【转】 java 读取某个文件夹下的所有文件夹和文件, 返回所有文件名

java 读取某个文件夹下的所有文件夹和文件, 返回所有文件名

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class FileUtil {
 private static final Log logger = LogFactory.getLog(FileUtil.class);
 /** 
  * 删除某个文件夹下的所有文件夹和文件 
  * @param delpath String 
  * @throws FileNotFoundException 
  * @throws IOException 
  * @return boolean 
  */ 
 public static boolean deletefile(String delpath) throws FileNotFoundException, 
 IOException { 
  try {
   File file = new File(delpath); 
   if (!file.isDirectory()) { 
    System.out.println("1"); 
    file.delete(); 
   } 
   else if (file.isDirectory()) { 
    System.out.println("2"); 
    String[] filelist = file.list(); 
    for (int i = 0; i < filelist.length; i++) { 
     File delfile = new File(delpath + "" + filelist[i]); 
     if (!delfile.isDirectory()) { 
      System.out.println("path=" + delfile.getPath()); 
      System.out.println("absolutepath=" + delfile.getAbsolutePath()); 
      System.out.println("name=" + delfile.getName()); 
      delfile.delete(); 
      System.out.println("删除文件成功"); 
     } 
     else if (delfile.isDirectory()) { 
      deletefile(delpath + "" + filelist[i]); 
     } 
    } 
    file.delete();
   }
  } 
  catch (FileNotFoundException e) { 
   System.out.println("deletefile() Exception:" + e.getMessage()); 
  } 
  return true; 
 }
 /**
  * 
  * 读取某个文件夹下的所有文件夹和文件, 返回所有文件名
  * @param filepath String 
  * @throws FileNotFoundException 
  * @throws IOException 
  * @return Map<Integer, String> pathMap
  * 
  */ 
 public static Map<Integer, String> readfile(String filepath, Map<Integer, String> pathMap) throws Exception {
  if (pathMap == null) {
   pathMap = new HashMap<Integer, String>();
  }
  File file = new File(filepath); 
  // 文件
  if (!file.isDirectory()) { 
   pathMap.put(pathMap.size(), file.getPath());
  } else if (file.isDirectory()) { // 如果是目录， 遍历所有子目录取出所有文件名 
   String[] filelist = file.list(); 
   for (int i = 0; i < filelist.length; i++) { 
    File readfile = new File(filepath + "/" + filelist[i]); 
    if (!readfile.isDirectory()) {
     pathMap.put(pathMap.size(), readfile.getPath());
    } else if (readfile.isDirectory()) { // 子目录的目录
     readfile(filepath + "/" + filelist[i], pathMap); 
    } 
   } 
  } 
  return pathMap; 
 }
 public static void main(String[] args) { 
  try { 
   Map<Integer, String> map = readfile("E:/temp/0813", null);
   for(int i=0 ; i < map.size(); i++) {
    System.out.println(map.get(i));
   }
//   deletefile("D:/file"); 
  }
  catch (Exception ex) { 
  } 
  System.out.println("ok"); 
 }
}

 

 

很简单的递归，怕忘记了，留着。