Javaはフォルダー内のファイルの読み取りと削除を実装します

java实现读取、删除文件夹下的文件

package test.com;
  
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
  
public class ReadFile {
  public ReadFile() {
  }
  /**
   * 读取某个文件夹下的所有文件
   */
  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(file.getName());
  
          } else if (file.isDirectory()) {
              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(readfile.getName());
  
                  } else if (readfile.isDirectory()) {
                      readfile(filepath + "\\" + filelist[i]);
                  }
              }
  
          }
  
      } catch (FileNotFoundException e) {
          System.out.println("readfile()  Exception:" + e.getMessage());
      }
      return true;
  }
  
  /**
   * 删除某个文件夹下的所有文件夹和文件
   */
    
    
  /*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;
  }*/
    
  public static void main(String[] args) {
      try {
          readfile("C:\\Users\\SW\\Desktop\\SKJ_H25補正\\004_RCAG\\003_SKJ");
          // deletefile("D:/file");
      } catch (FileNotFoundException ex) {
      } catch (IOException ex) {
      }
      System.out.println("ok");
  }
  
}

方法二：

package otherstudy;
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
 
/**
 * @ClassName: TestReadFile
 * @CreateTime: Aug 1, 2014 11:42:44 AM
 * @Author: mayi
 * @Description: 读取和删除文件夹下的所有文件
 *
 */
public class TestReadFile {
    /**
     * 获取工程的WebRoot的绝对路径
     * @return
     */
    String getProjectPath(){
        //得到形如"/d:/${workspace}/${projectName}/WebRoot/WEB-INF/classes/"的 路径
    String path=this.getClass().getResource("/").getPath();
    //从路径字符串中取出工程路径
    path=path.substring(1, path.indexOf("WEB-INF/classes"));
    System.out.println("工程路径："+path);
    return path;
    }
    /**
     * @param args
     */
    public static void main(String[] args) {
        TestReadFile trf=new TestReadFile();
        String xmlPath = trf.getProjectPath()+ "testDocs";
        try {
            readAllFile(xmlPath);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    /**
     * 读取指定路径文件夹下的所有文件
     * @param filepath
     * @return
     * @throws FileNotFoundException
     * @throws IOException
     */
    public static boolean readAllFile(String filepath)
            throws FileNotFoundException, IOException {
        try {
            File file = new File(filepath);
            if (!file.isDirectory()) {
                System.out.println("\n文件信息：");
                System.out.println("\t相对路径=" + file.getPath());
                System.out.println("\t绝对路径=" + file.getAbsolutePath());
                System.out.println("\t文件全名=" + file.getName());
 
            } else if (file.isDirectory()) {
                System.out.println("\n文件夹内文件列表信息：");
                File[] fileList = file.listFiles();
                for (int i = 0; i < fileList.length; i++) {
                    File readfile = fileList[i];
                    if (!readfile.isDirectory()) {
                        System.out.println("\n\t相对路径=" + readfile.getPath());
                        System.out.println("\t绝对路径=" + readfile.getAbsolutePath());
                        System.out.println("\t文件全名=" + readfile.getName());
                    } else if (readfile.isDirectory()) {
                        readAllFile(fileList[i].getPath());
                    }
                }
            }
        } catch (FileNotFoundException e) {
            System.out.println("readfile()  Exception:" + e.getMessage());
        }
        return true;
    }
 
    /**
     * 删除某个文件夹下的所有文件夹和文件
     * @param delpath
     * @return
     * @throws FileNotFoundException
     * @throws IOException
     */
    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");
                File[] fileList = file.listFiles();
                for (int i = 0; i < fileList.length; i++) {
                    File delfile = fileList[i];
                    if (!delfile.isDirectory()) {
                        System.out.println("相对路径=" + delfile.getPath());
                        System.out.println("绝对路径=" + delfile.getAbsolutePath());
                        System.out.println("文件全名=" + delfile.getName());
                        delfile.delete();
                        System.out.println("删除文件成功");
                    } else if (delfile.isDirectory()) {
                        deleteFile(fileList[i].getPath());
                    }
                }
                file.delete();
            }
        } catch (FileNotFoundException e) {
            System.out.println("deletefile()  Exception:" + e.getMessage());
        }
        return true;
    }
}

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