读取一个文件写入另一个文件

import java.io.FileInputStream;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.OutputStream;  
import java.net.MalformedURLException;  
 
 
public class AsciiChart {  
      
    /**
     * 从本地文件11.txt读取数据写入本地文件12.txt
     *  
     * @author liyebing
     *
     */
 
     public static void main(String[] args) throws IOException {  
           
           //输入流  
            InputStream in =new FileInputStream("D:/11.doc");  
            //输出流  
            OutputStream out =new FileOutputStream("D:/12.doc",true);  
 
            try {  
                byte[] buffer=new byte[1024];  
                while(true){  
                    int byteRead=in.read(buffer);  
                    if(byteRead==-1)break;  
                    out.write(buffer,0,byteRead);  
                }               
            }  
              
            catch (MalformedURLException ex) {  
              System.err.println(args[0] + " is not a URL Java understands.");  
            }  
            finally {  
              if (in != null) in.close( );  
              if (out != null){  
                  out.close( );  
              }  
                    
            }  
          
          }  
 
}