1.FileInputStream/FileOutputStream
2.BufferedInputStream/BufferedOutputStream
3.SequenceInputStream(序列流)
4.ObjectInputStream/ObjectOutputStream(對象的輸入輸出流)
5.PrintStream(打印流)

1.FileReader/FileWriter
2.BufferedReader/BufferedWriter
3.InputStremReader/OutputStreamWriter(轉(zhuǎn)換流)

·InputStreamReader
·OutputStreamWriter

1.裝飾對象和真實對象有相同的接口。這樣客戶端對象就能以和真實對象相同的方式和裝飾對象交互
2.裝飾對象可以在轉(zhuǎn)發(fā)這些請求以前或以后增加一些附加功能。這樣就確保了在運行時，不用修改給定對象的結(jié)構(gòu)就可以在外部增加附加的功能

package cn.xdian.test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.SequenceInputStream;
import java.util.Enumeration;
import java.util.Vector;
public class Demo2 {
	public static void main(String[] args) throws IOException {
		cutFile();
		//切割MP3文件
		mergeFlile();
		//合并MP3文件
	}
	//合并MP3
	public static void mergeFlile() throws IOException{
		File dir = new File("/home/gavinzhou/music_test");
		//找到文件夾下所有的MP3文件
		Vector<FileInputStream> vector = new Vector<FileInputStream>();
		File[] files = dir.listFiles();
		for (File file : files){
			if(file.getName().endsWith(".mp3")){
				vector.add(new FileInputStream(file));
			}
		}
		//通過Vector獲取迭代器
		Enumeration<FileInputStream> e = vector.elements();
		//創(chuàng)建序列流
		SequenceInputStream inputStream = new SequenceInputStream(e);
		//輸出流
		FileOutputStream fileOutputStream = new FileOutputStream("/home/gavinzhou/conbine.mp3");
		//讀取分割的MP3文件
		byte[] buf = new byte[1024];
		int length = 0 ;
		while((length = inputStream.read(buf))!=-1){
			fileOutputStream.write(buf,0,length);
		}
		//關(guān)閉流
		fileOutputStream.close();
		inputStream.close();
	}
	//切割MP3
	public static void cutFile() throws IOException{
		File file = new File("/home/gavinzhou/test.mp3");
		File dir = new File("/home/gavinzhou/music_test");
		//輸入字節(jié)流
		FileInputStream fileInputStream = new FileInputStream(file);
		//讀取文件
		byte[] buf = new byte[1024*1024];
		int length = 0;
		for (int i = 0 ; (length = fileInputStream.read(buf))!=-1 ; i++){
			FileOutputStream fileOutputStream = new FileOutputStream(new File(dir,"part"+i+".mp3"));
			fileOutputStream.write(buf,0,length);
			fileOutputStream.close();
		}
		//關(guān)閉流
		fileInputStream.close();
	}
}

package cn.xidian.test;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class Demo1 {
	public static void main(String[] args) throws IOException {
		File sourceFile = new File("/home/gavinzhou/a.txt");
		File desFile = new File("/home/gavinzhou/b.txt");
		//創(chuàng)建輸入流
		BufferedReader input = new BufferedReader(new FileReader(sourceFile));
		//創(chuàng)建輸出流
		BufferedWriter output = new BufferedWriter(new FileWriter(desFile));
		//讀取源文件,寫入到新的文件
		String line = null;
		while((line = input.readLine()) != null){
			output.write(line);
			output.newLine();
		}
		//關(guān)閉輸入輸出流
		input.close();
		output.close();
	}
}

package cn.xidian.test;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
/*
打印流可以打印任意類型的數(shù)據(jù)，打印數(shù)據(jù)之前都會先把數(shù)據(jù)轉(zhuǎn)換成字符串再進行打印
 */
class Animal{
	String name;
	String color;
	public Animal(String name,String color){
		this.name = name;
		this.color = color;
	}
	@Override
	 public String toString() {
		return "名字："+this.name+ " 顏色："+ this.color;
	}
}
public class Demo6 {
	public static void main(String[] args) throws IOException {
		/*
  File file = new File("/home/gavinzhou/a.txt");
  //創(chuàng)建打印流
  PrintStream printStream = new PrintStream(file);
  //打印任何信息到文件中
  printStream.println(97);
  printStream.println(3.14);
  printStream.println('a');
  printStream.println(true);
  Animal a = new Animal("老鼠", "黑色");
  printStream.println(a);
  //更改標(biāo)準(zhǔn)的輸入輸出
  System.setOut(printStream); //標(biāo)準(zhǔn)輸出是到屏幕上
  System.out.println("test.......");
  */
		//收集異常的日志信息。
		File logFile = new File("/home/gavinzhou/test.log");
		PrintStream logPrintStream = new PrintStream( new FileOutputStream(logFile,true) );
		try{
			int c = 4/0;
			//引起異常
			System.out.println("c="+c);
			int[] arr = null;
			System.out.println(arr.length);
		}
		catch(Exception e){
			e.printStackTrace(logPrintStream);
			//輸出到文件而不是屏幕上
		}
	}
}