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;
/**
* 封装各种格式的编码解码工具类.
*
* 1.Commons-Codec的hex/base64 编码
* 2.Commons-Lang的xml/html escape
* 3.JDK提供的URLEncoder
*
*/
public abstract class EncodeUtils {
private static final String ALPHABET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
private static final String DEFAULT_URL_ENCODING = "UTF-8";
/**
* Hex编码, byte[]->String.
*/
public static String encodeHex(byte[] input) {
return Hex.encodeHexString(input);
}
/**
* Hex解码, 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编码, byte[]->String.
*/
public static String encodeBase64(byte[] input) {
return Base64.encodeBase64String(input);
}
/**
* 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.encodeBase64URLSafeString(input);
}
/**
* Base64解码, String->byte[].
*/
public static byte[] decodeBase64(String input) {
return Base64.decodeBase64(input);
}
/**
* Base62(0_9A_Za_z)编码数字, long->String.
*/
public static String encodeBase62(long num) {
return alphabetEncode(num, 62);
}
/**
* Base62(0_9A_Za_z)解码数字, 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) {
AssertUtils.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 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 ExceptionUtils.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 ExceptionUtils.unchecked(e);
}
}
/**
* Html 转码.
*/
public static String htmlEscape(String html) {
return StringEscapeUtils.escapeHtml(html);
}
/**
* Html 解码.
*/
public static String htmlUnescape(String htmlEscaped) {
return StringEscapeUtils.unescapeHtml(htmlEscaped);
}
/**
* Xml 转码.
*/
public static String xmlEscape(String xml) {
return StringEscapeUtils.escapeXml(xml);
}
/**
* Xml 解码.
*/
public static String xmlUnescape(String xmlEscaped) {
return StringEscapeUtils.unescapeXml(xmlEscaped);
}
}