JXLS (Excel 导出工具使用)

JXLS (Excel导入、导出工具使用)

jxls是一个简单的、轻量级的excel导出库，使用特定的标记在excel模板文件中来定义输出格式和布局。java中成熟的excel导出工具备pol、jxl，但他们都是使用java代码的方式来导出excel，编码效率很低且不方便维护。maven

还可使用一些工具很轻松的实现模板导出。这些工具如今还在维护，并且作得比较好的国内的有easyPOI，国外的就是这个JXLS了。

比较：

项目中有不少复杂的报表（大量单元格合并和单元格样式），easyPOI处理合并单元格时候容易出现残损的状况，poi代码维护成本高。

效果图

根据模板样式进行填充数据

依赖包

<dependency><groupId>org.jxls</groupId><artifactId>jxls</artifactId><version>2.4.6</version>
</dependency>
<dependency><groupId>org.jxls</groupId><artifactId>jxls-poi</artifactId><version>1.0.15</version>
</dependency>
<dependency><groupId>org.jxls</groupId><artifactId>jxls-jexcel</artifactId><version>1.0.7</version>
</dependency>
<dependency><groupId>net.sf.jxls</groupId><artifactId>jxls-core</artifactId><version>1.0.5</version>
</dependency>

工具类

import org.apache.commons.collections4.*;
import org.jxls.builder.xls.*;
import org.jxls.common.*;
import org.jxls.transform.Transformer;
import org.jxls.transform.jexcel.*;
import org.jxls.util.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLEncoder;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;
import java.util.Map;
import java.util.Objects;/*** @Author: qinqc* @Date: 2019/9/30 11:25* @Desc: Jxls excel*/
public class JxlsUtil {private static Logger log = LoggerFactory.getLogger(JxlsUtil.class);private static final String CONTENT_TYPE = "application/vnd.ms-excel";static {XlsCommentAreaBuilder.addCommandMapping("merge", MergeCommand.class);}/*** 导出Excel** @param templatePath   模板路径* @param exportFile* Name 导出的文件名* @param data           数据集合* @param response* @throws IOException*/public static void exportExcel(String templatePath, String exportFileName, Map<String, Object> data, HttpServletResponse response) {try {exportFileName = URLEncoder.encode(exportFileName, "UTF-8");response.setContentType(CONTENT_TYPE);response.setHeader("Content-Disposition", "attachment;filename*=utf-8'zh_cn'" + exportFileName + ".xls");response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");Context context = new Context(data);ServletOutputStream os = response.getOutputStream();InputStream is = new FileInputStream(templatePath);JxlsHelper.getInstance().processTemplate(is, os, context);is.close();} catch (Exception e) {log.error("excel导出异常", e);}}/*** 导出Excel** @param sheetNameList   需要删除的sheet* @param templatePath   模板路径* @param exportFileName 导出的文件名* @param data           数据集合* @param response* @throws IOException*/public static void exportExcel(List<String> sheetNameList, String templatePath, String exportFileName, Map<String, Object> data, HttpServletResponse response) {try {exportFileName = URLEncoder.encode(exportFileName, "UTF-8");response.setContentType(CONTENT_TYPE);response.setHeader("Content-Disposition", "attachment;filename*=utf-8'zh_cn'" + exportFileName + ".xls");response.setHeader("Access-Control-Expose-Headers", "Content-Disposition");Context context = new Context(data);ServletOutputStream os = response.getOutputStream();InputStream is = new FileInputStream(templatePath);JxlsHelper jxlsHelper = JxlsHelper.getInstance();Transformer transformer = jxlsHelper.createTransformer(is, os);if (CollectionUtils.isNotEmpty(sheetNameList)){sheetNameList.forEach(transformer::deleteSheet);}
//            jxlsHelper.processTemplate(is, os, context);jxlsHelper.setUseFastFormulaProcessor(false).processTemplate(context, transformer);is.close();} catch (Exception e) {log.error("excel导出异常", e);}}/*** 导出Excel** @param templatePath 模板路径* @param data         数据集合* @throws IOException*/public static InputStream exportExcel(String templatePath, Map<String, Object> data) {InputStream excelStream = null;try {ByteArrayOutputStream os = new ByteArrayOutputStream();JexcelContext context = new JexcelContext(data);InputStream is = new FileInputStream(templatePath);JxlsHelper.getInstance().processTemplate(is, os, context);is.close();excelStream = new ByteArrayInputStream(os.toByteArray());os.close();} catch (Exception e) {log.error("excel导出异常", e);}return excelStream;}public static void closedInputStream(InputStream inputStream) {try {if (Objects.nonNull(inputStream)) {inputStream.close();}} catch (IOException e) {e.printStackTrace();log.error("关闭流管道异常");}}public static void closedOutputStream(OutputStream outputStream) {try {if (Objects.nonNull(outputStream)) {outputStream.close();}} catch (IOException e) {e.printStackTrace();log.error("关闭流管道异常");}}/*** 将InputStream写入本地文件* @param destination 写入本地目录* @param input    输入流* @throws IOException*/private static void writeToLocal(String destination, InputStream input)throws IOException {int index;byte[] bytes = new byte[1024];FileOutputStream downloadFile = new FileOutputStream(destination);while ((index = input.read(bytes)) != -1) {downloadFile.write(bytes, 0, index);downloadFile.flush();}downloadFile.close();input.close();}
}

