一：上码

package com.wyj.two;import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;/*** 文件得拷贝：文件输入流 和输出流* @author 86155**/
public class Demo6_文件得拷贝 {public static void main(String[] args) {File src = new File("text.txt");//源头File dext = new File("dext.txt");//目的地InputStream is = null;OutputStream os = null;try{is = new FileInputStream(src);os = new FileOutputStream(dext);byte flush[] =new byte[1024];int len = -1;while((len = is.read(flush)) != -1 ){String str = new String(flush,0,len);//System.out.println(str);byte date[] = str.getBytes();//字符串 ---->字节数组（编码）os.write(date, 0,date.length);os.flush();}}catch(FileNotFoundException e){e.printStackTrace();}catch(IOException e){e.printStackTrace();}finally{//释放资源  分别关闭  先打开的后关闭try{if(os != null ){os.close();}}catch(IOException e){e.printStackTrace();}try{if(is != null){is.close();}}catch(IOException e){e.printStackTrace();}}}
}