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public String getOpenId(){
String code = getPara("code");
String openid = "";
if (StringUtils.isEmpty(openid) && !StringUtils.isEmpty(code)) {
SnsAccessToken token = SnsAccessTokenApi.getSnsAccessToken("你的APPID","你的appsecret密码",
code);
openid = token.getOpenid();
}
getSession().setAttribute("openandid",openid);
return openid;
}
public void index() throws Exception{
String openid = getOpenId();
//得到金额
String money= getPara("money");
Map<String ,String > map=new HashMap<String,String>();
//获取随机串
String nonceStr=UUID.randomUUID().toString().substring(0, 32);
//可以是支付物品的订单号。一个号码，看自己怎么给
String out_trade_no="123456789";
//支付金额。微信默认支付是(1=0.01)的比例，下面是将金额换算成微信可识别的
BigDecimal re1=new BigDecimal(expressCharge);
BigDecimal re2=new BigDecimal(Float.toString(100.00f));
Float aa = re1.multiply(re2).floatValue();
String total_fee = String.valueOf(aa);
String[] smill = total_fee.split("\\.");
total_fee = smill[0];
//微信的appid
String appid="XXXXXXXXXXXXXXXXX";
String mch_id="XXXXXXXXX";//商户号
String body="xxxxxxx";//商品信息，可以自己起最好写英文
//密匙,商户平台的支付API密匙，注意是商户平台，不是微信平台
String key = "XXXXXXXXXXXXXXXXXXXXXXXXXXXX";
long timestamp = System.currentTimeMillis() / 1000;
map.put("appid", appid );
map.put("mch_id", mch_id);
map.put("nonce_str",nonceStr);
map.put("body", body);
map.put("out_trade_no", out_trade_no);
map.put("total_fee", total_fee);
map.put("spbill_create_ip",getRequest().getRemoteAddr());
//这里是支付成功后返回的地址，微信会以XML形式放回数据,就是本篇文章的下一类(例：wxxml())方法名。
map.put("notify_url", "http://www.XXXX.com/XXXX/XXXX/xxxx/wxxml");
map.put("trade_type", "JSAPI");
map.put("openid", openid);//传入OpenId
//这里传入Map集合和key商户支付密匙
String paySign=getPayCustomSign(map,key);
map.put("sign",paySign);
//将map转为XML格式
String xml= ArrayToXml(map);
//统一下单，这里不用改
String url = "https://api.mch.weixin.qq.com/pay/unifiedorder";
String xmlStr = HttpKit.post(url, xml);
//prepayid由微信返回的 。
String prepayid = "";
if (xmlStr.indexOf("SUCCESS") != -1) {
Map<String, String> map2 = doXMLParse(xmlStr);
prepayid = (String) map2.get("prepay_id");
}
String paySign2=getPayCustomSign(signMap,key);
setAttr("model", model);
setAttr("appId", appid);
setAttr("paytimestamp", String.valueOf(timestamp));
setAttr("paynonceStr", nonceStr);
setAttr("paypackage", "prepay_id="+prepayid);
setAttr("paysignType","MD5");
setAttr("paySign", paySign2);
//去到确认支付页面,返回页面方式不同,(例：pay.html页面)，下面
render("/XXXX/pay.html");
}
/**
* 获取支付所需签名
* @param ticket
* @param timeStamp
* @param card_id
* @param code
* @return
* @throws Exception
*/
public static String getPayCustomSign(Map<String, String> bizObj,String key) throws Exception {
String bizString = FormatBizQueryParaMap(bizObj, false);
return sign(bizString, key);
}
/**
* 字典排序
* @param paraMap
* @param urlencode
* @return
* @throws Exception
*/
public static String FormatBizQueryParaMap(Map<String, String> paraMap,
boolean urlencode) throws Exception {
String buff = "";
try {
List<Map.Entry<String, String>> infoIds = new ArrayList<Map.Entry<String, String>>(paraMap.entrySet());
Collections.sort(infoIds,
new Comparator<Map.Entry<String, String>>() {
public int compare(Map.Entry<String, String> o1,
Map.Entry<String, String> o2) {
return (o1.getKey()).toString().compareTo(
o2.getKey());
}
});
for (int i = 0; i < infoIds.size(); i++) {
Map.Entry<String, String> item = infoIds.get(i);
//System.out.println(item.getKey());
if (item.getKey() != "") {
String key = item.getKey();
String val = item.getValue();
if (urlencode) {
val = URLEncoder.encode(val, "utf-8");
}
buff += key + "=" + val + "&";
}
}
if (buff.isEmpty() == false) {
buff = buff.substring(0, buff.length() - 1);
}
} catch (Exception e) {
throw new Exception(e.getMessage());
}
return buff;
}
//支付所需签名处调用此方法
public static String sign(String content, String key)
throws Exception{
String signStr = "";
signStr = content + "&key=" + key;
return MD5(signStr).toUpperCase();
}
//上一方法，MD5加密处理
public final static String MD5(String s) {
char hexDigits[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
try {
byte[] btInput = s.getBytes();
MessageDigest mdInst = MessageDigest.getInstance("MD5");
mdInst.update(btInput);
byte[] md = mdInst.digest();
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
//转为XML格式
public static String ArrayToXml(Map<String, String> arr) {
String xml = "<xml>";
Iterator<Entry<String, String>> iter = arr.entrySet().iterator();
while (iter.hasNext()) {
Entry<String, String> entry = iter.next();
String key = entry.getKey();
String val = entry.getValue();
if (IsNumeric(val)) {
xml += "<" + key + ">" + val + "</" + key + ">";
} else
xml += "<" + key + "><![CDATA[" + val + "]]></" + key + ">";
}
xml += "</xml>";
return xml;
}
public static boolean IsNumeric(String str) {
if (str.matches("\\d *")) {
return true;
} else {
return false;
}
}
//解析XML
private Map<String, String> doXMLParse(String xml)
throws XmlPullParserException, IOException {
InputStream inputStream = new ByteArrayInputStream(xml.getBytes());
Map<String, String> map = null;
XmlPullParser pullParser = XmlPullParserFactory.newInstance()
.newPullParser();
pullParser.setInput(inputStream, "UTF-8");// 为xml设置要解析的xml数据
int eventType = pullParser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
switch (eventType) {
case XmlPullParser.START_DOCUMENT:
map = new HashMap<String, String>();
break;
case XmlPullParser.START_TAG:
String key = pullParser.getName();
if (key.equals("xml"))
break;
String value = pullParser.nextText();
map.put(key, value);
break;
case XmlPullParser.END_TAG:
break;
}
eventType = pullParser.next();
}
return map;
}
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