Android 常用开发工具类
16lz
2021-01-23
在开发中使用一些工具类，能让代码更加简洁，开发效率也更高，下面是我收集的Android中常用的一些开发工具类，如果大家有更好的工具，欢迎私信我。
数据管理的工具类，清理缓存数据
import java.io.File;import java.math.BigDecimal;import android.content.Context;import android.os.Environment;import android.text.TextUtils;/** * 本应用数据清除管理器 * * */public class DataCleanManager {/** * * 清除本应用内部缓存(/data/data/com.xxx.xxx/cache) * * * * @param context */public static void cleanInternalCache(Context context) {deleteFilesByDirectory(context.getCacheDir());}/** * * 清除本应用所有数据库(/data/data/com.xxx.xxx/databases) * * * * @param context */public static void cleanDatabases(Context context) {deleteFilesByDirectory(new File("/data/data/"+ context.getPackageName() + "/databases"));}/** * * 清除本应用SharedPreference(/data/data/com.xxx.xxx/shared_prefs) * * * @param context */public static void cleanSharedPreference(Context context) {deleteFilesByDirectory(new File("/data/data/"+ context.getPackageName() + "/shared_prefs"));}/** * * 按名字清除本应用数据库 * * * * @param context * @param dbName */public static void cleanDatabaseByName(Context context, String dbName) {context.deleteDatabase(dbName);}/** * * 清除/data/data/com.xxx.xxx/files下的内容 * * * * @param context */public static void cleanFiles(Context context) {deleteFilesByDirectory(context.getFilesDir());}/** * * 清除外部cache下的内容(/mnt/sdcard/android/data/com.xxx.xxx/cache) * * @param context */public static void cleanExternalCache(Context context) {if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {deleteFilesByDirectory(context.getExternalCacheDir());}}/** * * 清除自定义路径下的文件，使用需小心，请不要误删。而且只支持目录下的文件删除 * * * * @param filePath * */public static void cleanCustomCache(String filePath) {deleteFilesByDirectory(new File(filePath));}/** * * 清除本应用所有的数据 * * * * @param context * @param filepath */public static void cleanApplicationData(Context context, String... filepath) {cleanInternalCache(context);cleanExternalCache(context);cleanDatabases(context);cleanSharedPreference(context);cleanFiles(context);if (filepath == null) {return;}for (String filePath : filepath) {cleanCustomCache(filePath);}}/** * * 删除方法 这里只会删除某个文件夹下的文件，如果传入的directory是个文件，将不做处理 * * * * @param directory */private static void deleteFilesByDirectory(File directory) {if (directory.isFile()) {directory.delete();} else if (directory != null && directory.exists()&& directory.isDirectory()) {for (File item : directory.listFiles()) {deleteFilesByDirectory(item);}}}// 获取文件// Context.getExternalFilesDir() --> SDCard/Android/data/你的应用的包名/files/// 目录，一般放一些长时间保存的数据// Context.getExternalCacheDir() -->// SDCard/Android/data/你的应用包名/cache/目录，一般存放临时缓存数据public static long getFolderSize(File file) throws Exception {long size = 0;try {File[] fileList = file.listFiles();for (int i = 0; i < fileList.length; i++) {// 如果下面还有文件if (fileList[i].isDirectory()) {size = size + getFolderSize(fileList[i]);} else {size = size + fileList[i].length();}}} catch (Exception e) {e.printStackTrace();}return size;}/** * 删除指定目录下文件及目录 * * @param deleteThisPath * @param filepath * @return */public static void deleteFolderFile(String filePath, boolean deleteThisPath) {if (!TextUtils.isEmpty(filePath)) {try {File file = new File(filePath);if (file.isDirectory()) {// 如果下面还有文件File files[] = file.listFiles();for (int i = 0; i < files.length; i++) {deleteFolderFile(files[i].getAbsolutePath(), true);}}if (deleteThisPath) {if (!file.isDirectory()) {// 如果是文件，删除file.delete();} else {// 目录if (file.listFiles().length == 0) {// 目录下没有文件或者目录，删除file.delete();}}}} catch (Exception e) {e.printStackTrace();}}}/** * 格式化单位 * * @param size * @return */public static String getFormatSize(double size) {double kiloByte = size / 1024;if (kiloByte < 1) {return size + "Byte";}double megaByte = kiloByte / 1024;if (megaByte < 1) {BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";}double gigaByte = megaByte / 1024;if (gigaByte < 1) {BigDecimal result2 = new BigDecimal(Double.toString(megaByte));return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";}double teraBytes = gigaByte / 1024;if (teraBytes < 1) {BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";}BigDecimal result4 = new BigDecimal(teraBytes);return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString()+ "TB";}public static String getCacheSize(File file) throws Exception {return getFormatSize(getFolderSize(file));}}手机号，邮箱，身份证校验工具类import java.util.HashMap;import java.util.regex.Matcher;import java.util.regex.Pattern;public class VerificationUtils {private final static Pattern emailer = Pattern.compile("\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*");private static String _codeError;// wi =2(n-1)(mod 11)final static int[] wi = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4,2, 1 };// verify digitfinal static int[] vi = { 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 };private static int[] ai = new int[18];private static String[] _areaCode = { "11", "12", "13", "14", "15", "21","22", "23", "31", "32", "33", "34", "35", "36", "37", "41", "42","43", "44", "45", "46", "50", "51", "52", "53", "54", "61", "62","63", "64", "65", "71", "81", "82", "91" };private static HashMap<String, Integer> dateMap;private static HashMap<String, String> areaCodeMap;static {dateMap = new HashMap<String, Integer>();dateMap.put("01", 31);dateMap.put("02", null);dateMap.put("03", 31);dateMap.put("04", 30);dateMap.put("05", 31);dateMap.put("06", 30);dateMap.put("07", 31);dateMap.put("08", 31);dateMap.put("09", 30);dateMap.put("10", 31);dateMap.put("11", 30);dateMap.put("12", 31);areaCodeMap = new HashMap<String, String>();for (String code : _areaCode) {areaCodeMap.put(code, null);}}/** * 验证手机号 * * @param str * @return */public static boolean isMobile(String str) {Pattern p = null;Matcher m = null;boolean b = false;p = Pattern.compile("^[1][3,4,5,8,7][0-9]{9}$");// p = Pattern.compile("^((13[0-9])|(15[^4,\\D])|(18[0,5-9]))\\d{8}$");m = p.matcher(str);b = m.matches();return b;}/** * 验证邮箱 * * @param email * @return */public static boolean isEmail(String email) {if (email == null || email.trim().length() == 0)return false;return emailer.matcher(email).matches();}public static boolean isEmpty(String input) {if (input == null || "".equals(input))return true;for (int i = 0; i < input.length(); i++) {char c = input.charAt(i);if (c != ' ' && c != '\t' && c != '\r' && c != '\n') {return false;}}return true;}/** * 验证位数 * @param code * @return */public static boolean verifyLength(String code) {int length = code.length();if (length == 15 || length == 18) {return true;} else {return false;}}/** * 验证省区 * @param code * @return */public static boolean verifyAreaCode(String code) {String areaCode = code.substring(0, 2);if (areaCodeMap.containsKey(areaCode)) {return true;} else {return false;}}/** * 验证生日 * @param code * @return */public static boolean verifyBirthdayCode(String code) {String month = code.substring(10, 12);boolean isEighteenCode = (18 == code.length());if (!dateMap.containsKey(month)) {return false;}String dayCode = code.substring(12, 