java后端获取支付宝的基本信息
app绑定支付宝其实大部分都是由后端来完成的，绑定支付宝总共需要三步第一步public static String querySign() {String token=System.currentTimeMillis()+new Random().nextInt()+"";String targetId=null;try {MessageDigest md=MessageDigest.getInstance("md5");byte[] md5=md.digest(token.getBytes());BASE64Encoder base64Encoder = new BASE64Encoder();targetId = base64Encoder.encode(md5);System.out.println(targetId);} catch (NoSuchAlgorithmException e) {e.printStackTrace();}StringBuffer asd=new StringBuffer();SortedMap<String,String > map = new TreeMap<String,String >();map.put("apiname","com.alipay.account.auth");map.put("method","alipay.open.auth.sdk.code.get");map.put("app_id", APP_ID);map.put("app_name","app名称");map.put("biz_type","openservice");map.put("pid","app的pid");map.put("product_id","APP_FAST_LOGIN");map.put("scope","kuaijie");map.put("target_id",targetId);map.put("auth_type","AUTHACCOUNT");map.put("sign_type","RSA");String signStr = AlipaySignature.getSignContent(map);String sign = null;try {sign = AlipaySignature.rsaSign(signStr,APP_PRIVATE_KEY, CHARSET);String s=PayUtil.getSignEncodeUrl(map,true) + "&sign=" + URLEncoder.encode(sign,CHARSET);String s1 = map.toString();String replace = s1.replace(", ","&");return replace.substring(1,replace.length()-1)+s;} catch (AlipayApiException e) {e.printStackTrace();return "";} catch (UnsupportedEncodingException e) {e.printStackTrace();return "";}}
这一步执行成功后会返回
apiname=com.alipay.account.auth& app_id=*******& app_name=*****& auth_type=AUTHACCOUNT& biz_type=openservice& method=alipay.open.auth.sdk.code.get& pid=*******& product_id=APP_FAST_LOGIN& scope=kuaijie& sign_type=RSA& target_id=7UC8vDI78pXKaJLGKVTIJg==&sign=ZirsWxWPq9T6RvV65W9Vh1%2BEU1%2FywcSfz3HU4XlNb%2BLHY4LbhJ15%%2B1z0J%2F4yYBwxq4ehIodZdaxfwl8JXmA0hZlDNSERsMXWmDUUETE0gLAhFkKFJNO18928envJf%2B52vRaUNghvubxmILQ4UhIl2hLNnpKX8mxRZ3deAno1bCrs2E5Mfh8OC4CHSOUGtTWwPvlG0jDn9DrwY2kxpQ7VIrBKvKokyI7uTt5zBeZpWZA%3D%3D
app端（安卓，ios）都可以，拿这个数据与支付宝进行交互，来获取auth_code
第二步，拿auth_code与支付宝交互，来换取auth_token。
APP_PRIVATE_KEY 是支付宝公钥，上传应用私钥到支付宝平台支付宝自动生成
public static JSONObject findAuthToken(String auth_code) {AlipayClient alipayClient = new DefaultAlipayClient("/gateway.do", APP_ID, APP_PRIVATE_KEY, "json", CHARSET, ALIPAY_PUBLIC_KEY, "RSA2");AlipaySystemOauthTokenRequest request = new AlipaySystemOauthTokenRequest();request.setCode(auth_code);request.setGrantType("authorization_code");try {AlipaySystemOauthTokenResponse oauthTokenResponse = alipayClient.execute(request);return findUserInfo(oauthTokenResponse.getAccessToken());} catch (AlipayApiException e) {//处理异常e.printStackTrace();}return null;}
第三步，用auth_token交换用户的基本信息（不包括用户的手机号，用户账号）
public static JSONObject findUserInfo(String authToken){AlipayClient alipayClient = new DefaultAlipayClient("/gateway.do", APP_ID, APP_PRIVATE_KEY, "json", CHARSET, ALIPAY_PUBLIC_KEY, "RSA2");AlipayUserInfoShareRequest request = new AlipayUserInfoShareRequest();try {AlipayUserInfoShareResponse userinfoShareResponse = alipayClient.execute(request, "kuaijieB9eb8d912d2694957bf01d710b5bf5X69");String body = userinfoShareResponse.getBody();return JSONObject.parseObject(body);} catch (AlipayApiException e) {//处理异常e.printStackTrace();return null;}}
看了支付宝的官方文档也米看明白，最后在网上找到一篇帖子
地址 /bddiudiu/blog/834607
希望帮助到大家。
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