接着上次的博客<<>>讲起,我们还差sign和openId这两个参数就能得到prepay_id啦,加油哦,胜利在忘啦
sign
sign的工具类虽然我们在<<>>已经提供过了,但是为了方便大家,在这篇文章中,小编在提供一次
sign工具类
/**
* 获取签名 md5加密(微信支付必须用MD5加密)
* 获取支付签名
* @param characterEncoding
* @param parameters
* @return
*/
public static String getSign(String characterEncoding,SortedMap<Object,Object> parameters){
StringBuffer sb = new StringBuffer();
Set es = parameters.entrySet();//所有参与传参的参数按照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 = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
return sign;
}
有了工具类,那么我们如果通过工具类来生成sign呢?预备向下看,集合中参数的具体含义就不多说了,因为在<<>>中说过了,并且在统一下单开发文档中有详细的说明,地址再次留给大家https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1
SortedMap<Object,Object> mapsign = new TreeMap<Object,Object>();
mapsign.put("appid", appid);
mapsign.put("mch_id", mch_id);
mapsign.put("out_trade_no", out_trade_no);
mapsign.put("total_fee", total_fee);
mapsign.put("trade_type", trade_type);
mapsign.put("notify_url", notify_url);
mapsign.put("body", body);
mapsign.put("nonce_str", nonce_str);
mapsign.put("spbill_create_ip", spbill_create_ip);
mapsign.put("openid", openid);
mapsign.put("attach", attach);
mapsign.put("time_start", time_start);
String sign = PayUtil.getSign("UTF-8", mapsign);//签名 生成啦
openid的获取
查看文档网页授权获取用户基本信息
授权方式有两种
以snsapi_base为scope发起的网页授权,用户无感知
以snsapi_userinfo为scope发起的网页授权,用户有感知
页面<a href="
https://open.weixin.qq.com/connect/oauth2/authorize?appid= wx520c15f417810387&redirect_uri= https%3A%2F%2Fchong.qq.com%2Fphp%2Findex.php%3Fd%3D%26c%3DwxAdapter%26m%3DmobileDeal%26showwxpaytitle%3D1%26vb2ctag%3D4_2030_5_1194_60&response_type=code&scope=snsapi_base&state=123#wechat_redirect"></a>
重要的参数是以上两个红色参数 appid不多说 redirect_url为获得code的地址 我是用的springmvc框架,直接按照正常的参数接收写就行了
String code = request.getParameter("code");
然后请求这个地址
下文中,我会把请求的工具类送给大家,
//get
public static String sendGet(String url, String param) throws Exception {
String result = "";
BufferedReader in = null;
try {
String urlName = "";
if (param != null) {
if (!url.contains("?")) {
// URLEncoder.encode(param, "utf-8");
urlName = url + "?" + param;
} else {
urlName = url + "&" + param;
}
} else {
urlName = url;
}
URL realUrl = new URL(urlName);
URLConnection conn = null;
try {
conn = realUrl.openConnection();
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn
.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
// 设置超时
conn.setConnectTimeout(15 * 1000);
// 设置读超时
conn.setReadTimeout(15 * 1000);
conn.connect();
} catch (Exception e1) {
}
try {
in = new BufferedReader(new InputStreamReader(conn
.getInputStream(), "UTF-8"));
String line = null;
while ((line = in.readLine()) != null) {
result += "\n" + line;
}
} catch (Exception e2) {
}
} catch (Exception e) {
throw e;
} finally {
try {
if (in != null) {
in.close();
}
} catch (IOException ex) {
}
}
return result;
}
然后就得到了opendi,然后在按照统一下单文档的规范请求
就得到了prepay_id啦
然后就按照h5调起支付api进行传参数就ok啦
艾玛,累坏啦,去喝口水