Apache Commons IO - LineIterator

LineIterator 提供了一種靈活的方式來處理基於行的檔案。

類宣告

以下是 org.apache.commons.io.LineIterator 類的宣告 -

public class LineIterator
   extends Object implements Iterator<String>, Closeable

LineIterator 類的示例

以下是我們需要進行解析的輸入檔案 -

Welcome to TutorialsPoint. Simply Easy Learning.
Learn web technologies,
prepare exams,
code online,
all at one place.

IOTester.java

import java.io.File;
import java.io.IOException;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.LineIterator;
public class IOTester {
   public static void main(String[] args) {
      try {
         usingLineIterator();
      } catch(IOException e) {
         System.out.println(e.getMessage());
      }
   }
   public static void usingLineIterator() throws IOException {
      //get the file object
      File file = FileUtils.getFile("input.txt");
      try(LineIterator lineIterator = FileUtils.lineIterator(file)) {
         System.out.println("Contents of input.txt");
         while(lineIterator.hasNext()) {
            System.out.println(lineIterator.next());
         }
      }
   }
}

輸出

它將列印以下結果 -

Contents of input.txt
Welcome to TutorialsPoint. Simply Easy Learning.
Learn web technologies,
prepare exams,
code online,
all at one place.