5月18日 CMS 周五

package com.www.io;

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

public class Code {
    public static void main(String[] args) throws Exception {
        File f = new File("d:/io");

        if(f.createNewFile()){
            System.out.println("创建成功");
        }else{
            System.out.println("创建失败");
        }

//      if(f.exists()){
//          System.out.println("文件存在");
//      }else{
//          System.out.println("文件不存在");
//      }

        String[] list = f.list();

        for (String string : list) {
            System.out.println(string);
        }

//      if(f.delete()){
//          System.out.println("删除成功");
//      }else{
//          System.out.println("删除失败");
//      }

        System.out.println(f.getPath());

    }
}

package com.www.io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

public class Code01 {
    public static void main(String[] args) throws Exception {
        InputStream in = new FileInputStream("d:/io/aa.txt");

        int read = in.read();

        while (read != -1) {
            System.out.print((char)read);
            read = in.read();
        }

        in.close();
    }
}

package com.www.io;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.OutputStream;


public class Code02 {
    public static void main(String[] args) throws Exception {
        OutputStream os = new FileOutputStream("d:/io/bb.txt");

        byte[] b = new byte[]{99,97,100};

        os.write(b);
        os.close();
    }
}

package com.www.io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;



public class Code03 {
    public static void main(String[] args) throws Exception {
        InputStream is = new FileInputStream("d:/123.JPG");
        OutputStream os = new FileOutputStream("d:/io/456.JPG");

        byte[] b = new byte[1024];
        int read = is.read(b);
        while(read!=-1){
            os.write(b);
            read = is.read(b);
        }

        os.close();
        is.close();
    }
}

“你是为自己而活怎么会因为别人的几句流言蜚语就改变难道别人说你长的丑你就不要这张脸了吗那你也太没性格了”

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