org.iartisan.runtime.utils.MD5Util Maven / Gradle / Ivy
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package org.iartisan.runtime.utils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* md5算法
*/
public class MD5Util {
public static String MD5(String s) {
return MD5(s.getBytes());
}
public static String MD5(byte[] btInput) {
try {
char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
// 获得MD5摘要算法的 MessageDigest 对象
MessageDigest mdInst = MessageDigest.getInstance("MD5");
// 使用指定的字节更新摘要
mdInst.update(btInput);
// 获得密文
byte[] md = mdInst.digest();
// 把密文转换成十六进制的字符串形式
int j = md.length;
char result[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
result[k++] = hexDigits[byte0 >>> 4 & 0xf];
result[k++] = hexDigits[byte0 & 0xf];
}
return new String(result);
} catch (NoSuchAlgorithmException e) {
return "NoSuchAlgorithmException";
}
}
}