14);Integer day = dateMap.get(month);String yearCode = code.substring(6, 10);Integer year = Integer.valueOf(yearCode);if (day != null) {if (Integer.valueOf(dayCode) > day || Integer.valueOf(dayCode) < 1) {return false;}} else {if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {if (Integer.valueOf(dayCode) > 29|| Integer.valueOf(dayCode) < 1) {return false;}} else {if (Integer.valueOf(dayCode) > 28|| Integer.valueOf(dayCode) < 1) {return false;}}}return true;}public static boolean containsAllNumber(String code) {String str = "";if (code.length() == 15) {str = code.substring(0, 15);} else if (code.length() == 18) {str = code.substring(0, 17);}char[] ch = str.toCharArray();for (int i = 0; i < ch.length; i++) {if (!(ch[i] >= '0' && ch[i] <= '9')) {return false;}}return true;} public static boolean verify(String idcard) {if (!verifyLength(idcard)) {return false;}if (!containsAllNumber(idcard)) {return false;}String eifhteencard = "";if (idcard.length() == 15) {eifhteencard = uptoeighteen(idcard);} else {eifhteencard = idcard;}if (!verifyAreaCode(eifhteencard)) {return false;}if (!verifyBirthdayCode(eifhteencard)) {return false;}if (!verifyMOD(eifhteencard)) {return false;}return true;}public static boolean verifyMOD(String code) {String verify = code.substring(17, 18);if ("x".equals(verify)) {code = code.replaceAll("x", "X");verify = "X";}String verifyIndex = getVerify(code);if (verify.equals(verifyIndex)) {return true;}// int x=17;// if(code.length()==15){// x=14;// }return false;}public static String getVerify(String eightcardid) {int remaining = 0;if (eightcardid.length() == 18) {eightcardid = eightcardid.substring(0, 17);}if (eightcardid.length() == 17) {int sum = 0;for (int i = 0; i < 17; i++) {String k = eightcardid.substring(i, i + 1);ai[i] = Integer.parseInt(k);}for (int i = 0; i < 17; i++) {sum = sum + wi[i] * ai[i];}remaining = sum % 11;}return remaining == 2 ? "X" : String.valueOf(vi[remaining]);}public static String uptoeighteen(String fifteencardid) {String eightcardid = fifteencardid.substring(0, 6);eightcardid = eightcardid + "19";eightcardid = eightcardid + fifteencardid.substring(6, 15);eightcardid = eightcardid + getVerify(eightcardid);return eightcardid;}}sharedPreferences封装工具类
import android.content.Context;import android.content.SharedPreferences;import android.content.SharedPreferences.Editor;public class SharedPreferencesUtil {/** * 保存在手机里面的文件名 */private static final String SP_NAME = "sp_name";public static void setStringParam(Context context, String key, String value) {SharedPreferences sp = context.getSharedPreferences(SP_NAME,Context.MODE_PRIVATE);Editor edit = sp.edit();edit.putString(key, value);edit.commit();key = null;value = null;edit = null;sp = null;context = null;}/** * 保存字符串数据类型 * * @param context * @param keys * @param values */public static void setStringParams(Context context, String[] keys,String[] values) {SharedPreferences sp = context.getSharedPreferences(SP_NAME,Context.MODE_PRIVATE);Editor edit = sp.edit();for (int i = 0; i < keys.length; i++) {edit.putString(keys[i], values[i]);}keys = null;values = null;edit.commit();edit = null;sp = null;context = null;}/** * 保存所有数据类型 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法 * * @param context * @param key * @param object */public static void setParam(Context context, String key, Object object) {String type = object.getClass().getSimpleName();SharedPreferences sp = context.getSharedPreferences(SP_NAME,Context.MODE_PRIVATE);SharedPreferences.Editor