从SS4 摘抄来的 Encodes工具类

EncodeDemo.java

package xxx;

import org.xxx.utils.Encodes;

public class EncodeDemo {

	public static void main(String[] args) throws Exception {
	
		System.out.println(Encodes.encodeHex("你好，世界+あい/うえお@xxx.com".getBytes()));
		System.out.println(Encodes.encodeBase62("你好，世界+あい/うえお@xxx.com".getBytes()));
		System.out.println(Encodes.encodeBase64("你好，世界+あい/うえお@xxx.com".getBytes()));
		System.out.println(Encodes.encodeUrlSafeBase64("你好，世界+あい/うえお@xxx.com".getBytes()));
		
		System.out.println(Encodes.escapeHtml("<div class='hello'>div content</div>"));
		System.out.println(Encodes.escapeXml("<lily & lucy >"));
		System.out.println(Encodes.urlEncode("http://localhost:8080/app"));
		//System.out.println(Encodes.encodeHex("你好，世界".getBytes("GBK")));
		
		// e4bda0e5a5bdefbc8ce4b896e7958c2be38182e381842fe38186e38188e3818a407878782e636f6d
		// g3ahf3r2GgyQjPGhf56f58lf5Af5Cf5E2wwwkbnl
		// 5L2g5aW977yM5LiW55WMK+OBguOBhC/jgYbjgYjjgYpAeHh4LmNvbQ==
		// 5L2g5aW977yM5LiW55WMK-OBguOBhC_jgYbjgYjjgYpAeHh4LmNvbQ
		// &lt;div class='hello'&gt;div content&lt;/div&gt;
		// &lt;lily &amp; lucy &gt;
		// http%3A%2F%2Flocalhost%3A8080%2Fapp
	}

}

Encodes.java

/*******************************************************************************
 * Copyright (c) 2005, 2014 springside.github.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *******************************************************************************/
package org.xxx.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
 */
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 Hex.encodeHexString(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 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.
	 */
	public static byte[] decodeBase64(String input) {
		return Base64.decodeBase64(input);
	}

	/**
	 * 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.escapeXml11(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);
		}
	}
}

Exceptions.java

/*******************************************************************************
 * Copyright (c) 2005, 2014 springside.github.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 *******************************************************************************/
package org.xxx.utils;

import java.io.PrintWriter;
import java.io.StringWriter;

/**
 * 关于异常的工具类.
 * 
 * 参考了guava的Throwables。
 * 
 * @author calvin
 */
public class Exceptions {

	/**
	 * 将CheckedException转换为UncheckedException.
	 */
	public static RuntimeException unchecked(Throwable ex) {
		if (ex instanceof RuntimeException) {
			return (RuntimeException) ex;
		} else {
			return new RuntimeException(ex);
		}
	}

	/**
	 * 将ErrorStack转化为String.
	 */
	public static String getStackTraceAsString(Throwable ex) {
		StringWriter stringWriter = new StringWriter();
		ex.printStackTrace(new PrintWriter(stringWriter));
		return stringWriter.toString();
	}

	/**
	 * 获取组合本异常信息与底层异常信息的异常描述, 适用于本异常为统一包装异常类，底层异常才是根本原因的情况。
	 */
	public static String getErrorMessageWithNestedException(Throwable ex) {
		Throwable nestedException = ex.getCause();
		return new StringBuilder().append(ex.getMessage()).append(" nested exception is ")
				.append(nestedException.getClass().getName()).append(":").append(nestedException.getMessage())
				.toString();
	}

	/**
	 * 获取异常的Root Cause.
	 */
	public static Throwable getRootCause(Throwable ex) {
		Throwable cause;
		while ((cause = ex.getCause()) != null) {
			ex = cause;
		}
		return ex;
	}

	/**
	 * 判断异常是否由某些底层的异常引起.
	 */
	public static boolean isCausedBy(Exception ex, Class<? extends Exception>... causeExceptionClasses) {
		Throwable cause = ex;
		while (cause != null) {
			for (Class<? extends Exception> causeClass : causeExceptionClasses) {
				if (causeClass.isInstance(cause)) {
					return true;
				}
			}
			cause = cause.getCause();
		}
		return false;
	}
}