基于Apache POI 从xlsx读出数据

【0】写在前面

• 0.1） these codes are from 基于Apache POI 的从xlsx读出数据
• 0.2） this idea is from http://cwind.iteye.com/blog/2187670 , adding some comments for easy understanding proves to be my work.

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package com.cwind.poi;
import java.io.File;
import java.io.FileInputStream;
import java.util.Iterator;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class SimpleDatasheetReader {

    public static void main(String[] args){

        try {
            File excel = new File("E:/bench-cluster/temp-resource/RunningMan.xlsx");
            FileInputStream fis = new FileInputStream(excel);

//创建工作簿

            XSSFWorkbook book = new XSSFWorkbook(fis);

//创建工作簿下的第一页纸张

            XSSFSheet sheet = book.getSheetAt(0);

// 基于行的迭代器

            Iterator<Row> itr = sheet.iterator();
            System.out.println(itr.hasNext());

// Iterating over Excel file in Java

            while (itr.hasNext()) {

//得到行

                Row row = itr.next();                   System.out.println(row.getLastCellNum());

// Iterating over each column of Excel file

// 基于行创建单元格 迭代器

                Iterator<Cell> cellIterator = row.cellIterator();
                while (cellIterator.hasNext()) {

//依次 获取某行的单元格

                    Cell cell = cellIterator.next();

                    switch (cell.getCellType()) {

//下面是依据不同数据类型 打印出单元格的 数据

                        case Cell.CELL_TYPE_STRING:
                        System.out.print(cell.getStringCellValue() + "\t");
                        break;
                    case Cell.CELL_TYPE_NUMERIC:
                        if(DateUtil.isCellDateFormatted(cell)){
                            System.out.print(cell.getDateCellValue() + "\t");
                        }else{
                            System.out.print(cell.getNumericCellValue() + "\t");
                        }

                        break;
                    case Cell.CELL_TYPE_BOOLEAN:
                        System.out.print(cell.getBooleanCellValue() + "\t");
                        break;
                    default:

                    }
                }
                System.out.println("");
            }
        }catch(Exception ex){
            ex.printStackTrace();
        }
    }
}