java開發微信公眾號支付
阿新 • • 發佈：2019-02-14
注意：這裡騰訊用的是xml格式的引數因此需要把引數轉成xml格式。這裡用的是XStream，並且需要把sendData 和 returnData 封裝成classString strAttach = "微信支付"; //strAttach = new String(strAttach.getBytes("gbk"),"utf-8"); String strBody = "微信公眾號支付"; //strBody = new String(strBody.getBytes("gbk"),"utf-8"); Order order= orderService.findBySn(sn); String ip = request.getRemoteAddr(); WxPaySendData data = new WxPaySendData(); data.setAppid(Configure.getAppid()); data.setAttach(URLEncoder.encode(strAttach, "UTF-8")); data.setBody(URLEncoder.encode(strBody, "UTF-8")); data.setMch_id(Configure.getMchid()); data.setNonce_str(RandomStringGenerator.getRandomStringByLength(32)); data.setNotify_url(Configure.getNotify_url()); data.setOut_trade_no(UtilDate.getOrderNum()); data.setTotal_fee((order.getAmount().multiply(new BigDecimal(100)).intValue()));//單位：分 data.setTrade_type("JSAPI"); data.setSpbill_create_ip(ip); data.setOpenid(at.getOpenid()); String returnXml = UnifiedorderService.unifiedOrder(data,Configure.getKey()); WxPayReturnData reData = new WxPayReturnData(); XStream xs1 = new XStream(new DomDriver()); xs1.alias("xml", WxPayReturnData.class); reData = (WxPayReturnData) xs1.fromXML(returnXml);
//工具類 UnifiedorderService.java public class UnifiedorderService { private final static Logger logger = LoggerFactory.getLogger(UnifiedorderService.class); public static String unifiedOrder(WxPaySendData data,String key){ //統一下單支付 String returnXml = null; try { //生成sign簽名 SortedMap<Object,Object> parameters = new TreeMap<Object,Object>(); parameters.put("appid", data.getAppid()); parameters.put("attach", data.getAttach()); parameters.put("body", data.getBody()); parameters.put("mch_id", data.getMch_id()); parameters.put("nonce_str", data.getNonce_str()); parameters.put("notify_url", data.getNotify_url()); parameters.put("out_trade_no", data.getOut_trade_no()); parameters.put("total_fee", data.getTotal_fee()); parameters.put("trade_type", data.getTrade_type()); parameters.put("spbill_create_ip", data.getSpbill_create_ip()); parameters.put("openid", data.getOpenid()); parameters.put("device_info", data.getDevice_info()); logger.info("SIGN:"+WxSign.createSign(parameters,key)); data.setSign(WxSign.createSign(parameters,key)); XStream xs = new XStream(new DomDriver("UTF-8",new XmlFriendlyNameCoder("-_", "_"))); xs.alias("xml", WxPaySendData.class); String xml = xs.toXML(data); logger.info("統一下單xml為:\n" + xml); HttpClientUtil util = HttpClientUtil.getInstance(); returnXml = util.doPostForString("https://api.mch.weixin.qq.com/pay/unifiedorder", null, xml); logger.info("返回結果:" + returnXml); } catch (Exception e) { e.printStackTrace(); } return returnXml; } }
//工具類 WxSign.java public class WxSign { private static String characterEncoding = "UTF-8"; @SuppressWarnings("rawtypes") public static String createSign(SortedMap<Object,Object> parameters,String key){ StringBuffer sb = new StringBuffer(); Set es = parameters.entrySet();//所有參與傳參的引數按照accsii排序（升序） Iterator it = es.iterator(); while(it.hasNext()) { Map.Entry entry = (Map.Entry)it.next(); String k = (String)entry.getKey(); Object v = entry.getValue(); if(null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)) { sb.append(k + "=" + v + "&"); } } sb.append("key=" + key); String sign = MD5.MD5Encode(sb.toString(), characterEncoding).toUpperCase(); return sign; } public static String getNonceStr() { Random random = new Random(); return MD5Util.MD5Encode(String.valueOf(random.nextInt(10000)), "UTF-8"); } public static String getTimeStamp() { return String.valueOf(System.currentTimeMillis() / 1000); } }
//md5.java
package com.pawpaw.plugin.tencentpay;
import java.security.MessageDigest;
/**
* User: rizenguo
* Date: 2014/10/23
* Time: 15:43
*/
public class MD5 {
private final static String[] hexDigits = {"0", "1", "2", "3", "4", "5", "6", "7",
"8", "9", "a", "b", "c", "d", "e", "f"};
/**
* 轉換位元組陣列為16進位制字串
* @param b 位元組陣列
* @return 16進位制字串
*/
public static String byteArrayToHexString(byte[] b) {
StringBuilder resultSb = new StringBuilder();
for (byte aB : b) {
resultSb.append(byteToHexString(aB));
