package com.iyuba.mytablayout.utils;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* MD5校验
*
* @author 陈彤
*/
public class MD5 {
private static final char[] DIGITS = { '0', '1', '2', '3', '4', '5', '6',
'7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
public static String getMD5ofStr(String text) {
MessageDigest msgDigest = null;
try {
msgDigest = MessageDigest.getInstance("MD5");
} catch (NoSuchAlgorithmException e) {
throw new IllegalStateException(
"System doesn't support MD5 algorithm.");
}
try {
msgDigest.update(text.getBytes("utf-8"));
} catch (UnsupportedEncodingException e) {
throw new IllegalStateException(
"System doesn't support your EncodingException.");
}
byte[] bytes = msgDigest.digest();
String md5Str = new String(encodeHex(bytes));
return md5Str;
}
public static String md5_16(String text) {
return getMD5ofStr(text).substring(8, 24);
}
public static char[] encodeHex(byte[] data) {
int l = data.length;
char[] out = new char[l << 1];
int i = 0;
for (int j = 0; i < l; ++i) {
out[(j++)] = DIGITS[((0xF0 & data[i]) >>> 4)];
out[(j++)] = DIGITS[(0xF & data[i])];
}
return out;
}
}
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