我在阅读xlsx文件时遇到了错误。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);
}
}
}
}
}
当我打电话给构造函数学生(位置)时。 eclipse java总是会生成以下错误消息
java.util.NoSuchElementException at java.util.TreeMap $ PrivateEntryIterator.nextEntry(unknon source)at java.util.TreeMap $ ValueIterator.next(未知来源)at Students.setUpTeam(Students.java:77)at Students.DBSetUp(Students.java:56)at 生。(Students.java:39)
答案 0 :(得分:2)
如果枚举中没有下一个元素,则抛出NoSuchElementException,因此您调用的第一个rowIterator.next()是问题所在。我认为它是因为你的xsl文件中只有一张纸,所以你应该得到第一张是getSheetAt(0)而不是一张。