BufferedInputStream和BufferedOutputStream应用实例

 

BufferedInputStream和BufferedOutputStream应用实例

使用BufferedInputStream和BufferedOutputStream复制BuffferedStreamDemo.java的内容至BufferedStreamDemo.txt文件并显示输出

 

package sky;

import java.io.*;

public class BufferedStreamDemo{
    public static void main(String[] args){
        try{
            byte[] data=new byte[1];
            
            File srcFile=new File("BufferedStreamDemo.java");
            File desFile=new File("BufferedStreamDemo.txt");
            
            BufferedInputStream bufferedInputStream=new BufferedInputStream(new FileInputStream(srcFile));
            BufferedOutputStream bufferedOutputStream=new BufferedOutputStream(new FileOutputStream(desFile));
            
            System.out.println("复制文件: "+srcFile.length()+"字节");
            
            while(bufferedInputStream.read(data)!=-1){
                bufferedOutputStream.write(data);
            }
            
            //将缓冲区中的数据全部写出
            bufferedOutputStream.flush();
            
            System.out.println("复制完成");
            
            //显示输出BufferedStreamDemo.txt文件的内容
            bufferedInputStream =new BufferedInputStream(new FileInputStream(new File("BufferedStreamDemo.txt")));
            while(bufferedInputStream.read(data)!=-1){
                String str=new String(data);
                System.out.print(str);
            }
            
            bufferedInputStream.close();
            bufferedOutputStream.close();            
            
        }catch(ArrayIndexOutOfBoundsException e){
            System.out.println("using: java useFileStream src des");
            e.printStackTrace();
        }catch(IOException e){
            e.printStackTrace();
        }
    }
}

 输出结果如下:
复制文件: 1290字节
复制完成
package sky;

import java.io.*;

public class BufferedStreamDemo{
        public static void main(String[] args){
                try{
                        byte[] data=new byte[1];

                        File srcFile=new File("BufferedStreamDemo.java");
                        File desFile=new File("BufferedStreamDemo.txt");

                        BufferedInputStream bufferedInputStream=new BufferedInpu
tStream(new FileInputStream(srcFile));
                        BufferedOutputStream bufferedOutputStream=new BufferedOu
tputStream(new FileOutputStream(desFile));

                        System.out.println("????????: "+srcFile.length()+"????")
;

                        while(bufferedInputStream.read(data)!=-1){
                                bufferedOutputStream.write(data);
                        }

                        //????????????????????????
                        bufferedOutputStream.flush();

                        System.out.println("????????");

                        //????????BufferedStreamDemo.txt??????????
                        bufferedInputStream =new BufferedInputStream(new FileInp
utStream(new File("BufferedStreamDemo.txt")));
                        while(bufferedInputStream.read(data)!=-1){
                                String str=new String(data);
                                System.out.print(str);
                        }

                        bufferedInputStream.close();
                        bufferedOutputStream.close();

                }catch(ArrayIndexOutOfBoundsException e){
                        System.out.println("using: java useFileStream src des");

                        e.printStackTrace();
                }catch(IOException e){
                        e.printStackTrace();
                }
        }
}Press any key to continue...