IO stream, byte stream read / write copy

Byte stream read

package io;

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

/** 
* @author : htf 
*  Use byte stream to read file 
*/
public class TestInputStream {
	
	// Reading data from a file ： Use inputStream
	public static void read1() {
		File file=new File("E:\\temp\\a.txt");
		InputStream is=null;
		try {
			is =new FileInputStream(file);
			int a1=is.read();
			System.out.println((char)a1);
			int a2=is.read();
			System.out.println((char)a2);
			int a3=is.read();
			System.out.println((char)a3);
			int a4=is.read();
			System.out.println((char)a4);
			int a5=is.read();
			System.out.println((char)a5);
			System.out.println();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	// Trying to read data from a file ： Use inputStream
	public static void read2() {
		File file=new File("E:\\temp\\a.txt");
		InputStream is=null;
		try {
			is =new FileInputStream(file);// Node flow 
			int r=0;
			while((r=is.read())!=-1) {
				System.out.println((char)r);
			}
			System.out.println();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	public static void read3() {
		File file=new File("E:\\temp\\a.txt");
		InputStream is=null;
		try {
			is =new FileInputStream(file);
			byte[] b=new byte[5];//  new byte[1024] // Open a room to store the read data , This is the data transfer station , Also called a buffer 
			int t=0;
			while((t=is.read(b))!=-1) {
				System.out.println(new String(b, 0, t));
			}
			System.out.println();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	public static void main(String[] args) {
		//read1();
		//read2();
		read3();
	}

}

Byte stream write

package io;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

/** 
* @author : htf 
*  Use byte stream write and file copy 
* 
*/
public class TestOutputStream {
	
	//1. Output the data in the program to the hard disk file ：outPutstream  FileOutputStream
	public static void test1() {
		File parent=new File("E:\\temp");
		// Determine if the directory exists , If not , Then create a new one 
		if(!parent.exists()) {
			parent.mkdir();
		}
		File file=new File(parent, "aa.txt");
		FileOutputStream fos=null;
		try {
			fos =new FileOutputStream(file);
			fos.write(65);
			fos.write(66);
			fos.write(67);
			fos.write(68);
			fos.write(69);
			
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				fos.close();// close resource 
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally{
				try {
					fos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
	// Open buffer write 
	public static void test2() {
		File parent=new File("E:\\temp");
		// Determine if the directory exists , If not , Then create a new one 
		if(!parent.exists()) {
			parent.mkdir();
		}
		File file=new File(parent, "aaa.txt");
		FileOutputStream fos=null;
		try {
			fos =new FileOutputStream(file);
			int a=0;
			byte b[]=new byte[] {65,66,67,68,69};
			fos.write(b);// Write it all at once 
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				fos.close();// close resource 
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally{
				try {
					fos.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
	// Copy files ： Reading while writing 
	public static void test3() {
		File src=new File("E:\\temp\\a.txt");
		File dest=new File("E:\\temp\\a1.txt");
		
		FileInputStream fis=null;
		FileOutputStream fos=null;
		try {
			fis=new FileInputStream(src);
			fos=new FileOutputStream(dest);
			// Read a , Write a   
			int a=fis.read();
			fos.write(a);
			a=fis.read();
			fos.write(a);
			a=fis.read();
			fos.write(a);
			a=fis.read();
			fos.write(a);
			a=fis.read();
			fos.write(a);
			
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				fis.close();
				fos.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
	// Copy files , Write in cycles 
	public static void test4() {
		File src=new File("E:\\temp\\a.txt");
		File dest=new File("E:\\temp\\a2.txt");
		
		FileInputStream fis=null;
		FileOutputStream fos=null;
		try {
			fis=new FileInputStream(src);
			fos=new FileOutputStream(dest);
		
			int  a=0;
			while((a=fis.read())!=-1) {
				fos.write(a);
			}
			
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				fis.close();
				fos.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	// Open a buffer to read files 
	public static void test5() {
		File src=new File("E:\\temp\\a.txt");
		File dest=new File("E:\\temp\\a3.txt");
		
		FileInputStream fis=null;
		FileOutputStream fos=null;
		try {
			fis=new FileInputStream(src);
			fos=new FileOutputStream(dest);
			byte b[]=new byte[1024];
			int  a=0;
			while((a=fis.read(b))!=-1) {
				fos.write(b,0,a);
			}
			
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			try {
				fis.close();
				fos.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	public static void main(String[] args) {
		test5();
	}
}