夜光序言：
不积跬步无以至千里不积小流无以成江海~~，但是还是要夯实基础，做项目你就会知道基础不稳的后果了，调试会很烦~
正文：
package com.Genius.byteIO;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class CopyFile {
public static void main(String[] args) throws FileNotFoundException,IOException {
/*1、夜光：我们肯定需要先建立联系嗯
* 源：存在且为文件+目的地（文件可以不存在）
*
* */
File src = new File("E:/Genius/parent/test/software.txt");
File dest = new File("E:/Genius/parent/test/copysoftware.txt");
//2、我们选择流
InputStream is = new FileInputStream(src);
OutputStream os = new FileOutputStream(dest);
//3、文件拷贝+读取+写出+循环
//夜光：下面这个是数组嗯~~
byte[] flush = new byte[1024];
int len = 0;
while(-1 != (len=is.read(flush))){
//下面，我们写出
os.write(flush, 0, len);
}
os.flush(); //强制退出一下~~
//关闭，先打开的先关闭
os.close();
is.close();
}
}
package com.Genius.byteIO;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
public class CopyFile {
public static void main(String[] args){
String src = "E:/Genius/parent/test/software.txt";
String dest = "E:/Genius/parent/test/copysoftware1.txt";
try {
copyFile1(src, dest);
} catch (FileNotFoundException e) {
e.printStackTrace();
System.out.println("文件不存在~~");
} catch (IOException e) {
e.printStackTrace();
System.out.println("拷贝文件失败~~");
}
}
private static void copyFile1(String srcPath,String destPath) throws FileNotFoundException,IOException{
/*1、夜光：我们肯定需要先建立联系嗯
* 源：存在且为文件+目的地（文件可以不存在）
*
* */
File src = new File(srcPath);
File dest = new File(destPath);
//2、我们选择流
InputStream is = new FileInputStream(src);
OutputStream os = new FileOutputStream(dest);
//3、文件拷贝+读取+写出+循环
//夜光：下面这个是数组嗯~~
byte[] flush = new byte[1024];
int len = 0;
while(-1 != (len=is.read(flush))){
//下面，我们写出
os.write(flush, 0, len);
}
os.flush(); //强制退出一下~~
//关闭，先打开的先关闭
os.close();
is.close();
}
public static void copyFile(String srcPath,String destPath) throws FileNotFoundException,IOException {
}
}