A .pom file imports jar
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-base</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-web</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-annotation</artifactId>
<version>3.2.0</version>
</dependency>2. Create tool class
public class ExcelUtils {
/**
* excel 导出
*
* @param list 要导出的数据
* @param pojoClass pojo类型
* @param fileName 文件名称
* @param exportParams 导出表格参数
* @param response
*/
public static void exportExcel(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams,
HttpServletResponse response) throws IOException {
Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
downLoadExcel(fileName, response, workbook);
}
public static void exportExcel(ExportParams exportParams, List<ExcelExportEntity> colList, List<?> list,HttpServletResponse response)
throws IOException {
Workbook workbook = ExcelExportUtil.exportExcel(exportParams, colList, list);
downLoadExcel(exportParams.getSheetName(), response, workbook);
}
/**
* 下载文件
*
* @param fileName 文件名称
* @param response
* @param workbook excel数据
*/
private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook)
throws IOException {
try {
response.setHeader("Access-Control-Allow-Origin","*");
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition",
"attachment;filename=" + URLEncoder.encode(fileName + ".xls", "UTF-8"));
OutputStream output=response.getOutputStream();
workbook.write(output);
output.flush();
workbook.close();
output.close();
} catch (Exception e) {
throw new IOException(e.getMessage());
}
}
}
3. Create entity class
public class ElePfvEnergyDTO implements Serializable{
private static final long serialVersionUID = 1L;
@Excel(name = "工序名称", width = 20)
private String name;
@Excel(name = "电量", groupName = "尖", width = 20, orderNum = "0")
private Double top;
@Excel(name = "电费", groupName = "尖", width = 20, orderNum = "1")
private Double topCost;
@Excel(name = "电量", groupName = "高", width = 20, orderNum = "0")
private Double high;
@Excel(name = "电费", groupName = "高", width = 20, orderNum = "1")
private Double highCost;
@Excel(name = "电量", groupName = "平", width = 20, orderNum = "0")
private Double flat;
@Excel(name = "电费", groupName = "平", width = 20, orderNum = "1")
private Double flatCost;
@Excel(name = "电量", groupName = "谷", width = 20, orderNum = "0")
private Double valley;
@Excel(name = "电费", groupName = "谷", width = 20, orderNum = "1")
private Double valleyCost;
@Excel(name = "电量", groupName = "总计", width = 20, orderNum = "0")
private Double allEle;
@Excel(name = "电费", groupName = "总计", width = 20, orderNum = "1")
private Double allCost;
}
4. In the ExportParams class, find the ExcelExportStylerDefaultImpl class, copy the content and generate a new class (used to set the excel header background, font, position, etc.)
/**
* 样式的默认实现
* @author JueYue
* 2015年1月9日 下午5:36:08
*/
public class ExcelExportStylerImpl extends AbstractExcelExportStyler
implements IExcelExportStyler {
public ExcelExportStylerImpl(Workbook workbook) {
super.createStyles(workbook);
}
@Override
public CellStyle getTitleStyle(short color) {
CellStyle titleStyle = workbook.createCellStyle();
Font font = this.workbook.createFont();
font.setBold(true);
titleStyle.setFont(font);
titleStyle.setAlignment(HorizontalAlignment.CENTER);
titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);
titleStyle.setWrapText(true);
titleStyle.setBorderRight(BorderStyle.THIN);
titleStyle.setBorderTop(BorderStyle.THIN);
titleStyle.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
titleStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
return titleStyle;
}
@Override
public CellStyle stringSeptailStyle(Workbook workbook, boolean isWarp) {
CellStyle style = workbook.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
style.setDataFormat(STRING_FORMAT);
if (isWarp) {
style.setWrapText(true);
}
return style;
}
@Override
public CellStyle getHeaderStyle(short color) {
CellStyle titleStyle = workbook.createCellStyle();
Font font = workbook.createFont();
font.setFontHeightInPoints((short) 12);
titleStyle.setFont(font);
return titleStyle;
}
@Override
public CellStyle stringNoneStyle(Workbook workbook, boolean isWarp) {
CellStyle style = workbook.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
style.setDataFormat(STRING_FORMAT);
if (isWarp) {
style.setWrapText(true);
}
return style;
}
}
5. Controller layer call
@RequestMapping(value = "/exportPFYXls")
