫15次)
     */
    @ResponseBody
    @RequestMapping(method = RequestMethod.POST, value = "ipnWebhooks", produces="text/html;charset=UTF-8")
    public String ipnWebhooks(HttpServletRequest req, HttpServletResponse resp) {
        return paypalS.ipnWebhooks(req, resp);
    }
}
View Code

  業務層程式碼如下

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import org.springframework.stereotype.Service;
import com.grt.b2.method.PaypalUtils;
import com.grt.v3.method.OUtils;

/**Paypal支付service類
 */
@Service
public class PaypalS {
    //TODO 標準付款按鈕整合
    /**PDT立即回撥(由使用者在paypal點選返回商家網站時呼叫,不點選則不會呼叫,含跳轉路徑)
     */
    public String pdtWebhooks(HttpServletRequest req, HttpServletResponse resp) {
        String tx = req.getParameter("txn_id");//訂單id
        String stringRes = PaypalUtils.getPDTWebHooks(tx);
        if(!OUtils.isEmpty(stringRes)){
            String[] res = stringRes.split("\\r?\\n");
            if("SUCCESS".equals(res[0])){
                System.out.println("驗證PDT資料成功,進行訂單入庫");
                Map<String, String> data = new HashMap<String, String>();
                for (String str : res) {
                    if(str.indexOf("=") > 0){
                        String[] s = str.split("=");
                        data.put(s[0], s.length > 1 ? s[1] : "");
                    }
                }
                return "b2/paypal/success";
            }
        }
        return "b2/paypal/failure";
    }
    
    /**IPN回撥(由paypal支付成功後呼叫,最多重複呼叫15次)
     */
    @SuppressWarnings("unchecked")
    public String ipnWebhooks(HttpServletRequest req, HttpServletResponse resp) {
        //1.獲取ipn傳遞的資料
        Map<String, String> data = new HashMap<String, String>();
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("cmd", "_notify-validate"));
        Enumeration<String> e = req.getParameterNames();
        while(e.hasMoreElements()){
            String name = e.nextElement();
            String value = req.getParameter(name);
            params.add(new BasicNameValuePair(name, value));
            data.put(name, value);
        }
        //2.把ipn傳遞資料傳送給paypal並獲取返回資料進行驗證
        String res = PaypalUtils.getIPNWebHooks(params);
        System.out.println("IPN資料\n"+res);
        if ("VERIFIED".equals(res)) {//驗證IPN回撥資料成功
            System.out.println("驗證IPN回撥資料成功,進行訂單入庫");
        }else if("INVALID".equals(res)) {//驗證IPN回撥資料失敗
            System.out.println("驗證IPN回撥資料失敗,進行日誌記錄");
        }else{//驗證IPN回撥資料異常
            System.out.println("驗證IPN回撥資料異常,進行日誌記錄");
        }
        return "";
    }
}
View Code

  PayPal工具類如下

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.http.Consts;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import com.grt.michael.method.tigo.HttpsUtils;
import com.grt.v3.method.OUtils;

/**Paypal支付工具類
 */
public class PaypalUtils {
    //TODO 標準付款按鈕整合
    private static final String SANDBOX_URL = "https://www.sandbox.paypal.com/cgi-bin/webscr";
    private static final String LIVE_URL = "https://www.paypal.com/cgi-bin/webscr";
    private static final String pdt_key = "";//PDT金鑰,需要自己去paypal拿
    /**獲取PDT驗證資料
     */
    public static String getPDTWebHooks(String tx){
        Map<String, String> headers = new HashMap<String, String>();
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        headers.put("Content-Type", "application/x-www-form-urlencoded");
        params.add(new BasicNameValuePair("cmd", "_notify-synch"));
        params.add(new BasicNameValuePair("tx", tx));
        params.add(new BasicNameValuePair("at", pdt_key));
        String result = sendPost(SANDBOX_URL, headers, params);
        if(!OUtils.isEmpty(result))
            return URLDecoderString(result);
        return result;
    }
    /**獲取IPN驗證資料
     */
    public static String getIPNWebHooks(List<NameValuePair> params){
        Map<String, String> headers = new HashMap<String, String>();
        headers.put("Content-Type", "application/x-www-form-urlencoded");
        return sendPost(SANDBOX_URL, headers, params);
    }
    /**URL編碼解碼
     */
    public static String URLDecoderString(String str) {
        String result = "";
        try {
            result = java.net.URLDecoder.decode(str, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return result;
    }
    /**post請求方法
     */
    private static String sendPost(String url, Map<String, String> headers, List<NameValuePair> params) {
        String resultData = null;
        try{
            CloseableHttpClient http = HttpsUtils.getHttpClient();
            HttpPost httpost = new HttpPost(url);
            //設定header
            if (headers != null && headers.size() > 0) {
                for (Map.Entry<String, String> entry : headers.entrySet()) {
                    httpost.setHeader(entry.getKey(), entry.getValue());
                }
            }
            //組織請求引數
             if (params != null && params.size() > 0) {
                 httpost.setEntity(new UrlEncodedFormEntity(params, Consts.UTF_8));
             }
            // 執行結果
            for (int i = 0; i < 3; i++) {
                try {
                    HttpResponse res = http.execute(httpost);
                    if (res.getStatusLine().getStatusCode() != 200)
                        continue;
                    resultData = EntityUtils.toString(res.getEntity());
                    return resultData;
                } catch (IOException e) {
                    e.printStackTrace();
                    continue;
                } finally {
                    httpost.releaseConnection();
                }
            }
        }catch (Exception e) {
            e.printStackTrace();
        }
        return resultData;
    }
}
View Code

