Character Set Tool class

Package Test;import Java.io.unsupportedencodingexception;import Java.net.urlencoder;import java.net.URLDecoder;    public class Chartools {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;    public string Gb2iso (string text) {string result = "";    try {result = new String (text.getbytes ("GB2312"), "iso-8859-1");    } catch (Unsupportedencodingexception ex) {ex.printstacktrace ();  } return result;    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 ();    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;    } 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;    } public static Boolean IsValidUtf8 (byte[] b, int amaxcount) {int llen = b.length, lcharcount = 0;       for (int i = 0; i < Llen && Lcharcount < Amaxcount; ++lcharcount) {byte lbyte = b[i++]; if (lbyte >= 0) continue;      >=0 is normal ASCII if (Lbyte < (byte) 0xc0 | | lbyte > (BYTE) 0xfd) return false; int lCount = lbyte > (byte) 0xfc? 5:lbyte > (byte) 0xf8? 4:lbyte > (byte) 0xf0? 3:lbyte > (byte) 0xe0?      2:1;      if (i + LCount > Llen) return false;    for (int j = 0; j < LCount; ++j, ++i) if (B[i] >= (byte) 0xc0) return false;  } return true; } 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"); }  /**   * ???   Utf8url????    * @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);   }  /**   * ????    * @param args */public static void main (string[] args) {Chartools chartools = new Chartools ();    CHARTOOLS.ISO2GB ("Yabushan");    Chartools.gb2iso ("Yabushan");    TODO 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= "; Chartools.utf8urlencode (UrL);   Chartools.utf8urldecode (URL);                Chartools.utf8codecheck (URL);    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)); }  }}

　　

Character Set Tool class