微信統一下單_公眾號支付_掃碼支付
阿新 • • 發佈：2019-01-05
微信掃碼支付流程圖：https://pay.weixin.qq.com/wiki/doc/api/native_sl.php?chapter=6_5&index=4
微信公眾號支付流程圖：https://pay.weixin.qq.com/wiki/doc/api/jsapi_sl.php?chapter=7_4
微信掃碼支付，微信公眾號支付官方文件：https://pay.weixin.qq.com/wiki/doc/api/native_sl.php?chapter=9_1
微信官方demosdk：https://pay.weixin.qq.com/wiki/doc/api/jsapi_sl.php?chapter=11_1
微信掃碼支付，那段程式碼可以直接使用。
微信公眾號支付，需要前端配合。需要配置微信jsconfig。
微信jsapi配置官方文件：https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421141115
直接上程式碼
傳送請求工具類/** * * 微信支付 * */ public class WXPayService { // 統一下單URL private static String unifiedorder_url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; /** * 統一下單,公眾號支付 * * @param body 內容 * @param out_trade_no 訂單號 * @param total_fee 價格 * @param spbill_create_ip 使用者的IP地址 * @param notify_url 支付完成後通知路徑 * @param openid // 使用者的openId * * @throws Exception */ public Map<String, String> unifiedOrder(String body, String out_trade_no, String total_fee, String spbill_create_ip, String notify_url, String openid) throws Exception { // 請求引數 Map<String, String> param = new HashMap<String, String>(); param.put("appid", WXConstant.APPID); // 公眾賬號ID param.put("mch_id", WXConstant.MCH_ID); // 商戶號 param.put("nonce_str", WXPayUtil.generateNonceStr()); // param.put("body", body); // 內容(隨意填,具體參照微信官方文件) param.put("out_trade_no", out_trade_no); // 訂單號 param.put("total_fee", total_fee); // 支付價格.<注意：這裡的價格單位是分,必須是整數,不能帶小數點的> param.put("spbill_create_ip", spbill_create_ip); // IP地址 ַ param.put("notify_url", notify_url); // 通知路徑 param.put("trade_type", "JSAPI"); // JSAPI-微信公眾號支付 param.put("openid", openid); // 使用者的openId // 生成帶有 sign 的 XML 格式字串 String xmlparam = WXPayUtil.generateSignedXml(param, WXConstant.KEY); // 傳送請求 String resultStr = SendHttpRequest.sendPostRequest(unifiedorder_url, xmlparam); // 轉成MAP Map<String, String> wxResultMap = WXPayUtil.xmlToMap(resultStr); // 是否統一下單成功 if (wxResultMap.get("return_code").equals("SUCCESS") && wxResultMap.get("result_code").equals("SUCCESS")) { // 時間戳 String timeStamp = new Long(WXPayUtil.getCurrentTimestamp()).toString(); // 建立返回值 Map<String, String> resultMap = new HashMap<String, String>(); resultMap.put("appId", wxResultMap.get("appid")); resultMap.put("timeStamp", timeStamp); resultMap.put("nonceStr", wxResultMap.get("nonce_str")); resultMap.put("package", "prepay_id=" + wxResultMap.get("prepay_id")); resultMap.put("signType", "MD5"); // 生成簽名 String paySign = WXPayUtil.generateSignature(resultMap, WXConstant.KEY); resultMap.put("paySign", paySign); return resultMap; } else { throw new Exception("錯誤結果Map = " + wxResultMap.toString()); } } /** * 統一下單,掃碼支付 * * @param body 內容 * @param out_trade_no 訂單號 * @param total_fee 價格 * @param spbill_create_ip 使用者的IP地址 * @param notify_url 支付完成後通知路徑 * * @throws Exception */ public Map<String, String> unifiedOrder(String body, String out_trade_no, String total_fee, String spbill_create_ip, String notify_url) throws Exception { // 請求引數 Map<String, String> param = new HashMap<String, String>(); param.put("appid", WXConstant.APPID); // 公眾賬號ID param.put("mch_id", WXConstant.MCH_ID); // 商戶號 param.put("nonce_str", WXPayUtil.generateNonceStr()); // param.put("body", body); // 內容(隨意填,具體參照微信官方文件) param.put("out_trade_no", out_trade_no); // 訂單號 param.put("total_fee", total_fee); // 支付價格.<注意：這裡的價格單位是分,必須是整數,不能帶小數點的> param.put("spbill_create_ip", spbill_create_ip); // IP地址 ַ param.put("notify_url", notify_url); // 通知路徑 param.put("trade_type", "NATIVE"); // JSAPI-微信公眾號支付 // 生成帶有 sign 的 XML 格式字串 String xmlparam = WXPayUtil.generateSignedXml(param, WXConstant.KEY); // 傳送請求 String resultStr = SendHttpRequest.sendPostRequest(unifiedorder_url, xmlparam); // 轉成MAP Map<String, String> wxResultMap = WXPayUtil.xmlToMap(resultStr); // 返回 return wxResultMap; } }
