package oop.io.file;

import java.io.File;
import java.io.IOException;

public class FileDemo {
    /**
     * 创建文件夹
     */
    public static void createFile(File file) {

        /**
         * 判断是否有文件
         */
        if (file.exists()) {
            if (file.isFile()) {
                System.out.println("是文件");
            } else if (file.isDirectory()) {
                System.out.println("是文件夹");
            }
        } else
        /**
         * 没有文件夹
         */
        {

            try {
                file.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }

    /**
     * 查看文件家
     * 
     */
    public static void getFileInfo(File file) {
        System.out.println("文件名" + file.getName());
        System.out.println("文件大小" + file.length());
        System.out.println("文件相对路径" + file.getPath());
        System.out.println("文件绝对路径" + file.getAbsolutePath());

    }
    
    /**
     * 删除文件
     * 
     */
    public static void deleteFile(File file){
        if(file.exists()){
             if (file.isFile()) {
                file.delete();
                System.out.println("文件已删除");
            }
            
        }else{
            
            System.out.println("文件不存在");
        }
        
        
    }
}

package oop.io.file;

import java.io.File;

public class Test {
  public static void main(String[] args) {
    File file=new File("D://holly.txt");
    FileDemo.createFile(file);      
    FileDemo.getFileInfo(file);      
    //FileDemo.deleteFile(file); 
      
}
}

package oop.io.inoutstram;

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;

import oop.io.file.FileDemo;

public class InOutStream {
    public static void main(String[] args) throws IOException {
        File file=new File("D://bizhi.jpg");
        /*readerFile(file); 
        writeFile(file);*/
        File file2=new File("D://ouchanglu.jpg");
        FileDemo.createFile(file2);
        copyPater(file2, file);
    }
    
    /**
     * 文件复制粘贴
     */
    /**
     * 字节输入流，写的
     * @throws IOException 
     * 
     */
   public static void copyPater(File file2,File file) throws IOException{
       
       InputStream inputStream=new FileInputStream(file);
       byte[] bsw=new byte[(int) file.length()];
       inputStream.read(bsw);
       
       OutputStream outputstream=new FileOutputStream(file2);
       outputstream.write(bsw);
       
       inputStream.close();
       outputstream.close();
       
       
   }
    
    
    
    
   public static void writeFile(File file) throws IOException{
      //创建输入流
       OutputStream outputStream=new FileOutputStream(file);
          
          String str="abcdefghijklmnopqrst";
          byte[] bsw=str.getBytes();
          outputStream.write(bsw);
          outputStream.close();
   }
    
   /**
    * 
    * 
    * 读取文件流
    */
    
   public static void readerFile(File file) throws IOException{
      
       InputStream inputStream=new FileInputStream(file);
        
       byte[] bws=new byte[(int) file.length()];
          inputStream.read(bws);       
       for (byte b : bws) {
        System.out.print(b);
    }   
       inputStream.close();
   }
   
   
   
   
}

package oop.io.readerwrite;

import java.io.File;
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 ReadQWrite {
   public static void main(String[] args) throws IOException {
        copy("D://holly.txt", "D://ouchanglu.txt");
}
 /**
  * 复制粘贴  
 * @throws IOException 
  */
    
   public static void copy(String path2,String path) throws IOException{
      Reader reader=new FileReader(path2);
      char[] cs=new char[path2.length()];
      reader.read(cs);
      Writer writer=new FileWriter(path);
      writer.write(cs);
      reader.close();
      writer.close();
   }
   
   
   
    
}

package oop.io.readerwrite;

import java.io.File;
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 ReadQWrite {
   public static void main(String[] args) throws IOException {
        copy("D://holly.txt", "D://ouchanglu.txt");
}
 /**
  * 复制粘贴  
 * @throws IOException 
  */
    
   public static void copy(String path2,String path) throws IOException{
      Reader reader=new FileReader(path2);
      char[] cs=new char[path2.length()];
      reader.read(cs);
      Writer writer=new FileWriter(path);
      writer.write(cs);
      reader.close();
      writer.close();
   }
   
   
   
    
}

package oop.io.readerwrite;

import java.io.File;
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 ReadQWrite {
   public static void main(String[] args) throws IOException {
        copy("D://holly.txt", "D://ouchanglu.txt");
}
 /**
  * 复制粘贴  
 * @throws IOException 
  */
    
   public static void copy(String path2,String path) throws IOException{
      Reader reader=new FileReader(path2);
      char[] cs=new char[path2.length()];
      reader.read(cs);
      Writer writer=new FileWriter(path);
      writer.write(cs);
      reader.close();
      writer.close();
   }
   
   
   
    
}