JAVA-将CSV导入ArrayList

Z时代
2024-01-10
分类：问答

我正在尝试使用导入CSV文件：Arraylist``StringTokenizer

public class Test
{
  public static void main(String [] args)
  {
    List<ImportedXls> datalist = new ArrayList<ImportedXls>();
    try
    {
      FileReader fr = new FileReader("c:\\temp.csv");
      BufferedReader br = new BufferedReader(fr);
      String stringRead = br.readLine();
      while( stringRead != null )
      {
        StringTokenizer st = new StringTokenizer(stringRead, ",");
        String docNumber = st.nextToken( );
        String note = st.nextToken( );  /** PROBLEM */
        String index = st.nextToken( ); /** PROBLEM */
        ImportedXls temp = new ImportedXls(docNumber, note, index);
        datalist.add(temp);
        // read the next line
        stringRead = br.readLine();
      }
      br.close( );
    }
    catch(IOException ioe){...}
    for (ImportedXls item : datalist) {
      System.out.println(item.getDocNumber());
    }
  }
}

我不明白是怎么nextToken工作的，因为如果我继续初始化三个变量（docNumber，note和index）的nextToken()，它失败的：

Exception in thread "main" java.util.NoSuchElementException
    at java.util.StringTokenizer.nextToken(Unknown Source)
    at _test.Test.main(Test.java:32)

如果我仅保留docNumber，则它可以工作。你可以帮帮我吗？