如何从 JAVA 中的 excel 获取列值？

Question

如何在 apache poi 4 中将每行和第 14 列的值读取到字符串变量中。

         while (rows.hasNext()) {
                Row currentRow = rows.next();
                System.out.println(currentRow);
                Iterator<Cell> cellsInRow = currentRow.iterator();
                while(cellsInRow.hasNext()) {
                    Cell currentCell = cellsInRow.next();
                    int cellIndex = currentCell.getColumnIndex();
                    int columnidx = 14;
                    String values = currentCell.getStringValue() //how can i get the  value for every row for column 14  
                }
            }

Answer 1

如果您查看文档，即 Row, you will find the very handy getCell(int cellnum) 方法的 javadoc：

Get the cell representing a given column (logical cell) 0-based. If you ask for a cell that is not defined....you get a null.

这意味着您不应迭代所有单元格：

while (rows.hasNext()) {
    Row currentRow = rows.next();
    Cell cell14 = currentRow.getCell(13); // 14th cell
    String value = (cell14 == null ? null : cell14.getStringCellValue());
    // use value here
}

无关，但您不应使用迭代器 while 循环。如果使用 for-each 循环，代码将更简单易读，因此不用：

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

    Iterator<Cell> cellsInRow = currentRow.iterator();
    while (cellsInRow.hasNext()) {
        Cell currentCell = cellsInRow.next();

    }
}

你应该使用：

for (Row currentRow : sheet) {

    for (Cell currentCell : currentRow) {

    }
}

看看代码改进了多少？

如何从 JAVA 中的 excel 获取列值？

How to get column value from excel in JAVA?

java

apache-poi