列表分层符问题 - 黑马程序员技术交流社区

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class FileList {
public static void main(String[] args) throws IOException{
File dir = new File("E:\\黑马视频");
List<File> list = new ArrayList<File>();
fileToList(dir,list,0);
File file = new File(dir,"视频列表.txt");
writeToFile(list,file.toString());
}
public static void fileToList(File dir, List<File> list,int level)
{
level++;
File[] files = dir.listFiles();
for(File file:files)
{
if(file.isDirectory())
fileToList(file,list,level);
else
{
if(file.getName().endsWith(".avi"))
list.add(file);
// list.add(getLevel(level)+file);//加不进去啊
}
}
}
public static void writeToFile(List<File> list,String javaListFile)throws IOException
{
BufferedWriter bufw = null;
try {
bufw = new BufferedWriter(new FileWriter(javaListFile));
for(File f :list)
{
String path = f.getAbsolutePath();
bufw.write(path);
bufw.newLine();
bufw.flush();
}
} catch (Exception e) {
throw e;
}
finally
{
try {
if(bufw!=null)
bufw.close();
} catch (Exception e) {
throw e;
}
}
}
public static String getLevel(int level)
{
StringBuilder sb = new StringBuilder();
sb.append("|--");
for(int x=0;x<level;x++)
{
sb.insert(0," ");
}
return sb.toString();
}
}

复制代码