java生成excel甘特图

生成效果如下：

代码：

public class GenerateGanttChart3 {
//    创建数据public static ProjectEntity generateData() {List<ProjectEntity> projectEntityList = new ArrayList<>();List<UnitEntity> unitEntityList = new ArrayList<>();UnitEntity unitEntity = new UnitEntity("单体1", "安装单元1", "前置任务1", LocalDate.parse("2022-07-01"), LocalDate.parse("2022-07-02"));unitEntityList.add(unitEntity);unitEntity = new UnitEntity("单体1", "安装单元2", "前置任务2", LocalDate.parse("2022-07-02"), LocalDate.parse("2022-07-25"));unitEntityList.add(unitEntity);unitEntity = new UnitEntity("单体2", "安装单元1", "前置任务1",LocalDate.parse("2022-07-03"), LocalDate.parse("2022-07-13"));unitEntityList.add(unitEntity);unitEntity = new UnitEntity("单体2", "安装单元2", "前置任务2",LocalDate.parse("2022-07-13"), LocalDate.parse("2022-07-16"));unitEntityList.add(unitEntity);unitEntity = new UnitEntity("单体2", "安装单元3", "前置任务3",LocalDate.parse("2022-07-16"), LocalDate.parse("2022-07-20"));unitEntityList.add(unitEntity);unitEntity = new UnitEntity("单体2", "安装单元4", "前置任务4",LocalDate.parse("2022-07-20"), LocalDate.parse("2022-09-23"));unitEntityList.add(unitEntity);unitEntity = new UnitEntity("单体3", "安装单元1", "前置任务1",LocalDate.parse("2022-07-10"), LocalDate.parse("2022-08-13"));unitEntityList.add(unitEntity);unitEntity = new UnitEntity("单体3", "安装单元2", "前置任务2",LocalDate.parse("2022-07-13"), LocalDate.parse("2022-08-23"));unitEntityList.add(unitEntity);ProjectEntity projectEntity1 = new ProjectEntity("项目编号1", "项目名称1", "合同编号1", "项目经理1", LocalDate.parse("2022-08-23"), unitEntityList);return projectEntity1;}//获取横向单元格总数量public static Map<String, Object> getCellNum(ProjectEntity projectEntity) {Map<String, Object> resultMap = new HashMap<>();//前面固定有五列int preCellNum = 5;//循环数据 获取最大日期和最小日期并得到天数查LocalDate minDate = projectEntity.getEntityList().get(0).getStartTime();LocalDate maxDate = projectEntity.getEntityList().get(0).getEndTime();for (int i = 0; i < projectEntity.getEntityList().size(); i ++) {if (projectEntity.getEntityList().get(i).getStartTime().isBefore(minDate)) {minDate = projectEntity.getEntityList().get(i).getStartTime();}if (projectEntity.getEntityList().get(i).getEndTime().isAfter(maxDate)) {maxDate = projectEntity.getEntityList().get(i).getEndTime();}}int dayDiff = (int) (maxDate.toEpochDay()-minDate.toEpochDay());int totalCellNum = preCellNum + dayDiff;// 修改 判断mindate是否为周一 如果不是 加int weekNum = WeekEnum.getWeekDayByCode(String.valueOf(minDate.getDayOfWeek()));if (weekNum != 1) {minDate = minDate.plusDays(-weekNum + 1);dayDiff = dayDiff + weekNum - 1;totalCellNum = totalCellNum + weekNum - 1;}int weekNumMax = WeekEnum.getWeekDayByCode(String.valueOf(maxDate.getDayOfWeek()));if (weekNumMax != 7) {dayDiff = dayDiff + 7 - weekNumMax;totalCellNum = totalCellNum + 7 - weekNumMax;}resultMap.put("minDate", minDate);resultMap.put("maxDate", maxDate);resultMap.put("totalCellNum", totalCellNum);resultMap.put("dayDiff", dayDiff);System.out.println(resultMap);return resultMap;}//生成甘特图public static void generateGantt() {XSSFWorkbook wb = new XSSFWorkbook();XSSFSheet sheet = wb.createSheet("甘特图");//背景色为鲜红色XSSFCellStyle redBackgroundStyle = wb.createCellStyle();redBackgroundStyle.setFillForegroundColor(IndexedColors.LIGHT_GREEN.getIndex());redBackgroundStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);//背景色为绿色XSSFCellStyle