J2ME测试小工具（GB2312）

作者：hunhun1981
出自：http://blog.csdn.net/hunhun1981/

部分手机不支持GB2312编码，而我公司项目的后端全部使用的是GB2312编码。于是，我就写了这个测试类。
各位也可以在代码中增加内容，可以测试一下别的编码是否被支持。

此外，这个代码中还包含了我自己写的一个UTF-8到GB2312的实现。详细情况请参考另一篇文章。
http://blog.csdn.net/hunhun1981/archive/2007/10/27/1849323.aspx

 

import  java.io.InputStream;

import  javax.microedition.lcdui.Command;
import  javax.microedition.lcdui.CommandListener;
import  javax.microedition.lcdui.Display;
import  javax.microedition.lcdui.Displayable;
import  javax.microedition.lcdui.Form;
import  javax.microedition.midlet.MIDlet;

public   class  GB2312MID  extends  MIDlet  implements  CommandListener {

    Form form;

    Command cmdQuit;

    HGB2312 gb;

     public  GB2312MID() {
        form  =   new  Form( " GB2312 " );
        cmdQuit  =   new  Command( " quit " , Command.EXIT,  0 );

        form.addCommand(cmdQuit);
        form.setCommandListener( this );

        Display.getDisplay( this ).setCurrent(form);

        test();
    }

     void  test() {

         try  {
            gb  =   new  HGB2312();
        }  catch  (Exception e) {
            e.printStackTrace();
        }

        String t  =   " GB2312编码，真是烦 " ;
         byte [] d_gb2312  =   null ;
         byte [] d_unicode  =   null ;
         byte [] d_utf8  =   null ;
         try  {
            d_gb2312  =  t.getBytes( " GB2312 " );
            form.append( " GB2312 YES " );
        }  catch  (Exception e) {
            form.append( " GB2312 NO " );
        }
         try  {
            d_unicode  =  t.getBytes( " UTF-16BE " );
            form.append( " UTF-16BE YES " );
        }  catch  (Exception e) {
            form.append( " UTF-16BE NO " );
        }

         try  {
            d_utf8  =  t.getBytes( " UTF-8 " );
            form.append( " UTF-8 YES " );
        }  catch  (Exception e) {
            form.append( " UTF-8 NO " );
        }

         try  {
            form.append( " " );
            form.append(gb.gb2utf8(d_gb2312));
        }  catch  (Exception e) {
            form.append(e.toString());
        }
    }

     public   void  commandAction(Command c, Displayable d) {
         if  (d.equals(form)) {
             if  (c.equals(cmdQuit)) {
                notifyDestroyed();
            }
        }
    }

     protected   void  destroyApp( boolean  arg0) {
    }

     protected   void  pauseApp() {
    }

     protected   void  startApp() {
    }

     public   class  HGB2312 {

         private   byte [] map  =   new   byte [ 15228 ];

         public  HGB2312()  throws  Exception {
            InputStream is  =  getClass().getResourceAsStream( " /gb2u.dat " );
            is.read(map);
            is.close();
        }

         public  String gb2utf8( byte [] gb) {
            StringBuffer sb  =   new  StringBuffer();
             int  c, h, l, ind;
             for  ( int  i  =   0 ; i  <  gb.length;) {
                 if  (gb[i]  >=   0 ) {
                    sb.append(( char ) gb[i ++ ]);
                }  else  {
                    h  =   256   +  gb[i ++ ];
                    l  =   256   +  gb[i ++ ];
                    h  =  h  -   0xA0   -   1 ;
                    l  =  l  -   0xA0   -   1 ;
                     if  (h  <   9 ) {
                        ind  =  (h  *   94   +  l)  <<   1 ;
                        c  =  (byte2Int(map[ind])  <<   8   |  byte2Int(map[ind  +   1 ]));
                        sb.append(( char ) c);
                    }  else   if  (h  >=   9   &&  h  <=   14 ) {
                        sb.append(( char )  0 );
                    }  else   if  (h  >   14 ) {
                        h  -=   6 ;
                        ind  =  (h  *   94   +  l)  <<   1 ;
                        c  =  (byte2Int(map[ind])  <<   8   |  byte2Int(map[ind  +   1 ]));
                        sb.append(( char ) c);

                    }  else  {
                        sb.append(( char )  0 );
                    }
                }
            }
             return  sb.toString();
        }

         private   int  byte2Int( byte  b) {
             if  (b  <   0 ) {
                 return   256   +  b;
            }  else  {
                 return  b;
            }
        }
    }
}

 

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