动态创建excel文件，动态合并单元格并提供下载
1.动态生成excel的原因
**
出现的效果：
**
员工姓名没有自动合并单元格，在http://jxls.sourceforge.net/reference/xls_area.html 上面找了半天没有相关的案例，于是就自己代码生成
2.动态生成excel文件，并动态合并单元格
package com.baptechs.zeus.domain.base.xls;
import com.baptechs.zeus.domain.headquarters.customerapp.posprepay.NozzleAuthExport;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFSheet;
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.util.CellRangeAddress;
import java.io.FileNotFoundException;
import java.io.OutputStream;
import java.util.List;
/**
* Created by Amence on 2017/9/14.
*
* 该类只针对动态创建 员工考核报表
*/
public class AttendanceXLSXUtil {
public static void createXLSX(List nozzleAuthExports, String startTime, String endTime, OutputStream os) throws FileNotFoundException {
//新建excel报表
HSSFWorkbook excel = new HSSFWorkbook();
//添加一个sheet，名字叫"加油工考核表"
HSSFSheet hssfSheet = excel.createSheet("加油工考核表");
//excel格式
HSSFCellStyle style = excel.createCellStyle();
//字体样式
HSSFFont font1 = excel.createFont();
CellRangeAddress cellRangeAddress1 = new CellRangeAddress(0, 2, 1, 10);
//在sheet里增加合并单元格
hssfSheet.addMergedRegion(cellRangeAddress1);
//生成第一行
Row row = hssfSheet.createRow(0);
Cell cell = row.createCell(1);
cell.setCellValue("加油站员工考核表");
_setBorder(style, font1, 26, true, HSSFCellStyle.ALIGN_CENTER);
cell.setCellStyle(style);
//在sheet里增加合并单元格时间
CellRangeAddress cellRangeAddress2 = new CellRangeAddress(4, 4, 1, 2);//第四行到第四行 第一列到第二列
hssfSheet.addMergedRegion(cellRangeAddress2);
//在sheet里增加合并单元格时间(获取)
CellRangeAddress cellRangeAddress3 = new CellRangeAddress(4, 4, 3, 4);
hssfSheet.addMergedRegion(cellRangeAddress3);
Row row1 = hssfSheet.createRow(4);
row1.setHeightInPoints(20);
Cell cell1 = row1.createCell(1);
cell1.setCellValue("开始时间：");
HSSFFont font = excel.createFont();
HSSFCellStyle style1 = excel.createCellStyle();
_setBorder(style1, font, 11, false, HSSFCellStyle.ALIGN_RIGHT);
cell1.setCellStyle(style1);
Cell cell2 = row1.createCell(3);
cell2.setCellValue(startTime);
HSSFCellStyle style2 = excel.createCellStyle();
_setBorder(style2, font, 11, false, HSSFCellStyle.ALIGN_LEFT);
cell2.setCellStyle(style2);
//在sheet里增加合并单元格 结束时间
CellRangeAddress cellRangeAddress4 = new CellRangeAddress(4, 4, 7, 8);
hssfSheet.addMergedRegion(cellRangeAddress4);
//在sheet里增加合并单元格时间(获取)
CellRangeAddress cellRangeAddress5 = new CellRangeAddress(4, 4, 9, 10);
hssfSheet.addMergedRegion(cellRangeAddress5);
Cell cell3 = row1.createCell(7);
cell3.setCellValue("结束时间：");
HSSFCellStyle style3 = excel.createCellStyle();
_setBorder(style3, font, 11, false, HSSFCellStyle.ALIGN_RIGHT);
cell3.setCellStyle(style3);
Cell cell4 = row1.createCell(9);
cell4.setCellValue(endTime);
HSSFCellStyle style4 = excel.createCellStyle();
_setBorder(style4, font, 11, false, HSSFCellStyle.ALIGN_LEFT);
cell4.setCellStyle(style4);
String[] title = {"员工姓名", "油品", "加油次数", "加油升数", "销售额"};
Row row2 = hssfSheet.createRow(5);
row2.setHeightInPoints(40);//设置行高
for (int i = 0; i < title.length; i++) {
CellRangeAddress cellRangeAddress6 = new CellRangeAddress(5, 5, 2 * i + 1, 2 * (i + 1));
hssfSheet.addMergedRegion(cellRangeAddress6);
//表头 第6行
//从第二列开始
for (int y = 2 * i + 1; y < 2 * (i + 1) + 1; y++) {
Cell cell5 = row2.createCell(y);
cell5.setCellValue(title[i]);
HSSFCellStyle style5 = excel.createCellStyle();
HSSFFont font2 = excel.createFont();
font2.setBold(true);
setBorder(style5, font2, 18);
cell5.setCellStyle(style5);
}
}
int weight = 0; //上一行的高度
//填充XMSL数据
for (int i = 0; i < nozzleAuthExports.size(); i++) { // 员工数
int high = nozzleAuthExports.get(i).getInfos().size(); //获取新增高度
if (i != 0) {
weight += nozzleAuthExports.get(i - 1).getInfos().size() + 1; //从第二行算起
}
int rowHigh = 0; //姓名初始单元格初始化高度
Row row3;
Cell cell6;
for (int y = 0; y < high + 1; y++) { //油品数 + 小计
rowHigh = 6 + y + weight; //动态定位行
row3 = hssfSheet.createRow(rowHigh); //创建行
