java 關於檔案剪下的操作程式碼

方法一

package Onenine;


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;


public class Test {


public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner in = new Scanner(System.in);
String s =in.next();
String str1 =in.next();
String str2 = in.next();
File f1 = new File(s+"\\"+str1);
File f2 = new File(str2+"\\"+str1);
BufferedReader reader = null;
BufferedWriter writer = null;
if(f1.exists()) {
try {
reader = new BufferedReader(new FileReader(f1));
writer = new BufferedWriter(new FileWriter(f2));
String t;
while((t=reader.readLine())!=null){
writer.write(t);
writer.newLine();
writer.flush();
}
}catch(FileNotFoundException e){
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally{
try{
writer.close();
reader.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
if(f1.delete()) {
System.out.println("剪下成功");
}else {
System.out.println("剪下失敗");
}
}

}

方法二：

package Onenine;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
//功能 實現剪下
public class Cut {

public static void cutFile(File file1, File file2){
FileOutputStream outputStream = null;
InputStream inputStream = null;
byte[] bytes = new byte[1024];
int temp = 0;
try {
inputStream = new FileInputStream(file1);
outputStream = new FileOutputStream(file2);
while((temp = inputStream.read(bytes)) != -1){
outputStream.write(bytes, 0, temp);
outputStream.flush();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}finally{
/*if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fileOutputStream != null) {
try {
fileOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}*/
try{
inputStream.close();
outputStream.close();
}catch(IOException e){
e.printStackTrace();
}
}

}

}

//實現測試類

package Onenine;


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;


public class Test {


public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner in = new Scanner(System.in);
String s =in.next();

String str1 =in.next();
String str2 = in.next();
System.out.println(s+"\\"+str1);
File file1 = new File(s+"\\"+str1);
File file2 = new File(str2+"\\"+str1);
file1.deleteOnExit();
try {
file2.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
Cut f1 = new Cut();
f1.cutFile(file1, file2);

}
}