public void exportXls(HttpServletResponse response) {
List<ElePfvEnergyDTO> list = service.getAreaCodeList();
String fileName = "明细表";
String sheetName = "明细表";
ExportParams exportParams = new ExportParams();
exportParams.setSheetName(sheetName);
exportParams.setStyle(ExcelExportStylerImpl.class);
exportParams.setCreateHeadRows(true);
exportParams.setHeaderHeight(500D);
try {
ExcelUtils.exportExcel(list,ElePfvEnergyDTO.class,fileName,exportParams,response);
} catch (Exception e) {
e.printStackTrace();
}
}6. Display:
Seven: vertical cell merge
There are two attributes in the excel annotation NeedMerge: whether to merge; MergeVertical: vertical merge
@Excel(name = "电量", groupName = "尖", width = 20, orderNum = "0" ,mergeVertical = true, needMerge = true)8. Dynamic header:
1. Manual splicing header:
public List<ExcelExportEntity> getHeadList(EnParamsVo vo){
List<String> dateList = new ArrayList<String>();
for (int i = 0; i < vo.getSelCount(); i++) {
String thisDay = DateUtil.getSpecifiedDayBefore(vo.getSelDate(), i);
dateList.add(thisDay);
}
Collections.reverse(dateList);
List<ExcelExportEntity> colList = new ArrayList<ExcelExportEntity>();
//第一列
ExcelExportEntity colEntity1 = new ExcelExportEntity("名称", "name");
colEntity1.setNeedMerge(true);
colEntity1.setMergeVertical(true);
colList.add(colEntity1);
//第二列
ExcelExportEntity colEntity2 = new ExcelExportEntity("类别", "type");
colEntity2.setNeedMerge(true);
colList.add(colEntity2);
for(String localDate:dateList){
ExcelExportEntity dateColGroup = new ExcelExportEntity(localDate, localDate);
List<ExcelExportEntity> dateColList = new ArrayList<ExcelExportEntity>();
ExcelExportEntity tempExcelExportEntity = new ExcelExportEntity(DateUtil.getWeekOfDate(localDate), "dayOfWeek"+localDate);
dateColList.add(tempExcelExportEntity);
dateColGroup.setList(dateColList);
colList.add(dateColGroup);
}
return colList;
}2. Manual splicing value:
public List<Map<String, Object>> getExcelList(Map<String, Object> map, String name) {
List<String> dateList = (List<String>) map.get("xList");
List<String> outputList = (List<String>) map.get("outputList");
List<String> electricList = (List<String>) map.get("electricList");
List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
List<String> typeList = Arrays.asList("test1","test2","test3","test4","test5","test6");
for(int i=0;i < typeList.size();i++){
Map<String, Object> valMap = new HashMap<>();
valMap.put("name", name);
valMap.put("type",typeList.get(i));
for(int j=0;j < dateList.size();j++){
List<Map<String, Object>> dayOfWeekList = new ArrayList<Map<String, Object>>();
Map<String, Object> dayOfWeekMap = new HashMap<String, Object>();
if (i == 1) {
dayOfWeekMap.put("dayOfWeek"+ dateList.get(j), outputList.get(j));
}else if(i == 2) {
dayOfWeekMap.put("dayOfWeek"+ dateList.get(j), electricList.get(j));
}
else {
dayOfWeekMap.put("dayOfWeek"+ dateList.get(j), 0);
}
dayOfWeekList.add(dayOfWeekMap);
valMap.put(dateList.get(j), dayOfWeekList);
}
list.add(valMap);
}
return list;
}3. Export:
public void exportMCUOfDay(EnParamsVo vo, HttpServletResponse response){
List<ExcelExportEntity> colList = getHeadList(vo);
List<String> idList = eStruService.getNodeListByDeptIdAndLevel(vo.getSelCode(), "3");
List<Map<String, Object>> list = new ArrayList<Map<String,Object>>();
if (CollectionUtils.isEmpty(idList)) {
return;
}
idList.forEach(r->{
vo.setSelCode(r);
String name = eStruService.getOne(new QueryWrapper<EnergyStructure>().eq("id", r)).getName();
QueryWrapper<EnergyStructure> queryWrapper = new QueryWrapper<EnergyStructure>();
if (CollectionUtils.isNotEmpty(idList)) {
queryWrapper.eq("parent_id", r);
} else {
queryWrapper.eq("id", "");
}
queryWrapper.isNotNull("code");
List<String> centerNameList = eStruService.list(queryWrapper).stream().map(x ->x.getCode())
.collect(Collectors.toList());
if (CollectionUtils.isEmpty(centerNameList)) {
centerNameList = Arrays.asList("1");
}
Map<String, Object> map = queryMCUOfDay(vo, centerNameList);
list.addAll(getExcelList(map,name));
});
String sheetName = "用电明细";
ExportParams exportParams = new ExportParams();
exportParams.setSheetName(sheetName);
exportParams.setStyle(ExcelExportStylerImpl.class);
exportParams.setCreateHeadRows(true);
exportParams.setHeaderHeight(500D);
try {
ExcelUtils.exportExcel(exportParams, colList,list, response);
} catch (Exception e) {
e.printStackTrace();
}
}exhibit:
