com.slimsmart.common.util.code.EncodeUtil.java Source code

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Here is the source code for com.slimsmart.common.util.code.EncodeUtil.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 984 2010-03-21 13:02:44Z calvinxiu $
 */
package com.slimsmart.common.util.code;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

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;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * ?????. ?Commons-Codec,Commons-Lang?JDK???.
 * 
 * @author calvin
 */
public class EncodeUtil {

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

    private static Logger logger = LoggerFactory.getLogger(EncodeUtil.class);

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

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

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

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

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

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

    /**
     * URL ?.
     */
    public static String urlEncode(String input, 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(String input) {
        return urlDecode(input, DEFAULT_URL_ENCODING);
    }

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

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

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

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

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

    /**
     * MD5?
     */
    public static String md5Encode(String input) {
        try {
            MessageDigest md5 = MessageDigest.getInstance("MD5");
            md5.update(input.getBytes());
            byte[] byteDigest = md5.digest();
            return hexEncode(byteDigest);
        } catch (NoSuchAlgorithmException e) {
            logger.error("e:{}", e);
            return null;
        }
    }

    public static String escape(String src) {
        int i;
        char j;
        StringBuffer tmp = new StringBuffer();
        tmp.ensureCapacity(src.length() * 6);

        for (i = 0; i < src.length(); i++) {

            j = src.charAt(i);

            if (Character.isDigit(j) || Character.isLowerCase(j) || Character.isUpperCase(j))
                tmp.append(j);
            else if (j < 256) {
                tmp.append("%");
                if (j < 16)
                    tmp.append("0");
                tmp.append(Integer.toString(j, 16));
            } else {
                tmp.append("%u");
                tmp.append(Integer.toString(j, 16));
            }
        }
        return tmp.toString();
    }

    public static String unescape(String src) {
        StringBuffer tmp = new StringBuffer();
        tmp.ensureCapacity(src.length());
        int lastPos = 0, pos = 0;
        char ch;
        while (lastPos < src.length()) {
            pos = src.indexOf("%", lastPos);
            if (pos == lastPos) {
                if (src.charAt(pos + 1) == 'u') {
                    ch = (char) Integer.parseInt(src.substring(pos + 2, pos + 6), 16);
                    tmp.append(ch);
                    lastPos = pos + 6;
                } else {
                    ch = (char) Integer.parseInt(src.substring(pos + 1, pos + 3), 16);
                    tmp.append(ch);
                    lastPos = pos + 3;
                }
            } else {
                if (pos == -1) {
                    tmp.append(src.substring(lastPos));
                    lastPos = src.length();
                } else {
                    tmp.append(src.substring(lastPos, pos));
                    lastPos = pos;
                }
            }
        }
        return tmp.toString();
    }

    public static String SHA1Encode(String input) throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest m = MessageDigest.getInstance("sha-1");
        m.update(input.getBytes("UTF8"));
        byte s[] = m.digest();
        return hex(s);
    }

    private static String hex(byte[] arr) {
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < arr.length; ++i) {
            sb.append(Integer.toHexString((arr[i] & 0xFF) | 0x100).substring(1, 3));
        }
        return sb.toString();
    }

    public static String securityEncode(String input)
            throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest m = MessageDigest.getInstance("SHA-256");
        m.update(input.getBytes("UTF8"));
        byte s[] = m.digest();
        return hex(s);
    }
}