greenBackgroundStyle = wb.createCellStyle();greenBackgroundStyle.setFillForegroundColor(IndexedColors.LIGHT_BLUE.getIndex());greenBackgroundStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);ProjectEntity projectEntity = generateData();Map<String, Object> resultMap = getCellNum(projectEntity);for (int i = 0; i <= 4; i++) {sheet.setColumnWidth(i, (int) (12 * 256.0D));}for (int i = 5; i <= (Integer) resultMap.get("totalCellNum"); i++) {sheet.setColumnWidth(i, (int) (4 * 256.0D));}//        日期格式XSSFCellStyle dateStyle = wb.createCellStyle();CreationHelper createHelper = wb.getCreationHelper();dateStyle.setDataFormat(createHelper.createDataFormat().getFormat("yyyy/mm/dd;@"));dateStyle.setAlignment(HorizontalAlignment.CENTER);dateStyle.setVerticalAlignment(VerticalAlignment.CENTER);//        居中格式XSSFCellStyle centerStyle = wb.createCellStyle();centerStyle.setAlignment(HorizontalAlignment.CENTER);centerStyle.setVerticalAlignment(VerticalAlignment.CENTER);//        左对齐XSSFCellStyle leftStyle = wb.createCellStyle();leftStyle.setAlignment(HorizontalAlignment.LEFT);leftStyle.setVerticalAlignment(VerticalAlignment.CENTER);// 前面固定列数int preFixedCellNum = 5;//        第一行XSSFRow row1 = sheet.createRow(0);XSSFCell cell10 = row1.createCell(0);cell10.setCellValue("项目计划更新甘特图");cell10.setCellStyle(centerStyle);CellRangeAddress cellRangeAddress10 = new CellRangeAddress(0, 0, 0, (Integer) resultMap.get("totalCellNum"));sheet.addMergedRegion(cellRangeAddress10);//      第二行XSSFRow row2 = sheet.createRow(1);XSSFCell cell20 = row2.createCell(0);cell20.setCellValue("项目编号:" + projectEntity.getProjectCode());cell20.setCellStyle(leftStyle);CellRangeAddress cellRangeAddress20 = new CellRangeAddress(1, 1, 0, 2);sheet.addMergedRegion(cellRangeAddress20);XSSFCell cell23 = row2.createCell(3);cell23.setCellValue("合同编号:" + projectEntity.getContractCode());cell23.setCellStyle(leftStyle);CellRangeAddress cellRangeAddress23 = new CellRangeAddress(1, 1, 3, 5);sheet.addMergedRegion(cellRangeAddress23);//      第三行XSSFRow row3 = sheet.createRow(2);XSSFCell cell30 = row3.createCell(0);cell30.setCellValue("项目名称:" + projectEntity.getProjectName());cell30.setCellStyle(leftStyle);CellRangeAddress cellRangeAddress30 = new CellRangeAddress(2, 2, 0, 2);sheet.addMergedRegion(cellRangeAddress30);//      第四行XSSFRow row4 = sheet.createRow(3);XSSFCell cell40 = row4.createCell(0);cell40.setCellValue("项目预计完成时间:" + projectEntity.getPlanCompleteTime());cell40.setCellStyle(leftStyle);CellRangeAddress cellRangeAddress40 = new CellRangeAddress(3, 3, 0, 2);sheet.addMergedRegion(cellRangeAddress40);XSSFCell cell43 = row2.createCell(3);cell43.setCellValue("项目经理:" + projectEntity.getProjectMaster());cell43.setCellStyle(leftStyle);CellRangeAddress cellRangeAddress43 = new CellRangeAddress(3, 3, 3, 5);sheet.addMergedRegion(cellRangeAddress43);//      第五行XSSFRow row5 = sheet.createRow(4);XSSFCell cell50 = row5.createCell(0);cell50.setCellValue("单体名称");cell50.setCellStyle(centerStyle);CellRangeAddress cellRangeAddress50 = new CellRangeAddress(4, 5, 0, 0);sheet.addMergedRegion(cellRangeAddress50);XSSFCell cell51 = row5.createCell(1);cell51.setCellValue("安装单元编号");cell51.setCellStyle(centerStyle);CellRangeAddress cellRangeAddress51 = new CellRangeAddress(4, 5, 1, 1);sheet.addMergedRegion(cellRangeAddress51);XSSFCell cell52 = row5.createCell(2);cell52.setCellValue("前置任务");cell52.setCellStyle(centerStyle);CellRangeAddress cellRangeAddress52 = new CellRangeAddress(4, 5, 2, 2);sheet.addMergedRegion(cellRangeAddress52);XSSFCell cell53 = row5.createCell(3);cell53.setCellValue("开始时间");cell53.setCellStyle(centerStyle);CellRangeAddress cellRangeAddress53 = new CellRangeAddress(4, 5, 3, 3);sheet.addMergedRegion(cellRangeAddress53);XSSFCell cell54 = row5.createCell(4);cell54.setCellValue("结束时间");cell54.setCellStyle(centerStyle);CellRangeAddress cellRangeAddress54 = new CellRangeAddress(4, 5, 4, 4);sheet.addMergedRegion(cellRangeAddress54);//日期int dayDiff = (Integer) resultMap.get("dayDiff");LocalDate minDate = (LocalDate) resultMap.get("minDate");for (int i = 0; i <= dayDiff; i++) {XSSFCell cell5 = row5.createCell(preFixedCellNum + i);cell5.setCellValue(minDate.plusDays(i));cell5.setCellStyle(dateStyle);}//      第六行// 修改XSSFRow row6 = sheet.createRow(5);for (int i = 0; i <= dayDiff; i++) {LocalDate date = LocalDate.from(row5.getCell(preFixedCellNum + i).getLocalDateTimeCellValue());XSSFCell cell6 = row6.createCell(preFixedCellNum + i);cell6.setCellValue(String.valueOf(date.getDayOfMonth()));cell6.setCellStyle(dateStyle);}int insertIndex = 0;int toIndex = 0;LocalDate minDate2 = null;LocalDate maxDate2 = null;for (int i = 0; i < projectEntity.getEntityList().size() - 1; i++) {//获取第0列和第1列每行单元格的   值 如果相等 将合并列的数量加一String name1 = projectEntity.getEntityList().get(i).getSingleBodyName();String name2 = projectEntity.getEntityList().get(i + 1).getSingleBodyName();if (name2.equals(name1)) {toIndex ++;} else {// 获取最大日期和最小日期//循环数据 获取最大日期和最小日期并得到天数查minDate2 = projectEntity.getEntityList().get(insertIndex).getStartTime();maxDate2 = projectEntity.getEntityList().get(toIndex).getEndTime();for (int j = insertIndex; j < toIndex; j++ ) {if (projectEntity.getEntityList().get(i).getStartTime().isBefore(minDate2)) {minDate2 = projectEntity.getEntityList().get(i).getStartTime();}if (projectEntity.getEntityList().get(i).getEndTime().isAfter(maxDate2)) {maxDate2 = projectEntity.getEntityList().get(i).getEndTime();}}UnitEntity unitEntity = new UnitEntity(projectEntity.getEntityList().get(i).getSingleBodyName(), "", "", minDate2, maxDate2);projectEntity.getEntityList().add(insertIndex, unitEntity);i++;insertIndex = i + 1;toIndex = i + 1;}if (i == projectEntity.getEntityList().size() - 2) {minDate2 = projectEntity.getEntityList().get(insertIndex).getStartTime();maxDate2 = projectEntity.getEntityList().get(toIndex).getEndTime();for (int j = insertIndex; j < toIndex; j++ ) {if (projectEntity.getEntityList().get(i).getStartTime().isBefore(minDate2)) {minDate2 = projectEntity.getEntityList().get(i).getStartTime();}if (projectEntity.getEntityList().get(i).getEndTime().isAfter(maxDate2)) {maxDate2 = projectEntity.getEntityList().get(i).getEndTime();}}UnitEntity unitEntity = new UnitEntity(projectEntity.getEntityList().get(i).getSingleBodyName(), "", "", minDate2, maxDate2);projectEntity.getEntityList().add(insertIndex, unitEntity);break;}}//        第七行Boolean UnitFlag = Boolean.TRUE;for (int i = 0; i < projectEntity.getEntityList().size(); i++) {XSSFRow row7 = sheet.createRow(6 + i);for (int j = 0; j <= (Integer) resultMap.get("totalCellNum"); j++) {XSSFCell cell70 = row7.createCell(j);LocalDate startTime = projectEntity.getEntityList().get(i).getStartTime();LocalDate endTime = projectEntity.getEntityList().get(i).getEndTime();if (j == 0) {if (projectEntity.getEntityList().get(i).getUnitCode() == null || "".equals(projectEntity.getEntityList().get(i).getUnitCode())) {cell70.setCellValue(projectEntity.getEntityList().get(i).getSingleBodyName());cell70.setCellStyle(centerStyle);UnitFlag = Boolean.FALSE;} else {UnitFlag = Boolean.TRUE;}} else if (j == 1) {cell70.setCellValue(projectEntity.getEntityList().get(i).getUnitCode());cell70.setCellStyle(centerStyle);} else if (j == 2) {cell70.setCellValue(projectEntity.getEntityList().get(i).getPreUnitCodes());cell70.setCellStyle(centerStyle);} else if (j == 3) {cell70.setCellValue(startTime);cell70.setCellStyle(dateStyle);} else if (j == 4) {cell70.setCellValue(endTime);cell70.setCellStyle(dateStyle);} else {//如果 第五行该单元格的值 在当前行开始时间和结束时间之内 改变单元格背景颜色//获取第二行第j列的值LocalDate theTime = row5.getCell(j).getLocalDateTimeCellValue().toLocalDate();if ((theTime.isAfter(startTime) || theTime.equals(startTime))&& (theTime.isBefore(endTime) || theTime.equals(endTime))) {if (UnitFlag == Boolean.FALSE) {
//                            单体颜色cell70.setCellStyle(greenBackgroundStyle);} else {cell70.setCellStyle(redBackgroundStyle);}}}}}//日期合并int begin = 5;int end = 5;boolean flag = false;
//        当前周第一个时间LocalDate beforeTime = null;
//        前一个单元格的时间LocalDate beforeDate = null;String cellValue = null;for (int i = 0; i <= dayDiff; i++) {if (i >= 1 && flag) {beforeTime = beforeDate;flag = false;}if (beforeTime != null) {
//                如果属于同一周if (checkWeekBetween(beforeTime,minDate.plusDays(i))) {end ++;beforeDate = minDate.plusDays(i);} else {if (begin != end) {CellRangeAddress cellRangeAddressEnd = new CellRangeAddress(4, 4, begin, end);sheet.addMergedRegion(cellRangeAddressEnd);}beforeTime = null;if (cellValue == null) {cellValue = beforeDate.format(DateTimeFormatter.ofPattern("yyyy/M/d"));} else {cellValue = cellValue + beforeDate.format(DateTimeFormatter.ofPattern("yyyy/M/d"));}beforeDate = minDate.plusDays(i);row5.getCell(begin).setCellValue(cellValue);row5.getCell(begin).setCellStyle(dateStyle);begin = end + 1;end = begin;cellValue = beforeDate.format(DateTimeFormatter.ofPattern("yyyy/M/d")) + "-";flag = true;}} else {beforeDate = minDate.plusDays(i);cellValue = beforeDate.format(DateTimeFormatter.ofPattern("yyyy/M/d")) + "-";flag = true;}if (i == dayDiff) {if (!cellValue.contains(beforeDate.format(DateTimeFormatter.ofPattern("yyyy/M/d")))) {cellValue = cellValue + beforeDate.format(DateTimeFormatter.ofPattern("yyyy/M/d"));} else {cellValue = beforeDate.format(DateTimeFormatter.ofPattern("yyyy/M/d"));}row5.getCell(begin).setCellValue(cellValue);row5.getCell(begin).setCellStyle(dateStyle);if (begin != end) {CellRangeAddress cellRangeAddressEnd = new CellRangeAddress(4, 4, begin, end);sheet.addMergedRegion(cellRangeAddressEnd);}}}try {FileOutputStream fout = new FileOutputStream("D:\\文件\\公司\\需求\\甘特图\\甘特图3.xlsx");wb.write(fout);fout.close();System.out.println("excel生成成功");} catch (IOException e) {System.out.println("excel生成失败：" + e.getMessage());}}/*** 以second为主进行判断* 以first为开始时间，second为结束时间* 判断两个时间是否在通过一个周内。** @param first* @param second*/private static Boolean checkWeekBetween(LocalDate first, LocalDate second){
