Question

java文件操作删除某一目录下指定类型的文件，代码如何实现

比如我想删除某个目录下所有的.txt文件，用java如何实现？在此谢过各位大神了！

Answer 1

找到目录下的所有文件，然后for循环遍历，用endwith("txt")判断，找到一个删除一个就行了，代码简单略

Answer 2

package com.test1;
import java.io.File;
public class Test {
public static void main(String args[]) {
try {
deletefile("C:\\aa");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void deletefile(String delpath) throws Exception {

File file = new File(delpath);
String[] filelist = file.list();
for (int i = 0; i < filelist.length; i++) {
File delfile = new File(delpath + "\\" + filelist[i]);
if (!delfile.isDirectory()) {
if(delfile.getName().endsWith("txt")){
delfile.delete();
System.out.println(delfile.getAbsolutePath() + "删除文件成功");
}
} else if (delfile.isDirectory()) {
deletefile(delpath + "\\" + filelist[i]);
}
}
}
}

Answer 3

public static void main(String[] args) {
	File file = new File("D://");
	File[] files = file.listFiles();
	for (int i = 0; i < files.length; i++) {
		String fileName = files[i].getName();
		if (fileName.lastIndexOf(".") != -1 && fileName.lastIndexOf(".") != 0) {
			if(fileName.endsWith("txt")) {
				System.out.println(fileName);
				files[i].deleteOnExit();
			}
		}
	}
}

Answer 4

package reptile;

import java.io.File;
import java.io.FilenameFilter;

import javax.swing.filechooser.FileFilter;

public class TestDelete
{

public static void main(String[] args){
File f = new File("D:/Books/oracle 11g从入门到精通");
//FilenameFilter filter = new FileFilter();
File[] files = f.listFiles();
for(int i = 0 ; i < files.length; i++){

if(files[i].getName().endsWith(".txt")){
files[i].delete();
}
}
}
}