try {            response.setCharacterEncoding("UTF-8");            response.setHeader("Content-disposition", "attachment;filename="                    + URLEncoder.encode("文件名", "UTF-8") + ".xls");            JRDataSource ds = new JRBeanCollectionDataSource(list);            List<ColumnBuilder> columnList = new ArrayList<ColumnBuilder>();            columnList.add(Columns                    .column("任务单号", "TASKNUM", DataTypes.stringType())                    .setHorizontalAlignment(HorizontalAlignment.CENTER)                    .setWidth(150));            columnList.add(Columns.column("任务标题", "TASKTITLE",                    DataTypes.stringType()).setWidth(250));            columnList.add(Columns.column("任务内容", "TASKCONTENT",                    DataTypes.stringType()).setWidth(250));            columnList.add(Columns.column("检查企业", "OBJECTNAME",                    DataTypes.stringType()).setWidth(250));            columnList.add(Columns.column("任务类型", "TASKTYPE",                    DataTypes.stringType()));            columnList.add(Columns.column("任务来源", "TASKSOURCENAME",                    DataTypes.stringType()));            columnList.add(Columns.column("开始时间", "STARTTIME",                    DataTypes.stringType()).setWidth(120));            columnList.add(Columns.column("截止时间", "ENDTIME",                    DataTypes.stringType()).setWidth(120));            columnList.add(Columns.column("紧急程度", "URGENCYNAME",                    DataTypes.stringType()));            columnList.add(Columns.column("发起人", "CREATERNAME",                    DataTypes.stringType()));            columnList.add(Columns.column("任务状态", "TASKSTATUS",                    DataTypes.stringType()));            DynamicreportsReport.toXlsReport(columnList, ds,                    response.getOutputStream());        } catch (Exception e) {            e.printStackTrace();        }

import static net.sf.dynamicreports.report.builder.DynamicReports.export;import static net.sf.dynamicreports.report.builder.DynamicReports.report;import java.io.OutputStream;import java.util.List;import net.sf.dynamicreports.jasper.builder.JasperReportBuilder;import net.sf.dynamicreports.jasper.builder.export.JasperXlsExporterBuilder;import net.sf.dynamicreports.jasper.constant.JasperProperty;import net.sf.dynamicreports.report.builder.column.ColumnBuilder;import net.sf.jasperreports.engine.JRDataSource;public class DynamicreportsReport {    public static void toXlsReport(List<ColumnBuilder> columnList,            JRDataSource dataSource, OutputStream out) throws Exception {        try {            JasperXlsExporterBuilder xlsExporter = export.xlsExporter(out)                    .setDetectCellType(true).setIgnorePageMargins(true)                    .setWhitePageBackground(false)                    .setRemoveEmptySpaceBetweenColumns(true);            JasperReportBuilder exporterBuilder = report()                    .addProperty(JasperProperty.EXPORT_XLS_FREEZE_ROW, "2")                    .ignorePageWidth().ignorePagination();            for (ColumnBuilder textColumnBuilder : columnList) {                exporterBuilder = exporterBuilder.columns(textColumnBuilder);            }            exporterBuilder.setDataSource(dataSource).toXls(xlsExporter);            // out.flush();        } catch (Exception e) {            e.printStackTrace();        }    }}