content: /**
   * Copyright (c) 2005-2012 springside.org.cn
   */
  package com.jeespring.common.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.StringEscapeUtils;
  
  /**
   * 封装各种格式的编码解码工具类.
   * 1.Commons-Codec的 hex/base64 编码
   * 2.自制的base62 编码
   * 3.Commons-Lang的xml/html escape
   * 4.JDK提供的URLEncoder
   * @author calvin
   * @version 2013-01-15
   */
  public class Encodes {
  
  	private static final String DEFAULT_URL_ENCODING = "UTF-8";
  	private static final char[] BASE62 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz".toCharArray();
  
  	/**
  	 * Hex编码.
  	 */
  	public static String encodeHex(byte[] input) {
  		return new String(Hex.encodeHex(input));
  	}
  
  	/**
  	 * Hex解码.
  	 */
  	public static byte[] decodeHex(String input) {
  		try {
  			return Hex.decodeHex(input.toCharArray());
  		} catch (DecoderException e) {
  			throw Exceptions.unchecked(e);
  		}
  	}
  
  	/**
  	 * Base64编码.
  	 */
  	public static String encodeBase64(byte[] input) {
  		return new String(Base64.encodeBase64(input));
  	}
  	
  	/**
  	 * Base64编码.
  	 */
  	public static String encodeBase64(String input) {
  		try {
  			return new String(Base64.encodeBase64(input.getBytes(DEFAULT_URL_ENCODING)));
  		} catch (UnsupportedEncodingException e) {
  			return "";
  		}
  	}
  
  //	/**
  //	 * Base64编码, URL安全(将Base64中的URL非法字符'+'和'/'转为'-'和'_', 见RFC3548).
  //	 */
  //	public static String encodeUrlSafeBase64(byte[] input) {
  //		return Base64.encodeBase64URLSafe(input);
  //	}
  
  	/**
  	 * Base64解码.
  	 */
  	public static byte[] decodeBase64(String input) {
  		return Base64.decodeBase64(input.getBytes());
  	}
  	
  	/**
  	 * Base64解码.
  	 */
  	public static String decodeBase64String(String input) {
  		try {
  			return new String(Base64.decodeBase64(input.getBytes()), DEFAULT_URL_ENCODING);
  		} catch (UnsupportedEncodingException e) {
  			return "";
  		}
  	}
  
  	/**
  	 * Base62编码。
  	 */
  	public static String encodeBase62(byte[] input) {
  		char[] chars = new char[input.length];
  		for (int i = 0; i < input.length; i++) {
  			chars[i] = BASE62[((input[i] & 0xFF) % BASE62.length)];
  		}
  		return new String(chars);
  	}
  
  	/**
  	 * Html 转码.
  	 */
  	public static String escapeHtml(String html) {
  		return StringEscapeUtils.escapeHtml4(html);
  	}
  
  	/**
  	 * Html 解码.
  	 */
  	public static String unescapeHtml(String htmlEscaped) {
  		return StringEscapeUtils.unescapeHtml4(htmlEscaped);
  	}
  
  	/**
  	 * Xml 转码.
  	 */
  	public static String escapeXml(String xml) {
  		return StringEscapeUtils.escapeXml10(xml);
  	}
  
  	/**
  	 * Xml 解码.
  	 */
  	public static String unescapeXml(String xmlEscaped) {
  		return StringEscapeUtils.unescapeXml(xmlEscaped);
  	}
  
  	/**
  	 * URL 编码, Encode默认为UTF-8. 
  	 */
  	public static String urlEncode(String part) {
  		try {
  			return URLEncoder.encode(part, DEFAULT_URL_ENCODING);
  		} catch (UnsupportedEncodingException e) {
  			throw Exceptions.unchecked(e);
  		}
  	}
  
  	/**
  	 * URL 解码, Encode默认为UTF-8. 
  	 */
  	public static String urlDecode(String part) {
  
  		try {
  			return URLDecoder.decode(part, DEFAULT_URL_ENCODING);
  		} catch (UnsupportedEncodingException e) {
  			throw Exceptions.unchecked(e);
  		}
  	}
  }
  