如何实现.txt结尾文件的搜索？
建立一个线程，该线程用来搜索c盘WINDOWS文件夹下所有以“.txt”结尾的文件
（要求：用java实现），最好有注释

[解决办法]

Java code

import java.io.File;import java.io.FilenameFilter;import java.util.ArrayList;import java.util.List;/** * 获取目录下txt文件名 * @author shangzc * */public class UpLoadFile implements FilenameFilter{         private String prefix = "", suffix = "";     public UpLoadFile(String filterstr) {      filterstr = filterstr.toLowerCase();      int i = filterstr.indexOf('*');      int j = filterstr.indexOf('.');      if (i > 0) {       prefix = filterstr.substring(0, i);      }      if (j > 0) {       suffix = filterstr.substring(j + 1);      }     }     public boolean accept(File dir, String name) {      // TODO Auto-generated method stub      boolean yes = true;      try {       name = name.toLowerCase();       yes = (name.startsWith(prefix)) & (name.endsWith(suffix));      } catch (NullPointerException e) {      }      return yes;     }     /**      * 得到目下文件的所有的txt      * @param file      * @return      */     public static List getPhotoName(File file) {      List fileList = new ArrayList();      FilenameFilter filter = new UpLoadFile("*.txt");      File curdir = new File(file.getAbsolutePath(), "");      String[] str = curdir.list(filter);      return fileList;     }     /**程序的入口*/     public static void main(String[] args)  {         }    }
[解决办法]
public class FileFilter implements java.io.FileFilter {
private String regex = "";//such as ".+\\.txt$|"

public FileFilter() {
}
public FileFilter(String[] regex) {
for(String reg : regex) {
this.regex = ".+\\." + reg + "$|" + this.regex;
}
}
@Override
public boolean accept(File pathname) {
// TODO Auto-generated method stub
 String tmp=pathname.getName().toLowerCase();
if(this.regex.length()>0)
 return (tmp.matches(regex));
 return true;
}

}

String[] fileExt = {"txt","scc","avi","mp3"};//列取所有txt,scc,avi,mp3的文件
FileFilter ft = new FileFilter(fileExt);//arg2 is date scope
File file = new File("c:\\");
file.listFiles(filter);



[解决办法]
给个比较简单的：



import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class Test {
List<String> list=new ArrayList<String>();
public List<String> searchText(String folderPath) {
//文件夹路径
File path = new File(folderPath);

String orgsuffix = ".txt";

if (path.exists()) {
//获取目录下的所有文件夹及目录
File[] filePath = path.listFiles();
for (File file : filePath) {
//若是文件
if (file.isFile()) {
String fileName=file.getName();
String suffix = fileName.substring(fileName.length() - 4);
if (orgsuffix.equals(suffix)) {
list.add(fileName);
}
}
//若是文件夹
else if(file.isDirectory()){
//递归
searchText(file.getPath());
}
}
} else {
System.out.println("搜索目录不正确");
}
return list;
}
}