java MD5加密關於中文不一致問題

public final class MD5 {

/**

* 默認構造方法

*/

private MD5() {

}

/**

* 得到MD5加密字符串

*

* @param source 源字符串

*

* @return 加密後的字符串

*

*/

public static String getMD5(String source) {

String mdString = null;

if (source != null) {

try {

//關鍵是這句

mdString = getMD5(source.getBytes("UTF-8"));

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

}

}

return mdString;

}

/**

* 得到MD5加密字符串

*

* @param source 源字節數組

*

* @return 加密後的字符串

*/

public static String getMD5(byte[] source) {

String s = null;

char [] hexDigits = {'0', '1', '2', '3', '4', '5', '6', '7', '8',

'9', 'A', 'B', 'C', 'D', 'E', 'F'};

final int temp = 0xf;

final int arraySize = 32;

final int strLen = 16;

final int offset = 4;

try {

java.security.MessageDigest md = java.security.MessageDigest

.getInstance("MD5");

md.update(source);

byte [] tmp = md.digest();

char [] str = new char[arraySize];

int k = 0;

for (int i = 0; i < strLen; i++) {

byte byte0 = tmp[i];

str[k++] = hexDigits[byte0 >>> offset & temp];

str[k++] = hexDigits[byte0 & temp];

}

s = new String(str);

} catch (Exception e) {

e.printStackTrace();

}

return s;

}

}