//        两个时间差不超过7天,Period period = Period.between(first,second);int years = period.getYears();if(years > 0){return false;}int months = period.getMonths();if(months > 0){return false;}int days = period.getDays();if(days == 0){
//          表明是同一天return true;}if(days > 7  || days < -7){
//            两个时间差 超出了7天return false;}int firstDayOfWeek = first.getDayOfWeek().getValue();int secondDayOfWeek = second.getDayOfWeek().getValue();if(secondDayOfWeek == 1){if(oneDay(firstDayOfWeek,secondDayOfWeek,days)){return true;}else {return false;}}if(secondDayOfWeek == 7){if(sevenDay(firstDayOfWeek,secondDayOfWeek,days)){return true;}else {return false;}}if(otherDay(firstDayOfWeek,secondDayOfWeek,days)){return true;}else{return false;}}/*** secondDayOfWeek 是所在星期的第一天* 星期的第一天 数据处理* @return*/private static Boolean oneDay(int firstDayOfWeek,int secondDayOfWeek,int days){if(days > 0 ){
//            表明 first 比second 小 不在同一周return false;}else {
//            表明 first 比second 大if(secondDayOfWeek - days == firstDayOfWeek){return true;}}return false;}/*** 星期的第7天的时候处理数据* @return*/private static Boolean sevenDay(int firstDayOfWeek,int secondDayOfWeek,int days){
//        second 是周日if(firstDayOfWeek + days == secondDayOfWeek){return true;}return false;}/*** 其他天的数据处理* @return*/private static Boolean otherDay(int firstDayOfWeek,int secondDayOfWeek,int days){if(days < 0){
//              表明 first 比 second 大if((secondDayOfWeek - days) == firstDayOfWeek){
//                    两者是 一周内return true;}}else {
//          表明 first 比 second 小if(firstDayOfWeek + days == secondDayOfWeek){//                    两者是 一周内return true;}}return false;}public static void main(String[] args) {generateGantt();}
}

ProjectEntity类：

public class ProjectEntity {private String projectCode;private String projectName;private String contractCode;private String projectMaster;private LocalDate planCompleteTime;private List<UnitEntity> entityList;private String singleBodyName;private String unitCode;private String preUnitCodes;private LocalDate startTime;private LocalDate endTime;public ProjectEntity(String projectCode, String singleBodyName, String unitCode, LocalDate startTime, LocalDate endTime) {this.projectCode = projectCode;this.singleBodyName = singleBodyName;this.unitCode = unitCode;this.startTime = startTime;this.endTime = endTime;}public String getSingleBodyName() {return singleBodyName;}public void setSingleBodyName(String singleBodyName) {this.singleBodyName = singleBodyName;}public String getUnitCode() {return unitCode;}public void setUnitCode(String unitCode) {this.unitCode = unitCode;}public String getPreUnitCodes() {return preUnitCodes;}public void setPreUnitCodes(String preUnitCodes) {this.preUnitCodes = preUnitCodes;}public LocalDate getStartTime() {return startTime;}public void setStartTime(LocalDate startTime) {this.startTime = startTime;}public LocalDate getEndTime() {return endTime;}public void setEndTime(LocalDate endTime) {this.endTime = endTime;}public ProjectEntity(String projectCode, String projectName, String contractCode, String projectMaster, LocalDate