【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();}}
}