狼翔天地

下面是我因為工作需求，需要找編碼程式，找了很久從網站上找到不錯的資料

import java.io.UnsupportedEncodingException;

import java.net.URLEncoder;

import java.net.URLDecoder;



/**

*

Title:字符編碼工具類

*

Description:

*

Copyright: flashman.com.cn Copyright (c) 2005

*

Company: flashman.com.cn

* @author: jeffzhu

* @version 1.0

*/

public class CharTools {



/**

* 轉換編碼 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;

}



/**

* 轉換編碼 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編碼

* @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解碼

* @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編碼轉字符

* @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;

}



/**

* 編碼是否有效

* @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編碼

* @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);

}



/**

* 測試

* @param args

*/

public static void main(String[] args) {



CharTools charTools = new CharTools();



String url;



url = "http://www.google.com.tw/search?hl=zh-TW&q=%E9%9F%B3%E6%A8%82&meta=";

if(charTools.isUtf8Url(url)){

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

}else{

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

}



url = "http://tw.search.yahoo.com/search?p=%E9%86%AB%E8%97%A5&ei=UTF-8&fr=sfp&fl=0&x=wrt&meta=vc%3D";

if(charTools.isUtf8Url(url)){

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

}else{

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

}

System.out.println(charTools.Utf8URLencode("音樂"));

}



}



引用自：http://www.0san.com/article/5220.htm