微信公眾平臺 java 接入 1
/**
*
* 微信驗證token
*
*/
@RequestMapping(value = "/verifyToken", method = RequestMethod.GET)
public void verifyToken(HttpServletRequest request, HttpServletResponse response) throws Exception {
PrintWriter out = null;
try{
// 隨機字串
String echostr = request.getParameter("echostr");
if(echostr!=null){
// 微信加密簽名
String signature = request.getParameter("signature");
// 時間戮
String timestamp = request.getParameter("timestamp");
// 隨機數
String nonce = request.getParameter("nonce");
out = response.getWriter();
// 通過檢驗 signature 對請求進行校驗，若校驗成功則原樣返回 echostr，表示接入成功，否則接入失敗
if (checkSignature(signature, timestamp, nonce
logger.info("echostrresult", echostr);
out.print(echostr);
}
}
}catch(Exception e){
e.printStackTrace();
}finally{
out.close();
out = null;
}
}
/**
* 驗證簽名
*
* @param signature
* @param timestamp
* @param nonce
* @return
*/
public static boolean checkSignature(String signature, String timestamp
String[] arr = new String[] { token, timestamp, nonce };
// 將 token, timestamp, nonce 三個引數進行字典排序
sort(arr);
StringBuilder content = new StringBuilder();
for (int i = 0; i < arr.length; i++) {
content.append(arr[i]);
}
MessageDigest md = null;
String tmpStr = null;
try {
md = MessageDigest.getInstance("SHA-1");
// 將三個引數字串拼接成一個字串進行 shal 加密
byte[] digest = md.digest(content.toString().getBytes());
tmpStr = byteToStr(digest);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
content = null;
// 將sha1加密後的字串可與signature對比，標識該請求來源於微信
return tmpStr != null ? tmpStr.equals(signature.toUpperCase()) : false;
}
/**
* 將位元組陣列轉換為十六進位制字串
*
* @param digest
* @return
*/
private static String byteToStr(byte[] digest) {
String strDigest = "";
for (int i = 0; i < digest.length; i++) {
strDigest += byteToHexStr(digest[i]);
}
return strDigest;
}
/**
* 將位元組轉換為十六進位制字串
*
* @param b
* @return
*/
private static String byteToHexStr(byte b) {
char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
char[] tempArr = new char[2];
tempArr[0] = Digit[(b >>> 4) & 0X0F];
tempArr[1] = Digit[b & 0X0F];
String s = new String(tempArr);
return s;
}
public static void sort(String a[]) {
for (int i = 0; i < a.length - 1; i++) {
for (int j = i + 1; j < a.length; j++) {
if (a[j].compareTo(a[i]) < 0) {
String temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
}
}