java读取文件夹下的所有文件夹和文件

Java文件读取与删除

最新推荐文章于 2024-02-19 10:51:41 发布

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最新推荐文章于 2024-02-19 10:51:41 发布

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文章标签： java

本文介绍了一个简单的Java程序，该程序包含两个主要功能：读取指定路径下的文件信息及递归删除指定路径下的所有文件和子文件夹。通过实例演示了如何使用Java标准库中的File类来实现文件操作。

package com.borland.samples.welcome;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.File;

public class ReadFile {
public ReadFile() {}

/**
   * 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;
}

/**
   * 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 readfile(String filepath) throws FileNotFoundException,
      IOException {
    try {

      File file = new File(filepath);
      if (!file.isDirectory()) {
        System.out.println("文件");
        System.out.println("path=" + file.getPath());
        System.out.println("absolutepath=" + file.getAbsolutePath());
        System.out.println("name=" + file.getName());

      }
      else if (file.isDirectory()) {
        System.out.println("文件夹");
        String[] filelist = file.list();
        for (int i = 0; i < filelist.length; i++) {
          File readfile = new File(filepath + "\\" + filelist[i]);
          if (!readfile.isDirectory()) {
            System.out.println("path=" + readfile.getPath());
            System.out.println("absolutepath=" + readfile.getAbsolutePath());
            System.out.println("name=" + readfile.getName());

          }
          else if (readfile.isDirectory()) {
            readfile(filepath + "\\" + filelist[i]);
          }
        }

      }

    }
    catch (FileNotFoundException e) {
      System.out.println("readfile()   Exception:" + e.getMessage());
    }
    return true;
}

public static void main(String[] args) {
    try {
      readfile("D:/file");
      //deletefile("D:/file");
    }
    catch (FileNotFoundException ex) {
    }
    catch (IOException ex) {
    }
    System.out.println("ok");
}

}