base64、md5、等等加密工具类

EncryptionUtil

import java.io.UnsupportedEncodingException;import java.security.MessageDigest;import java.security.NoSuchAlgorithmException;import java.util.Arrays;/** *  * @项目名称: -- * @版权所有: -- * @技术支持: -- * @单元名称: 加密工具 * @开始时间: 2017-10-12 * @开发人员: -- */public class EncryptionUtil {private static char[] base64EncodeChars = new char[] { 'A', 'B', 'C', 'D','E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q','R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd','e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q','r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3','4', '5', '6', '7', '8', '9', '+', '/' };private static byte[] base64DecodeChars = new byte[] { -1, -1, -1, -1, -1,-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,-1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59,60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1,-1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37,38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1,-1, -1 };/** * SHA1加密 *  * @param str * @return */public static String encodeBySha1(String str) {if (null == str || 0 == str.length()) {return null;}char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9','a', 'b', 'c', 'd', 'e', 'f' };try {MessageDigest mdTemp = MessageDigest.getInstance("SHA1");mdTemp.update(str.getBytes("UTF-8"));byte[] md = mdTemp.digest();int j = md.length;char[] buf = new char[j * 2];int k = 0;for (int i = 0; i < j; i++) {byte byte0 = md[i];buf[k++] = hexDigits[byte0 >>> 4 & 0xf];buf[k++] = hexDigits[byte0 & 0xf];}return new String(buf);} catch (NoSuchAlgorithmException e) {e.printStackTrace();} catch (UnsupportedEncodingException e) {e.printStackTrace();}return null;}/** * 对字符进行排序 *  * @param str * @return */public static String sortingStr(String str) {if (null == str || 0 == str.length()) {return null;}char[] arr = str.toCharArray();Arrays.sort(arr);StringBuffer buf = new StringBuffer();for (int i = 0; i < arr.length; i++) {buf.append(arr[i]);}return buf.toString();}/** * Base64加密 *  * @param str * @return */public static String encodeByBase64(String str) {if (null == str || 0 == str.length()) {return null;}byte[] data = null;try {data = str.getBytes("UTF-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();return null;}StringBuffer sb = new StringBuffer();int len = data.length;int i = 0;int b1, b2, b3;while (i < len) {b1 = data[i++] & 0xff;if (i == len) {sb.append(base64EncodeChars[b1 >>> 2]);sb.append(base64EncodeChars[(b1 & 0x3) << 4]);sb.append("==");break;}b2 = data[i++] & 0xff;if (i == len) {sb.append(base64EncodeChars[b1 >>> 2]);sb.append(base64EncodeChars[((b1 & 0x03) << 4)| ((b2 & 0xf0) >>> 4)]);sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);sb.append("=");break;}b3 = data[i++] & 0xff;sb.append(base64EncodeChars[b1 >>> 2]);sb.append(base64EncodeChars[((b1 & 0x03) << 4)| ((b2 & 0xf0) >>> 4)]);sb.append(base64EncodeChars[((b2 & 0x0f) << 2)| ((b3 & 0xc0) >>> 6)]);sb.append(base64EncodeChars[b3 & 0x3f]);}return sb.toString();}/** * Base64解密 *  * @param str * @return */public static String decodeByBase64(String str) {if (null == str || 0 == str.length()) {return null;}StringBuffer sb = new StringBuffer();byte[] data = null;try {data = str.getBytes("UTF-8");} catch (UnsupportedEncodingException e) {e.printStackTrace();return null;}int len = data.length;int i = 0;int b1, b2, b3, b4;while (i < len) {do {b1 = base64DecodeChars[data[i++]];} while (i < len && b1 == -1);if (b1 == -1)break;do {b2 = base64DecodeChars[data[i++]];} while (i < len && b2 == -1);if (b2 == -1)break;sb.append((char) ((b1 << 2) | ((b2 & 0x30) >>> 4)));do {b3 = data[i++];if (b3 == 61)return sb.toString();b3 = base64DecodeChars[b3];} while (i < len && b3 == -1);if (b3 == -1)break;sb.append((char) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));do {b4 = data[i++];if (b4 == 61)return sb.toString();b4 = base64DecodeChars[b4];} while (i < len && b4 == -1);if (b4 == -1)break;sb.append((char) (((b3 & 0x03) << 6) | b4));}return sb.toString();}/** * MD5加密 *  * @param str * @return */public static String encodeByMD5(String str) {if (null == str || 0 == str.length()) {return null;}String resutl = null;try {MessageDigest instance = MessageDigest.getInstance("MD5");// 获取MD5算法对象byte[] digest = instance.digest(str.getBytes());// 对字符串加密,返回字节数组StringBuffer strBuffer = new StringBuffer();for (byte b : digest) {int i = b & 0xff;String hexString = Integer.toHexString(i);// 将整数转为16进制if (hexString.length() < 2) {hexString = "0" + hexString;// 如果是1位的话,补0}strBuffer.append(hexString);}resutl = strBuffer.toString();} catch (NoSuchAlgorithmException e) {e.printStackTrace();}return resutl;}public static String encodePassword(String password) {if (null == password || 0 == password.length()) {return null;}return encodeBySha1(encodeByMD5(password));}}