用java实现打印汉字的Unicode和GBK编码一览表

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
public class ChineseCharEncodingList{

private static final int MIN_INDEX = 19968;
private static final int MAX_INDEX = 40869;
private static final String CR = "\r\n";
private static final String TAB = "\t";
public void execute(String fileName) throws IOException{
   File f = new File(fileName);
   FileWriter fw = new FileWriter(f);
   fw.write("字符"+TAB+"Unicode十进制"+TAB+"Unicode十六进制"+TAB+TAB+"GBK十进制"+TAB+"GBK十六进制"+CR);
   fw.write("=================================================================================="+CR);
   int GBKCode;
   for(int i=MIN_INDEX;i<=MAX_INDEX;i++){
    GBKCode = getGBKCode(i);
    fw.write((char)i+TAB+i+TAB+TAB+Integer.toHexString(i)+TAB+TAB+TAB+GBKCode+TAB+TAB+Integer.toHexString(GBKCode)+CR);
   }
   fw.flush();
   System.out.println("Done!");
}
private int getGBKCode(int unicodeCode) throws UnsupportedEncodingException{
   char c = (char) unicodeCode;
   byte[] bytes = (c+"").getBytes("GBK");
   return ((bytes[0]&255)<<8) + (bytes[1]&255);
}
public static void main(String[] args) throws Exception{
   new ChineseCharEncodingList().execute("汉字编码一览表.txt");
}
}