java十六进制转成图片

[java]代码库

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.HashMap;
import java.util.Map;

/**
 * 十六进制转成图片
 * @author Administrator
 *
 */
public class Hex2Image {
    public static void main(String[] args) throws Exception {
        Hex2Image to=new Hex2Image();
        InputStream is=new FileInputStream("f://aa.txt");
        InputStreamReader isr = new InputStreamReader(is);
        BufferedReader br = new BufferedReader(isr);
        String str = null;
        StringBuilder sb = new StringBuilder();
        while ((str = br.readLine()) != null) {
            System.out.println(str);
            sb.append(str);
        }
        to.saveToImgFile(sb.toString().toUpperCase(),"f://dd.jpg");

    }
    public void saveToImgFile(String src,String output){
           if(src==null||src.length()==0){
               return;
           }
           try{
               FileOutputStream out = new FileOutputStream(new File(output));
               byte[] bytes = src.getBytes();
               for(int i=0;i<bytes.length;i+=2){
                   out.write(charToInt(bytes[i])*16+charToInt(bytes[i+1]));
               }
               out.close();
           }catch(Exception e){
               e.printStackTrace();
           }
       }
       private int charToInt(byte ch){
           int val = 0;
           if(ch>=0x30&&ch<=0x39){
               val=ch-0x30;
           }else if(ch>=0x41&&ch<=0x46){
               val=ch-0x41+10;
           }
           return val;
       }
}

//源代码片段来自云代码http://yuncode.net