第20天java基础学习。一个关于IO的有意思的简单小程序 - 黑马程序员技术交流社区

/*
将文件夹中的文件名称存入txt文件中
*/
import java.util.*;
import java.io.*;
class MovFileTest
{
public static void main(String[] args)
{
File dir = new File("D:\\Program Files (x86)\\教学视屏");
List<File> list = new ArrayList<File>();
toArrayList(dir,list);
File file = new File(dir,"教学视频汇总.txt");
toText(list,file);
}
public static void toArrayList(File dir,List<File> list)
{
File[] file = dir.listFiles();
for(File f:file)
{
if(f.isDirectory())
toArrayList(f,list);
else
{
String name = f.getName();
if(name.endsWith(".avi")||name.endsWith(".mp4")||name.endsWith(".rmvb")||name.endsWith(".mkv")||name.endsWith(".flv")||name.endsWith(".wmv"))
list.add(f);
}
}
}
public static void toText(List<File> list,File dir)
{
BufferedWriter bw =null;
int count=list.size();
try
{
bw = new BufferedWriter(new FileWriter(dir));
bw.write("共计"+count+"部影片");
bw.newLine();
for(File f :list)
{
String path=f.getAbsolutePath();
//String name=f.getName();
bw.write(path);
bw.newLine();
bw.flush();
}
}
catch (IOException io)
{
throw new RuntimeException("出错");
}
finally
{
try
{
if(bw!=null)
bw.close();
}
catch (IOException io)
{
throw new RuntimeException("关闭资源出错！");
}
}
}
}

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