}
return resultSb.toString();
}
/**
* 轉換byte到16進位制
* @param b 要轉換的byte
* @return 16進位制格式
*/
private static String byteToHexString(byte b) {
int n = b;
if (n < 0) {
n = 256 + n;
}
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}
/**
* MD5編碼
* @param origin 原始字串
* @return 經過MD5加密之後的結果
*/
public static String MD5Encode(String origin) {
String resultString = null;
try {
resultString = origin;
MessageDigest md = MessageDigest.getInstance("MD5");
resultString = byteArrayToHexString(md.digest(resultString.getBytes()));
} catch (Exception e) {
e.printStackTrace();
}
return resultString;
}
}
//WxPaySendData.java
package com.pawpaw.entity;
public class WxPaySendData {
//公眾號ID
private String appid;
//附加引數
private String attach;
//商品名稱
private String body;
//商戶ID
private String mch_id;
//隨機支付串
private String nonce_str;
//通知地址,不能攜帶引數,直接就能訪問
private String notify_url;
//使用者訂單號
private String out_trade_no;
//總金額 以分為單位
private int total_fee;
//交易型別
private String trade_type;
//終端IP
private String spbill_create_ip;
//openID
private String openid;
//簽名
private String sign;
public String getAppid() {
return appid;
}
public void setAppid(String appid) {
this.appid = appid;
}
public String getAttach() {
return attach;
}
public void setAttach(String attach) {
this.attach = attach;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
public String getMch_id() {
return mch_id;
}
public void setMch_id(String mch_id) {
this.mch_id = mch_id;
}
public String getNonce_str() {
return nonce_str;
}
public void setNonce_str(String nonce_str) {
this.nonce_str = nonce_str;
}
public String getNotify_url() {
return notify_url;
}
public void setNotify_url(String notify_url) {
this.notify_url = notify_url;
}
public String getOut_trade_no() {
return out_trade_no;
}
public void setOut_trade_no(String out_trade_no) {
this.out_trade_no = out_trade_no;
}
public int getTotal_fee() {
return total_fee;
}
public void setTotal_fee(int total_fee) {
this.total_fee = total_fee;
}
public String getTrade_type() {
return trade_type;
}
public void setTrade_type(String trade_type) {
this.trade_type = trade_type;
}
public String getSpbill_create_ip() {
return spbill_create_ip;
}
public void setSpbill_create_ip(String spbill_create_ip) {
this.spbill_create_ip = spbill_create_ip;
}
public String getOpenid() {
return openid;
}
public void setOpenid(String openid) {
this.openid = openid;
}
public String getSign() {
return sign;
}
public void setSign(String sign) {
this.sign = sign;
}
}
//WxPayReturnData.java
package com.pawpaw.entity;
public class WxPayReturnData {
//業務結果
private String return_code;
//訊息
private String return_msg;
//公眾號ID
private String appid;
//商戶ID
private String mch_id;
//隨機支付串
private String nonce_str;
//簽名
private String sign;
//業務結果
private String result_code;
//預支付ID
private String prepay_id;
//交易型別
private String trade_type;
public String getReturn_code() {
return return_code;
}
public void setReturn_code(String return_code) {
this.return_code = return_code;
}
public String getReturn_msg() {
return return_msg;
}
public void setReturn_msg(String return_msg) {
this.return_msg = return_msg;
}
public String getAppid() {
return appid;
}
public void setAppid(String appid) {
this.appid = appid;
}
public String getMch_id() {
return mch_id;
}
public void setMch_id(String mch_id) {
this.mch_id = mch_id;
}
public String getNonce_str() {
return nonce_str;
}
public void setNonce_str(String nonce_str) {
this.nonce_str = nonce_str;
}
public String getSign() {
return sign;
}
public void setSign(String sign) {
this.sign = sign;
}
public String getResult_code() {
return result_code;
}
public void setResult_code(String result_code) {
this.result_code = result_code;
}
public String getPrepay_id() {
return prepay_id;
}
public void setPrepay_id(String prepay_id) {
this.prepay_id = prepay_id;
}
public String getTrade_type() {
return trade_type;
}
public void setTrade_type(String trade_type) {
this.trade_type = trade_type;
}
}最後要提一下的是NOTIFY_URL回撥地址，接收微信支付非同步通知回撥地址。
三 通過上面的操作我們獲得了預支付交易會話標識prepay_id，這樣我們就可以進行最後一步的操作了。使用H5調起支付api。