java.util.NoSuchElementException - 在 XSSFSheet 上读取

Question

我正在努力解决读取 xlsx 文件的错误。我正在使用 poi 3.9-2012。我的构造函数和其他方法代码是：

public students(String studentsDb){
      this.location = studentsDb;
        this.location = studentsDb;
        studentInfoDB = new HashSet<Student>();
        DBSetUp(location);
    }
private void DBSetUp(String location) {
        try {
                this.location = location;
                FileInputStream file = new FileInputStream(new File(location));
                workbook = new XSSFWorkbook(file);
                setUpStudent();
                setUpTeam();
        } catch (FileNotFoundException e) {
            System.out.println("Failed To Find The File!");
        } catch (IOException e) {
            System.out.println("Failed To Create Workbook!");
        }           
}
private void setUpTeam() {
        XSSFSheet sheet = workbook.getSheetAt(1);

        Iterator<Row> rowIterator = sheet.iterator();
        rowIterator.next();
        while (rowIterator.hasNext()) {

            Row row = rowIterator.next();
            Iterator<Cell> cellIterator = row.cellIterator();
            Cell cell = cellIterator.next();
            String tempTeam = cell.getStringCellValue();

            while (cellIterator.hasNext()) {

                cell = cellIterator.next();
                String tempName = cell.getStringCellValue();

                for (Student s : studentInfoDB) {
                    if (s.getName().equals(tempName)) {
                        s.setTeam(tempTeam);
                    }
                }
            }
        }

}

当我调用构造函数 Students(location) 时。 eclipse java 总是生成以下错误消息

java.util.NoSuchElementException at java.util.TreeMap$PrivateEntryIterator.nextEntry(unknon source) at java.util.TreeMap$ValueIterator.next(unknown source) at Students.setUpTeam(Students.java:77) at Students.DBSetUp(Students.java:56) at Students.(Students.java:39)

Answer 1

只要枚举中没有下一个元素，就会抛出

NoSuchElementException，因此您调用的第一个 rowIterator.next() 就是问题所在。我认为这是因为你的 xsl 文档中确实只有一个 sheet，所以你应该得到第一个 sheet，它是 getSheetAt(0) 而不是一个。

java.util.NoSuchElementException - 在 XSSFSheet 上读取

java.util.NoSuchElementException - on XSSFSheet read

java

apache-poi

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