Android中使用DESMD5Utils对数据进行加密

来源：互联网发布：mysql union 编辑：程序博客网时间：2024/06/05 17:39

使用该工具类，该工具类直接粘贴复制就可以

package com.example.utils;import java.security.Key;import java.security.MessageDigest;import java.security.spec.AlgorithmParameterSpec;import java.util.UUID;import javax.crypto.Cipher;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import javax.crypto.spec.IvParameterSpec;/** * DES加密和解密 * MD5加密 * @author wangfei */public class DESMD5Utils {    /**     * MD5加密     * @param str     * @param isUp      * true是否大写     * @return     */    public static String MD5(String str, boolean isUp) {        MessageDigest md5 = null;        try {            md5 = MessageDigest.getInstance("MD5");        } catch (Exception e) {            e.printStackTrace();            return "";        }        char[] charArray = str.toCharArray();        byte[] byteArray = new byte[charArray.length];        for (int i = 0; i < charArray.length; i++) {            byteArray[i] = (byte) charArray[i];        }        byte[] md5Bytes = md5.digest(byteArray);        StringBuffer hexValue = new StringBuffer();        for (int i = 0; i < md5Bytes.length; i++) {            int val = (md5Bytes[i]) & 0xff;            if (val < 16) {                hexValue.append("0");            }            hexValue.append(Integer.toHexString(val));        }        if (isUp) {            return (hexValue.toString()).toUpperCase();        } else {            return hexValue.toString();        }    }    public String ALGORITHM_DES = "DES/CBC/PKCS5Padding";    public String DESKEY = "QpOiUnYbVp3bB73Fsn7O12CX";    /**     * 默认加密方式     *      * @param data     * @return     */    public String encrypt(String data) {        String str = encrypt(DESKEY, data);        return str;    }    /**     * 默认解密方式     * @param data     * @return     */    public String decrypt(String data) {        String str = decrypt(DESKEY, data);        return str;    }    /**     * DES算法，加密     *      * @param data     *            待加密字符串     * @param key     *            加密私钥，长度不能够小于8位     * @return 加密后的字节数组，一般结合Base64编码使用     * @throws InvalidAlgorithmParameterException     * @throws Exception     */    public String encrypt(String key, String data) {        if (data == null)            return null;        try {            DESKeySpec dks = new DESKeySpec(key.getBytes());            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");            // key的长度不能够小于8位字节            Key secretKey = keyFactory.generateSecret(dks);            Cipher cipher = Cipher.getInstance(ALGORITHM_DES);            IvParameterSpec iv = new IvParameterSpec("12345678".getBytes());            AlgorithmParameterSpec paramSpec = iv;            cipher.init(Cipher.ENCRYPT_MODE, secretKey, paramSpec);            byte[] bytes = cipher.doFinal(data.getBytes());            return byte2hex(bytes);        } catch (Exception e) {            e.printStackTrace();            return data;        }    }    /**     * DES算法，解密     *      * @param data     *            待解密字符串     * @param key     *            解密私钥，长度不能够小于8位     * @return 解密后的字节数组     * @throws Exception     *             异常     */    public String decrypt(String key, String data) {        if (data == null)            return null;        try {            DESKeySpec dks = new DESKeySpec(key.getBytes());            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");            // key的长度不能够小于8位字节            Key secretKey = keyFactory.generateSecret(dks);            Cipher cipher = Cipher.getInstance(ALGORITHM_DES);            IvParameterSpec iv = new IvParameterSpec("12345678".getBytes());            AlgorithmParameterSpec paramSpec = iv;            cipher.init(Cipher.DECRYPT_MODE, secretKey, paramSpec);            return new String(cipher.doFinal(hex2byte(data.getBytes())));        } catch (Exception e) {            e.printStackTrace();            return data;        }    }    /**     * 二行制转字符串     *      * @param b     * @return     */    private static String byte2hex(byte[] b) {        StringBuilder hs = new StringBuilder();        String stmp;        for (int n = 0; b != null && n < b.length; n++) {            stmp = Integer.toHexString(b[n] & 0XFF);            if (stmp.length() == 1)                hs.append('0');            hs.append(stmp);        }        return hs.toString().toUpperCase();    }    private static byte[] hex2byte(byte[] b) {        if ((b.length % 2) != 0)            throw new IllegalArgumentException();        byte[] b2 = new byte[b.length / 2];        for (int n = 0; n < b.length; n += 2) {            String item = new String(b, n, 2);            b2[n / 2] = (byte) Integer.parseInt(item, 16);        }        return b2;    }}

、、、、、、、、、、、、、、、使用该该工具类加密，直接调用、、、、、、、、、、、、、、
我在这里直接举个简单的例子，相信大家都能够看懂
DESMD5Utils dUtils=new DESMD5Utils();
String name=”武小鹏”;
String d_name= dUtils.encrypt(name);//将name加密
那么d_name就是加密后的文件

1 0