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package 遍历文件夹;
import java.io.*;
import java.util.*;
class Tool
{
/*
*递归遍历文件夹
*@path 路径
*@type 按文件类型过滤
*/
static List<File> list =new LinkedList<File>();
public static List<File> getFiles1(String path, String type)
{
File file=new File(path);
File[] fs=file.listFiles();
for (File f:fs)
{
if (f.isFile())
{
if ((f.getName().toLowerCase()).endsWith(type))
list.add(f);
}
else
{
getFiles1(f.getAbsolutePath(), type);
}
}
return list;
}
/*
*非递归遍历文件夹
* @path 路径
* @type 按文件类型过滤
*/
public static List<File> getFiles2(String path, String type)
{
// TODO: Implement this method
List<File> files=new LinkedList<File>();
LinkedList<File> stack=new LinkedList<File>();
File file=new File(path);
for (File f:file.listFiles())
{
if (f.isFile())
{
if ((f.getName().toLowerCase()).endsWith(type))
files.add(f);
}
else
{
stack.push(f);
}
}
//不为空则继续循环
while (stack.size() != 0)
{
file = stack.pop();
for (File f:file.listFiles())
{
if (f.isFile())
{
if ((f.getName().toLowerCase()).endsWith(type))
files.add(f);
}
else
stack.push(f);
}
}
return files;
}
}
public class Main
{
public static void main(String[] args)
{
final String path="D:\\Users\\Administrator";
System.out.println(">>>遍历:" + path);
long time=System.currentTimeMillis();
List<File> fs1=Tool.getFiles1(path, "");
System.out.println("文件数量:" + fs1.size());
System.out.println("递归耗时:" + (double)(System.currentTimeMillis() - time)/1000+"s");
System.out.println();
time = System.currentTimeMillis();
List<File> fs2=Tool.getFiles2(path, "");
System.out.println("文件数量:" + fs2.size());
System.out.println("非递归耗时:" + (double)(System.currentTimeMillis() - time)/1000+"s");
}
}