Java tutorial
/** * Copyright (c) 2005-2011 springside.org.cn * * Licensed under the Apache License, Version 2.0 (the "License"); * * $Id: EncodeUtils.java 1595 2011-05-11 16:41:16Z calvinxiu $ */ package com.mawujun.utils; import java.io.UnsupportedEncodingException; import java.net.URLDecoder; import java.net.URLEncoder; import org.apache.commons.codec.DecoderException; import org.apache.commons.codec.binary.Base64; import org.apache.commons.codec.binary.Hex; import org.apache.commons.lang3.exception.ExceptionUtils; import com.mawujun.utils.string.StringEscapeUtils; /** * ??????. * * 1.Commons-Codechex/base64 ? * 2.Commons-Langxml/html escape * 3.JDK??URLEncoder * * @author calvin */ public abstract class EncodeUtils { private static final String ALPHABET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; private static final String DEFAULT_URL_ENCODING = "UTF-8"; /** * Hex?, byte[]->String. */ public static String encodeHex(byte[] input) { return Hex.encodeHexString(input); } /** * Hex?, String->byte[]. */ public static byte[] decodeHex(String input) { try { return Hex.decodeHex(input.toCharArray()); } catch (DecoderException e) { throw new IllegalStateException("Hex Decoder exception", e); } } /** * Base64?, byte[]->String. */ public static String encodeBase64(byte[] input) { return Base64.encodeBase64String(input); } /** * Base64?, URL(Base64URL?'+''/''-''_', ?RFC3548). */ public static String encodeUrlSafeBase64(byte[] input) { return Base64.encodeBase64URLSafeString(input); } /** * Base64?, String->byte[]. */ public static byte[] decodeBase64(String input) { return Base64.decodeBase64(input); } /** * Base62(0_9A_Za_z)?, long->String. */ public static String encodeBase62(long num) { return alphabetEncode(num, 62); } /** * Base62(0_9A_Za_z)?, String->long. */ public static long decodeBase62(String str) { return alphabetDecode(str, 62); } private static String alphabetEncode(long num, int base) { num = Math.abs(num); StringBuilder sb = new StringBuilder(); for (; num > 0; num /= base) { sb.append(ALPHABET.charAt((int) (num % base))); } return sb.toString(); } private static long alphabetDecode(String str, int base) { Assert.hasText(str); long result = 0; for (int i = 0; i < str.length(); i++) { result += ALPHABET.indexOf(str.charAt(i)) * Math.pow(base, i); } return result; } /** * URL ?, EncodeUTF-8. */ public static String urlEncode(String part) { try { return URLEncoder.encode(part, DEFAULT_URL_ENCODING); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } } /** * URL ?, EncodeUTF-8. */ public static String urlDecode(String part) { try { return URLDecoder.decode(part, DEFAULT_URL_ENCODING); } catch (UnsupportedEncodingException e) { throw new RuntimeException(e); } } /** * Html ?. */ public static String htmlEscape3(String html) { return StringEscapeUtils.escapeHtml3(html); } /** * Html ?. */ public static String htmlUnescape3(String htmlEscaped) { return StringEscapeUtils.unescapeHtml3(htmlEscaped); } /** * Xml ?. */ public static String xmlEscape(String xml) { return StringEscapeUtils.escapeXml(xml); } /** * Xml ?. */ public static String xmlUnescape(String xmlEscaped) { return StringEscapeUtils.unescapeXml(xmlEscaped); } }