for (int x = 1; x < 3; x++) { //必须要每个cell都要创建
//创建姓名
cell6 = row3.createCell(x);
cell6.setCellValue(nozzleAuthExports.get(i).getUserName());
HSSFCellStyle style6 = excel.createCellStyle();
HSSFFont font3 = excel.createFont();
setBorder(style6, font3, 11);
cell6.setCellStyle(style6);
}
row3.setHeightInPoints(20);//设置行高
for (int z = 0; z < 4; z++) { //填充数据
//创建单元格
CellRangeAddress cellRangeAddress6 = new CellRangeAddress(rowHigh, rowHigh, 2 * z + 3, 2 * z + 4); //合并单元格，行-行。列-列
hssfSheet.addMergedRegion(cellRangeAddress6);
for (int m = 2 * z + 3; m < 2 * z + 5; m++) {
Cell cell5 = row3.createCell(m); //定义列
HSSFCellStyle style5 = excel.createCellStyle();
HSSFFont font2 = excel.createFont();
if (y == nozzleAuthExports.get(i).getInfos().size()) { //小计
switch (z) {
case 0:
cell5.setCellValue("小计");
break;
case 1:
cell5.setCellValue(nozzleAuthExports.get(i).getAllOilCount());
break;
case 2:
cell5.setCellValue(nozzleAuthExports.get(i).getAllVolume().toString());
break;
case 3:
cell5.setCellValue(nozzleAuthExports.get(i).getAllSale().toString());
break;
}
font2.setBold(true);
} else {
switch (z) {
case 0:
cell5.setCellValue(nozzleAuthExports.get(i).getInfos().get(y).getFlueName());
break;
case 1:
cell5.setCellValue(nozzleAuthExports.get(i).getInfos().get(y).getOilCount());
break;
case 2:
cell5.setCellValue(nozzleAuthExports.get(i).getInfos().get(y).getVolume().toString());
break;
case 3:
cell5.setCellValue(nozzleAuthExports.get(i).getInfos().get(y).getSales().toString());
break;
}
font2.setBold(false);
}
setBorder(style5, font2, 11);
cell5.setCellStyle(style5);
}
}
}
//合并姓名单元格
CellRangeAddress cellRangeAddress7 = new CellRangeAddress(6 + weight, rowHigh, 1, 2);
hssfSheet.addMergedRegion(cellRangeAddress7);
}
try {
excel.write(os);
os.flush();
os.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void setBorder(HSSFCellStyle style, HSSFFont font, int fontSize) {
font.setFontHeightInPoints((short) fontSize);
style.setFont(font);
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平
style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
style.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
style.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
}
public static void _setBorder(HSSFCellStyle style, HSSFFont font, int fontSize, boolean bold, short alignment) {
font.setFontHeightInPoints((short) fontSize);
font.setBold(bold);
style.setFont(font);
style.setAlignment(alignment);
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直
}
}
直接上代码。效果图：
主要的代码就是
CellRangeAddress cellRangeAddress7 = new CellRangeAddress(6 + weight, rowHigh, 1, 2);
hssfSheet.addMergedRegion(cellRangeAddress7);其余的代码都是按需求生成表格。对于合并单元格后的边框问题。需要把合并的单元个全部创建出来。我没有找到更好的方法，其他人的说的不清不楚。
for (int x = 1; x < 3; x++) { //必须要每个cell都要创建
//创建姓名
cell6 = row3.createCell(x);
cell6.setCellValue(nozzleAuthExports.get(i).getUserName());
HSSFCellStyle style6 = excel.createCellStyle();
HSSFFont font3 = excel.createFont();
setBorder(style6, font3, 11);
cell6.setCellStyle(style6);
}3.提供下载功能
javaWeb的下载 直接上代码
HttpServletResponse response = getHttpServletResponse();
String startTime = nozzleAuthInfo.getStartTime() == null ? "不限" : DateUtil.formatDateToString(nozzleAuthInfo.getStartTime());
String endTime = nozzleAuthInfo.getEndTime() == null ? "不限" : DateUtil.formatDateToString(nozzleAuthInfo.getEndTime());
try {
response.setContentType(MediaType.APPLICATION_OCTET_STREAM.toString());
response.setCharacterEncoding("UTF-8");
response.setHeader("Content-Disposition", "attachment; filename=" + new String("员工考核".getBytes("gbk"), "iso-8859-1") + new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + ".xlsx");
response.setContentType("application/octet-stream");
OutputStream os = new BufferedOutputStream(response.getOutputStream());
AttendanceXLSXUtil.createXLSX(nozzleAuthExports, startTime, endTime,os);
} catch (IOException e) {
e.printStackTrace();
}