因为平时用到了，所以记录一下不用第三方类库，用Java原生代码来实现的代码
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| private static String getMd5(String plainText) {
MessageDigest md5;
try {
md5 = MessageDigest.getInstance("MD5");
} catch (Exception e) {
System.out.println(e.toString());
e.printStackTrace();
return "";
}
byte[] str = plainText.getBytes();
byte[] md5Bytes = md5.digest(str);
StringBuilder cipherText = new StringBuilder();
for (int i = 0; i < md5Bytes.length; i++) {
int val = ((int) md5Bytes[i]) & 0xff;
if (val < 16) {
cipherText.append("0");
}
cipherText.append(Integer.toHexString(val));
}
return cipherText.toString();
}
|