editor = sp.edit();if ("String".equals(type)) {editor.putString(key, (String) object);} else if ("Integer".equals(type)) {editor.putInt(key, (Integer) object);} else if ("Boolean".equals(type)) {editor.putBoolean(key, (Boolean) object);} else if ("Float".equals(type)) {editor.putFloat(key, (Float) object);} else if ("Long".equals(type)) {editor.putLong(key, (Long) object);}key = null;object = null;editor.commit();editor = null;sp = null;context = null;}/** * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值 * * @param context * @param key * @param defaultObject * @return */public static Object getParam(Context context, String key,Object defaultObject) {String type = defaultObject.getClass().getSimpleName();SharedPreferences sp = context.getSharedPreferences(SP_NAME,Context.MODE_PRIVATE);if ("String".equals(type)) {return sp.getString(key, (String) defaultObject);} else if ("Integer".equals(type)) {return sp.getInt(key, (Integer) defaultObject);} else if ("Boolean".equals(type)) {return sp.getBoolean(key, (Boolean) defaultObject);} else if ("Float".equals(type)) {return sp.getFloat(key, (Float) defaultObject);} else if ("Long".equals(type)) {return sp.getLong(key, (Long) defaultObject);}return null;}}Service工具类import java.util.List;import android.app.ActivityManager;import android.content.Context;/** * 服务是否运行检测帮助类 * */public class ServiceUtil {/** * 判断服务是否后台运行 * * @param context * Context * @param className * 判断的服务名字 * @return true 在运行 false 不在运行 */public static boolean isServiceRun(Context mContext, String className) {boolean isRun = false;ActivityManager activityManager = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);List<ActivityManager.RunningServiceInfo> serviceList = activityManager.getRunningServices(40);int size = serviceList.size();for (int i = 0; i < size; i++) {if (serviceList.get(i).service.getClassName().equals(className) == true) {isRun = true;break;}}return isRun;}}Log日志工具类
import android.util.Log;/** * Log显示工具类 */public class LogUtil {/** * 开发 */private final static int DEVELOP = 0;/** * 测试 */private final static int TEST = 1;/** * 上线 */private final static int ONLINE = 2;/** * 当前状态 */private final static int NOWSTATE = DEVELOP;public static void info(String msg) {info("volunteer", msg);}public static void info(String TAG, String msg) {switch (NOWSTATE) {case DEVELOP:Log.i(TAG, "develop:---" + msg);break;case TEST:Log.i(TAG, "test:---" + msg);break;case ONLINE:break;}}}MD5 加密工具类
public final class MD5Utils { private static final char Digit[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; private static final byte PADDING[] = { -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; private static long state[] = new long[4]; private static long count[] = new long[2]; private static byte buffer[] = new byte[64]; private static String digestHexStr; private static byte digest[] = new byte[16]; private MD5Utils() { } /** * 没有加盐 小写输出 * @param s * @return */ public static String toMD5(String s) { md5Init(); md5Update(s.getBytes(), s.length()); md5Final(); digestHexStr = ""; for(int i = 0; i < 16; i++) digestHexStr = digestHexStr + byteHEX(digest[i]); return digestHexStr; } private static void md5Init() { count[0] = 0L; count[1] = 0L; state[0] = 0x67452301L; state[1] = 0xefcdab89L; state[2] = 0x98badcfeL; state[3] = 0x10325476L; } private static long F(long x, long y, long z) { return (x & y) | ((~x) & z); } private static long G(long x, long y, long z) { return (x & z) | (y & (~z)); } private static long H(long x, long y, long z) { return x ^ y ^ z; } private static long I(long x, long y, long z) { return y ^ (x | (~z)); } private static long FF(long l, long l1, long l2, long l3, long l4, long l5, long l6) { l += F(l1, l2, l3) + l4 + l6; l = (int)l << (int)l5 | (int)l >>> (int)(32L - l5); l += l1; return l; } private static long GG(long l, long l1, long l2, long l3, long l4, long l5, long l6) { l += G(l1, l2, l3) + l4 + l6; l = (int)l << (int)l5 | (int)l >>> (int)(32L - l5); l += l1; return l; } private static long HH(long l, long l1, long l2, long l3, long l4, long l5, long l6) { l += H(l1, l2, l3) + l4 + l6; l = (int)l << (int)l5 | (int)l >>> (int)(32L - l5); l += l1; return l; } private static long II(long l, long l1, long l2, long l3, long l4, long l5, long l6) { l += I(l1, l2, l3) + l4 + l6; l = (int)l << (int)l5 | (int)l >>> (int)(32L - l5); l += l1; return l; } private static void md5Update(byte abyte0[], int i) { byte abyte1[] = new byte[64]; int k = (int)(count[0] >>> 3) & 0x3f; if ((count[0] += i << 3) < (long)(i << 3)) count[1]++; count[1] += i >>> 29; int l = 64 - k; int j; if (i >= l) { md5Memcpy(buffer, abyte0, k, 0, l); md5Transform(buffer); for(j = l; j + 63 < i; j += 64) { md5Memcpy(abyte1, abyte0, 0, j, 64); md5Transform(abyte1); } k = 0; } else { j = 0; } md5Memcpy(buffer, abyte0, k, j, i - j); } private static void md5Final() { byte abyte0[] = new byte[8]; Encode(abyte0, count, 8); int i = (int)(count[0] >>> 3) & 0x3f; int j = i >= 56 ? 120 - i : 56 - i; md5Update(PADDING, j); md5Update(abyte0, 8); Encode(digest, state, 16); } private static void md5Memcpy(byte abyte0[], byte abyte1[], int i, int j, int k) { for(int l = 0; l < k; l++) abyte0[i + l] = abyte1[j + l]; } private static void md5Transform(byte abyte0[]) { long l = state[0]; long l1 = state[1]; long l2 = state[2]; long l3 = state[3]; long al[] = new long[16]; Decode(al, abyte0, 64); l = FF(l, l1, l2, l3, al[0], 7L, 0xd76aa478L); l3 = FF(l3, l, l1, l2, al[1], 12L, 0xe8c7b756L); l2 = FF(l2, l3, l, l1, al[2], 17L, 0x242070dbL); l1 = FF(l1, l2, l3, l, al[3], 22L, 0xc1bdceeeL); l = FF(l, l1, l2, l3, al[4], 7L, 0xf57c0fafL); l3 = FF(l3, l, l1, l2, al[5], 12L, 0x4787c62aL); l2 = FF(l2, l3, l, l1, al[6], 17L, 0xa8304613L); l1 = FF(l1, l2, l3, l, al[7], 22L, 0xfd469501L); l = FF(l, l1, l2, l3, al[8], 7L, 0x698098d8L); l3 = FF(l3, l, l1, l2, al[9], 12L, 0x8b44f7afL); l2 = FF(l2, l3, l, l1, al[10], 17L, 0xffff5bb1L); l1 = FF(l1, l2, l3, l, al[11], 22L, 0x895cd7beL); l = FF(l, l1, l2, l3, al[12], 7L, 0x6b901122L); l3 = FF(l3, l, l1, l2, al[13], 12L, 0xfd987193L); l2 = FF(l2, l3, l, l1, al[14], 17L, 0xa679438eL); l1 = FF(l1, l2, l3, l, al[15], 22L, 0x49b40821L); l = GG(l, l1, l2, l3, al[1], 5L, 0xf61e2562L); l3 = GG(l3, l, l1, l2, al[6], 9L, 0xc040b340L); l2 = GG(l2, l3, l, l1, al[11], 14L, 0x265e5a51L); l1 = GG(l1, l2, l3, l, al[0], 20L, 0xe9b6c7aaL); l = GG(l, l1, l2, l3, al[5], 5L, 0xd62f105dL); l3 = GG(l3, l, l1, l2, al[10], 9L, 0x2441453L); l2 = GG(l2, l3, l, l1, al[15], 14L, 0xd8a1e681L); l1 = GG(l1, l2, l3, l, al[4], 20L, 0xe7d3fbc8L); l = GG(l, l1, l2, l3, al[9], 5L, 0x21e1cde6L); l3 = GG(l3, l, l1, l2, al[14], 9L, 0xc33707d6L); l2 = GG(l2, l3, l, l1, al[3], 14L, 0xf4d50d87L); l1 = GG(l1, l2, l3, l, al[8], 20L, 0x455a14edL); l = GG(l, l1, l2, l3, al[13], 5L, 0xa9e3e905L); l3 = GG(l3, l, l1, l2, al[2], 9L, 0xfcefa3f8L); l2 = GG(l2, l3, l, l1, al[7], 14L, 0x676f02d9L); l1 = GG(l1, l2, l3, l, al[12], 20L, 0x8d2a4c8aL); l = HH(l, l1, l2, l3, al[5], 4L, 0xfffa3942L); l3 = HH(l3, l, l1, l2, al[8], 11L, 0x8771f681L); l2 = HH(l2, l3, l, l1, al[11], 16L, 0x6d9d6122L); l1 = HH(l1, l2, l3, l, al[14], 23L, 0xfde5380cL); l = HH(l, l1, l2, l3, al[1], 4L, 0xa4beea44L); l3 = HH(l3, l, l1, l2, al[4], 11L, 0x4bdecfa9L); l2 = HH(l2, l3, l, l1, al[7], 16L, 0xf6bb4b60L); l1 = HH(l1, l2, l3, l, al[10], 23L, 0xbebfbc70L); l = HH(l, l1, l2, l3, al[13], 4L, 0x289b7ec6L); l3 = HH(l3, l, l1, l2, al[0], 11L, 0xeaa127faL); l2 = HH(l2, l3, l, l1, al[3], 16L, 0xd4ef3085L); l1 = HH(l1, l2, l3, l, al[6], 23L, 0x4881d05L); l = HH(l, l1, l2, l3, al[9], 4L, 0xd9d4d039L); l3 = HH(l3, l, l1, l2, al[12], 11L, 0xe6db99e5L); l2 = HH(l2, l3, l, l1, al[15], 16L, 0x1fa27cf8L); l1 = HH(l1, l2, l3, l, al[2], 23L, 0xc4ac5665L); l = II(l, l1, l2, l3, al[0], 6L, 0xf4292244L); l3 = II(l3, l, l1, l2, al[7], 10L, 0x432aff97L); l2 = II(l2, l3, l, l1, al[14], 15L, 0xab9423a7L); l1 = II(l1, l2, l3, l, al[5], 21L, 0xfc93a039L); l = II(l, l1, l2, l3, al[12], 6L, 0x655b59c3L); l3 = II(l3, l, l1, l2, al[3], 10L, 0x8f0ccc92L); l2 = II(l2, l3, l, l1, al[10], 15L, 0xffeff47dL); l1 = II(l1, l2, l3, l, al[1], 21L, 0x85845dd1L); l = II(l, l1, l2, l3, al[8], 6L, 0x6fa87e4fL); l3 = II(l3, l, l1, l2, al[15], 10L, 0xfe2ce6e0L); l2 = II(l2, l3, l, l1, al[6], 15L, 0xa3014314L); l1 = II(l1, l2, l3, l, al[13], 21L, 0x4e0811a1L); l = II(l, l1, l2, l3, al[4], 6L, 0xf7537e82L); l3 = II(l3, l, l1, l2, al[11], 10L, 0xbd3af235L); l2 = II(l2, l3, l, l1, al[2], 15L, 0x2ad7d2bbL); l1 = II(l1, l2, l3, l, al[9], 21L, 0xeb86d391L); state[0] += l; state[1] += l1; state[2] += l2; state[3] += l3; } private static void Encode(byte abyte0[], long al[], int i) { int j = 0; for(int k = 0; k < i; k += 4) { abyte0[k] = (byte)(int)(al[j] & 255L); abyte0[k + 1] = (byte)(int)(al[j] >>> 8 & 255L); abyte0[k + 2] = (byte)(int)(al[j] >>> 16 & 255L); abyte0[k + 3] = (byte)(int)(al[j] >>> 24 & 255L); j++; } } private static void Decode(long al[], byte abyte0[], int i) { int j = 0; for (int k = 0; k < i; k += 4) { al[j] = b2iu(abyte0[k]) | b2iu(abyte0[k + 1]) << 8 | b2iu(abyte0[k + 2]) << 16 | b2iu(abyte0[k + 3]) << 24; j++; } } private static long b2iu(byte byte0) { return byte0 >= 0 ? byte0 : byte0 & 0xff; } private static String byteHEX(byte byte0) { char ac[] = new char[2]; ac[0] = Digit[byte0 >>> 4 & 0xf]; ac[1] = Digit[byte0 & 0xf]; return new String(ac); } public static void main(String[] args) {System.out.println(toMD5("123456"));}}可逆加密算法工具类import java.io.UnsupportedEncodingException;public class Base64Utils {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 };/** * 加密 * * @param data * @return */public static String encode(byte[] data) {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();}/** * 解密 * * @param str * @return */public static byte[] decode(String str) {try {return decodePrivate(str);} catch (UnsupportedEncodingException e) {e.printStackTrace();}return new byte[] {};}private static byte[] decodePrivate(String str)throws UnsupportedEncodingException {StringBuffer sb = new StringBuffer();byte[] data = null;data = str.getBytes("US-ASCII");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().getBytes("iso8859-1");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().getBytes("iso8859-1");b4 = base64DecodeChars[b4];} while (i < len && b4 == -1);if (b4 == -1)break;sb.append((char) (((b3 & 0x03) << 6) | b4));}return sb.toString().getBytes("iso8859-1");}}源码下载
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