微信支付H5调用支付详解（java版）

 import java.io.ByteArrayInputStream; import javaioIOException; import javaioInputStream; import javaioUnsupportedEncodingException; import javautilDate; import javautilHashMap; import javautilIterator; import javautilMap; import javautilMapEntry; import javautilRandom; import javaxservlethttpHttpServletRequest; import javaxservlethttpHttpServletResponse; import orgapachecommonscodecdigestDigestUtils; import orgspringframeworkstereotypeController; import orgspringframeworkwebbindannotationRequestMapping; import orgxmlpullvXmlPullParser; import orgxmlpullvXmlPullParserException; import orgxmlpullvXmlPullParserFactory; import comfasterxmljacksondatabindJsonNode; import comgsonoauthOauth; import comgsonoauthPay; import comgsonutilHttpKit; import comsyutilDatetimeUtil; import comsyutilJsonUtil; @Controller @RequestMapping("/pay") public class WXPayController { @RequestMapping(value = "wxprepaydo") public void jspay(HttpServletRequest request, HttpServletResponse response, String callback) throws Exception { // 获取openid String openId = SessionUtilgetAtt(request, "openId"); if (openId == null) { openId = getUserOpenId(request); } String appid = "wx16691fcb0523c1a4"; String paternerKey = "ININGFENG1234567fdfwfdfd1ss234567"; String out_trade_no = getTradeNo(); Map paraMap = new HashMap(); paraMapput("appid", appid); paraMapput("attach", "测试"); paraMapput("body", "测试购买支付"); paraMapput("mch_id", "10283271"); paraMapput("nonce_str", create_nonce_str()); paraMapput("openid", openId); paraMapput("out_trade_no", out_trade_no); paraMapput("spbill_create_ip", getAddrIp(request)); paraMapput("total_fee", "1"); paraMapput("trade_type", "JSAPI"); paraMapput("notify_url", "http://wwwxxxco/bank/page/wxnotify"); String sign = getSign(paraMap, paternerKey); paraMapput("sign", sign); // 统一下单 https://apimchweixinqqcom/pay/unifiedorder String url = "https://apimchweixinqqcom/pay/unifiedorder"; String xml = ArrayToXml(paraMap); String xmlStr = HttpKitpost(url, xml); // 预付商品id String prepay_id = ""; if (xmlStrindexOf("SUCCESS") != -1) { Map map = doXMLParse(xmlStr); prepay_id = (String) mapget("prepay_id"); } Map payMap = new HashMap(); payMapput("appId", appid); payMapput("timeStamp", create_timestamp()); payMapput("nonceStr", create_nonce_str()); payMapput("signType", "MD5"); payMapput("package", "prepay_id=" + prepay_id); String paySign = getSign(payMap, paternerKey); payMapput("pg", prepay_id); payMapput("paySign", paySign); WebUtilresponse(response, WebUtilpackJsonp(callback, JsonUtilwarpJsonNodeResponse(JsonUtilobjectToJsonNode(payMap))toString())); } /** * map转成xml * * @param arr * @return */ public String ArrayToXml(Map arr) { String xml = ""; Iterator> iter = arrentrySet()iterator(); while (iterhasNext()) { Entry entry = iternext(); String key = entrygetKey(); String val = entrygetValue(); xml += "<" + key + ">" + val + ""; } xml += ""; return xml; } // 获取openId private String getUserOpenId(HttpServletRequest request) throws Exception { String code = requestgetParameter("code"); if (code == null) { String openId = requestgetParameter("openId"); return openId; } Oauth o = new Oauth(); String token = ogetToken(code); JsonNode node = JsonUtilStringToJsonNode(token); String openId = nodeget("openid")asText(); return openId; } private String create_nonce_str() { String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; String res = ""; for (int i = 0; i <16; i++) { Random rd = new Random(); res += charscharAt(rdnextInt(charslength() - 1)); } return res; } private String getAddrIp(HttpServletRequest request){ return requestgetRemoteAddr(); } private String create_timestamp() { return LongtoString(SystemcurrentTimeMillis() / 1000); } private String getTradeNo(){ String timestamp = DatetimeUtilformatDate(new Date(), DatetimeUtilDATETIME_PATTERN); return "HZNO" + timestamp; } private String getSign(Map params, String paternerKey ) throws UnsupportedEncodingException { String string1 = PaycreateSign(params, false); String stringSignTemp = string1 + "&key=" + paternerKey; String signValue = DigestUtilsmd5Hex(stringSignTemp)toUpperCase(); return signValue; } private Map doXMLParse(String xml) throws XmlPullParserException, IOException { InputStream inputStream = new ByteArrayInputStream(xmlgetBytes()); Map map = null; XmlPullParser pullParser = XmlPullParserFactorynewInstance() newPullParser(); pullParsersetInput(inputStream, "UTF-8"); // 为xml设置要解析的xml数据 int eventType = pullParsergetEventType(); while (eventType != XmlPullParserEND_DOCUMENT) { switch (eventType) { case XmlPullParserSTART_DOCUMENT: map = new HashMap(); break; case XmlPullParserSTART_TAG: String key = pullParsergetName(); if (keyequals("xml")) break; String value = pullParsernextText(); mapput(key, value); break; case XmlPullParserEND_TAG: break; } eventType = pullParsernext(); } return map; } } 

 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ taglib prefix="spring" uri="http://wwwspringframeworkorg/tags" %><% String path = requestgetContextPath(); String basePath = requestgetScheme() + "://" + requestgetServerName() + ":" + requestgetServerPort() + path + "/"; %>   
 
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