planCompleteTime, List<UnitEntity> entityList) {this.projectCode = projectCode;this.projectName = projectName;this.contractCode = contractCode;this.projectMaster = projectMaster;this.planCompleteTime = planCompleteTime;this.entityList = entityList;}public String getProjectCode() {return projectCode;}public void setProjectCode(String projectCode) {this.projectCode = projectCode;}public String getProjectName() {return projectName;}public void setProjectName(String projectName) {this.projectName = projectName;}public String getContractCode() {return contractCode;}public void setContractCode(String contractCode) {this.contractCode = contractCode;}public String getProjectMaster() {return projectMaster;}public void setProjectMaster(String projectMaster) {this.projectMaster = projectMaster;}public LocalDate getPlanCompleteTime() {return planCompleteTime;}public void setPlanCompleteTime(LocalDate planCompleteTime) {this.planCompleteTime = planCompleteTime;}public List<UnitEntity> getEntityList() {return entityList;}public void setEntityList(List<UnitEntity> entityList) {this.entityList = entityList;}}

UnitEntity类：

public class UnitEntity {private String singleBodyName;private String unitCode;private String preUnitCodes;private LocalDate startTime;private LocalDate endTime;public UnitEntity(String singleBodyName, String unitCode, String preUnitCodes, LocalDate startTime, LocalDate endTime) {this.singleBodyName = singleBodyName;this.unitCode = unitCode;this.preUnitCodes = preUnitCodes;this.startTime = startTime;this.endTime = endTime;}public String getSingleBodyName() {return singleBodyName;}public void setSingleBodyName(String singleBodyName) {this.singleBodyName = singleBodyName;}public String getUnitCode() {return unitCode;}public void setUnitCode(String unitCode) {this.unitCode = unitCode;}public String getPreUnitCodes() {return preUnitCodes;}public void setPreUnitCodes(String preUnitCodes) {this.preUnitCodes = preUnitCodes;}public LocalDate getStartTime() {return startTime;}public void setStartTime(LocalDate startTime) {this.startTime = startTime;}public LocalDate getEndTime() {return endTime;}public void setEndTime(LocalDate endTime) {this.endTime = endTime;}
}

WeekEnum类：

public enum WeekEnum {MONDAY("MONDAY",1,"星期一"),TUESDAY("TUESDAY",2,"星期二"),WEDNESDAY("WEDNESDAY",3,"星期三"),THURSDAY("THURSDAY",4,"星期四"),FRIDAY("FRIDAY",5,"星期五"),SATURDAY("SATURDAY",6,"星期六"),SUNDAY("SUNDAY",7,"星期日");private String code;private Integer weekDay;private String des;public String getCode() {return code;}public Integer getWeekDay() {return weekDay;}public String getDes() {return des;}WeekEnum(String code, Integer weekDay, String des) {this.code = code;this.weekDay = weekDay;this.des = des;}/*** 根据code 得到对应的 周（几）数字* @param code* @return*/public static Integer getWeekDayByCode(String code) {Integer result = null;for (WeekEnum order : WeekEnum.values()) {if (StringUtils.equals(order.getCode(),code)) {result = order.getWeekDay();break;}}return result;}/*** 根据code 得到对应的 周（几）描述* @param code* @return*/public static String getDesByCode(String code) {String result = null;for (WeekEnum order : WeekEnum.values()) {if (StringUtils.equals(order.getCode(),code)) {result = order.getDes();break;}}return result;}}

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