考试第四题

Posted 2022-07-02 bichen-01

 

 

 

 

 

package test04;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;

public class Demo 
    //在C盘下创建一个文件，名称为javabigdata,在此文件夹下创建一个a.txt的文件
    //，并写入如下内容：I love china,I love beiijng,the Beijing
    //is the capatial of China.，
    //然后将a.txt复制到此文件夹下为b.txt

    //1、地址   2、读取 Read FileRead   BUfferRead 输出 Write FileOut  BufferWriter
    
    
    public static void main(String[] args) 
        
        
        Reader re = null;
        BufferedReader br = null;
        Writer wi = null;
        BufferedWriter bw = null;
        
        try 
            re = new FileReader("C:/javabigdata/a.txt");
            br = new BufferedReader(re);
            try 
                wi = new FileWriter("C:/javabigdata/b.txt");
                bw = new BufferedWriter(wi);
             catch (IOException e1) 
                // TODO Auto-generated catch block
                e1.printStackTrace();
            
            String line = "";
            try 
                while((line=br.readLine())!=null) 
                    
                    bw.write(line);
                    System.out.println("复制成功");
                    bw.flush();
                    
                
             catch (IOException e) 
                // TODO Auto-generated catch block
                e.printStackTrace();
            
         catch (FileNotFoundException e) 
            // TODO Auto-generated catch block
            e.printStackTrace();
        finally 
            
            try 
                bw.close();
                wi.close();
                br.close();
                re.close();
             catch (IOException e) 
                // TODO Auto-generated catch block
                e.printStackTrace();