import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; /** * 傳送http請求 * */ public class SendHttpRequest { /** * 傳送GET請求 * * @param url 請求地址 * @param param 請求引數(格式:key1=value1&key2=value2&key3=value3) * @return * @throws Exception */ public static String sendGetRequest(String url, String param) throws Exception { String result = ""; BufferedReader in = null; try { // 拼接URL和引數 String urlAndParam = url + "?" + param; // 建立URL物件 URL realUrl = new URL(urlAndParam); // 開啟URL的連結 URLConnection conn = realUrl.openConnection(); // 設定Head資訊 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); // 建立連結 conn.connect(); // 定義 BufferedReader輸入流來讀取URL的響應 in = new BufferedReader(new InputStreamReader(conn.getInputStream())); // 臨時引數 String line; // 獲取響應結果 while ((line = in.readLine()) != null) { result += line; } }catch(Exception e) { throw new Exception("請求失敗"); }finally { try { if (in != null) { in.close(); } } catch (Exception e2) { throw new Exception("請求失敗"); } } return result; } /** * 傳送POST請求 * * @param url 請求地址 * @param param 請求引數[格式:key1=value1&key2=value2 || JSON.toString()] * @return * @throws Exception */ public static String sendPostRequest(String url, String param) throws Exception { String result = ""; PrintWriter out = null; BufferedReader in = null; try { // 建立URL物件 URL realUrl = new URL(url); // 開啟URL的連結 URLConnection conn = realUrl.openConnection(); // 設定Head資訊 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); // POST請求設定 conn.setDoOutput(true); conn.setDoInput(true); // 獲取輸出流 out = new PrintWriter(conn.getOutputStream()); // 傳送請求引數 out.print(param); // flush輸出流的緩衝 out.flush(); // 獲取輸入流,讀取響應請求 in = new BufferedReader(new InputStreamReader(conn.getInputStream())); // 臨時引數 String line; // 獲取響應結果 while ((line = in.readLine()) != null) { result += line; } }catch(Exception e) { throw new Exception("請求失敗"); }finally { try { if (in != null) { in.close(); } } catch (Exception e2) { throw new Exception("請求失敗"); } } return result; } public static void main(String[] args) throws Exception { System.out.println(sendPostRequest("http://www.baidu.com", "")); } }
所用到的微信工具類(下面的工具類，是我將微信sdk中的程式碼直接拷貝出來的，所以僅供參考)
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.*;
import java.security.MessageDigest;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import com.wxsdk.WXPayConstants.SignType;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
public class WXPayUtil {
/**
* XML格式字串轉換為Map
*
* @param strXML XML字串
* @return XML資料轉換後的Map
* @throws Exception
*/
public static Map<String, String> xmlToMap(String strXML) throws Exception {
try {
Map<String, String> data = new HashMap<String, String>();
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
InputStream stream = new ByteArrayInputStream(strXML.getBytes("UTF-8"));
org.w3c.dom.Document doc = documentBuilder.parse(stream);
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getDocumentElement().getChildNodes();
for (int idx = 0; idx < nodeList.getLength(); ++idx) {
Node node = nodeList.item(idx);
if (node.getNodeType() == Node.ELEMENT_NODE) {
org.w3c.dom.Element element = (org.w3c.dom.Element) node;
data.put(element.getNodeName(), element.getTextContent());
}
}
try {
stream.close();
} catch (Exception ex) {
// do nothing
}
return data;
} catch (Exception ex) {
// WXPayUtil.getLogger().warn("Invalid XML, can not convert to map. Error message: {}. XML content: {}", ex.getMessage(), strXML);
throw ex;
}
}
/**
* 將Map轉換為XML格式的字串
*
* @param data Map型別資料
* @return XML格式的字串
* @throws Exception
*/
public static String mapToXml(Map<String, String> data) throws Exception {
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder= documentBuilderFactory.newDocumentBuilder();
org.w3c.dom.Document document = documentBuilder.newDocument();
org.w3c.dom.Element root = document.createElement("xml");
