Java 实现32位MD5加密

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MD5介绍【链接】

Java代码实现

public class Md5Util {
private String Md5Util(String s) {
try {
MessageDigest md = MessageDigest.getInstance("MD5");
byte[] bytes = md.digest(s.getBytes("utf-8"));
return toHex(bytes);
} catch (Exception e) {
throw new RuntimeException(e);
}
} private static String toHex(byte[] bytes) { final char[] HEX_DIGITS = "0123456789abcdef".toCharArray();
StringBuilder ret = new StringBuilder(bytes.length * 2);
for (int i = 0; i < bytes.length; i++) {
ret.append(HEX_DIGITS[(bytes[i] >> 4) & 0x0f]);
ret.append(HEX_DIGITS[bytes[i] & 0x0f]);
}
return ret.toString();
}
}