16进制转图片

/**
 * 十六进制转成图片
 *
 */
public static boolean saveToImgFile(String src,String output){
    if(src==null||src.length()==0){
        return false;
    }
    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();
        return true;
    }catch(Exception e){
        e.printStackTrace();
        return false;
    }
}
private static 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;
}

使用
main:{
　　saveToImgFile(hexStr,imgpath)

}