/**
* 检查发布目录下是否存在文件夹
* @param folder 需要检查的文件
* @param name 需要检查的文件夹名称
* @Return 返回检查的文件夹
*/
private File A4IsExiste(File folder , String name) {
if (folder.isDirectory()) {
if ((name.equals(folder.getName()))) {
return folder;
} else {
File[] folderList = folder.listFiles(new FileFilter() {
public boolean accept(File pathname) {
return pathname.isDirectory();
}
});
for (File folderItem : folderList) {
return A4IsExiste(folderItem, name);
}
}
}
return null;
}

如果我直接选择需要的文件夹，就没问题，但是如果选择需要文件夹的父目录或父目录的父目录……就找不到。请大家帮忙看看。谢谢

我改了一下，现在可以了，就是可以查找到比如 D:/ 下任何你想要的文件名。

import java.io.*;

public class FileSelect {

File temp;
boolean isFinish =false;
public void A4IsExiste(File folder , String name) {

//System.out.println("folder path is " + folder.getAbsolutePath());
if (folder.isDirectory()) {
// System.out.println("the folder "+name+" name is "+folder.getName());

if (name.equals(folder.getName()))
{
//System.out.println("return");

this.temp = folder;
}
else
{
File[] folderList = folder.listFiles(new FileFilter() {
public boolean accept(File pathname) {
return pathname.isDirectory();
}
});

for(File folderItem : folderList) {
//System.out.println(folderList.length);
A4IsExiste(folderItem, name);
}
}
}
}
public static void main(String args[])
{
//new FileSelect().A4IsExiste("D:\\", null);
FileSelect tempFile =new FileSelect();
tempFile.A4IsExiste(new File("E:\\Eclipse project"),"Test2"); //《--这里可以写上查找文件的名字
System.out.println(tempFile.temp.getName() + " At " +tempFile.temp.getAbsolutePath());
}

    private File A4IsExiste(File root,String name){
        if(!root.isDirectory()) throw new IllegalArgumentException(\"root must be a directory!\");
        if(root.getName().equals(name)) return root;
        File[] dirs =root.listFiles(new FileFilter(){
            public boolean accept(File file){
                return file.isDirectory();
            }
        });
        File result =null;
        for(File dir: dirs){
            result =A4IsExiste(dir,name);
            if(result !=null) break;
        }
        return result;
    }

你自己想想,你那个for循环有作用吗?
不理解偶也没办法.