MD5Util

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import java.security.MessageDigest;

 

public class MD5Util {

 

public static String encrypt32(String encryptStr) {

MessageDigest md5;

try {

md5 = MessageDigest.getInstance("MD5");

byte[] md5Bytes = md5.digest(encryptStr.getBytes());

StringBuffer hexValue = new StringBuffer();

for (int i = 0; i < md5Bytes.length; i++) {

int val = ((int) md5Bytes[i]) & 0xff;

if (val < 16)

hexValue.append("0");

hexValue.append(Integer.toHexString(val));

}

encryptStr = hexValue.toString();

} catch (Exception e) {

throw new RuntimeException(e);

}

return encryptStr;

}

 

public static String encrypt16(String encryptStr) {

return encrypt32(encryptStr).substring(8, 24);

}

 

public static void main(String[] args) {

String encryptStr = "1111";

System.out.println(MD5Util.encrypt32(encryptStr));

System.out.println(MD5Util.encrypt16(encryptStr));

}

 

}