java_微信支付_统一下单工具类

package com.tenpay.util; import java.io.BufferedReader; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.math.BigDecimal; import java.net.ConnectException; import java.net.HttpURLConnection; import java.net.InetAddress; import java.net.URL; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Random; import java.util.Set; import java.util.SortedMap; import java.util.TreeMap; import javax.servlet.http.HttpServletRequest; import org.jdom.Document; import org.jdom.Element; import org.jdom.JDOMException; import org.jdom.input.SAXBuilder; public class PayCommonUtil { //微信参数配置 public static String APPID = "wxb8333bfcc2e67e9d"; //注意这个key必须从https://pay.weixin.qq.com/index.php/core/cert/api_cert，重新生成，一次生成后不宜修改 public static String API_KEY = "6E0BB9100C9AF7384EB0280EB56F84AE"; //商户号微信注册的时候会发送到账户 public static String MCH_ID = "1492745762"; @SuppressWarnings("unchecked") public static Map<String, String> weixinPrePay(String sn,int totalAmount, String description, InetAddress request) { SortedMap<String, Object> parameterMap = new TreeMap<String, Object>(); parameterMap.put("appid", PayCommonUtil.APPID); parameterMap.put("mch_id", PayCommonUtil.MCH_ID); parameterMap.put("nonce_str", PayCommonUtil.getRandomString(32)); parameterMap.put("body", "圣菲花园-充值"); parameterMap.put("out_trade_no", sn); parameterMap.put("fee_type", "CNY"); parameterMap.put("total_fee", totalAmount+""); System.out.println("jiner2"); parameterMap.put("spbill_create_ip", request.getHostAddress()); parameterMap.put("notify_url", "http://xxx.com"); parameterMap.put("trade_type", "APP"); String sign = PayCommonUtil.createSign("UTF-8", parameterMap,API_KEY); parameterMap.put("sign", sign); String requestXML = PayCommonUtil.getRequestXml(parameterMap); System.out.println(requestXML); String result = PayCommonUtil.httpsRequest( "https://api.mch.weixin.qq.com/pay/unifiedorder", "POST", requestXML); System.out.println(result); Map<String, String> map = null; try { map = PayCommonUtil.doXMLParse(result); } catch (JDOMException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return map; } //随机字符串生成 public static String getRandomString(int length) { //length表示生成字符串的长度 String base = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; Random random = new Random(); StringBuffer sb = new StringBuffer(); for (int i = 0; i < length; i++) { int number = random.nextInt(base.length()); sb.append(base.charAt(number)); } return sb.toString(); } //请求xml组装 public static String getRequestXml(SortedMap<String, Object> 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 key = (String) entry.getKey(); String value = (String) entry.getValue(); if ("attach".equalsIgnoreCase(key) || "body".equalsIgnoreCase(key) || "sign".equalsIgnoreCase(key)) { sb.append("<" + key + ">" + "<![CDATA[" + value + "]]></" + key + ">"); } else { sb.append("<" + key + ">" + value + "</" + key + ">"); } } sb.append("</xml>"); return sb.toString(); } //生成签名 public static String createSign(String characterEncoding, SortedMap<String, Object> parameters, String apiKey) { 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=" + apiKey); System.out.println(sb.toString()); String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase(); return sign; } /** * 验证回调签名 * @param packageParams * @param key * @param charset * @return */ public static boolean isTenpaySign(Map<String, String> map, String apiKey) throws UnsupportedEncodingException { String charset = "utf-8"; String signFromAPIResponse = map.get("sign"); if (signFromAPIResponse == null || signFromAPIResponse.equals("")) { System.out.println("API返回的数据签名数据不存在，有可能被第三方篡改!!!"); return false; } System.out.println("服务器回包里面的签名是:" + signFromAPIResponse); //过滤空 设置 TreeMap SortedMap<String, String> packageParams = new TreeMap<>(); for (String parameter : map.keySet()) { String parameterValue = map.get(parameter); String v = ""; if (null != parameterValue) { v = parameterValue.trim(); } packageParams.put(parameter, v); } StringBuffer sb = new StringBuffer(); Set es = packageParams.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".equals(k) && null != v && !"".equals(v)) { sb.append(k + "=" + v + "&"); } } sb.append("key=" + apiKey); //将API返回的数据根据用签名算法进行计算新的签名，用来跟API返回的签名进行比较 //算出签名 String resultSign = ""; String tobesign = sb.toString(); if (null == charset || "".equals(charset)) { resultSign = MD5Util.MD5Encode(tobesign, charset).toUpperCase(); } else { resultSign = MD5Util.MD5Encode(tobesign, charset).toUpperCase(); } String tenpaySign = packageParams.get("sign").toUpperCase(); return tenpaySign.equals(resultSign); } //请求方法 public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) { try { URL url = new URL(requestUrl); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 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.clos