Page button request
<button pButton type="button" label="Export" (click)="export()"
class="ui-button-rounded float-right ui-button-mt-30"></button>
JS method calling interface
export() {
console.log('download report with startDate:' + this.cond.startDate + ' endDate' + this.cond.endDate);
window.location.href = this.configJsonService.config.service_url + /export?startDate=${
this.cond.startDate}&endDate=${
this.cond.endDate}&token=${
this.appService.token}`;
}
Controller
@GetMapping("/export")
public void exportEmailZip( @RequestParam String startDate, @RequestParam String endDate,
HttpServletResponse response)
throws IOException {
String merchantName = "";
// 时间周期
String period = DateTimeUtils.getDateStr(DateTimeUtils.parseIsoDate(startDate)) + "-" + DateTimeUtils.getDateStr(
DateTimeUtils.parseIsoDate(endDate));
String fileName = "YaBand " + merchantName + "_" + period + ".xls";
// 这里 需要指定写用哪个class去写
response.setHeader("Content-disposition", "attachment;filename=" + fileName);
response.setContentType("application/vnd.ms-excel; charset=utf-8");
response.setCharacterEncoding("utf-8");
EasyExcel.write(response.getOutputStream(), AgentMerchantPeriodDto.class)
.registerWriteHandler(EasyExcelUtil.getStyleStrategy())
.sheet("订单信息")
.doWrite(data(startDate, endDate, merchantId));
}
private List<AgentMerchantPeriodDto> data(String startDate, String endDate, Integer merchantId) {
// 访问数据库拿到想要的数据并在Impl里面转换数据格式调整样式等等
return orderInitService.agentPeriodList(startDate, endDate, merchantId);
}
By the way:
Table style adjustment
public static HorizontalCellStyleStrategy getStyleStrategy(){
// 头的策略
WriteCellStyle headWriteCellStyle = new WriteCellStyle();
// 背景设置为灰色
headWriteCellStyle.setFillForegroundColor(IndexedColors.LIGHT_ORANGE.getIndex());
WriteFont headWriteFont = new WriteFont();
headWriteFont.setFontHeightInPoints((short)10);
// 字体样式
headWriteFont.setFontName("Frozen");
headWriteFont.setColor(IndexedColors.BLUE.getIndex());
headWriteCellStyle.setWriteFont(headWriteFont);
//自动换行
headWriteCellStyle.setWrapped(true);
// 水平对齐方式
headWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
// 垂直对齐方式
headWriteCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
// 内容的策略
WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
// 这里需要指定 FillPatternType 为FillPatternType.SOLID_FOREGROUND 不然无法显示背景颜色.头默认了 FillPatternType所以可以不指定
// contentWriteCellStyle.setFillPatternType(FillPatternType.SQUARES);
// 背景白色
contentWriteCellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
// 字体样式
WriteFont contentWriteFont = new WriteFont();
// 字体大小
contentWriteFont.setFontHeightInPoints((short)10);
// 字体样式
contentWriteFont.setFontName("Calibri");
contentWriteFont.setColor(IndexedColors.BLACK.getIndex());
contentWriteCellStyle.setWriteFont(contentWriteFont);
// 设置边框
contentWriteCellStyle.setBorderBottom(BorderStyle.THIN);
contentWriteCellStyle.setBorderTop(BorderStyle.THIN);
contentWriteCellStyle.setBorderLeft(BorderStyle.THIN);
contentWriteCellStyle.setBorderRight(BorderStyle.THIN);
// 这个策略是 头是头的样式 内容是内容的样式 其他的策略可以自己实现
return new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle);
}
Set column width adaptively
public class ExcelCellWidthStyleStrategy extends AbstractColumnWidthStyleStrategy {
private static final int MAX_COLUMN_WIDTH = 255;
private Map<Integer, Map<Integer, Integer>> CACHE = new HashMap(8);
@Override
protected void setColumnWidth(WriteSheetHolder writeSheetHolder, List<CellData> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
boolean needSetWidth = isHead || !CollectionUtils.isEmpty(cellDataList);
if (needSetWidth) {
Map<Integer, Integer> maxColumnWidthMap = (Map)CACHE.get(writeSheetHolder.getSheetNo());
if (maxColumnWidthMap == null) {
maxColumnWidthMap = new HashMap(16);
CACHE.put(writeSheetHolder.getSheetNo(), maxColumnWidthMap);
}
Integer columnWidth = this.dataLength(cellDataList, cell, isHead);
if (columnWidth >= 0) {
if (columnWidth > 255) {
columnWidth = 255;
}
Integer maxColumnWidth = (Integer)((Map)maxColumnWidthMap).get(cell.getColumnIndex());
if (maxColumnWidth == null || columnWidth > maxColumnWidth) {
((Map)maxColumnWidthMap).put(cell.getColumnIndex(), columnWidth);
writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), columnWidth * 256);
}
}
}
}
private Integer dataLength(List<CellData> cellDataList, Cell cell, Boolean isHead) {
if (isHead) {
return cell.getStringCellValue().getBytes().length;
} else {
CellData cellData = (CellData)cellDataList.get(0);
CellDataTypeEnum type = cellData.getType();
if (type == null) {
return -1;
} else {
switch(type) {
case STRING:
return cellData.getStringValue().getBytes().length;
case BOOLEAN:
return cellData.getBooleanValue().toString().getBytes().length;
case NUMBER:
return cellData.getNumberValue().toString().getBytes().length;
default:
return -1;
}
}
}
}
}
Friendship Link: Common Notes on EasyExcel Table Style Setting