技術標籤：Javajava

我這裡只是提供簡單的成品程式碼，不明白的點請看我前面寫的有關IO的基礎知識，通常使用“程式碼2”

程式碼1（節點流）：

import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class CopyFile {
	public static void main(String[] args) {
		File f1 = new File("src/foryou/IO/hello3.txt"
 
);
		File f2 = new File("src/foryou/IO/hello3_copy.txt");
		FileReader read = null;
		FileWriter write = null;
		try {
			read = new FileReader(f1);
			write = new FileWriter(f2);
			char c[] =new char[10];
			int len;
			while((len = read.read(c)) != -1) {
				write.write(c, 0, len);
			}
		} catch
 
 (Exception e) {
			System.out.println(e);
		}finally {
			try {
				if(write!=null) {
					write.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
			try {
				if(read!=null) {
					read.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		System.out.
 
println("copy is completed");
		
	}
}

程式碼2：（緩衝流）

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 FileReder_WriterCopyFile {
	public static void main(String[] args) {
		File f1 = new File("src/foryou/IO/hello3.txt");
		File f2 = new File("src/foryou/IO/hello3_copy.txt");
		BufferedReader bread = null;
		BufferedWriter bwrite = null;
		try {
			bread = new BufferedReader(new FileReader(f1));
			bwrite = new BufferedWriter(new FileWriter(f2));
			char c[] =new char[10];
			String data;
			//以一行為單位進行讀取
			while((data = bread.readLine()) != null) {
				bwrite.write(data);
			}
		} catch (Exception e) {
			System.out.println(e);
		}finally {
			try {
				if(bwrite!=null) {
					bwrite.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
			try {
				if(bread!=null) {
					bread.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		System.out.println("copy is completed");
		
	}
}

結果：