public class PayCommonUtil {
//定义签名，微信根据参数字段的ASCII码值进行排序 加密签名,故使用SortMap进行参数排序 public static String createSign(String characterEncoding,SortedMap<String,String> parameters){ StringBuffer sb = new StringBuffer(); Set es = parameters.entrySet(); 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=" + ConstantUtil.PARTNER_KEY);//最后加密时添加商户密钥，由于key值放在最后，所以不用添加到SortMap里面去，单独处理，编码方式采用UTF-8 String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase(); return sign; }
//将封装好的参数转换成Xml格式类型的字符串
public static String getRequestXml(SortedMap<String,String> parameters){ StringBuffer sb = new StringBuffer(); sb.append("<xml>"); Set es = parameters.entrySet(); Iterator it = es.iterator(); while(it.hasNext()) { Map.Entry entry = (Map.Entry)it.next(); String k = (String)entry.getKey(); String v = (String)entry.getValue(); if("sign".equalsIgnoreCase(k)){
} else if ("attach".equalsIgnoreCase(k)||"body".equalsIgnoreCase(k)) { sb.append("<"+k+">"+"<![CDATA["+v+"]]></"+k+">"); } else { sb.append("<"+k+">"+v+"</"+k+">"); } } sb.append("<"+"sign"+">"+"<![CDATA["+parameters.get("sign")+"]]></"+"sign"+">"); sb.append("</xml>"); return sb.toString(); }}
//微信Md5加密工具
public class MD5Util {
private static String byteArrayToHexString(byte b[]) { StringBuffer resultSb = new StringBuffer(); for (int i = 0; i < b.length; i++) resultSb.append(byteToHexString(b[i]));
return resultSb.toString(); }
private static String byteToHexString(byte b) { int n = b; if (n < 0) n += 256; int d1 = n / 16; int d2 = n % 16; return hexDigits[d1] + hexDigits[d2]; }
public static String MD5Encode(String origin, String charsetname) { String resultString = null; try { resultString = new String(origin); MessageDigest md = MessageDigest.getInstance("MD5"); if (charsetname == null || "".equals(charsetname)) resultString = byteArrayToHexString(md.digest(resultString .getBytes())); else resultString = byteArrayToHexString(md.digest(resultString .getBytes(charsetname))); } catch (Exception exception) { } return resultString; }
private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
}
//微信返回的结果为Xml格式的字符串，XmlUtil主要用于解析结果
public class XMLUtil {
/** * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。 * @param strxml * @return * @throws JDOMException * @throws IOException */ public static Map doXMLParse(String strxml) throws JDOMException, IOException { strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");
if(null == strxml || "".equals(strxml)) { return null; }
Map m = new HashMap();
InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8")); SAXBuilder builder = new SAXBuilder(); Document doc = builder.build(in); Element root = doc.getRootElement(); List list = root.getChildren(); Iterator it = list.iterator(); while(it.hasNext()) { Element e = (Element) it.next(); String k = e.getName(); String v = ""; List children = e.getChildren(); if(children.isEmpty()) { v = e.getTextNormalize(); } else { v = XMLUtil.getChildrenText(children); }
m.put(k, v); }
//关闭流 in.close();
return m; }
/** * 获取子结点的xml * @param children * @return String */ public static String getChildrenText(List children) { StringBuffer sb = new StringBuffer(); if(!children.isEmpty()) { Iterator it = children.iterator(); while(it.hasNext()) { Element e = (Element) it.next(); String name = e.getName(); String value = e.getTextNormalize(); List list = e.getChildren(); sb.append("<" + name + ">"); if(!list.isEmpty()) { sb.append(XMLUtil.getChildrenText(list)); } sb.append(value); sb.append("</" + name + ">"); } }
return sb.toString(); }
/** * 获取xml编码字符集 * @param strxml * @return * @throws IOException * @throws JDOMException */ public static String getXMLEncoding(String strxml) throws JDOMException, IOException { InputStream in = HttpClientUtil.String2Inputstream(strxml); SAXBuilder builder = new SAXBuilder(); Document doc = builder.build(in); in.close(); return (String)doc.getProperty("encoding"); }}
//发送https