document.appendChild(root);
for (String key: data.keySet()) {
String value = data.get(key);
if (value == null) {
value = "";
}
value = value.trim();
org.w3c.dom.Element filed = document.createElement(key);
filed.appendChild(document.createTextNode(value));
root.appendChild(filed);
}
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
DOMSource source = new DOMSource(document);
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
transformer.transform(source, result);
String output = writer.getBuffer().toString(); //.replaceAll("\n|\r", "");
try {
writer.close();
}
catch (Exception ex) {
}
return output;
}
/**
* 生成帶有 sign 的 XML 格式字串
*
* @param data Map型別資料
* @param key API金鑰
* @return 含有sign欄位的XML
*/
public static String generateSignedXml(final Map<String, String> data, String key) throws Exception {
return generateSignedXml(data, key, SignType.MD5);
}
/**
* 生成帶有 sign 的 XML 格式字串
*
* @param data Map型別資料
* @param key API金鑰
* @param signType 簽名型別
* @return 含有sign欄位的XML
*/
public static String generateSignedXml(final Map<String, String> data, String key, SignType signType) throws Exception {
String sign = generateSignature(data, key, signType);
data.put(WXPayConstants.FIELD_SIGN, sign);
return mapToXml(data);
}
/**
* 判斷簽名是否正確
*
* @param xmlStr XML格式資料
* @param key API金鑰
* @return 簽名是否正確
* @throws Exception
*/
public static boolean isSignatureValid(String xmlStr, String key) throws Exception {
Map<String, String> data = xmlToMap(xmlStr);
if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) {
return false;
}
String sign = data.get(WXPayConstants.FIELD_SIGN);
return generateSignature(data, key).equals(sign);
}
/**
* 判斷簽名是否正確，必須包含sign欄位，否則返回false。使用MD5簽名。
*
* @param data Map型別資料
* @param key API金鑰
* @return 簽名是否正確
* @throws Exception
*/
public static boolean isSignatureValid(Map<String, String> data, String key) throws Exception {
return isSignatureValid(data, key, SignType.MD5);
}
/**
* 判斷簽名是否正確，必須包含sign欄位，否則返回false。
*
* @param data Map型別資料
* @param key API金鑰
* @param signType 簽名方式
* @return 簽名是否正確
* @throws Exception
*/
public static boolean isSignatureValid(Map<String, String> data, String key, SignType signType) throws Exception {
if (!data.containsKey(WXPayConstants.FIELD_SIGN) ) {
return false;
}
String sign = data.get(WXPayConstants.FIELD_SIGN);
return generateSignature(data, key, signType).equals(sign);
}
/**
* 生成簽名
*
* @param data 待簽名資料
* @param key API金鑰
* @return 簽名
*/
public static String generateSignature(final Map<String, String> data, String key) throws Exception {
return generateSignature(data, key, SignType.MD5);
}
/**
* 生成簽名. 注意，若含有sign_type欄位，必須和signType引數保持一致。
*
* @param data 待簽名資料
* @param key API金鑰
* @param signType 簽名方式
* @return 簽名
*/
public static String generateSignature(final Map<String, String> data, String key, SignType signType) throws Exception {
Set<String> keySet = data.keySet();
String[] keyArray = keySet.toArray(new String[keySet.size()]);
Arrays.sort(keyArray);
StringBuilder sb = new StringBuilder();
for (String k : keyArray) {
if (k.equals(WXPayConstants.FIELD_SIGN)) {
continue;
}
if (data.get(k).trim().length() > 0) // 引數值為空，則不參與簽名
sb.append(k).append("=").append(data.get(k).trim()).append("&");
}
sb.append("key=").append(key);
if (SignType.MD5.equals(signType)) {
return MD5(sb.toString()).toUpperCase();
}
else if (SignType.HMACSHA256.equals(signType)) {
return HMACSHA256(sb.toString(), key);
}
else {
throw new Exception(String.format("Invalid sign_type: %s", signType));
}
}
/**
* 獲取隨機字串 Nonce Str
*
* @return String 隨機字串
*/
public static String generateNonceStr() {
return UUID.randomUUID().toString().replaceAll("-", "").substring(0, 32);
}
/**
* 生成 MD5
*
* @param data 待處理資料
* @return MD5結果
*/
public static String MD5(String data) throws Exception {
