我有一个Excel工作表,并且使用 Apache POI 库读取该工作表,但是我希望用户选择哪一行和(多个选定的单元格)来显示其数据。 例如:
Name | ID | Password | date
john | 1001 | 1234 | 2-9-1997
James | 1002 |4567 | 24-6-1980
Liza | 1003 | 7890 | 18 -11-1990
我想读取第一行,但只读取名称,ID和数据单元格,而不是全部行。我该怎么做?
这是我的尝试:
package javaapplication;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class JavaApplication {
public static void main(String[] args) {
try {
// Specify the path of file
File path=new File("/Users/monasaad1/Desktop/emp.xlsx");
// load file
FileInputStream file=new FileInputStream(path);
// load workbook
XSSFWorkbook workbook=new XSSFWorkbook(file);
// Load sheet- Here we are loading first sheetonly
XSSFSheet sheet1= workbook.getSheetAt(0);
int rowCounter = sheet1.getLastRowNum();
// user input row & cell
Scanner input = new Scanner(System.in);
System.out.print("Please choose row");
int choosenRow = input.nextInt();
System.out.print("Please choose cell");
int choosenCell = input.nextInt();
for (int i=0; i<rowCounter+1; i++){
String data =sheet1.getRow(choosenRow).getCell(choosenCell).getStringCellValue();
System.out.println("Data from Row"+i+" is "+data);
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
答案 0 :(得分:1)
首先,您不必遍历单元格和行,知道如果选择一行和一个单元格,则期望一个值。其次,您必须在执行getStringCellValue()
之前验证单元格的类型,因为如果该值不是String
,则可能会发生异常。
这是我想出的一种尝试,希望对您有所帮助。
public static void main(String[] args) {
try {
// Specify the path of file
File path=new File("/Users/monasaad1/Desktop/emp.xlsx");
// load file
FileInputStream file = new FileInputStream(path);
// load workbook
XSSFWorkbook workbook = new XSSFWorkbook(file);
// Load sheet- Here we are loading first sheetonly
XSSFSheet sheet1 = workbook.getSheetAt(0);
// user input row & cell
Scanner input = new Scanner(System.in);
System.out.print("Please choose row");
int choosenRow = input.nextInt();
System.out.print("Please choose cell");
int choosenCell = input.nextInt();
String data = sheet1.getRow(choosenRow).getCell(choosenCell).toString();// may return null if the choosen row and/or cell goes beyond
// the rows count and/or the cells count
System.out.println(String.format("Data from Row %d and cell %d is %s", choosenRow, choosenCell, data));
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
编辑:(基于以下评论):
要打印除密码外的整个行,请使用以下命令:
public static void main(String[] args) {
//.... Skipped identical lines as above
System.out.print("Please choose row");
int chosenRow = input.nextInt();
StringBuilder stringBuilder = new StringBuilder();
XSSFRow row = sheet1.getRow(chosenRow);
int i = 0;
for (; i < row.getPhysicalNumberOfCells() - 1; i++) {
if (i == 2) {
continue;// skipping the password cell
}
stringBuilder.append(row.getCell(i))
.append(" | ");
}
stringBuilder.append(row.getCell(i));
String data = stringBuilder.toString();
System.out.println(String.format("Data from Row %d are :%s", chosenRow, data));
//.... Skipped identical lines as above
}