public class CommonUtil { private static Logger log = LoggerFactory.getLogger(CommonUtil.class); /** * 发送https请求 * @param requestUrl 请求地址 * @param requestMethod 请求方式（GET、POST） * @param outputStr 提交的数据 * @return 返回微信服务器响应的信息 */ public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) { try { // 创建SSLContext对象，并使用我们指定的信任管理器初始化 MyX509TrustManager[] tm = { new MyX509TrustManager() }; SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE"); sslContext.init(null, tm, new java.security.SecureRandom()); // 从上述SSLContext对象中得到SSLSocketFactory对象 SSLSocketFactory ssf = sslContext.getSocketFactory(); URL url = new URL(requestUrl); HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(); conn.setSSLSocketFactory(ssf); conn.setDoOutput(true); conn.setDoInput(true); conn.setUseCaches(false); // 设置请求方式（GET/POST） conn.setRequestMethod(requestMethod); conn.setRequestProperty("content-type", "application/x-www-form-urlencoded"); // 当outputStr不为null时向输出流写数据 if (null != outputStr) { OutputStream outputStream = conn.getOutputStream(); // 注意编码格式 outputStream.write(outputStr.getBytes("UTF-8")); outputStream.close(); } // 从输入流读取返回内容 InputStream inputStream = conn.getInputStream(); InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8"); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); String str = null; StringBuffer buffer = new StringBuffer(); while ((str = bufferedReader.readLine()) != null) { buffer.append(str); } // 释放资源 bufferedReader.close(); inputStreamReader.close(); inputStream.close(); inputStream = null; conn.disconnect(); return buffer.toString(); } catch (ConnectException ce) { log.error("连接超时：{}", ce); } catch (Exception e) { log.error("https请求异常：{}", e); } return null; }
/** * 获取接口访问凭证 * * @param appid 凭证 * @param appsecret 密钥 * @return *//* public static Token getToken(String appid, String appsecret) { Token token = null; String requestUrl = ConfigUtil.TOKEN_URL.replace("APPID", appid).replace("APPSECRET", appsecret); // 发起GET请求获取凭证 JSONObject jsonObject = JSONObject.fromObject(httpsRequest(requestUrl, "GET", null));
if (null != jsonObject) { try { token = new Token(); token.setAccessToken(jsonObject.getString("access_token")); token.setExpiresIn(jsonObject.getInt("expires_in")); } catch (JSONException e) { token = null; // 获取token失败 log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg")); } } return token; } public static String urlEncodeUTF8(String source){ String result = source; try { result = java.net.URLEncoder.encode(source,"utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return result; }*/}
重点：封装参数调用统一下单接口，生成prepay_id(预支付订单Id)
/** * 微信支付 * @param orderId 订单编号 * @param actualPay 实际支付金额 * @return */private String generateOrderInfoByWeiXinPay(String orderId, float actualPay,HttpServletRequest request,HttpServletResponse response) throws Exception{ String notify_url = propertiesService.WEI_XIN_NOTIFY_URL;//回调地址 String uuid = IdGen.uuid(); System.out.print("uuid" + uuid); SortedMap<String, String> signParams = new TreeMap<String, String>(); signParams.put("appid", ConstantUtil.APP_ID);//app_id signParams.put("body","测试");//商品参数信息 signParams.put("mch_id", ConstantUtil.PARTNER);//微信商户账号 signParams.put("nonce_str", uuid);//32位不重复的编号 signParams.put("notify_url", notify_url);//回调页面 signParams.put("out_trade_no", orderId);//订单编号 signParams.put("spbill_create_ip",request.getRemoteAddr() );//请求的实际ip地址 signParams.put("total_fee","1");//支付金额 单位为分 signParams.put("trade_type", "APP");付款类型为APP String sign = PayCommonUtil.createSign("UTF-8", signParams);//生成签名 signParams.put("sign", sign); signParams.remove("key");//调用统一下单无需key（商户应用密钥） String requestXml = PayCommonUtil.getRequestXml(signParams);//生成Xml格式的字符串 String result = CommonUtil.httpsRequest (ConstantUtil.UNIFIED_ORDER_URL, "POST", requestXml);//以post请求的方式调用统一下单接口
（注：ConstantUtil.UNIFIED_ORDER_URL=https://api.mch.weixin.qq.com/pay/unifiedorder;
）
返回的result成功结果取出prepay_id：
Map map = XMLUtil.doXMLParse(result);String return_code=(String) map.get("return_code");String prepay_id =null;String returnSign=null;String returnNonce_str=null;if (return_code.contains("SUCCESS")){ prepay_id=(String) map.get("prepay_id");//获取到prepay_id}StringBuffer weiXinVo=new StringBuffer();long currentTimeMillis = System.currentTimeMillis();//生成时间戳long second = currentTimeMillis / 1000L;（转换成秒）String seconds = String.valueOf(second).substring(0, 10);（截取前10位）SortedMap<String, String> signParam = new TreeMap<String, String>();signParam.put("appid", ConstantUtil.APP_ID);//app_idsignParam.put("partnerid", ConstantUtil.PARTNER);//微信商户账号signParam.put("prepayid", prepay_id);//预付订单idsignParam.put("package", "Sign=WXPay");//默认sign=WXPaysignParam.put("noncestr", uuid);//自定义不重复的长度不长于32位signParam.put("timestamp",seconds);//北京时间时间戳String signAgain = PayCommonUtil.createSign("UTF-8", signParam);//再次生成签名signParams.put("sign", signAgain);weiXinVo.append("appid=").append(ConstantUtil.APP_ID).append("&partnerid=").append(ConstantUtil.PARTNER).append("&prepayid=").append(prepay_id).append("&package=Sign=WXPay").append("&noncestr=").append(uuid).append("×tamp=").append(seconds).append("&sign=").append(signAgain);//拼接参数返回给移动端return weiXinVo.toString();
（注：感谢IOS团队的联调支持）
时间： 2024-10-07 05:23:12