文件输入输出流(复制文本，视频，音频，图片的多种方式)
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FileInputStream文件输入输出流
public FileInputStream(String name)
读数据的方式：
1) 一次读取一个字节：public int read();
2)一次读取一个字节数组：public int read(byte[] byt)
具体代码如下：
//一次读取一个字节public static void main(String[] args){ FileInputStream fis=new FileInputStream("F:\\A.txt"); int by=fis.read(); System.out.println((char)by); }//一次读取一个字节数组package _13.homework;import java.io.FileInputStream;import java.io.IOException;public class Demo1 { public static void main(String[] args) throws IOException { FileInputStream fis = new FileInputStream("F:\\a.txt"); byte[] by = new byte[1024]; int len = fis.read(by); System.out.println(len); System.out.println(new String(by)); }}复制文本的多种方法：
1）
package _13.homework;//用字节数组复制import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class Demo1 { public static void main(String[] args) throws IOException { FileInputStream fis = new FileInputStream("F:\\a.txt"); FileOutputStream fos = new FileOutputStream("F:\\b.txt"); byte[] by = new byte[1024]; int len = 0; while ((len = fis.read(by)) != -1) { fos.write(by, 0, len); } fis.close(); fos.close(); }}2）
package _13.homework;//一次复制一个字节import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class Demo1 { public static void main(String[] args) throws IOException { FileInputStream fis = new FileInputStream("F:\\a.txt"); FileOutputStream fos = new FileOutputStream("F:\\b.txt"); int by = 0; while ((by = fis.read()) != -1) { fos.write(by); } fis.close(); fos.close(); }}BufferedInputStream文件输入输出流
3）
package _13.homework;//一次复制一个字节import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class Demo1 { public static void main(String[] args) throws IOException { BufferedInputStream bis = new BufferedInputStream(new FileInputStream( "F:\\a.txt")); BufferedOutputStream bos = new BufferedOutputStream( new FileOutputStream("F:\\b.txt")); int by = 0; while ((by = bis.read()) != -1) { bos.write(by); bos.flush(); } bis.close(); bos.close(); }}4）
package _13.homework;//一次复制一个字节数组import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class Demo1 { public static void main(String[] args) throws IOException { BufferedInputStream bis = new BufferedInputStream(new FileInputStream( "F:\\a.txt")); BufferedOutputStream bos = new BufferedOutputStream( new FileOutputStream("F:\\b.txt")); byte[] bys=new byte[1024]; int len=0; while ((len = bis.read(bys)) != -1) { bos.write(bys,0,len); bos.flush(); } bis.close(); bos.close(); }}5）
public class CopyFileDemo10 { public static void main(String[] args) throws IOException{ BufferedReader br=new BufferedReader(new FileReader("F:\\a.txt")); BufferedWriter bw=new BufferedWriter(new FileWriter("D:\\k.txt")); char[] chs=new char[1024]; int len=0; while((len=br.read(chs))!=-1){ bw.write(chs,0,len); bw.flush(); } br.close(); bw.close(); }}6）
public class CopyFileDemo9 { public static void main(String[] args) throws IOException{ BufferedReader br=new BufferedReader(new FileReader("F:\\a.txt")); BufferedWriter bw=new BufferedWriter(new FileWriter("D:\\j.txt")); int by=0; while((by=br.read())!=-1){ bw.write(by); bw.flush(); } br.close(); bw.close(); }}7）
public static void main(String[] args) throws IOException{ FileReader fr=new FileReader("F:\\a.txt"); FileWriter fw=new FileWriter("D:\\f.txt"); char[] chs=new char[1024]; int len=0; while((len=fr.read(chs))!=-1){ fw.write(chs,0,len); fw.flush(); } fr.close(); fw.close(); }}8)
public class CopyFileDemo4 { public static void main(String[] args) throws IOException{ FileReader fr=new FileReader("F:\\a.txt"); FileWriter fw=new FileWriter("D:\\e.txt"); int by=0; while((by=fr.read())!=-1){ fw.write(by); fw.flush(); } fr.close(); fw.close(); }}9)
public class CopyFileDemo7 { public static void main(String[] args) throws IOException{ InputStreamReader isr=new InputStreamReader(new FileInputStream("F:\\a.txt")); OutputStreamWriter osw=new OutputStreamWriter(new FileOutputStream("D:\\h.txt")); int by=0; while((by=isr.read())!=-1){ osw.write(by); osw.flush(); } isr.close(); osw.close(); }}10）
public class CopyFileDemo8 { public static void main(String[] args) throws IOException{ InputStreamReader isr=new InputStreamReader(new FileInputStream("F:\\a.txt")); OutputStreamWriter osw=new OutputStreamWriter(new FileOutputStream("D:\\i.txt")); char[] chs=new char[1024]; int len=0; while((len=isr.read(chs))!=-1){ osw.write(chs,0,len); osw.flush(); } isr.close(); osw.close(); }}11)
