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Java中MD5加密一般寫法： 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | public final static String MD5(String s) {
try {
byte[] btInput = s.getBytes();
MessageDigest mdInst = MessageDigest.getInstance("MD5");
mdInst.update(btInput);
byte[] md = mdInst.digest();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < md.length; i++) {
int val = ((int) md[i]) & 0xff;
if (val < 16)
sb.append("0");
sb.append(Integer.toHexString(val));
}
return sb.toString();
} catch (Exception e) {
return null;
}
}
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因為Java默認編碼是unicode,， byte[] btInput = s.getBytes();獲得的是默認的unicode的byte數(shù)組。需要將這句改為byte[] btInput = s.getBytes("utf-8");就OK啦,。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | public final static String MD5Encoder(String s, String charset) {
try {
byte[] btInput = s.getBytes(charset);
MessageDigest mdInst = MessageDigest.getInstance("MD5");
mdInst.update(btInput);
byte[] md = mdInst.digest();
StringBuffer sb = new StringBuffer();
for (int i = 0; i < md.length; i++) {
int val = ((int) md[i]) & 0xff;
if (val < 16){
sb.append("0");
}
sb.append(Integer.toHexString(val));
}
return sb.toString();
} catch (Exception e) {
return null;
}
}
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