Micro-Credit Payment Java version V3 validation data legality (DEOM) _java

Source: Internet
Author: User
Tags stringbuffer

1.1 Parsing micro-letter callback data

InputStream instream = Request.getinputstream ();
Bytearrayoutputstream Outsteam = new Bytearrayoutputstream ();
byte[] buffer = new byte[1024];
int len = 0;
while (len = instream.read (buffer))!=-1) {
outsteam.write (buffer, 0, Len);
Outsteam.close ();
Instream.close ();
/** Gets the Notify_url return XML message of the micro-mail Call/
string result = new String (Outsteam.tobytearray (), "utf-8");

The result is the XML data returned by the micro-trust callback.

1.2 Parsing the XML data returned by the micro-letter

* Incoming micro-letter callback returns XML information
* returns in map form for easy value
* dom4j parse XML, return first-level element key-value pairs. If the first level element has child nodes, the value of this node is null
* @param strxml
* @return
* @throws documentexception
* * @SuppressWarnings ("Rawtypes")
public static sortedmap<string, string> Dom4jxmlparse (String strxml) throws documentexception {
SortedMap <string, string> SMAP = new treemap<string, string> ();
Document doc = Documenthelper.parsetext (strxml);
Element root = Doc.getrootelement ();
for (Iterator iterator = Root.elementiterator (); Iterator.hasnext ();) {
element E = (Element) iterator.next ();
Smap.put (E.getname (), E.gettext ());
return SMAP;

Returns the ordered map format data, taking the value of Smap.get ("field name") to get the data.

1.3 Verifying the legality of the micro-letter return signature

* Whether the micro-letter V3 signature, the rule is: by parameter name A-Z sort, encountered null parameters do not participate in the signature
* Incoming micro-letter return information after parsing the sortedmap format parameter data
* Verify that the message is a legal message from the micro-letter *
Param SMAP
* @param apikey Set Key
* @return Verification result * *
@SuppressWarnings ("rawtypes") public
static Boolean iswechatsign (sortedmap<string, string> smap,string apikey) {
StringBuffer sb = new StringBuffer (); C11/>set es = Smap.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) &&! " Key ". Equals (k)) {
sb.append (k +" = "+ V +" & ");
Sb.append ("key=" + apikey);
/** Authenticated Signature */
String sign = Md5util.md5encode (sb.tostring (), "Utf-8"). toUpperCase ();
/** the legal signature returned by the micro-letter/
String validsign = ((String) smap.get ("sign")). toUpperCase ();
return validsign.equals (sign);

Personal advice: To verify the legality of the micro-letter signature, you can first determine whether the Return_code and Result_code returned by the micro-letter are success.

The above is a small set to introduce the micro-letter to pay the Java version of the V3 Verify data Legality (DEOM), I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!

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