支付寶APP支付完成後臺回撥示例-java

阿新 • • 發佈：2019-01-14

支付寶在APP支付完成後，需要支付寶主動呼叫notify_url進行業務的處理。當支付寶通知失敗後，會不斷的發起通知，知道通知成功，這樣保證了業務的正常執行。程式碼如下（後臺回撥程式碼）：

1、下載支付寶的sdk。（在我的資源中有上傳）

2、實現程式碼（共6個類）：AlipayConfig(配置類)、AlipayController（介面類）、AlipayCore、AlipayNotify、Base64、RSA後四個類都為支付寶自帶的實現類。

package com.alice.app.controller.notify.alipay;

/* *
*類名：AlipayConfig
*功能：基礎配置類
*詳細：設定帳戶有關資訊及返回路徑
*版本：3.3
*日期：2012-08-10
*說明：
*/

public class AlipayConfig {
// 合作身份者ID，簽約賬號，以2088開頭由16位純數字組成的字串，檢視地址：https://b.alipay.com/order/pidAndKey.htm
public static String partner = "xxxxxxxxxxxxxxxx";

//商戶的私鑰,需要PKCS8格式，RSA公私鑰生成：https://doc.open.alipay.com/doc2/detail.htm?spm=a219a.7629140.0.0.nBDxfy&treeId=58&articleId=103242&docType=1
public static String private_key = "xxxxxxx";
//沙箱環境
//public static String private_key="xxxxxxxxx" ;

// 收款支付寶賬號，以2088開頭由16位純數字組成的字串，一般情況下收款賬號就是簽約賬號
public static String seller_id = "xxxxxxxxxxxxx" ;

// 支付寶的公鑰,檢視地址：https://b.alipay.com/order/pidAndKey.htm
public static String alipay_public_key = "xxxxxxxxxxxxxxxx";

// 除錯用，建立TXT日誌資料夾路徑
public static String log_path = "D:\\";

// 字元編碼格式目前支援 gbk 或 utf-8
public static String input_charset = "utf-8";

// 簽名方式不需修改
public static String sign_type = "RSA";

// 支付型別，無需修改
public static String payment_type = "1";

// 呼叫的介面名，無需修改
public static String service = "create_direct_pay_by_user";

public static String notify_url = "http://xxxxxxxx/xxxxxxx/notify/payNotify" ;
}

import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/notify")
public class AlipayController {
@RequestMapping(value = { "/getPayNotify" }, method = { RequestMethod.POST })
@ResponseBody
public String getPayNotify(HttpServletRequest request) throws Exception {
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] + ",";
}
//亂碼解決，這段程式碼在出現亂碼時使用。如果mysign和sign不相等也可以使用這段程式碼轉化
//valueStr = new String(valueStr.getBytes("ISO-8859-1"), "gbk");
params.put(name, valueStr);
}

//獲取支付寶的通知返回引數，可參考技術文件中頁面跳轉同步通知引數列表(以下僅供參考)//
//商戶訂單號
String out_trade_no = new String(request.getParameter("out_trade_no").getBytes("ISO-8859-1"),"UTF-8");

//支付寶交易號
String trade_no = new String(request.getParameter("trade_no").getBytes("ISO-8859-1"),"UTF-8");

//交易狀態
String trade_status = new String(request.getParameter("trade_status").getBytes("ISO-8859-1"),"UTF-8");

//非同步通知ID
String notify_id=request.getParameter("notify_id");

