&#x 格式数据转换

import java.io.UnsupportedEncodingException;

/**
 * @(#)Convert.java
 * 
 *                
 * 
 * @author [e-mail]
 * @version 1.00 2013/5/22
 */

public class Convert {

	private int hex2oct(char p) throws UnsupportedEncodingException {
		char hexData[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
				'A', 'B', 'C', 'D', 'E', 'F' };
		for (int i = 0; i < hexData.length; i++) {
			if (Character.toUpperCase(hexData[i]) == p) {
				return i;
			}
		}
		throw new UnsupportedEncodingException("Unsupported Hex Encoding");

	}
/***
 * 
 * @param p1
 * @param p2
 * @param p3
 * @param p4
 * @param charset
 * @return
 * @throws UnsupportedEncodingException
 */
	private String hexString2String(char p1, char p2, char p3, char p4, String charset)
			throws UnsupportedEncodingException {

		byte first = (byte) (hex2oct(p1) * 16 + hex2oct(p2));
		byte second = (byte) (hex2oct(p3) * 16 + hex2oct(p4));
		byte[] bytes = new byte[2];
		bytes[0] = first;
		bytes[1] = second;

		return new String(bytes, charset);

	}

	/**
	 * &#x7EC4;&#x7EC7;&#x4E13;&#x7EBF;&#x5F00;&#x901A;
	 * 
	 * @throws UnsupportedEncodingException
	 */
  public	String doDecoder(String html, String charset)
			throws UnsupportedEncodingException {
		int size = html.length();
		String result = "";
		for (int i = 0; i < size; i++) {
			char c = html.charAt(i);
			if (c == '&') {
				if ((i + 7) < size) {
					if (html.charAt(i + 1) == '#' && Character.toUpperCase(html.charAt(i + 2)) == 'X') {
						char p1 = html.charAt(i + 3);
						char p2 = html.charAt(i + 4);
						char p3 = html.charAt(i + 5);
						char p4 = html.charAt(i + 6);
						String s = hexString2String(p1, p2, p3, p4, charset);
						result += s;
						i += 7;
					}
				} else {
					result += c;
					continue;
				}
			} else {
				result += c;
			}
		}
		return result;
	}

	public static void main(String[] args) throws Exception {

		Convert c = new Convert();
		String s = c.doDecoder(
				"我们abcd&#x7EC4;&#x7EC7;&#x4E13;&#x7EBF;&#x5F00;fs;&&#x901A;fs", "utf16");
		 
		System.out.println(s);
		 
	}
}