Java利用Easyexcel导出excel表格的示例代码
作者:羁客%
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1.导入 EasyExcel Maven包
<!--easyexcel 导出excel依赖--> <dependency> <groupId>com.alibaba</groupId> <artifactId>easyexcel</artifactId> <version>2.2.7</version> </dependency>
2.配置
配置表格表头样式,以及内容的写入方式
import com.alibaba.excel.write.handler.SheetWriteHandler; import com.alibaba.excel.write.metadata.holder.WriteSheetHolder; import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder; import org.apache.poi.ss.usermodel.*; import java.util.List; public class EasyExcelWriteHandler implements SheetWriteHandler { /** * 表头数据 */ private final List<String> headsDatas; /** * 内容数据 */ private final List<List<String>> bodyDatas; /** * 表头样式 */ private CellStyle cellStyle; /** * 内容样式 */ private CellStyle cellStyleHeader; public EasyExcelWriteHandler(List<String> headsDatas, List<List<String>> bodyDatas) { this.headsDatas = headsDatas; this.bodyDatas = bodyDatas; } @Override public void beforeSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) { } @Override public void afterSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) { Workbook workbook = writeWorkbookHolder.getWorkbook(); Sheet sheet = workbook.getSheetAt(0); // 表头样式 if (cellStyleHeader == null) { cellStyleHeader = workbook.createCellStyle(); cellStyleHeader.setAlignment(HorizontalAlignment.CENTER); cellStyleHeader.setVerticalAlignment(VerticalAlignment.CENTER); cellStyleHeader.setFillForegroundColor(IndexedColors.WHITE.getIndex()); Font font = workbook.createFont(); // 字体大小 font.setFontHeightInPoints((short) 16); // 字体 font.setFontName("微软雅黑"); //加粗 font.setBold(true); cellStyleHeader.setFont(font); } // 内容样式 if (cellStyle == null) { cellStyle = workbook.createCellStyle(); cellStyle.setAlignment(HorizontalAlignment.CENTER); cellStyle.setVerticalAlignment(VerticalAlignment.CENTER); cellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex()); Font font = workbook.createFont(); font.setFontName("微软雅黑"); font.setFontHeightInPoints((short) 12); cellStyle.setFont(font); } //表头内容 Row row = sheet.getRow(0); if (row == null) { row = sheet.createRow(0); } //遍历写入表头 for (int rowInt = 0; rowInt < headsDatas.size(); rowInt++) { //获取列内容 String cellValue = headsDatas.get(rowInt); //根据表头内容设置表头列宽(自适应表头宽度) sheet.setColumnWidth(rowInt, cellValue.length() * 875); Cell cell = row.getCell(rowInt); if (cell == null) { cell = row.createCell(rowInt); } cell.setCellStyle(cellStyleHeader); cell.setCellValue(cellValue); //遍历写入内容 if (rowInt < bodyDatas.size()) { for (int bodyRowInt = 0; bodyRowInt < bodyDatas.get(rowInt).size(); bodyRowInt++) { Row row0 = sheet.getRow(bodyRowInt + 1); if (row0 == null) { row0 = sheet.createRow(bodyRowInt + 1); } Cell cell0 = row0.getCell(rowInt); if (cell0 == null) { cell0 = row0.createCell(rowInt); } cell0.setCellStyle(cellStyle); cell0.setCellValue(bodyDatas.get(rowInt).get(bodyRowInt)); } } } } }
3.输出Excel到前端
public static void easyUtil1(ExcelBody excelBody) throws IOException { //转换内容数据 List<List<String>> list2 = new ArrayList<>(); for (List<Object> objects : excelBody.getBodyDatas()) { List<String> strs = new ArrayList<>(); for (Object object : objects) { strs.add(String.valueOf(object)); } list2.add(strs); } //设置表名 String simpleDateFormat = new String((new SimpleDateFormat("yyyyMMddHHmmss").format(new Date())).getBytes(), "UTF-8"); //设置字符编码 response.setCharacterEncoding("utf-8"); //设置内容类型 response.setContentType("application/vnd.ms-excel"); //设置标题 response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(excelBody.getFileName() + simpleDateFormat + ".xlsx", "utf-8")); //核心代码 //方式一: //EasyExcel.write(response.getOutputStream()).head(list2).sheet("sheet1").doWrite(list2); //方式二: ExcelWriterBuilder writerBuilder = EasyExcel.write(response.getOutputStream()); writerBuilder.registerWriteHandler(new EasyExcelWriteHandler(excelBody.getHeads(), list2)); ExcelWriter excelWriter = writerBuilder.build(); ExcelWriterSheetBuilder writerSheetBuilder = EasyExcel.writerSheet("Sheet1"); excelWriter.write(new ArrayList<>(), writerSheetBuilder.build()); excelWriter.finish(); } @Data public class ExcelBody { /** * 文件名 */ private String fileName; /** * 表头 */ private List<String> heads; /** * 数据体 */ private List<List<Object>> bodyDatas; }
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