//sign
String sign=request.getParameter("sign");

if(notify_id!=""&&notify_id!=null){
if(AlipayNotify.verifyResponse(notify_id).equals("true"))//判斷成功之後使用getResponse方法判斷是否是支付寶發來的非同步通知。
{
if(AlipayNotify.getSignVeryfy(params, sign))//使用支付寶公鑰驗籤
{
if(trade_status.equals("TRADE_FINISHED") || trade_status.equals("TRADE_SUCCESS")){
//業務處理
}

return "success" ;
}
else//驗證簽名失敗
{
return "sign fail" ;
}
}
else//驗證是否來自支付寶的通知失敗
{
return "response fail" ;
}
}
else{
return "no notify message" ;
}
}
}

import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class AlipayCore {
/**
* 除去陣列中的空值和簽名引數
* @param sArray 簽名引數組
* @return 去掉空值與簽名引數後的新簽名引數組
*/
public static Map<String, String> paraFilter(Map<String, String> sArray) {

Map<String, String> result = new HashMap<String, String>();

if (sArray == null || sArray.size() <= 0) {
return result;
}

for (String key : sArray.keySet()) {
String value = sArray.get(key);
if (value == null || value.equals("") || key.equalsIgnoreCase("sign")
|| key.equalsIgnoreCase("sign_type")) {
continue;
}
result.put(key, value);
}

return result;
}

/**
* 把陣列所有元素，並按照“引數=引數值”的模式用“&”字元拼接成字串
* @param params 需要參與字元拼接的引數組
* @param sorts 是否需要排序 true 或者 false
* @return 拼接後字串
*/
public static String createLinkString(Map<String, String> params) {

List<String> keys = new ArrayList<String>(params.keySet());

Collections.sort(keys);

String prestr = "";

for (int i = 0; i < keys.size(); i++) {
String key = keys.get(i);
String value = params.get(key);

if (i == keys.size() - 1) {//拼接時，不包括最後一個&字元
prestr = prestr + key + "=" + value;
} else {
prestr = prestr + key + "=" + value + "&";
}
}

return prestr;
}

/**
* 寫日誌，方便測試（看網站需求，也可以改成把記錄存入資料庫）
* @param sWord 要寫入日誌裡的文字內容
*/
public static void logResult(String sWord,String filename) {
FileWriter writer = null;
try {
writer = new FileWriter(AlipayConfig.log_path + "alipay_log_" + System.currentTimeMillis()+filename+".txt");
writer.write(sWord);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (writer != null) {
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Map;

public class AlipayNotify {

/**
* 支付寶訊息驗證地址
*/
private static final String HTTPS_VERIFY_URL = "https://mapi.alipay.com/gateway.do?service=notify_verify&";

/**
* 根據反饋回來的資訊，生成簽名結果
* @param Params 通知返回來的引數陣列
* @param sign 比對的簽名結果
* @return 生成的簽名結果
*/
public static boolean getSignVeryfy(Map<String, String> Params, String sign) {
//過濾空值、sign與sign_type引數
Map<String, String> sParaNew = AlipayCore.paraFilter(Params);
//獲取待簽名字串
String preSignStr = AlipayCore.createLinkString(sParaNew);
//獲得簽名驗證結果
boolean isSign = false;
if(AlipayConfig.sign_type.equals("RSA")){
isSign = RSA.verify(preSignStr, sign, AlipayConfig.alipay_public_key, AlipayConfig.input_charset);
}
return isSign;
}

/**
* 獲取遠端伺服器ATN結果,驗證返回URL
* @param notify_id 通知校驗ID
* @return 伺服器ATN結果
* 驗證結果集：
* invalid命令引數不對出現這個錯誤，請檢測返回處理中partner和key是否為空
* true 返回正確資訊
* false 請檢查防火牆或者是伺服器阻止埠問題以及驗證時間是否超過一分鐘
*/
public static String verifyResponse(String notify_id) {
//獲取遠端伺服器ATN結果，驗證是否是支付寶伺服器發來的請求

