这是一个别人写的Unicode 汉字与GB内码的转换程序,使用时现将前面的码表存成文件,例如table.txt
创建一个GBUnicode实例,new GBUnicode("table.txt")
以后调用GB2Uni和Uni2GB作内码转换.注意GB内码是用两个字节表示的.希望对你有所帮助。
import java.io.*;
import java.util.Hashtable;
class GBUnicode{
byte high[]=new byte[6763],low[]=new byte[6763];
char unichar[]=new char[6763];
Hashtable UniGB;
public GBUnicode(String table_file)throws IOException
{
//BufferedInputStream tables=new BufferedInputStream (new FileInnputStream(table_file));
DataInputStream tables=new DataInputStream (new FileInputStream((table_file));
int i,n=0;
byte b,bl,bh,num[]=new byte[20];
UniGB=new Hashtable(7000,1);
while (n<6763 ){
do
{
bh=(byte)tables.read();
}while ((char)bh<=' ');
//find first non-blank char
bl=(byte)tables.read();
high[n]=bh;
low[n]=bl;
do
{
b=(byte)tables.read();
}while (b!=(byte)':');
//find ':'
do
{
b=(byte)tables.read();
}while ((char)b<=' ');
//find next non-blank char to reaad as number
i=0;
while ((char)b>='0' &&
(char)b<='9'){
num[i++]=b;
b=(byte)tables.read();
}
unichar[n]=(char)Integer.parseInt(new String(num,0,0,i))
if (UniGB.get(new Character(unichar[n]))!= null)
System.out.println("Duplicated : "+unichar[n]);
UniGB.put(new Character(unichar[n]),new Integer
);
n=n+1;
}
tables.close();
}
private int getGBindex(byte high,byte low){
int i,j;
i=high-(byte)0xb0;
j=low-(byte)0xa1;
if (i <39) {// L1 Chinese
if (j<0 || j>94)
return -1;
return (i*94+j);
}
else
if (i==39) {//one of the last 89 L1 Chinese
if (j<0 || j>89)
return -1;
return (i*94+j);
}
else
{//L2 Chinese
if (j<0 || j>94)
return -1;
return (i*94+j-5);
}
}
public byte[] Uni2GB(char unicode) {
Integer index=(Integer)UniGB.get(new Character(unicode));
if (index==null)
return null;
byte ch[]=new byte[2];
ch[0]=high[index.intValue()];
ch[1]=low[index.intValue()];
return ch;
}
public char GB2Uni(byte high, byte low) {
int index=getGBindex(high,low);
if (index ==-1) //not GB Chinese
return 0;
return(unichar[index]);
}
}
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