合并单元格所需要的类

import jxl.write.WriteException;
import lombok.Data;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.math.NumberUtils;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.jxls.area.Area;
import org.jxls.command.AbstractCommand;
import org.jxls.command.Command;
import org.jxls.common.CellRef;
import org.jxls.common.Context;
import org.jxls.common.Size;
import org.jxls.transform.Transformer;
import org.jxls.transform.jexcel.JexcelTransformer;
import org.jxls.transform.poi.PoiTransformer;/*** @Date: 2020/10/28 0020 15:04* 合并单元格命令*/
@Data
public class MergeCommand extends AbstractCommand {/*** 合并的列数*/private String cols;/*** 合并的行数*/private String rows;private Area area;/*** 单元格的样式*/private CellStyle cellStyle;@Overridepublic String getName() {return "merge";}@Overridepublic Command addArea(Area area) {if (super.getAreaList().size() >= 1) {throw new IllegalArgumentException("You can add only a single area to 'merge' command");}this.area = area;return super.addArea(area);}@Overridepublic Size applyAt(CellRef cellRef, Context context) {int rows = 1, cols = 1;if (StringUtils.isNotBlank(this.rows)) {Object rowsObj = getTransformationConfig().getExpressionEvaluator().evaluate(this.rows, context.toMap());if (rowsObj != null && NumberUtils.isDigits(rowsObj.toString())) {rows = NumberUtils.toInt(rowsObj.toString());}}if (StringUtils.isNotBlank(this.cols)) {Object colsObj = getTransformationConfig().getExpressionEvaluator().evaluate(this.cols, context.toMap());if (colsObj != null && NumberUtils.isDigits(colsObj.toString())) {cols = NumberUtils.toInt(colsObj.toString());}}if (rows > 1 || cols > 1) {Transformer transformer = this.getTransformer();if (transformer instanceof PoiTransformer) {return poiMerge(cellRef, context, (PoiTransformer) transformer, rows, cols);} else if (transformer instanceof JexcelTransformer) {return jexcelMerge(cellRef, context, (JexcelTransformer) transformer, rows, cols);}}area.applyAt(cellRef, context);return new Size(1, 1);}protected Size poiMerge(CellRef cellRef, Context context, PoiTransformer transformer, int rows, int cols) {Sheet sheet = transformer.getWorkbook().getSheet(cellRef.getSheetName());CellRangeAddress region = new CellRangeAddress(cellRef.getRow(),cellRef.getRow() + rows - 1,cellRef.getCol(),cellRef.getCol() + cols - 1);sheet.addMergedRegion(region);area.applyAt(cellRef, context);setRegionStyle(cellStyle, region, sheet);return new Size(cols, rows);}protected Size jexcelMerge(CellRef cellRef, Context context, JexcelTransformer transformer, int rows, int cols) {try {transformer.getWritableWorkbook().getSheet(cellRef.getSheetName()).mergeCells(cellRef.getRow(),cellRef.getCol(),cellRef.getRow() + rows - 1,cellRef.getCol() + cols - 1);area.applyAt(cellRef, context);} catch (WriteException e) {throw new IllegalArgumentException("合并单元格失败");}return new Size(cols, rows);}public static void setRegionStyle(CellStyle cs, CellRangeAddress region, Sheet sheet) {for (int i = region.getFirstRow(); i <= region.getLastRow(); i++) {Row row = sheet.getRow(i);if (row == null) {row = sheet.createRow(i);}for (int j = region.getFirstColumn(); j <= region.getLastColumn(); j++) {Cell cell = row.getCell(j);if (cell == null) {cell = row.createCell(j);}if (cs == null) {setPoiCellStyle(cell);}}}}/*** 设置单元格格式* 根据自己需求修改** @param cell* @return*/private static void setPoiCellStyle(Cell cell) {CellStyle cellStyle = cell.getCellStyle();if (cellStyle != null) {cellStyle.setBorderRight(BorderStyle.THIN);cellStyle.setBorderRight(BorderStyle.THIN);cellStyle.setBorderBottom(BorderStyle.THIN);}}}

参考接口

@GetMapping("/excel-maternal-health-management-ones")@PreAuthorize("hasAnyRole(\"" + AuthoritiesConstants.ADMIN + "\",\""+AuthoritiesConstants.ALL_MATERNALHEALTHMANAGEMENTONE + "\",\""+AuthoritiesConstants.SELECT_MATERNALHEALTHMANAGEMENTONE+"\")")public void excelMaternalHealthManagementOnes(MaternalHealthManagementOneCriteria criteria, HttpServletResponse response, Pageable pageable) throws Exception {/*  String fileName = "xxx";String url = maternalHealthManagementOneService.excelMaternalHealthManagementOne(criteria);EasyPoiUtil.fileStream(fileName,url,response);*/String fileName ="54641";Map<String, Object> data = maternalHealthManagementOneService.getMaternalHealthManagementOneMap(criteria);String property = System.getProperty("user.dir");String templateFileName = property + "/wordtemplate/maternalHealthManagementOne/maternalHealthManagementOne.xlsx";JxlsUtil.exportExcel(templateFileName,fileName,data,response);//完成导出

注意点1

注释中的遍历表达式“data”需与map中的key一致且key对应的值应为List<>类型

注意点2

lastCell=‘’‘P5’‘需一致（与注解点1中的lastCell），一个前注释，一个后注释“P5”代表的是需要执行遍历的区域

Excel注释语法

jx：merge（
lastCell =“合并单元格范围”
[，cols =“合并的列数”]
[，rows =“合并的行数”]
[，minCols =“要合并的最小列数”]
[，minRows = “要合并的最小行数”]
）

附链接

https://www.shangmayuan.com/a/d98c48f2194d425481057984.html

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