md5加密算法Java代码如下: import java.security.*;import java.security.spec.*; class MD5_Test...{ public final static String MD5(String s)...{ char hexDigits[] = ...{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd','e', 'f'}; try ...{ byte[] strTemp = s.getBytes(); MessageDigest mdTemp = MessageDigest.getInstance("MD5"); mdTemp.update(strTemp); byte[] md = mdTemp.digest(); int j = md.length; char str[] = new char[j * 2]; int k = 0; for (int i = 0; i < j; i++) ...{ byte byte0 = md[i]; str[k++] = hexDigits[byte0 >>>4 & 0xf]; str[k++] = hexDigits[byte0 & 0xf]; } return new String(str); } catch (Exception e) ...{ return null; } }} 主程序如下: public class md5_main ...{ public static void main (String[] args) ...{ //MD5_Test aa = new MD5_Test("password"); String string= MD5_Test.MD5("password"); System.out.println(MD5_Test.MD5("password")); System.out.println(string.equals("5f4dcc3b5aa765d61d8327deb882cf99")); }}