  HttpUtils工具類(httpclient-4.5.jar、httpcore-4.4.1.jar)如下

import org.apache.commons.collections.MapUtils;
import org.apache.http.*;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class HttpsUtils {
    private static final String HTTP = "http";
    private static final String HTTPS = "https";
    private static SSLConnectionSocketFactory sslsf = null;
    private static PoolingHttpClientConnectionManager cm = null;
    private static SSLContextBuilder builder = null;
    static {
        try {
            builder = new SSLContextBuilder();
            // 全部信任 不做身份鑑定
            builder.loadTrustMaterial(null, new TrustStrategy() {
                @Override
                public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
                    return true;
                }
            });
            sslsf = new SSLConnectionSocketFactory(builder.build(), new String[] { "SSLv2Hello", "SSLv3", "TLSv1", "TLSv1.2" }, null, NoopHostnameVerifier.INSTANCE);
            Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory> create().register(HTTP, new PlainConnectionSocketFactory()).register(HTTPS, sslsf).build();
            cm = new PoolingHttpClientConnectionManager(registry);
            cm.setMaxTotal(200);// max connection
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * httpClient post請求
     * 
     * @param url
     *            請求url
     * @param header
     *            頭部資訊
     * @param param
     *            請求引數 form提交適用
     * @param entity
     *            請求實體 json/xml提交適用
     * @return 可能為空 需要處理
     * @throws Exception
     * 
     */
    public static String doGet(String url) throws Exception {
        String result = "";
        CloseableHttpClient httpClient = null;
        try {
            httpClient = getHttpClient();
            HttpGet httpGet = new HttpGet(url);
            RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(30000).setConnectTimeout(30000).build();// 設定請求和傳輸超時時間
            httpGet.setConfig(requestConfig);
            HttpResponse httpResponse = httpClient.execute(httpGet);
            int statusCode = httpResponse.getStatusLine().getStatusCode();
            if (statusCode == HttpStatus.SC_OK) {
                HttpEntity resEntity = httpResponse.getEntity();
                result = EntityUtils.toString(resEntity);
            } else {
                readHttpResponse(httpResponse);
            }
        } catch (Exception e) {
            throw e;
        } finally {
            if (httpClient != null) {
                httpClient.close();
            }
        }
        return result;
    }

    /**
     * httpClient post請求
     * 
     * @param url
     *            請求url
     * @param header
     *            頭部資訊
     * @param param
     *            請求引數 form提交適用
     * @param entity
     *            請求實體 json/xml提交適用
     * @return 可能為空 需要處理
     * @throws Exception
     * 
     */
    public static String doPost(String url, Map<String, String> header, Map<String, String> param, HttpEntity entity) throws Exception {
        String result = "";
        CloseableHttpClient httpClient = null;
        try {
            httpClient = getHttpClient();
            HttpPost httpPost = new HttpPost(url);
            // 設定頭資訊
            if (MapUtils.isNotEmpty(header)) {
                for (Map.Entry<String, String> entry : header.entrySet()) {
                    httpPost.addHeader(entry.getKey(), entry.getValue());
                }
            }
            // 設定請求引數
            if (MapUtils.isNotEmpty(param)) {
                List<NameValuePair> formparams = new ArrayList<NameValuePair>();
                for (Map.Entry<String, String> entry : param.entrySet()) {
                    // 給引數賦值
                    formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                }
                UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
                httpPost.setEntity(urlEncodedFormEntity);
            }
            // 設定實體 優先順序高
            if (entity != null) {
                httpPost.setEntity(entity);
            }
            HttpGet httpGet = new HttpGet(url);
            HttpResponse httpResponse = httpClient.execute(httpGet);
            int statusCode = httpResponse.getStatusLine().getStatusCode();
            if (statusCode == HttpStatus.SC_OK) {
                HttpEntity resEntity = httpResponse.getEntity();
                result = EntityUtils.toString(resEntity);
            } else {
                readHttpResponse(httpResponse);
            }
        } catch (Exception e) {
            throw e;
        } finally {
            if (httpClient != null) {
                httpClient.close();
            }
        }
        return result;
    }

