MD5加密类方法
package com.shkj.android.utils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* md5加密
* @author admin
*/
public class MD5 {
private static final String ALGORITHM = "MD5";
private static char sHexDigits[] = { '0', '1', '2', '3', '4', '5', '6',
'7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
private static MessageDigest sDigest;
static {
try {
sDigest = MessageDigest.getInstance(ALGORITHM);
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private MD5() {
}
//调用此方法,直接传字符串即可加密
final public static String encode(String source) {
byte[] btyes = source.getBytes();
byte[] encodedBytes = sDigest.digest(btyes);
return hexString(encodedBytes);
}
public static String hexString(byte[] source) {
if (source == null || source.length <= 0) {
return "";
}
final int size = source.length;
final char str[] = new char[size * 2];
int index = 0;
byte b;
for (int i = 0; i < size; i++) {
b = source[i];
str[index++] = sHexDigits[b >>> 4 & 0xf];
str[index++] = sHexDigits[b & 0xf];
}
return new String(str);
}
}