使用Java编写Excel传统课表转日历格式

今天遇到一个让她比较苦恼的事情，她手上有一大堆传统Excel格式的课程安排表，现在想将他们全搞成日历格式的，她只能手动一个一个搞，效率很低也很无聊，帮她做了个小工具，通过工具实现格式转换，解放双手！

原来的数据格式是这样：

转完的格式是这样的：

思路：
1.原表格中的数据可以抽象成一个类，类中的属性对应原表格中的列。

package xiaming.chen.domain;/*** Created by xiamingchen on 2017/7/1.*/
public class Info {private String date;private String timeBegin;private String course;private int hours;private String teacher;public String getDate() {return date;}public void setDate(String date) {this.date = date;}public String getTimeBegin() {return timeBegin;}public void setTimeBegin(String timeBegin) {this.timeBegin = timeBegin;}public String getCourse() {return course;}public void setCourse(String course) {this.course = course;}public int getHours() {return hours;}public void setHours(int hours) {this.hours = hours;}public String getTeacher() {return teacher;}public void setTeacher(String teacher) {this.teacher = teacher;}@Overridepublic String toString() {return course + "-" + teacher;}
}

2.先将原表格中的数据读取出来，生成一堆的Info对象。
3.初始化新的Excel，将第一列的课表时间安排写入。
4.将日期写入表格，并返回日期总数
5.将每节课的信息填入表内

