package com.bjpowernode.java_learning;

import java.io.*;

​


public class D100_1_BufferedWriter {

  public static void main(String[] args) throws Exception{

    //创建带有缓冲区的字符输出流

    String address = "C:\\\\Users\\\\lenovo1\\\\Workspaces\\\\MyEclipse CI\\\\Java_learning\\\\src\\\\com\\\\bjpowernode\\\\java_learning\\\\temp1.txt";

    BufferedWriter bw = new BufferedWriter(new FileWriter(address));

    //或者如下这么写

    //BufferedWriter bw = new BufferedWriter(OutputStreamWriter(new FileOutputStream(address,true)));

    //开始写

    bw.write("jdfoishjfuji");

    //写入一个行分隔符

    bw.newLine();

    bw.write("这是一个测试的语句");

   

    //刷新

    bw.flush();

    //关闭

    bw.close();

   

    //使用BufferedReader和BufferedWriter来完成复制

    String address2 = "C:\\\\Users\\\\lenovo1\\\\Workspaces\\\\MyEclipse CI\\\\Java_learning\\\\src\\\\com\\\\bjpowernode\\\\java_learning\\\\temp2.txt";

    BufferedReader br = new BufferedReader(new FileReader(address));

    BufferedWriter bw2 = new BufferedWriter(new FileWriter(address2));

    String temp = null;

    while((temp=br.readLine())!=null) {

      bw2.write(temp);

      bw2.newLine();

    }

    bw2.flush();

    br.close();

    bw2.close();

   

  }

​


}

 

package com.bjpowernode.java_learning;

​


public class D100_2_DecoratorMode {

  public static void main(String[] args) throws Exception{

    A100 a = new A100();

    B100 b = new B100();

    a.m1();

    b.m1();

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

    //1.创建被装饰者

   

    FileReader fr = new FileReader();

    //2.创建装饰者

    BufferedReader br = new BufferedReader(fr);

   

    //3.通过执行装饰者中的方法间接去执行被装饰者中的方法

    br.close();

  }

​


}

class A100{

  public void m1() {

    System.out.println("m1");

  }

}

class B100 extends A100{

  public void m1() {

    super.m1();

    System.out.println("重写了");

  }

}

//使用BufferedReader对FileReader中的close方法进行扩展

class BufferedReader extends parent100{//BufferedReader100是装饰者


  //关联关系

  FileReader reader;//FileReader就是被装饰者


  //构造方法

  BufferedReader(FileReader reader){

    this.reader = reader;

  }

  //对FileReader中的close方法进行扩展

  public void close() {

    //扩展

    System.out.println("扩展代码1");

    reader.close();

    System.out.println("扩展代码2");

  }

}

class FileReader extends parent100{

  public void close() {

    System.out.println("guanbi");

  }

}

abstract class parent100{

  public abstract void close();

}