Java POI 导入 导出 EXCEL

package org.apache.poi.ss.examples;

import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.usermodel.Font;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import java.io.FileOutputStream;
import java.util.Calendar;
import java.util.Map;
import java.util.HashMap;

/**
 * A  monthly calendar created using Apache POI. Each month is on a separate sheet.
 * 

 * Usage:
 * CalendarDemo -xls|xlsx 
 * 

 *
 * @author Yegor Kozlov
 */
public class CalendarDemo {

	private static final String[] days = {
			“Sunday“ “Monday“ “Tuesday“
			“Wednesday“ “Thursday“ “Friday“ “Saturday“};

	private static final String[]  months = {
			“January“ “February“ “March““April“ “May“ “June“

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    .......       754  2018-04-16 08:50  poi\.classpath

    .......        69  2018-04-16 08:50  poi\.gitignore

     文件          1  2018-06-26 16:02  poi\.gradle\4.4.1\fileChanges\last-build.bin

     文件         17  2018-06-26 16:02  poi\.gradle\4.4.1\fileHashes\fileHashes.lock

     文件       1238  2018-06-26 16:01  poi\.project

    .......       503  2018-04-16 08:50  poi\.settings\.jsdtscope

     文件        252  2018-06-26 16:01  poi\.settings\org.eclipse.buildship.core.prefs

    .......       364  2018-04-16 08:50  poi\.settings\org.eclipse.jdt.core.prefs

    .......       463  2018-04-16 08:50  poi\.settings\org.eclipse.wst.common.component

    .......       345  2018-04-16 08:50  poi\.settings\org.eclipse.wst.common.project.facet.core.xml

    .......        49  2018-04-16 08:50  poi\.settings\org.eclipse.wst.jsdt.ui.superType.container

    .......         6  2018-04-16 08:50  poi\.settings\org.eclipse.wst.jsdt.ui.superType.name

     文件       1517  2018-07-06 14:41  poi\build\classes\org\apache\poi\ss\examples\CalendarDemo.class

     文件       1111  2018-07-06 14:41  poi\build\classes\replace\ExcelReplaceDataVO.class

     文件       2754  2018-07-06 14:41  poi\build\classes\replace\ExcelUtil.class

     文件       1802  2018-07-06 14:41  poi\build\classes\replace\ReplaceExcelServlet.class

     文件       1536  2018-07-06 14:41  poi\build\classes\replace\TestExcelReplace.class

     文件       8225  2018-07-06 14:41  poi\build\classes\template\ExcelTemplate.class

     文件       1792  2018-07-06 14:41  poi\build\classes\template\TemplateServlet.class

     文件       1654  2018-07-06 14:41  poi\build\classes\template\TestTemplate.class

     文件       6531  2018-07-06 14:41  poi\build\classes\test\ReadExcel.class

     文件       2262  2018-07-06 14:41  poi\build\classes\test\ReadExcelServlet.class

     文件       1976  2018-07-06 14:41  poi\build\classes\testExport\Book.class

     文件       1799  2018-07-06 14:41  poi\build\classes\testExport\Excel2007Servlet.class

     文件       1787  2018-07-06 14:41  poi\build\classes\testExport\ExcelServlet.class

     文件      12159  2018-07-06 14:41  poi\build\classes\testExport\ExportExcel.class

     文件       1569  2018-07-06 14:41  poi\build\classes\testExport\Student.class

     文件      11721  2018-07-06 14:41  poi\build\classes\testExport\TestExportExcel.class

     文件       2057  2018-07-06 14:41  poi\build\classes\testExport\TestExportExcel2007.class

     文件       2233  2018-07-06 14:41  poi\build\classes\util\EPlatform.class

............此处省略81个文件信息