package xiaming.chen;import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.*;
import xiaming.chen.domain.Info;
import xiaming.chen.util.TimeFormatUtil;import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;/*** 为鸭蛋私人订制的Excel转换工具*/
public class ExcelConvertor {private static final String inputFile = "/Users/xiamingchen/Desktop/test.xlsx";private static final String outputFile = "/Users/xiamingchen/Downloads/test/test.xlsx";private static final int rowBeginNum = 4;private static String line1, line2, line3;public static void main(String[] args) throws IOException, InvalidFormatException {List<Info> infoList = parseInfoFromInputFile(inputFile, rowBeginNum);initExcel(outputFile);List<String> dateList = writeDateToExcel(outputFile, infoList);writeTitleToExcel(outputFile, dateList.size());writeInfoToExcel(outputFile, infoList, dateList);}private static void writeTitleToExcel(String destPath, int columnNum) throws IOException {FileInputStream fis = new FileInputStream(destPath);XSSFWorkbook wb = new XSSFWorkbook(fis);XSSFSheet sheet = wb.getSheetAt(0);XSSFRow row1 = sheet.createRow(0);createTitleRow(row1, line1, wb);XSSFRow row2 = sheet.createRow(1);createTitleRow(row2, line2, wb);XSSFRow row3 = sheet.createRow(2);createTitleRow(row3, line3, wb);CellRangeAddress cellRangeAddress1 = new CellRangeAddress(0, 0, 0, columnNum);CellRangeAddress cellRangeAddress2 = new CellRangeAddress(1, 1, 0, columnNum);CellRangeAddress cellRangeAddress3 = new CellRangeAddress(2, 2, 0, columnNum);sheet.addMergedRegion(cellRangeAddress1);sheet.addMergedRegion(cellRangeAddress2);sheet.addMergedRegion(cellRangeAddress3);fis.close();FileOutputStream fos = new FileOutputStream(destPath);wb.write(fos);fos.close();}private static XSSFRow createTitleRow(XSSFRow row, String value, XSSFWorkbook wb) {XSSFCell cell = row.createCell(0);cell.setCellValue(value);XSSFCellStyle cellStyle = wb.createCellStyle();cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);cellStyle.setAlignment(HorizontalAlignment.CENTER);cellStyle.setFillForegroundColor(IndexedColors.PALE_BLUE.index);cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);cell.setCellStyle(cellStyle);return row;}private static void writeInfoToExcel(String destPath, List<Info> infoList, List<String> dateList) throws IOException {FileInputStream fis = new FileInputStream(destPath);XSSFWorkbook wb = new XSSFWorkbook(fis);XSSFSheet sheet = wb.getSheetAt(0);for (int i=0; i<infoList.size(); ++i) {Info info = infoList.get(i);int column = dateList.indexOf(info.getDate()) + 1; //+1是因为第一列不是有效列int rowOfBegin = getIndexOfBeginTime(info.getTimeBegin(), sheet);int rowOfEnd = rowOfBegin + info.getHours() * 2 - 1;XSSFRow row = sheet.getRow(rowOfBegin);XSSFCell cell = row.createCell(column);System.out.println(info.getDate() + " - " + column);cell.setCellValue(info.toString());CellRangeAddress cellRangeAddress = new CellRangeAddress(rowOfBegin, rowOfEnd, column, column);sheet.addMergedRegion(cellRangeAddress);XSSFCellStyle cellStyle = wb.createCellStyle();cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);cellStyle.setAlignment(HorizontalAlignment.CENTER);cellStyle.setFillForegroundColor(IndexedColors.PALE_BLUE.index);cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);cell.setCellStyle(cellStyle);sheet.autoSizeColumn(column, true);}fis.close();FileOutputStream fos = new FileOutputStream(destPath);wb.write(fos);fos.close();}private static List<String> writeDateToExcel(String destPath, List<Info> infoList) throws IOException, InvalidFormatException {List<String> dateList = new ArrayList<String>();FileInputStream fis = new FileInputStream(destPath);XSSFWorkbook wb = new XSSFWorkbook(fis);XSSFSheet sheet = wb.getSheetAt(0);//生成第一行 日期int column = 1;//因为第一(0)行无效，所以从第二(1)行开始for (int i = 0; i < infoList.size(); ++i) {if (dateList.contains(infoList.get(i).getDate())) {continue;}XSSFRow dateRow;if (i == 0) {dateRow = sheet.createRow(3);} else {dateRow = sheet.getRow(3);}XSSFCell dateCell = dateRow.createCell(column);dateCell.setCellValue(infoList.get(i).getDate());column++;dateList.add(infoList.get(i).getDate());}fis.close();FileOutputStream fos = new FileOutputStream(destPath);wb.write(fos);fos.close();return dateList;}private static int getIndexOfBeginTime(String beginTime, XSSFSheet sheet) {int sum = sheet.getLastRowNum();for (int i=rowBeginNum; i<=sum; ++i) {String eachTime = sheet.getRow(i).getCell(0).getStringCellValue();if (beginTime.equals(eachTime)) {return i;}}return -1;}private static void initExcel(String destPath) throws IOException {float start = 8.5F;//每天最早八点半开始float end = 21.0F;//每天最晚21点结束int rowNum = rowBeginNum;//空4行，从第5行开始往下排时间FileOutputStream fos = new FileOutputStream(destPath);XSSFWorkbook wb = new XSSFWorkbook();XSSFSheet sheet = wb.createSheet();for (float i = start; i <= end; i = i + 0.5F, rowNum++) {XSSFRow row = sheet.createRow(rowNum);XSSFCell time = row.createCell(0);int minute = (int) (i * 10) % 10;String minuteStr = (minute == 5 ? "30" : "00");time.setCellValue((int) i + ":" + minuteStr);}wb.write(fos);fos.close();}private static List<Info> parseInfoFromInputFile(String inputFilePath, int rowBegin) throws IOException {List<Info> infoList = new ArrayList<Info>();FileInputStream fileInput = new FileInputStream(inputFilePath);XSSFWorkbook wb = new XSSFWorkbook(fileInput);XSSFSheet sheet = wb.getSheetAt(0);int lastRowNum = sheet.getLastRowNum(); //内容的最后一行的行数XSSFRow row1 = sheet.getRow(0);line1 = row1.getCell(0).getStringCellValue();XSSFRow row2 = sheet.getRow(1);line2 = row2.getCell(0).getStringCellValue();XSSFRow row3 = sheet.getRow(2);line3 = row3.getCell(0).getStringCellValue();for (int i = rowBegin; i < lastRowNum; ++i) {XSSFRow row = sheet.getRow(i);if (row.getCell(0).getDateCellValue() == null) { //遇到无效行，结束break;}Info info = new Info();Date date = row.getCell(0).getDateCellValue();info.setDate(TimeFormatUtil.formatDate(date));int hours = (int) row.getCell(3).getNumericCellValue();info.setHours(hours);String time = row.getCell(1).getStringCellValue();String[] times = time.split("-");info.setTimeBegin(TimeFormatUtil.formatTime(times[0]));String course = row.getCell(2).getStringCellValue();info.setCourse(course);String teacher = row.getCell(4).getStringCellValue();info.setTeacher(teacher);infoList.add(info);}wb.close();fileInput.close();return infoList;}}

还有一个处理时间和日期的工具类：

package xiaming.chen.util;import java.text.SimpleDateFormat;
import java.util.Date;/*** Created by xiamingchen on 2017/7/1.*/
public class TimeFormatUtil {public static String formatDate(Date date) {SimpleDateFormat format = new SimpleDateFormat("MM/dd");return format.format(date);}public static String formatTime(String time) {int hour = Integer.parseInt(time.split(":")[0]);String minute = time.split(":")[1];if (hour < 8) { //小时数比8小，那就都是下午的hour = hour + 12;}return hour + ":" + minute;}}

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使用Java编写Excel传统课表转日历格式

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