import java.io.*;
import java.util.ArrayList;

public class FileCpy {
       private String fileName ;
       public ArrayList<FileCpy>fileList ;
      
       public FileCpy(String name){
            setFileName(name);
      }
       public void setFileName(String name) {
             this.fileName = name;
      }
      
       //复制文件
       public void copyFile()throws IOException{
            File first= new File("src" +"\\" +this.fileName);
            File second= new File("src" +"\\" +"bak" +"\\" +this.fileName);
             if(!first.exists()) {
                  System. out.println("内容文件不存在！" +this.fileName);
            } else{
                  FileInputStream fis = new FileInputStream(first);
                   byte[] buff = new byte[1024];
                  FileOutputStream fos = new FileOutputStream(second);
                   while (fis.read(buff) != -1) {
                        fos.write(buff);

                  }
            }
      }
       //判断src目录是否存在，建立bak目录,返回是否存在src
       public static boolean copyDir(String src,String bak){
            File srcDir= new File("src" );
            File bakDir= new File("src" +"\\" +"bak" );
             if(srcDir.exists()){
                   if(!bakDir.exists()){
                        bakDir.mkdir();
                  }
            }
             return true ;
      }
       //读取文件中的内容，将每行的文件作为动态数组中的元素
       //读取文件中的内容，将每行的文件作为动态数组中的元素
       public void reader(String FileName) throws IOException{
            FileReader file= new FileReader(new File("src"+"\\" +fileName ));
            BufferedReader br= new BufferedReader(file);
             this.fileList =new ArrayList<FileCpy>();
            String line= "";
             while((line=br.readLine())!=null){
                  FileCpy file1= new FileCpy(line);
                   fileList.add(file1);
            }
      }
       public void allCopy() throws IOException{
             if(FileCpy.copyDir( "src", "bak" )){
                   for(FileCpy fil:this.fileList){
                        fil.copyFile();
                  }
            } else{
                  System. out.println("不能找到src目录" );
            }
      }
}




import java.io.*;


public class ReadList{

      


       public static void main(String[] args) throws IOException{
            BufferedReader br = null;
            FileCpy list= new FileCpy("list.txt" );
             //捕捉异常，如果list.txt不存在，则执行catch,输出“没有找到该文件！”
             try {
                        br = new BufferedReader(new FileReader("src" +"\\" +"list.txt" ));
                        String line = "";
                        
                         while ((line = br.readLine()) != null) {
                              System. out.println(line);
                        }
                        list.reader( "list.txt");
                  } catch (FileNotFoundException e){
                        
                        System. out.println("没有找到list.txt！" );
                        e.printStackTrace();
                  }
            list.allCopy();
            
      }


}