JAVA自建工具类——使用MessageDigest将字符串转换为MD5
使用MessageDigest将字符串转换为MD5
import java.security.MessageDigest;
public class StringMD5 {
public static String getMD5ofStr(String srcStr) throws Exception {
if (srcStr == null)
return null;
byte[] strByte = srcStr.getBytes("UTF-8");
return getMD5ofByte(strByte);
}
public static String getMD5ofByte(byte[] strByte) throws Exception {
char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f' };
MessageDigest md5 = MessageDigest.getInstance("MD5");
byte[] bs = md5.digest(strByte);
char[] str = new char[32];
int k = 0;
for (int i = 0; i < 16; ++i) {
byte byte0 = bs[i];
str[(k++)] = hexDigits[(byte0 >>> 4 & 0xF)];
str[(k++)] = hexDigits[(byte0 & 0xF)];
}
return new String(str);
}
}