com.apabi.qrcode.utils.EncodeUtils.java Source code

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Here is the source code for com.apabi.qrcode.utils.EncodeUtils.java

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/**
 * Copyright (c) 2005-2009 springside.org.cn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 
 * $Id: EncodeUtils.java 862 2010-01-10 14:59:16Z calvinxiu $
 */
package com.apabi.qrcode.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.lang.StringEscapeUtils;

/**
 * ?????.
 * 
 * ?Commons-Codec,Commons-Lang?JDK???.
 * 
 * @author calvin
 */
public abstract class EncodeUtils {
    private EncodeUtils() {

    }

    private static final String DEFAULT_URL_ENCODING = "UTF-8";

    /**
     * Hex?.
     */
    public static String hexEncode(final byte[] input) {
        return Hex.encodeHexString(input);
    }

    /**
     * Hex?.
     */
    public static byte[] hexDecode(final String input) {
        try {
            return Hex.decodeHex(input.toCharArray());
        } catch (DecoderException e) {
            throw new IllegalStateException("Hex Decoder exception", e);
        }
    }

    /**
     * Base64?.
     */
    public static String base64Encode(final byte[] input) {
        return new String(Base64.encodeBase64(input));
    }

    /**
     * Base64?, URL(Base64URL?+,/=, ?RFC3548).
     */
    public static String base64UrlSafeEncode(final byte[] input) {
        return Base64.encodeBase64URLSafeString(input);
    }

    /**
     * Base64?.
     */
    public static byte[] base64Decode(final String input) {
        return Base64.decodeBase64(input);
    }

    /**
     * URL ?, EncodeUTF-8. 
     */
    public static String urlEncode(final String input) {
        return urlEncode(input, DEFAULT_URL_ENCODING);
    }

    /**
     * URL ?.
     */
    public static String urlEncode(final String input, final String encoding) {
        try {
            return URLEncoder.encode(input, encoding);
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException("Unsupported Encoding Exception", e);
        }
    }

    /**
     * URL ?, EncodeUTF-8. 
     */
    public static String urlDecode(final String input) {
        return urlDecode(input, DEFAULT_URL_ENCODING);
    }

    /**
     * URL ?.
     */
    public static String urlDecode(final String input, final String encoding) {
        try {
            return URLDecoder.decode(input, encoding);
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException("Unsupported Encoding Exception", e);
        }
    }

    /**
     * Html ?.
     */
    public static String htmlEscape(final String html) {
        return StringEscapeUtils.escapeHtml(html);
    }

    /**
     * Html ?.
     */
    public static String htmlUnescape(final String htmlEscaped) {
        return StringEscapeUtils.unescapeHtml(htmlEscaped);
    }

    /**
     * Xml ?.
     */
    public static String xmlEscape(final String xml) {
        return StringEscapeUtils.escapeXml(xml);
    }

    /**
     * Xml ?.
     */
    public static String xtmlUnescape(final String xmlEscaped) {
        return StringEscapeUtils.unescapeXml(xmlEscaped);
    }

}