如何在 while 循环中使用 split 方法进一步拆分从 txt 文件中读取的信息？

Question

例如，文本文件中的一行是：Richard,RL#17

我在一个while循环中拆分数据，我可以成功得到两条独立的信息。

现在我该怎么做才能进一步拆分字段 [0] - 字符串 - 以便我可以将“Richard”和“RL”分开。我必须再次拆分，这次是“，”。

  File inputFile = new File ("Personnel.txt");
  FileReader in = new FileReader (inputFile);
  BufferedReader inFromFile = new BufferedReader (in);

  String line = inFromFile.readLine ();
  int cnt = 0;

  while (line != null)
  {
     String [] field = line.split ("#");
     int age = Integer.parseInt (field [1]);
     workers [cnt] = new Personnel (field [0], age);
     cnt++;
     line = inFromFile.readLine();
  }
  inFromFile.close();

  for (int i = 0; i < cnt; i ++)
  {
     System.out.println ();
     System.out.println (workers [i]);
  }

所以我可以使用配对对象类成功读取数据并显示它。现在，我想知道我会进一步将具有“Richard,RL#17”的名字分成两个独立的过去。可以再用split方法吗，如果可以，怎么用？

我已尝试构建另一个 while 循环，但我不确定如何引用字段 [0] - 在本例中为文本文件中的名称 - 并从那里拆分它。我尝试做另一个程序，但没有成功。另一个程序如下：

     File inputFile = new File ("placeHolder.txt");
     FileReader inFile = new FileReader (inputFile);

     placeHolder[] lotsOfText = new placeHolder[10];

     int cnt = 0;

     for(int i = 0; i < lotsOfText.length; i++)
     {
        String line = inFile.readLine();
        while(line != null)
        {
         String[] field = line.split(",");
         field = line.split("#");
         lotsOfText[cnt] = new placeHolder(field[0],field[1],field[2],field[3]);


         cnt++;
        }   
     }  

     System.out.println(field[0] + " " + field[1] + " " + field[2] + " " + field[3]);

   }

Answer 1

我认为这就是您想要实现的目标。

添加到 Manjunath Anand 的回复中： 如果你想从文件中的一行中获取 3 个字符串，“Richard”，“RL”，“17”，然后存储到一个对象中并打印它，你可以这样做：

编辑：添加了一些异常处理并测试了代码：

public class Testing {

class Personnel {
    String name;
    String initials;
    int age;
    Personnel(String name, String initials, int age) {
        this.name = name;
        this.initials = initials;
        this.age = age;
    }
}

void readData() {
    File inputFile = new File ("Personnel.txt");
    FileReader in = null;
    BufferedReader inFromFile = null;
    ArrayList<Personnel> data = null;
    try {
        in = new FileReader (inputFile);
        inFromFile = new BufferedReader (in);

        // list that will hold all personnel objects
        data = new ArrayList<Personnel>();
        String line = inFromFile.readLine ();

        while (line != null) {
            String [] field = line.split("([,#])");
            String name = field[0]; // field[0] = "Richard"
            String initials = field[1]; // field[1] = "RL"
            int age = Integer.valueOf(field[2]);// field[2] = "17";
            data.add(new Personnel (name, initials, age));
            line = inFromFile.readLine();
        }
        inFromFile.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } 

    for(Personnel p : data) {
        System.out.println("Name:\t\t" + p.name);
        System.out.println("Initials:\t" + p.initials);
        System.out.println("Age:\t\t" + p.age);
        System.out.println();
    }
}

public static void main(String[] args) {
    Testing test = new Testing();
    test.readData();
}

}

Answer 2

试试下面的代码：-

String str1 = "Richard,RL#17";
String[] arr = str1.split("([,#])");

它会给你一个数组中的所有镜头

编辑：

    File inputFile = new File ("Personnel.txt");
    FileReader in = new FileReader (inputFile);
    BufferedReader inFromFile = new BufferedReader (in);
    // Create a scanner object which has convenient methods to read from file reader.
    Scanner s = new Scanner(inFromFile); 
    String [] field;
    String personLine;
    // Check if there is any data in the file
    while(s.hasNextLine()) {
        // read the entire line form the scanner of the file
        personLine = s.nextLine().trim();
        field = personLine.split("([,#])"); // you can put any number of delimiters within the square braces which seperate the data for person stored in the file
        // rest of your code logic
    } // keep reading till you finish all data