java_生成Unicode/GB2312字符编码表

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;

class UnicodeGB2312
{
    static OutputStream out = null;
    static char hexDigit[] = { '0' , '1' , '2' , '3' , '4' , '5' , '6' , '7' , '8' , '9' , 'A' , 'B' , 'C' , 'D' , 'E' , 'F' };
    static int b_out[] = { 201 , 267 , 279 , 293 , 484 , 587 , 625 , 657 , 734 , 782 , 827 , 874 , 901 , 980 , 1001 , 5590 , 8801 };
    static int e_out[] = { 216 , 268 , 280 , 294 , 494 , 594 , 632 , 694 , 748 , 794 , 836 , 894 , 903 , 994 , 1594 , 5594 , 9494 };

    public static void main (String [] a)
    {
        try
        {
            out = new FileOutputStream("unicode_gb2312.txt");
            writeCode();
            out.close();
        }
        catch (IOException e)
        {
            System.out.println(e.toString());
        }
    }

    public static void writeCode () throws IOException
    {
        CharsetEncoder gbec = Charset.forName("GBK").newEncoder();
        char [] ca = new char [1];
        CharBuffer cb = null;
        ByteBuffer gbbb = null;
        writeHeader();
        int count = 0;
        for (int i = 0 ; i < 0x010000 ; i++)
        {
            ca[0] = (char) i;
            cb = CharBuffer.wrap(ca);
            try
            {
                gbbb = gbec.encode(cb);
            }
            catch (CharacterCodingException e)
            {
                gbbb = null;
            }
            if (validGB(gbbb))
            {
                count++;
                writeHex((byte) (ca[0] >>> 8));
                writeHex((byte) (ca[0] & 0xff));
                writeString(" ");
                writeByteBuffer(gbbb , 2);
                writeString(" ");
                writeByte(gbbb.get(0));
                writeByte(gbbb.get(1));
                if (count % 5 == 0)
                    writeln();
                else
                    writeString("   ");
            }
        }
        if (count % 5 != 0)
            writeln();
        writeFooter();
        System.out.println("Number of GB characters wrote: " + count);
    }

    public static boolean validGB (ByteBuffer gbbb)
    {
        if (gbbb == null)
            return false;
        else if (gbbb.limit() != 2)
            return false;
        else
        {
            byte hi = gbbb.get(0);
            byte lo = gbbb.get(1);
            if ((hi & 0xFF) < 0xA0)
                return false;
            if ((lo & 0xFF) < 0xA0)
                return false;
            int i = (hi & 0xFF) - 0xA0;
            int j = (lo & 0xFF) - 0xA0;
            if (i < 1 || i > 94)
                return false;
            if (j < 1 || j > 94)
                return false;
            for (int l = 0 ; l < b_out.length ; l++)
            {
                if (i * 100 + j >= b_out[l] && i * 100 + j <= e_out[l])
                    return false;
            }
        }
        return true;
    }

    public static void writeHeader () throws IOException
    {
        writeString("<pre>");
        writeln();
        writeString("Uni. GB   ");
        writeGBSpace();
        writeString("   ");
        writeString("Uni. GB   ");
        writeGBSpace();
        writeString("   ");
        writeString("Uni. GB   ");
        writeGBSpace();
        writeString("   ");
        writeString("Uni. GB   ");
        writeGBSpace();
        writeString("   ");
        writeString("Uni. GB   ");
        writeGBSpace();
        writeln();
        writeln();
    }

    public static void writeFooter () throws IOException
    {
        writeString("</pre>");
        writeln();
    }

    public static void writeln () throws IOException
    {
        out.write(0x0D);
        out.write(0x0A);
    }

    public static void writeGBSpace () throws IOException
    {
        out.write(0xA1);
        out.write(0xA1);
    }

    public static void writeByteBuffer (ByteBuffer b , int l) throws IOException
    {
        int i = 0;
        if (b == null)
        {
            writeString("null");
            i = 2;
        }
        else
        {
            for (i = 0 ; i < b.limit() ; i++)
                writeHex(b.get(i));
        }
        for (int j = i ; j < l ; j++)
            writeString("  ");
    }

    public static void writeString (String s) throws IOException
    {
        if (s != null)
        {
            for (int i = 0 ; i < s.length() ; i++)
            {
                out.write((int) (s.charAt(i) & 0xFF));
            }
        }
    }

    public static void writeHex (byte b) throws IOException
    {
        out.write((int) hexDigit[(b >> 4) & 0x0F]);
        out.write((int) hexDigit[b & 0x0F]);
    }

    public static void writeByte (byte b) throws IOException
    {
        out.write(b & 0xFF);
    }
}

生成结果：UnicodeGb2312编码表