首頁猿問誰可以幫忙寫一段java判斷文件或...

誰可以幫忙寫一段java判斷文件或者文件夾是否存在的代碼

Java

慕斯卡0459231 2017-05-19 10:33:01

謝謝~~~~~~

查看完整描述

2 回答

已采納

田心楓

TA貢獻1064條經(jīng)驗獲得超383個贊

package?com.may.ninety;

import?java.io.File;
import?java.io.IOException;

public?class?WeekDemo1?{

????public?static?void?main(String[]?args)?{

????????File?dir?=?new?File("/tmp/test/");
????????WeekDemo1.judeDirExists(dir);

????????File?file?=?new?File("/tmp/test/b.txt");
????????WeekDemo1.judeFileExists(file);


????}

????//?判斷文件是否存在
????public?static?void?judeFileExists(File?file)?{

????????if?(file.exists())?{
????????????System.out.println("file?exists");
????????}?else?{
????????????System.out.println("file?not?exists,?create?it?...");
????????????try?{
????????????????file.createNewFile();
????????????}?catch?(IOException?e)?{
????????????????e.printStackTrace();
????????????}
????????}

????}

????//?判斷文件夾是否存在
????public?static?void?judeDirExists(File?file)?{

????????if?(file.exists())?{
????????????if?(file.isDirectory())?{
????????????????System.out.println("dir?exists");
????????????}?else?{
????????????????System.out.println("the?same?name?file?exists,?can?not?create?dir");
????????????}
????????}?else?{
????????????System.out.println("dir?not?exists,?create?it?...");
????????????file.mkdir();
????????}

????}

}

5 反對回復(fù) 2017-05-19

yanrun

TA貢獻317條經(jīng)驗獲得超240個贊

public?static?void?main(String[]?args)?{
		System.out.println(isFileExists("D:/repo"));
	}
	
	private?static?boolean?isFileExists(String?path)?{
		File?file?=?new?File(path);
		return?file.exists();
	}

反對回復(fù) 2017-05-19