MD5加密中文是要指定編碼格式:
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 {
//指定爲"UTF-8",不加參數默認的是"ISO-8859-1"
byte[] btInput = s.getBytes("UTF-8");
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;
}
}