Spring boot--支付宝APP支付安卓老版接口实现（含代码）

最近在做一些支付宝相关的支付后台实现，主要用的是Spring boot框架。因为支付宝老版的文档已经十分不详细（新版的也说的不清楚），所以我踩了无数坑，决定写篇博客来帮助后来人。

关于新版支付宝支付，需要APPID，也就是说必须在支付宝那儿建立应用并上线，还必须签约APP支付开通这个服务才能用。

但是本次我使用的是老版APP支付接口，所以并不需要APPID，只要签约支付宝开通APP支付服务就行。

关于流程，前端使用的是DCcloud的H5框架，集成了支付宝客户端SDK，整个流程如下：

用户点击支付按钮->客户端调用自己服务端API->自己服务端生成支付orderinfo（字符串）返回客户端->客户端拿orderinfo调用支付宝客户端SDK->SDK自启动支付宝APP完成支付->支付宝服务端给自己服务端发送异步通知->用户在异步通知验证支付成功后对自己数据库进行操作。

第一步：生成私钥公钥。这个可以用工具生成，需要去下载一键生成RSA密钥工具。下载地址：https://doc.open.alipay.com/docs/doc.htm?spm=a219a.7629140.0.0.pohUoc&treeId=291&articleId=106097&docType=1

第二步：在支付宝网站上上传你的公钥：

为防万一，请将开放平台密钥，mapi网关产品密钥，老版wap支付密钥全部配上你自己生成的公钥。

支付宝异步通知你的时候，请使用mapi网关产品密钥的支付宝公钥进行验证。

第三步：服务端如何生成orderinfo？不多说直接上代码：

package com.ibm.callcenter.controller;import com.alipay.api.AlipayApiException;import com.alipay.api.AlipayClient;import com.alipay.api.DefaultAlipayClient;import com.alipay.api.domain.AlipayTradeAppPayModel;import com.alipay.api.internal.util.AlipaySignature;import com.alipay.api.request.AlipayTradeAppPayRequest;import com.alipay.api.response.AlipayTradeAppPayResponse;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import com.ibm.callcenter.util.SignUtils;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.UnsupportedEncodingException;import java.net.URLEncoder;import java.text.SimpleDateFormat;import java.util.Date;import java.util.HashMap;import java.util.Iterator;import java.util.Map;@Controller@RequestMapping(value="/alipay")@ResponseBodypublic class test {        @RequestMapping(value = "/pay")        public String pay(//@RequestParam("fee") String total_fee,                            HttpServletResponse response1) {            Date now = new Date();            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");//可以方便地修改日期格式            String hehe = dateFormat.format( now );            System.out.println(hehe+"test123");            String out_strade_no=hehe+"wentest";   //自己写的订单编号            String private_key="写上你自己生成的与上传公钥相对应的私钥";            String partner="写上你自己的UID（PID）";            String seller_id="写上你支付宝收款的账号";            String body="aiyoubucuo";            String notify_url="写上你异步通知的接口地址，切记需要是外网地址";            String show_url="https://www.baidu.com/";  //支付宝同步跳转地址            String total_fee="0.01";  //支付金额            String subject="test";            String order="service=\"mobile.securitypay.pay\"&partner=\""+partner+"\"&_input_charset=\"UTF-8\"&out_trade_no=\""+out_strade_no+"\"&subject=\""+subject+"\"&payment_type=\"1\"&seller_id=\""+seller_id+"\"&total_fee=\""+total_fee+"\"&body=\""+body+"\"&it_b_pay=\"1d\"¬ify_url=\""+notify_url+"\"&show_url=\""+show_url+"\"";            String sign=SignUtils.sign(order,private_key,false);            try {                // 仅需对sign 做URL编码                sign = URLEncoder.encode(sign, "UTF-8");            } catch (UnsupportedEncodingException e) {                e.printStackTrace();            }            final String result = order + "&sign=\"" + sign + "\"&"                    + getSignType();            System.err.println("123"+result);            return result;        }    public String getSignType() {        return "sign_type=\"RSA\"";    }    /**     * 异步通知付款状态的Controller     * @param request     * @param response     * @return     */    @SuppressWarnings("rawtypes")    @RequestMapping(value="/notify",method = RequestMethod.POST )    public String notify(HttpServletRequest request,                        HttpServletResponse response) throws AlipayApiException {        Map<String,String> params = new HashMap<String,String>();        Map requestParams = request.getParameterMap();        for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) {            String name = (String) iter.next();            String[] values = (String[]) requestParams.get(name);            String valueStr = "";            for (int i = 0; i < values.length; i++) {                valueStr = (i == values.length - 1) ? valueStr + values[i]: valueStr + values[i] + ",";            }            params.put(name, valueStr);        }        String CHARSET = "UTF-8";        String ALIPAY_PUBLIC_KEY="写上你支付宝生成的公钥";        String tradeNo = request.getParameter("out_trade_no");        String tradeStatus = request.getParameter("trade_status");        //String notifyId = request.getParameter("notify_id");        //System.err.println(params.toString());        boolean flag = AlipaySignature.rsaCheckV1(params,ALIPAY_PUBLIC_KEY, CHARSET,"RSA");        if(flag){//验证成功            if(tradeStatus.equals("TRADE_FINISHED") || tradeStatus.equals("TRADE_SUCCESS")) {                //要写的逻辑。自己按自己的要求写//                log.error("ok.......");                System.err.println(">>>>>充值成功" + tradeNo);            }            return "success";        }else{//验证失败            System.out.println("fail yanzheng");            return "web/pay/fail";        }    }}