    public static CloseableHttpClient getHttpClient() throws Exception {
        CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).setConnectionManager(cm).setConnectionManagerShared(true).build();

        return httpClient;
    }

    public static String readHttpResponse(HttpResponse httpResponse) throws ParseException, IOException {
        StringBuilder builder = new StringBuilder();
        // 獲取響應訊息實體
        HttpEntity entity = httpResponse.getEntity();
        // 響應狀態
        builder.append("status:" + httpResponse.getStatusLine());
        builder.append("headers:");
        HeaderIterator iterator = httpResponse.headerIterator();
        while (iterator.hasNext()) {
            builder.append("\t" + iterator.next());
        }
        // 判斷響應實體是否為空
        if (entity != null) {
            String responseString = EntityUtils.toString(entity);
            builder.append("response length:" + responseString.length());
            builder.append("response content:" + responseString.replace("\r\n", ""));
        }
        return builder.toString();
    }
}
View Code

  paypal支付按鈕(standardPayment.html)程式碼如下

<html>
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
</head>
<body>
    <form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" target="_top">
    <input type="hidden" name="cmd" value="_xclick"><%--支付型別--%>
    <input type="hidden" name="business" value="[email protected]"><%--商家賬號--%>
    <input type="hidden" name="hosted_button_id" value="CWA2QSSG7CDBA"><%--按鈕id,由paypal生成--%>
    <input TYPE="hidden" name="charset" value="utf-8"><%--編碼--%>
    <input type="hidden" name="invoice" value="ABC123"><%--自定義訂單編號--%>
    <input type="hidden" name="item_name" value="Server服務開通"><%--商品名稱--%>
    <input type="hidden" name="item_number" value="1"><%--商品數量--%>
    <input type="hidden" name="amount" value="5.95"><%--商品價格--%>
    <input type="hidden" name="currency_code" value="USD"><%--貨幣--%>
    <input type="hidden" name="return" value=""><%--支付成功(PDT地址)--%>
    <input type="hidden" name="cancel_return" value=""><%--支付失敗頁面--%>
    <%-- <input type="hidden" name="notify_url" value="">回撥路徑(IPN地址) --%>
    <input type='hidden' name="no_shipping" value="1"><%--不要求客戶提供收貨地址--%>
    <input type="hidden" name="rm" value="2"><%--return有地址的話,必須指定這個引數--%>
    <input type="hidden" name="no_note" value="老子不想付款啊。。。。"><%--付款說明--%>
    <input type="hidden" name="image_url" value="https://www.paypal.com/zh_XC/i/btn/btn_buynow_SM.gif"><%--圖片--%>
    <input type="hidden" name="custom" value="admin"><%--自定義變數傳遞伺服器需要資訊--%>
    <input type="image" src="https://www.sandbox.paypal.com/zh_XC/i/btn/btn_buynow_SM.gif" border="0" name="submit" alt="PayPal——最安全便捷的線上支付方式!">
    <img alt="" border="0" src="https://www.sandbox.paypal.com/zh_XC/i/scr/pixel.gif" width="1" height="1">
</form>
</body>
</html>
View Code

  cancel.html程式碼如下

<html>
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
</head>
<body>
    <h1>使用者取消支付...</h1>
</body>
</html>
View Code

  success.html程式碼如下

<html>
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
</head>
<body>
    <h1>使用者支付成功</h1>
</body>
</html>
View Code

  failure.html程式碼如下

<html>
<head>
<meta charset="UTF-8" />
<title>Insert title here</title>
</head>
<body>
    <h1>使用者支付失敗</h1>
</body>
</html>
View Code