Apache Commons IO - OrFileFilter

OrFileFilter 提供跨檔案過濾器列表的條件 OR 邏輯。如果列表中的任一過濾器返回 true，它將返回 true。否則，它將返回 false。

類宣告

下面是 org.apache.commons.io.filefilter.OrFileFilter 類的宣告 -

public class OrFileFilter
   extends AbstractFileFilter implements ConditionalFileFilter, Serializable

OrFileFilter 類的示例

以下是我們需要解析的輸入檔案 -

Welcome to TutorialsPoint. Simply Easy Learning.

讓我們列印當前目錄中的所有檔案和目錄，然後過濾一個以 . 開頭或以 t 結尾的檔案。

IOTester.java

import java.io.File;
import java.io.IOException;
import org.apache.commons.io.filefilter.OrFileFilter;
import org.apache.commons.io.filefilter.PrefixFileFilter;
import org.apache.commons.io.filefilter.WildcardFileFilter;
public class IOTester {
   public static void main(String[] args) {
      try {
         usingOrFileFilter();
      } catch(IOException e) {
         System.out.println(e.getMessage());
      }
   }
   public static void usingOrFileFilter() throws IOException {
      //get the current directory
      File currentDirectory = new File(".");
      //get names of all files and directory in current directory
      String[] files = currentDirectory.list();
      System.out.println("All files and Folders.\n");
      for( int i = 0; i < files.length; i++ ) {
         System.out.println(files[i]);
      }
      System.out.println("\nFile starting with . or ends with t\n");
      String[] filesNames = currentDirectory.list( new OrFileFilter(new PrefixFileFilter("."), new WildcardFileFilter("*t")));
      for( int i = 0; i < filesNames.length; i++ ) {
         System.out.println(filesNames[i]);
      }
   }
}

輸出

它會列印以下結果。

All files and Folders.

.classpath
.project
.settings
bin
input.txt
src

File starting with . or ends with t

.classpath
.project
.settings
input.txt