import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;/*** 加密解密*/
public class AESUtil {public static String algorithm ="AES";public static String enctrypt(String content,String password){SecretKey key = getKey(algorithm,password);byte [] enCodeFormat = key.getEncoded();SecretKeySpec ss = new SecretKeySpec(password.getBytes(), algorithm);try {IvParameterSpec iv = new IvParameterSpec(password.getBytes("UTF-8"));Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");cipher.init(Cipher.ENCRYPT_MODE, ss,iv);
//            cipher.init(Cipher.ENCRYPT_MODE, ss);byte b [] = cipher.doFinal(content.getBytes());return byteToHex(b);} catch (Exception e) {LogCatLog.e("AES 加密失败",e);}return null;}public static String decrypt(byte [] content,String password){
//        SecretKey key = getKey(algorithm,password);
//        byte [] enCodeFormat = key.getEncoded();SecretKeySpec ss = new SecretKeySpec(password.getBytes(), algorithm);try {IvParameterSpec iv = new IvParameterSpec(password.getBytes("UTF-8"));Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");cipher.init(Cipher.DECRYPT_MODE, ss,iv);
//            cipher.init(Cipher.DECRYPT_MODE, ss);byte b [] = cipher.doFinal(content);return new String(b);} catch (Exception e) {LogCatLog.e("AES 解密失败",e);}return null;}/*** 使用keygenerator 依赖平台，导致Android和java加密出来的密文不一致* * @param algorithm* @param password* @return*/public static SecretKey getKey(String algorithm,String password){try {KeyGenerator gen = KeyGenerator.getInstance(algorithm);SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");secureRandom.setSeed(password.getBytes());gen.init(128, secureRandom);
//            gen.init(128);return gen.generateKey();} catch (NoSuchAlgorithmException e) {LogCatLog.e("getKey 获取加密密钥失败 ",e);e.printStackTrace();} return null;}private static String byteToHex(byte [] b){StringBuilder sb = new StringBuilder();for (int i = 0; i < b.length; i++) {String s = Integer.toHexString(b[i] & 0xFF);if(s.length()==1){s = '0'+s;}sb.append(s.toUpperCase());}return sb.toString();}public static byte[] hexStrToByte(String hexStr) {if (hexStr == null || hexStr.equals("")) {  return null;  }  hexStr = hexStr.toUpperCase();  int length = hexStr.length() / 2;  char[] hexChars = hexStr.toCharArray();  byte[] d = new byte[length];  for (int i = 0; i < length; i++) {  int pos = i * 2;  d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));  }  return d;  }private static byte charToByte(char c) {  int index = "0123456789ABCDEF".indexOf(c);if(index==-1){index = "0123456789abcdef".indexOf(c);  }return (byte)index;  }  }

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.security.MessageDigest;/*** @Description 不解释*/
public final class MD5Util {private static final char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D','B', 'C', 'D', 'B', 'O', 'T', 'H', 'O', 'F', 'Y', 'O', 'U' };/** 对文件加密 */public static String encode(File file) {FileInputStream in = null;MessageDigest md5 = null;try {in = new FileInputStream(file);FileChannel ch = in.getChannel();MappedByteBuffer byteBuffer = ch.map(FileChannel.MapMode.READ_ONLY, 0, file.length());md5 = MessageDigest.getInstance("MD5");md5.update(byteBuffer);} catch (Exception e) {e.printStackTrace();} finally {try {if(in != null)in.close();} catch (IOException e) {e.printStackTrace();}}return toHex(md5.digest());}/** 对字符串加密 */public static String encode(String arg) {if (arg == null) {arg = "";}MessageDigest md5 = null;try {md5 = MessageDigest.getInstance("MD5");md5.update(arg.getBytes("utf-8"));} catch (Exception e) {e.printStackTrace();}return toHex(md5.digest());}private static String toHex(byte[] bytes) {StringBuffer str = new StringBuffer(32);for (byte b : bytes) {str.append(hexDigits[(b & 0xf0) >> 4]);str.append(hexDigits[(b & 0x0f)]);}return str.toString();}public static String md5_3(String arg) {if (arg == null) {arg = "";}MessageDigest md5 = null;try {md5 = MessageDigest.getInstance("MD5");byte[] a = md5.digest(arg.getBytes("utf-8"));a = md5.digest(a);md5.update(a);} catch (Exception e) {e.printStackTrace();}return toHex(md5.digest());}/*** MD5加密    以byte数组表示的字符串* 结果与encode(String arg)返回的一样* * @param bytes 目标byte数组* @return MD5加密后的字符串*/public static String getMD5String(String str) {return getMD5String(str.getBytes());}public static String getMD5String(byte[] bytes) {MessageDigest md5 = null;try {md5 = MessageDigest.getInstance("MD5");md5.update(bytes);} catch (Exception e) {e.printStackTrace();}return toHex(md5.digest());}public static String toHex2(byte[] bytes){StringBuffer sb = new StringBuffer();for (int i = 0; i < bytes.length; i++) {String shex =    Integer.toHexString(bytes[i] & 0xff);if(shex.length()==1){shex='0'+shex;}sb.append(shex);}return sb.toString().toUpperCase();}public static String getMD5StringQGen(String str) {MessageDigest md5 = null;try {md5 = MessageDigest.getInstance("MD5");md5.update(str.getBytes());} catch (Exception e) {e.printStackTrace();}return toHex2(md5.digest());}
}