URLEncoder——UTF-8编码

	/**
	 * Utf8URL编码
	 * 
	 * @param s
	 * @return
	 */
	public static String Utf8URLencode(String text) {
		StringBuffer result = new StringBuffer();
		for (int i = 0; i < text.length(); i++) {
			char c = text.charAt(i);
			if (c >= 0 && c <= 255) {
				if (c == 32)
					result.append("+");
				result.append(c);
			} else {
				byte[] b = new byte[0];
				try {
					b = Character.toString(c).getBytes("UTF-8");
				} catch (Exception ex) {
				}
				for (int j = 0; j < b.length; j++) {
					int k = b[j];
					if (k < 0)
						k += 256;
					result.append("%" + Integer.toHexString(k).toUpperCase());
				}
			}
		}
		return result.toString();
	}

	/**
	 * Utf8URL解码
	 * 
	 * @param text
	 * @return
	 */
	public String Utf8URLdecode(String text) {
		String result = "";
		int p = 0;
		if (text != null && text.length() > 0) {
			text = text.toLowerCase();
			p = text.indexOf("%e");
			if (p == -1)
				return text;
			while (p != -1) {
				result += text.substring(0, p);
				text = text.substring(p, text.length());
				if (text == "" || text.length() < 9)
					return result;
				result += CodeToWord(text.substring(0, 9));
				text = text.substring(9, text.length());
				p = text.indexOf("%e");
			}
		}
		return result + text;
	}

	/**
	 * utf8URL编码转字符
	 * 
	 * @param text
	 * @return
	 */
	private String CodeToWord(String text) {
		String result;
		if (Utf8codeCheck(text)) {
			byte[] code = new byte[3];
			code[0] = (byte) (Integer.parseInt(text.substring(1, 3), 16) - 256);
			code[1] = (byte) (Integer.parseInt(text.substring(4, 6), 16) - 256);
			code[2] = (byte) (Integer.parseInt(text.substring(7, 9), 16) - 256);
			try {
				result = new String(code, "UTF-8");
			} catch (UnsupportedEncodingException ex) {
				result = null;
			}
		} else {
			result = text;
		}
		return result;
	}

	/**
	 * 编码是否有效
	 * 
	 * @param text
	 * @return
	 */
	private boolean Utf8codeCheck(String text) {
		String sign = "";
		if (text.startsWith("%e"))
			for (int i = 0, p = 0; p != -1; i++) {
				p = text.indexOf("%", p);
				if (p != -1)
					p++;
				sign += p;
			}
		return sign.equals("147-1");
	}

	/**
	 * 是否Utf8Url编码
	 * 
	 * @param text
	 * @return
	 */
	public boolean isUtf8Url(String text) {
		text = text.toLowerCase();
		int p = text.indexOf("%");
		if (p != -1 && text.length() - p > 9) {
			text = text.substring(p, p + 9);
		}
		return Utf8codeCheck(text);
	}