public class CopyFileDemo11 { public static void main(String[] args) throws IOException{ BufferedReader br=new BufferedReader(new FileReader("F:\\a.txt")); BufferedWriter bw=new BufferedWriter(new FileWriter("D:\\l.txt")); String line=null; while((line=br.readLine())!=null){ int len=Integer.parseInt(line); bw.write(line,0,len); bw.flush(); } br.close(); bw.close(); }}复制图片的多种方法：
1）
public class CopyImageDmeo1 { public static void main(String[] args) throws IOException{ FileInputStream fis = new FileInputStream("F:\\jietu.JPG") ; FileOutputStream fos = new FileOutputStream("D:\\study1.JPG") ; byte[] bys = new byte[1024] ; int len = 0 ; while((len=fis.read(bys))!=-1){ fos.write(bys, 0, len) ; } fis.close() ; fos.close() ; }}2)
public class CopyImageDmeo2 { public static void main(String[] args) throws IOException{ BufferedInputStream bis = new BufferedInputStream(new FileInputStream("F:\\jietu.JPG")); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\study2.JPG")); byte[] bys=new byte[1024]; int len=0; while((len=bis.read(bys))!=-1){ bos.write(bys,0,len); bos.flush(); } bis.close(); bos.close(); }}3)
public class CopyImageDmeo3 { public static void main(String[] args) throws IOException{ BufferedInputStream bis = new BufferedInputStream(new FileInputStream("F:\\jietu.JPG")); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\study3.JPG")); int by=0; while((by=bis.read())!=-1){ bos.write(by); bos.flush(); } bis.close(); bos.close(); }}4)
public class CopyImageDmeo4 { public static void main(String[] args) throws IOException{ FileInputStream fis = new FileInputStream("F:\\jietu.JPG") ; FileOutputStream fos = new FileOutputStream("D:\\study4.JPG") ; int by=0; while((by=fis.read())!=-1){ fos.write(by); fos.flush(); } fis.close(); fos.close(); }}复制视频的多种方法：
1)
public class CopyVideoDemo4 { public static void main(String[] args) throws IOException{ FileInputStream fis = new FileInputStream("D:\\2017-9-24 11-39-19.ASF") ; FileOutputStream fos = new FileOutputStream("F:\\2017-9-24 11-39-19.ASF") ; int by=0; while((by=fis.read())!=-1){ fos.write(by); fos.flush(); } fis.close(); fos.close(); }}2)
public class CopyVideoDmeo3 { public static void main(String[] args) throws IOException{ BufferedInputStream bis = new BufferedInputStream(new FileInputStream("D:\\2017-9-24 11-39-19.ASF")); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("F:\\2017-9-24 11-39-19.ASF")); int by=0; while((by=bis.read())!=-1){ bos.write(by); bos.flush(); } bis.close(); bos.close(); }}3)
public class CopyVideoDmeo2 { public static void main(String[] args) throws IOException{ BufferedInputStream bis = new BufferedInputStream(new FileInputStream("D:\\2017-9-24 11-39-19.ASF")); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("F:\\2017-9-24 11-39-19.ASF")); byte[] bys=new byte[1024]; int len=0; while((len=bis.read(bys))!=-1){ bos.write(bys,0,len); bos.flush(); } bis.close(); bos.close(); }}4)
public class CopyVideoDmeo1 { public static void main(String[] args) throws IOException{ FileInputStream fis = new FileInputStream("D:\\2017-9-24 11-39-19.ASF") ; FileOutputStream fos = new FileOutputStream("F:\\2017-9-24 11-39-19.ASF") ; byte[] bys = new byte[1024] ; int len = 0 ; while((len=fis.read(bys))!=-1){ fos.write(bys, 0, len) ; } fis.close() ; fos.close() ; }}复制音频的多种方法：
1)
public class CopyVoiceDmeo1 { public static void main(String[] args) throws IOException{ FileInputStream fis = new FileInputStream("F:\\English.mp3") ; FileOutputStream fos = new FileOutputStream("D:\\English.mp3") ; byte[] bys = new byte[1024] ; int len = 0 ; while((len=fis.read(bys))!=-1){ fos.write(bys, 0, len) ; } fis.close() ; fos.close() ; }}2)
public class CopyVoiceDmeo2 { public static void main(String[] args) throws IOException{ BufferedInputStream bis = new BufferedInputStream(new FileInputStream("F:\\English.mp3")); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\English.mp3")); byte[] bys=new byte[1024]; int len=0; while((len=bis.read(bys))!=-1){ bos.write(bys,0,len); bos.flush(); } bis.close(); bos.close(); }}3)
public class CopyVoiceDmeo3 { public static void main(String[] args) throws IOException{ BufferedInputStream bis = new BufferedInputStream(new FileInputStream("F:\\English.mp3")); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\English.mp3")); int by=0; while((by=bis.read())!=-1){ bos.write(by); bos.flush(); } bis.close(); bos.close(); }}4)
public class CopyVoiceDemo4 { public static void main(String[] args) throws IOException{ FileInputStream fis = new FileInputStream("F:\\English.mp3") ; FileOutputStream fos = new FileOutputStream("D:\\English.mp3") ; int by=0; while((by=fis.read())!=-1){ fos.write(by); fos.flush(); } fis.close(); fos.close(); }}阅读全文
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