SpringBoot实现excel文件生成和下载
作者：互联网
使用SpringBoot实现excel生成和下载，生成模板如下
controller
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@RequestMapping(value = { "/downloadExcelTemplate" }, method = RequestMethod.GET)
public String downloadExcelTemplate(HttpSession httpSession, HttpServletResponse response) {
try {
dealExcelService.downloadExcelTemplate(response);
return "success";
} catch (Exception e) {
logger.error("downloadExcelTemplate_error", e);
return "failure";
}
}
service
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public void downloadExcelTemplate(HttpServletResponse response) throws Exception {
//文件名
SimpleDateFormat format3 = new SimpleDateFormat("yyyyMMddHHmm");
String fileName = new String(("文件名" + format3.format(new Date()) + "导入模板").getBytes(), "ISO8859_1");
//配置请求头
ServletOutputStream outputStream = response.getOutputStream();
// 组装附件名称和格式
response.setHeader("Content-disposition", "attachment; filename=" + fileName + ".xlsx");
// 创建一个workbook 对应一个excel应用文件
XSSFWorkbook workBook = new XSSFWorkbook();
// 在workbook中添加一个sheet,对应Excel文件中的sheet
XSSFSheet sheet = workBook.createSheet("模板");
ExportUtil exportUtil = new ExportUtil(workBook, sheet);
XSSFCellStyle headStyle = exportUtil.getHeadStyle();
XSSFCellStyle bodyStyle = exportUtil.getBodyStyle2();
// 构建表头
XSSFRow headRow = ExportUtil.createRow(sheet, 0);
XSSFCell cell;
String[] titles = {"表头一", "表头二", "表头三"};
int index = 0;
for (String title : titles) {
cell = ExportUtil.createCell(headRow, index);
cell.setCellStyle(headStyle);
cell.setCellValue(title);
index++;
}
try {
workBook.write(outputStream);
outputStream.flush();
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
outputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
ExportUtil导出工具类
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package com.shengsheng.utils;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.*;
/**
* excel 表格导出工具类
*
* @author shengshenglalala
*/
public class ExportUtil {
private XSSFWorkbook wb;
private XSSFSheet sheet;
/**
* @param wb
* @param sheet
*/
public ExportUtil(XSSFWorkbook wb, XSSFSheet sheet) {
this.wb = wb;
this.sheet = sheet;
}
/**
* 合并单元格后给合并后的单元格加边框
*
* @param region
* @param cs
*/
public void setRegionStyle(CellRangeAddress region, XSSFCellStyle cs) {
int toprowNum = region.getFirstRow();
for (int i = toprowNum; i <= region.getLastRow(); i++) {
XSSFRow row = sheet.getRow(i);
for (int j = region.getFirstColumn(); j <= region.getLastColumn(); j++) {
XSSFCell cell = row.getCell(j);
cell.setCellStyle(cs);
}
}
}
/**
* 设置表头的单元格样式
*
* @return
*/
public XSSFCellStyle getHeadStyle() {
// 创建单元格样式
XSSFCellStyle cellStyle = wb.createCellStyle();
// // 设置单元格的背景颜色为淡蓝色
cellStyle.setFillForegroundColor(HSSFColor.PALE_BLUE.index);
cellStyle.setFillPattern(XSSFCellStyle.SOLID_FOREGROUND);
// 设置单元格居中对齐
cellStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER);
// 设置单元格垂直居中对齐
cellStyle.setVerticalAlignment(XSSFCellStyle.VERTICAL_CENTER);
// 创建单元格内容显示不下时自动换行
// cellStyle.setWrapText(true);
// 设置单元格字体样式
XSSFFont font = wb.createFont();
// 设置字体加粗
font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("宋体");
// font.setFontHeight((short) 200);
cellStyle.setFont(font);
// 设置单元格边框为细线条
// cellStyle.setBorderLeft(XSSFCellStyle.BORDER_THIN);
// cellStyle.setBorderBottom(XSSFCellStyle.BORDER_THIN);
// cellStyle.setBorderRight(XSSFCellStyle.BORDER_THIN);
// cellStyle.setBorderTop(XSSFCellStyle.BORDER_THIN);
return cellStyle;
}
/**
* 设置表体的单元格样式
*
* @return
*/
public XSSFCellStyle getBodyStyle2() {
// 创建单元格样式
// 创建单元格样式
XSSFCellStyle cellStyle = wb.createCellStyle();
// 创建单元格内容显示不下时自动换行
// cellStyle.setWrapText(true);
// 设置单元格字体样式
XSSFFont font = wb.createFont();
// 设置字体加粗
// font.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("宋体");
font.setFontHeight((short) 200);
font.setColor(HSSFColor.BLACK.index);
cellStyle.setFont(font);
// 设置单元格边框为细线条
return cellStyle;
}
/**
* 没有行，就创建行
*
* @param sheet
* @param index
* @return
*/
public static XSSFRow createRow(XSSFSheet sheet, Integer index) {
XSSFRow row = sheet.getRow(index);
if (row == null) {
return sheet.createRow(index);
}
return row;
}
/**
* 如果没有列，就创建列
*
* @param row
* @param index
* @return
*/
public static XSSFCell createCell(XSSFRow row, Integer index) {
XSSFCell cell = row.getCell(index);
if (cell == null) {
return row.createCell(index);
}
return cell;
}
}
以上就是本文的全部内容
标签：index,cellStyle,sheet,SpringBoot,XSSFCellStyle,单元格,excel,return,下载 来源： https://blog.csdn.net/weixin_55025557/article/details/113779424