把生成签名的两个需要依赖的类也给大家：

package com.ibm.callcenter.util;import java.security.KeyFactory;import java.security.PrivateKey;import java.security.spec.PKCS8EncodedKeySpec;public class SignUtils {    private static final String ALGORITHM = "RSA";    private static final String SIGN_ALGORITHMS = "SHA1WithRSA";    private static final String SIGN_SHA256RSA_ALGORITHMS = "SHA256WithRSA";    private static final String DEFAULT_CHARSET = "UTF-8";    private static String getAlgorithms(boolean rsa2) {        return rsa2 ? SIGN_SHA256RSA_ALGORITHMS : SIGN_ALGORITHMS;    }    public static String sign(String content, String privateKey, boolean rsa2) {        try {            PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec(                    Base64.decode(privateKey));            KeyFactory keyf = KeyFactory.getInstance(ALGORITHM);            PrivateKey priKey = keyf.generatePrivate(priPKCS8);            java.security.Signature signature = java.security.Signature                    .getInstance(getAlgorithms(rsa2));            signature.initSign(priKey);            signature.update(content.getBytes(DEFAULT_CHARSET));            byte[] signed = signature.sign();            return Base64.encode(signed);        } catch (Exception e) {            e.printStackTrace();        }        return null;    }}

以及这个：

package com.ibm.callcenter.util;public final class Base64 {private static final int BASELENGTH = 128;private static final int LOOKUPLENGTH = 64;private static final int TWENTYFOURBITGROUP = 24;private static final int EIGHTBIT = 8;private static final int SIXTEENBIT = 16;private static final int FOURBYTE = 4;private static final int SIGN = -128;private static char PAD = '=';private static byte[] base64Alphabet = new byte[BASELENGTH];private static char[] lookUpBase64Alphabet = new char[LOOKUPLENGTH];static {for (int i = 0; i < BASELENGTH; ++i) {base64Alphabet[i] = -1;}for (int i = 'Z'; i >= 'A'; i--) {base64Alphabet[i] = (byte) (i - 'A');}for (int i = 'z'; i >= 'a'; i--) {base64Alphabet[i] = (byte) (i - 'a' + 26);}for (int i = '9'; i >= '0'; i--) {base64Alphabet[i] = (byte) (i - '0' + 52);}base64Alphabet['+'] = 62;base64Alphabet['/'] = 63;for (int i = 0; i <= 25; i++) {lookUpBase64Alphabet[i] = (char) ('A' + i);}for (int i = 26, j = 0; i <= 51; i++, j++) {lookUpBase64Alphabet[i] = (char) ('a' + j);}for (int i = 52, j = 0; i <= 61; i++, j++) {lookUpBase64Alphabet[i] = (char) ('0' + j);}lookUpBase64Alphabet[62] = (char) '+';lookUpBase64Alphabet[63] = (char) '/';}private static boolean isWhiteSpace(char octect) {return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);}private static boolean isPad(char octect) {return (octect == PAD);}private static boolean isData(char octect) {return (octect < BASELENGTH && base64Alphabet[octect] != -1);}/** * Encodes hex octects into Base64 *  * @param binaryData *            Array containing binaryData * @return Encoded Base64 array */public static String encode(byte[] binaryData) {if (binaryData == null) {return null;}int lengthDataBits = binaryData.length * EIGHTBIT;if (lengthDataBits == 0) {return "";}int fewerThan24bits = lengthDataBits % TWENTYFOURBITGROUP;int numberTriplets = lengthDataBits / TWENTYFOURBITGROUP;int numberQuartet = fewerThan24bits != 0 ? numberTriplets + 1: numberTriplets;char encodedData[] = null;encodedData = new char[numberQuartet * 4];byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;int encodedIndex = 0;int dataIndex = 0;for (int i = 0; i < numberTriplets; i++) {b1 = binaryData[dataIndex++];b2 = binaryData[dataIndex++];b3 = binaryData[dataIndex++];l = (byte) (b2 & 0x0f);k = (byte) (b1 & 0x03);byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2): (byte) ((b1) >> 