银行所用的一些工具类

String joinMapValue(Map<String, String> map, char connector) {
StringBuffer b = new StringBuffer();
for (Map.Entry<String, String> entry : map.entrySet()) {
b.append(entry.getKey());
b.append('=');
if (entry.getValue() != null) {
b.append(entry.getValue());
}
b.append(connector);
}
return b.toString();

}

private String md5(String str) {

if (str == null) {
return null;
}


MessageDigest messageDigest = null;


try {
messageDigest = MessageDigest.getInstance(UnionNet.SIGN_TYPE_MD5);
messageDigest.reset();
messageDigest.update(str.getBytes(Global.MQ_MSG_CHARSET_NAME));
} catch (NoSuchAlgorithmException e) {


return str;
} catch (UnsupportedEncodingException e) {
return str;
}


byte[] byteArray = messageDigest.digest();


StringBuffer md5StrBuff = new StringBuffer();


for (int i = 0; i < byteArray.length; i++) {
if (Integer.toHexString(0xFF & byteArray[i]).length() == 1)
md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
else
md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
}


return md5StrBuff.toString();
}

public String toString() {
return ToStringBuilder.reflectionToString(this,
ToStringStyle.SHORT_PREFIX_STYLE);
}