基于Apache POI 向xlsx写入数据

【0】写在前面

• 0.1） these codes are from 基于Apache POI 的向xlsx写入数据
• 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.FileOutputStream;import org.apache.poi.hssf.usermodel.HSSFWorkbook;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.Row;import org.apache.poi.ss.usermodel.Sheet;import org.apache.poi.ss.usermodel.Workbook;import org.apache.poi.xssf.usermodel.XSSFWorkbook;/** * @author Billy Chen */public class SimpleDatasheetWriter {    private static final String[] titles = {            "姓名", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday"};    //sample data to fill the sheet.    private static final String[][] data = {            {"AngelaBaby", "跑了", "跑了", "跑了", "跑了", "跑了"},            {"邓超", "跑了", "跑了", "没跑", "跑了", "跑了" },            {"王祖蓝", "没跑", "没跑", "没跑", "跑了", "跑了" },            {"王宝强", "跑了", "跑了", "跑了", "跑了", "跑了" },            {"郑恺", "跑了", "跑了", "跑了", "跑了", "跑了" }    };    public static void main(String[] args) throws Exception {        Workbook wb;

//创建工作簿

        if(args.length > 0 && args[0].equals("-xls"))             wb = new HSSFWorkbook();        else            wb = new XSSFWorkbook();

//创建名为 Running Man 的纸张

        Sheet sheet = wb.createSheet("Running Man");

//创建行坐标为0的行（为什么管它叫坐标，不把它叫做行，呵呵）

        Row headerRow = sheet.createRow(0);

//设置行高

        headerRow.setHeightInPoints(12.75f);        for (int i = 0; i < titles.length; i++) {

//创建行坐标为0的单元格，且其列坐标为i；

            Cell cell = headerRow.createCell(i);

//设置单元格的value

            cell.setCellValue(titles[i]);         }        Row row;        Cell cell;        int rownum = 1;        for (int i = 0; i < data.length; i++, rownum++) {

//创建行坐标为rownum 的行

            row = sheet.createRow(rownum);             if(data[i] == null) continue;            for (int j = 0; j < data[i].length; j++) {

// 为行创建单元格；

                cell = row.createCell(j); 

// 设置单元格的value

                cell.setCellValue(data[i][j]);                             }        }        System.out.println("Default column width: " + sheet.getRow(0).getLastCellNum());        System.out.println("Default column width: " + sheet.getRow(0).getPhysicalNumberOfCells());

// Write the output to a file

        String file = "E:/bench-cluster/temp-resource/RunningMan.xlsx";        if(wb instanceof XSSFWorkbook) file += "x";        FileOutputStream out = new FileOutputStream(file);        wb.write(out);        out.close();//        BufferedWriter bw = new BufferedWriter(new FileWriter(file));    }}