本文主要是介绍【工具类】Excel导出那些事儿（三），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
导出Excel又有了新的需求，之前都是直接导出list<T>，现需要导出List<map>，并且需要动态创建表头。如下：
【工具类】
引用jxl包
public class ListMapExportExcelUtil {/*** 写excel.** @param fileName 文件名* @param sheetName sheet名* @param mapKeyListString map的key，表头们* @param dataListMap 数据*/public static void writeExcel(HttpServletResponse response,String fileName,String sheetName,List<String> mapKeyListString, List<Map<String, Object>> dataListMap) throws EngineException {WritableWorkbook wwb = null;OutputStream os = null;try {os = response.getOutputStream();wwb = Workbook.createWorkbook(os);WritableSheet ws = wwb.createSheet(sheetName, 0);int size = mapKeyListString.size();insertHead(ws, mapKeyListString);int rownum = 1;if ((dataListMap != null) && (dataListMap.size() > 0)) {for (int i = 0; i < dataListMap.size(); i++) {LogUtil.getAppLogger().info("当前行数为：{}",i);Map map = (Map) dataListMap.get(i);for (int j = 0; j < mapKeyListString.size(); j++) {if(map.get(mapKeyListString.get(j)) != null ){insertCell(ws, null, rownum, j, map.get(mapKeyListString.get(j)).toString());}else{insertCell(ws, null, rownum, j, " ");}}rownum++;}}SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");response.setContentType("application/msexcel");response.addHeader("Content-disposition", "attachment;" +"filename=" + fileName + "_" + sdf.format(new Date()) + ".xls");wwb.write();} catch (Exception e) {throw new Exception(e);} finally {try {if (wwb != null)wwb.close();if (os != null)os.close();} catch (Exception e) {throw new Exception(e);}}}//单元格private static void insertCell(WritableSheet writableSheet, WritableCellFormat writableCellFormat, int row, int column, String name) throws RowsExceededException, WriteException {WritableCell cell = new Label(column, row, name);if (writableCellFormat != null) {cell.setCellFormat(writableCellFormat);}writableSheet.addCell(cell);}//表头private static void insertHead(WritableSheet writableSheet, List<String> titleColumn) throws RowsExceededException, WriteException, EngineException {WritableFont writableFont = new WritableFont(WritableFont.TIMES, 12, WritableFont.BOLD);WritableCellFormat writableCellFormat = new WritableCellFormat(writableFont);try {writableCellFormat.setAlignment(Alignment.CENTRE);} catch (WriteException e) {throw new EngineException(CodeEnum.PARAM_FORMAT_ERROR.getCode(),CodeEnum.PARAM_FORMAT_ERROR.getMessage(),e);}for (int i = 0; i < titleColumn.size(); i++) {WritableCell cell = new Label(i, 0, titleColumn.get(i));cell.setCellFormat(writableCellFormat);writableSheet.addCell(cell);}}
}
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