Apache Commons IO - SizeFileComparator

SizeFileComparator 比較兩個檔案/目錄的大小。它可以用來根據大小或目錄基於它們的子項數量來對檔案列表或陣列進行排序。

類宣告

以下是 org.apache.commons.io.comparator.SizeFileComparator 類宣告 −

public class SizeFileComparator

public class SizeFileComparator
   extends Object implements Serializable

SizeFileComparator 類的示例

這是我們需要解析的輸入檔案 −

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IOTester.java

import java.io.File;
import java.io.FileFilter;
import java.io.IOException;
import org.apache.commons.io.comparator.SizeFileComparator;
import org.apache.commons.io.filefilter.FileFileFilter;
public class IOTester {
   public static void main(String[] args) {
      try {
         usingSizeFileComparator();
      } catch(IOException e) {
         System.out.println(e.getMessage());
      }
   } 
   public static void usingSizeFileComparator() throws IOException {
      //get the current directory
      File currentDirectory = new File(".");
      SizeFileComparator comparator = new SizeFileComparator();
      File[] sortedFiles = comparator.sort(currentDirectory.listFiles((FileFilter)FileFileFilter.FILE));
      System.out.println("Sorted By Size: ");
      for(File file:sortedFiles) {
         System.out.println(file.getName() + ", size(kb) :" + file.length());
      }
   }
}

輸出

它將列印以下結果。

Sorted By Size:
input.txt, size:124
.project, size:382
.classpath, size:441