package com.neuedu.File;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class TestCopy1 {
public static void main(String[] args) throws IOException {
//1.找到数据源
File fsr = new File("E:/timg.jpg");
//2.通过数据源获取文件名字
String filename = fsr.getName();
//3.通过名字在另一个空间生成新文件
File newFile = new File("D:/"+filename);
newFile.createNewFile();
//4.把源数据复制新文件中
//4.1 读取源数据（1次读一个，往新文件中写一个），一直读写到源文件结束
FileReader fr = new FileReader(fsr);
FileWriter fw = new FileWriter(newFile);
int a = fr.read();
while(a!=-1){
fw.write(a);
a = fr.read();
}
fw.flush();
}
package com.neuedu.File;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class TestCopy2 {
public static void main(String[] args) throws IOException {
//1.找到数据源
File fsr = new File("E:/11.mp4");
//2.通过数据源获取文件名字
String filename = fsr.getName();
//4.1 读取源数据（1次读一个，往新文件中写一个），一直读写到源文件结束
FileInputStream fr = new FileInputStream(fsr);
FileOutputStream fw = new FileOutputStream("D:/"+filename);
int a = fr.read();
while(a!=-1){
fw.write(a);
a = fr.read();
}
fw.flush();
}
}
package com.neuedu.File;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
public class TestCopy3 {
public static void main(String[] args) throws IOException {
//1.找到数据源
File fsr = new File("E:/11.mp4");
//2.通过数据源获取文件名字
String filename = fsr.getName();
//4.1 读取源数据（1次读一个，往新文件中写一个），一直读写到源文件结束
FileInputStream fr = new FileInputStream(fsr);
FileOutputStream fw = new FileOutputStream("D:/"+filename);
byte[] b = new byte[8192];
//高速缓存
int a = fr.read(b);
while(a!=-1){
fw.write(b);
a = fr.read(b);
}
fw.flush();
}
}
package com.neuedu.File;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class TestCopy4 {
public static void main(String[] args) throws IOException {
//1.找到数据源
File fsr = new File("E:/11.mp4");
//2.通过数据源获取文件名字
String filename = fsr.getName();
//4.1 读取源数据（1次读一个，往新文件中写一个），一直读写到源文件结束
FileInputStream fr = new FileInputStream(fsr);
FileOutputStream fw = new FileOutputStream("D:/"+filename);
BufferedInputStream bis = new BufferedInputStream(fr);
BufferedOutputStream bos = new BufferedOutputStream(fw);
byte[] b = new byte[4096];
//高速缓存
int a = bis.read(b);
while(a!=-1){
bos.write(b,0,a);
a = bis.read(b);
}
bos.flush();
//3,303,390,133
//3,303,390,133
}
}