2 ^ 0xc0);byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4): (byte) ((b2) >> 4 ^ 0xf0);byte val3 = ((b3 & SIGN) == 0) ? (byte) (b3 >> 6): (byte) ((b3) >> 6 ^ 0xfc);encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];}// form integral number of 6-bit groupsif (fewerThan24bits == EIGHTBIT) {b1 = binaryData[dataIndex];k = (byte) (b1 & 0x03);byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2): (byte) ((b1) >> 2 ^ 0xc0);encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];encodedData[encodedIndex++] = PAD;encodedData[encodedIndex++] = PAD;} else if (fewerThan24bits == SIXTEENBIT) {b1 = binaryData[dataIndex];b2 = binaryData[dataIndex + 1];l = (byte) (b2 & 0x0f);k = (byte) (b1 & 0x03);byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2): (byte) ((b1) >> 2 ^ 0xc0);byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4): (byte) ((b2) >> 4 ^ 0xf0);encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];encodedData[encodedIndex++] = PAD;}return new String(encodedData);}/** * Decodes Base64 data into octects *  * @param encoded *            string containing Base64 data * @return Array containind decoded data. */public static byte[] decode(String encoded) {if (encoded == null) {return null;}char[] base64Data = encoded.toCharArray();// remove white spacesint len = removeWhiteSpace(base64Data);if (len % FOURBYTE != 0) {return null;// should be divisible by four}int numberQuadruple = (len / FOURBYTE);if (numberQuadruple == 0) {return new byte[0];}byte decodedData[] = null;byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;char d1 = 0, d2 = 0, d3 = 0, d4 = 0;int i = 0;int encodedIndex = 0;int dataIndex = 0;decodedData = new byte[(numberQuadruple) * 3];for (; i < numberQuadruple - 1; i++) {if (!isData((d1 = base64Data[dataIndex++]))|| !isData((d2 = base64Data[dataIndex++]))|| !isData((d3 = base64Data[dataIndex++]))|| !isData((d4 = base64Data[dataIndex++]))) {return null;}// if found "no data" just return nullb1 = base64Alphabet[d1];b2 = base64Alphabet[d2];b3 = base64Alphabet[d3];b4 = base64Alphabet[d4];decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);}if (!isData((d1 = base64Data[dataIndex++]))|| !isData((d2 = base64Data[dataIndex++]))) {return null;// if found "no data" just return null}b1 = base64Alphabet[d1];b2 = base64Alphabet[d2];d3 = base64Data[dataIndex++];d4 = base64Data[dataIndex++];if (!isData((d3)) || !isData((d4))) {// Check if they are PAD charactersif (isPad(d3) && isPad(d4)) {if ((b2 & 0xf) != 0)// last 4 bits should be zero{return null;}byte[] tmp = new byte[i * 3 + 1];System.arraycopy(decodedData, 0, tmp, 0, i * 3);tmp[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);return tmp;} else if (!isPad(d3) && isPad(d4)) {b3 = base64Alphabet[d3];if ((b3 & 0x3) != 0)// last 2 bits should be zero{return null;}byte[] tmp = new byte[i * 3 + 2];System.arraycopy(decodedData, 0, tmp, 0, i * 3);tmp[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);tmp[encodedIndex] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));return tmp;} else {return null;}} else { // No PAD e.g 3cQlb3 = base64Alphabet[d3];b4 = base64Alphabet[d4];decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);}return decodedData;}/** * remove WhiteSpace from MIME containing encoded Base64 data. *  * @param data *            the byte array of base64 data (with WS) * @return the new length */private static int removeWhiteSpace(char[] data) {if (data == null) {return 0;}// count characters that's not whitespaceint newSize = 0;int len = data.length;for (int i = 0; i < len; i++) {if (!isWhiteSpace(data[i])) {data[newSize++] = data[i];}}return newSize;}}

代码与业务逻辑应该很清楚了。有不懂的同学可以评论问我，我再做补充。