java.security.MessageDigest md = MessageDigest.getInstance("MD5");
byte[] array = md.digest(data.getBytes("UTF-8"));
StringBuilder sb = new StringBuilder();
for (byte item : array) {
sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
}
return sb.toString().toUpperCase();
}
/**
* 生成 HMACSHA256
* @param data 待處理資料
* @param key 金鑰
* @return 加密結果
* @throws Exception
*/
public static String HMACSHA256(String data, String key) throws Exception {
Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
SecretKeySpec secret_key = new SecretKeySpec(key.getBytes("UTF-8"), "HmacSHA256");
sha256_HMAC.init(secret_key);
byte[] array = sha256_HMAC.doFinal(data.getBytes("UTF-8"));
StringBuilder sb = new StringBuilder();
for (byte item : array) {
sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
}
return sb.toString().toUpperCase();
}
/**
* 日誌
* @return
*/
// public static Logger getLogger() {
// Logger logger = LoggerFactory.getLogger("wxpay java sdk");
// return logger;
// }
/**
* 獲取當前時間戳，單位秒
* @return
*/
public static long getCurrentTimestamp() {
return System.currentTimeMillis()/1000;
}
/**
* 獲取當前時間戳，單位毫秒
* @return
*/
public static long getCurrentTimestampMs() {
return System.currentTimeMillis();
}
/**
* 生成 uuid， 即用來標識一筆單，也用做 nonce_str
* @return
*/
public static String generateUUID() {
return UUID.randomUUID().toString().replaceAll("-", "").substring(0, 32);
}
}/**
* 常量
*/
public class WXPayConstants {
public enum SignType {
MD5, HMACSHA256
}
public static final String DOMAIN_API = "api.mch.weixin.qq.com";
public static final String DOMAIN_API2 = "api2.mch.weixin.qq.com";
public static final String DOMAIN_APIHK = "apihk.mch.weixin.qq.com";
public static final String DOMAIN_APIUS = "apius.mch.weixin.qq.com";
public static final String FAIL = "FAIL";
public static final String SUCCESS = "SUCCESS";
public static final String HMACSHA256 = "HMAC-SHA256";
public static final String MD5 = "MD5";
public static final String FIELD_SIGN = "sign";
public static final String FIELD_SIGN_TYPE = "sign_type";
public static final String MICROPAY_URL_SUFFIX = "/pay/micropay";
public static final String UNIFIEDORDER_URL_SUFFIX = "/pay/unifiedorder";
public static final String ORDERQUERY_URL_SUFFIX = "/pay/orderquery";
public static final String REVERSE_URL_SUFFIX = "/secapi/pay/reverse";
public static final String CLOSEORDER_URL_SUFFIX = "/pay/closeorder";
public static final String REFUND_URL_SUFFIX = "/secapi/pay/refund";
public static final String REFUNDQUERY_URL_SUFFIX = "/pay/refundquery";
public static final String DOWNLOADBILL_URL_SUFFIX = "/pay/downloadbill";
public static final String REPORT_URL_SUFFIX = "/payitil/report";
public static final String SHORTURL_URL_SUFFIX = "/tools/shorturl";
public static final String AUTHCODETOOPENID_URL_SUFFIX = "/tools/authcodetoopenid";
// sandbox
public static final String SANDBOX_MICROPAY_URL_SUFFIX = "/sandboxnew/pay/micropay";
public static final String SANDBOX_UNIFIEDORDER_URL_SUFFIX = "/sandboxnew/pay/unifiedorder";
public static final String SANDBOX_ORDERQUERY_URL_SUFFIX = "/sandboxnew/pay/orderquery";
public static final String SANDBOX_REVERSE_URL_SUFFIX = "/sandboxnew/secapi/pay/reverse";
public static final String SANDBOX_CLOSEORDER_URL_SUFFIX = "/sandboxnew/pay/closeorder";
public static final String SANDBOX_REFUND_URL_SUFFIX = "/sandboxnew/secapi/pay/refund";
public static final String SANDBOX_REFUNDQUERY_URL_SUFFIX = "/sandboxnew/pay/refundquery";
public static final String SANDBOX_DOWNLOADBILL_URL_SUFFIX = "/sandboxnew/pay/downloadbill";
public static final String SANDBOX_REPORT_URL_SUFFIX = "/sandboxnew/payitil/report";
public static final String SANDBOX_SHORTURL_URL_SUFFIX = "/sandboxnew/tools/shorturl";
public static final String SANDBOX_AUTHCODETOOPENID_URL_SUFFIX = "/sandboxnew/tools/authcodetoopenid";
}