String partner = AlipayConfig.partner;
String veryfy_url = HTTPS_VERIFY_URL + "partner=" + partner + "&notify_id=" + notify_id;

return checkUrl(veryfy_url);
}

/**
* 獲取遠端伺服器ATN結果
* @param urlvalue 指定URL路徑地址
* @return 伺服器ATN結果
* 驗證結果集：
* invalid命令引數不對出現這個錯誤，請檢測返回處理中partner和key是否為空
* true 返回正確資訊
* false 請檢查防火牆或者是伺服器阻止埠問題以及驗證時間是否超過一分鐘
*/
public static String checkUrl(String urlvalue) {
String inputLine = "";

try {
URL url = new URL(urlvalue);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection
.getInputStream()));
inputLine = in.readLine().toString();
} catch (Exception e) {
e.printStackTrace();
inputLine = "";
}

return inputLine;
}
}

public final class Base64 {

static private final int BASELENGTH = 128;
static private final int LOOKUPLENGTH = 64;
static private final int TWENTYFOURBITGROUP = 24;
static private final int EIGHTBIT = 8;
static private final int SIXTEENBIT = 16;
static private final int FOURBYTE = 4;
static private final int SIGN = -128;
static private final char PAD = '=';
static private final boolean fDebug = false;
static final private byte[] base64Alphabet = new byte[BASELENGTH];
static final private 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;
if (fDebug) {
System.out.println("number of triplets = " + numberTriplets);
}

for (int i = 0; i < numberTriplets; i++) {
b1 = binaryData[dataIndex++];
b2 = binaryData[dataIndex++];
b3 = binaryData[dataIndex++];

if (fDebug) {
System.out.println("b1= " + b1 + ", b2= " + b2 + ", b3= " + b3);
}

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);

if (fDebug) {
System.out.println("val2 = " + val2);
System.out.println("k4 = " + (k << 4));
System.out.println("vak = " + (val2 | (k << 4)));
}

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 groups
if (fewerThan24bits == EIGHTBIT) {
b1 = binaryData[dataIndex];
k = (byte) (b1 & 0x03);
if (fDebug) {
System.out.println("b1=" + b1);
System.out.println("b1<<2 = " + (b1 >> 2));
}
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 spaces
int 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 null

b1 = 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 characters
if (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 3cQl
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);

}

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 whitespace
int newSize = 0;
int len = data.length;
for (int i = 0; i < len; i++) {
if (!isWhiteSpace(data[i])) {
data[newSize++] = data[i];
}
}
return newSize;
}
}

import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;

public class RSA{

public static final String SIGN_ALGORITHMS = "SHA1WithRSA";

/**
* RSA簽名
* @param content 待簽名資料
* @param privateKey 商戶私鑰
* @param input_charset 編碼格式
* @return 簽名值
*/
public static String sign(String content, String privateKey, String input_charset)
{
try
{
PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec( Base64.decode(privateKey) );
KeyFactory keyf = KeyFactory.getInstance("RSA");
PrivateKey priKey = keyf.generatePrivate(priPKCS8);

java.security.Signature signature = java.security.Signature
.getInstance(SIGN_ALGORITHMS);

signature.initSign(priKey);
signature.update( content.getBytes(input_charset) );

byte[] signed = signature.sign();

return Base64.encode(signed);
}
catch (Exception e)
{
e.printStackTrace();
}

return null;
}

/**
* RSA驗簽名檢查
* @param content 待簽名資料
* @param sign 簽名值
* @param alipay_public_key 支付寶公鑰
* @param input_charset 編碼格式
* @return 布林值
*/
public static boolean verify(String content, String sign, String alipay_public_key, String input_charset)
{
try
{
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
byte[] encodedKey = Base64.decode(alipay_public_key);
PublicKey pubKey = keyFactory.generatePublic(new X509EncodedKeySpec(encodedKey));

java.security.Signature signature = java.security.Signature
.getInstance(SIGN_ALGORITHMS);

signature.initVerify(pubKey);
signature.update( content.getBytes(input_charset) );

boolean bverify = signature.verify( Base64.decode(sign) );
return bverify;

}
catch (Exception e)
{
e.printStackTrace();
}

return false;
}
}

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