转码工具类

这几天为转码的事头都大了，下面一个转码工具帮了大忙，特共享如下：

/*************************************************

  Copyright (C), 2008-2009, SunSoft Team Tech. Co., Ltd.

  File name:           CharTools.java

  Description:         

  Others:         

  Function List:       

    

  History:             

   

 *************************************************/



package com.sztelecom.vbao.webapp.util;

import java.io.UnsupportedEncodingException;

import java.net.URLDecoder;



/**

 * Author: sunbeam Version: 1.0 Date: 2008-4-11

 */

public class CharTools {



	/**

	 * 转换编码 ISO-8859-1到GB2312

	 * 

	 * @param text

	 * @return

	 */

	public String ISO2GB(String text) {

		String result = "";

		try {

			result = new String(text.getBytes("ISO-8859-1"), "GB2312");

		} catch (UnsupportedEncodingException ex) {

			result = ex.toString();

		}

		return result;

	}



	/**

	 * 转换编码 GB2312到ISO-8859-1

	 * 

	 * @param text

	 * @return

	 */

	public String GB2ISO(String text) {

		String result = "";

		try {

			result = new String(text.getBytes("GB2312"), "ISO-8859-1");

		} catch (UnsupportedEncodingException ex) {

			ex.printStackTrace();

		}

		return result;

	}



	/**

	 * Utf8URL编码

	 * 

	 * @param s

	 * @return

	 */

	public 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) {

				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);

	}



	/**

	 * 测试

	 * 

	 * @param args

	 */

	public static void main(String[] args) {

		CharTools charTools = new CharTools();

		String url;

		url = "http://www.google.com/search?hl=zh-CN&newwindow=1&q=%E4%B8%AD%E5%9B%BD%E5%A4%A7%E7%99%BE%E7%A7%91%E5%9C%A8%E7%BA%BF%E5%85%A8%E6%96%87%E6%A3%80%E7%B4%A2&btnG=%E6%90%9C%E7%B4%A2&lr=";

		if (charTools.isUtf8Url(url)) {

			System.out.println(charTools.Utf8URLdecode(url));

		} else {

			System.out.println(URLDecoder.decode(url));

		}

		url = "http://www.baidu.com/baidu?word=%D6%D0%B9%FA%B4%F3%B0%D9%BF%C6%D4%DA%CF%DF%C8%AB%CE%C4%BC%EC%CB%F7&tn=myie2dg";

		if (charTools.isUtf8Url(url)) {

			System.out.println(charTools.Utf8URLdecode(url));

		} else {

			System.out.println(URLDecoder.decode(url));

		}

	}



}