1、效果如图

2、Controller

@GetMapping("/exportExcel")public void exportExcel(@RequestParam(value = "menu") String menu,

@RequestParam(value= "dwflglId") intdwflglId,

@RequestParam(value= "qjCode") String qjCode,

HttpServletResponse response)throwsIOException {//内容集合

List jthz =getJthz(dwflglId, qjCode);//表头集合

List header =getHeaderOfHz(dwflglId, qjCode);

response.setHeader("Content-Disposition", "attachment; filename=Zjlryshz.xlsx");//响应类型,编码

response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");

String bigTitle= "资金流入预算表";

EasyExcel.write(response.getOutputStream()).head(getExcelHeader(header, bigTitle)).registerWriteHandler(new Custemhandler()).sheet("资金流入预算导出模板").doWrite(getExportData(jthz));

}

通过getExcelHeader(header, bigTitle)得到表头集合

private List> getExcelHeader(Listheader, String bigTitle) {

List> head = new ArrayList<>();

List head0 = new ArrayList<>();

head0.add(bigTitle);

head0.add("资金项目");

head.add(head0);

head0= new ArrayList<>();

head0.add(bigTitle);

head0.add("行次");

head.add(head0);for(var h : header) {

head0= new ArrayList<>();

head0.add(bigTitle);

head0.add(h.getName());

head.add(head0);

}returnhead;

}

通过调用registerWriteHandler来设置表格样式，我这里设置只是设置表头的自适应宽度，创建一个类来继承AbstractColumnWidthStyleStrategy抽象类

packagecn.xxxx.xxxx.xxx.utils;importcom.alibaba.excel.metadata.CellData;importcom.alibaba.excel.metadata.Head;importcom.alibaba.excel.write.metadata.holder.WriteSheetHolder;importcom.alibaba.excel.write.style.column.AbstractColumnWidthStyleStrategy;importorg.apache.poi.ss.usermodel.Cell;importorg.slf4j.Logger;importorg.slf4j.LoggerFactory;importjava.util.List;public class Custemhandler extendsAbstractColumnWidthStyleStrategy {private static final int MAX_COLUMN_WIDTH = 255;//the maximum column width in Excel is 255 characters

publicCustemhandler() {

}

@Overrideprotected void setColumnWidth(WriteSheetHolder writeSheetHolder, ListcellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {if (isHead && cell.getRowIndex() != 0) {int columnWidth =cell.getStringCellValue().getBytes().length;if (columnWidth >MAX_COLUMN_WIDTH) {

columnWidth=MAX_COLUMN_WIDTH;

}else{

columnWidth= columnWidth + 3;

}

writeSheetHolder.getSheet().setColumnWidth(cell.getColumnIndex(), columnWidth* 256);

}

}private final static Logger logger = LoggerFactory.getLogger(Custemhandler.class);

}

最后在doWrite()里面放要导出的数据即可

private List> getExportData(Listjthz) {

List> sumList = new ArrayList<>();for(var row : jthz) {

List list = new ArrayList<>();

list.add(row.getZjxm());

list.add(String.valueOf(row.getZbY()));for(var xm : row.getZjlrysXms()) {if (xm.getId() == null) {

list.add("");

}else{if (xm.getZjlrysb().getXsValue() == null || xm.getZjlrysb().getXsValue().compareTo(new BigDecimal("0")) == 0) {

list.add("");

}else{

list.add(xm.getZjlrysb().getXsValue().toString());

}

}

}

sumList.add(list);

}returnsumList;

}

无论表头还是内容，传给easyexcel的都是List>这种形式的集合，可以说是二维的吧，外面的List相当于row，里面的List相当于col

参考链接：