- 导入jar包
<!--版本可以根据项目定-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>easyexcel</artifactId>
<version>2.2.6</version>
</dependency>
- 添加一个工具类
public class ExcelFillCellMergeStrategy implements CellWriteHandler {
private int[] mergeColumnIndex;
private int mergeRowIndex;
public ExcelFillCellMergeStrategy() {
}
public ExcelFillCellMergeStrategy(int mergeRowIndex, int[] mergeColumnIndex) {
this.mergeRowIndex = mergeRowIndex;
this.mergeColumnIndex = mergeColumnIndex;
}
@Override
public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row, Head head, Integer columnIndex, Integer relativeRowIndex, Boolean isHead) {
}
@Override
public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
}
@Override
public void afterCellDataConverted(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, CellData cellData, Cell cell, Head head, Integer integer, Boolean aBoolean) {
}
@Override
public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, List<CellData> list, Cell cell, Head head, Integer integer, Boolean aBoolean) {
//当前行
int curRowIndex = cell.getRowIndex();
//当前列
int curColIndex = cell.getColumnIndex();
if (curRowIndex > mergeRowIndex) {
for (int i = 0; i < mergeColumnIndex.length; i++) {
if (curColIndex == mergeColumnIndex[i]) {
mergeWithPrevRow(writeSheetHolder, cell, curRowIndex, curColIndex);
break;
}
}
}
}
/** * 当前单元格向上合并 * * @param writeSheetHolder * @param cell 当前单元格 * @param curRowIndex 当前行 * @param curColIndex 当前列 */
private void mergeWithPrevRow(WriteSheetHolder writeSheetHolder, Cell cell, int curRowIndex, int curColIndex) {
//获取当前行的第一列的数据和上一行的第一列数据，通过第一行数据是否相同进行合并
// Cell preCell_now = cell.getSheet().getRow(curRowIndex ).getCell(curColIndex);
// Object curData = preCell_now.getCellTypeEnum() == CellType.STRING ? preCell_now.getStringCellValue() : preCell_now.getNumericCellValue();
// Cell preCell = cell.getSheet().getRow(curRowIndex - 1).getCell(curColIndex - 1);
// Object preData = preCell.getCellTypeEnum() == CellType.STRING ? preCell.getStringCellValue() : preCell.getNumericCellValue();
//获取当前行的当前列的数据和上一行的当前列列数据，通过上一行数据是否相同进行合并
Object curData = cell.getCellTypeEnum() == CellType.STRING ? cell.getStringCellValue() : cell.getNumericCellValue();
Cell preCell = cell.getSheet().getRow(curRowIndex - 1).getCell(curColIndex);
Object preData = preCell.getCellTypeEnum() == CellType.STRING ? preCell.getStringCellValue() : preCell.getNumericCellValue();
// 比较当前行的第一列的单元格与上一行是否相同，相同合并当前单元格与上一行
//
if (curData.equals(preData)) {
Sheet sheet = writeSheetHolder.getSheet();
List<CellRangeAddress> mergeRegions = sheet.getMergedRegions();
boolean isMerged = false;
for (int i = 0; i < mergeRegions.size() && !isMerged; i++) {
CellRangeAddress cellRangeAddr = mergeRegions.get(i);
// 若上一个单元格已经被合并，则先移出原有的合并单元，再重新添加合并单元
if (cellRangeAddr.isInRange(curRowIndex - 1, curColIndex)) {
sheet.removeMergedRegion(i);
cellRangeAddr.setLastRow(curRowIndex);
sheet.addMergedRegion(cellRangeAddr);
isMerged = true;
}
}
// 若上一个单元格未被合并，则新增合并单元
if (!isMerged) {
CellRangeAddress cellRangeAddress = new CellRangeAddress(curRowIndex - 1, curRowIndex, curColIndex, curColIndex);
sheet.addMergedRegion(cellRangeAddress);
}
}
}
}
3.直接上controller代码
@GetMapping("/testExport")
public void testExport1(HttpServletResponse response) {
try {
// 设置第几列合并
int[] mergeColumnIndex = { 0,1,2,3};
// 需要从第几行开始合并
int mergeRowIndex = 1;
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");
// 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
List<UserPo> resultList= exportService.selectUserInfo();
// 使用java8新特性的stream流去处理数据，把空的数据过滤掉
List<UserBo> resultBo = resultList.stream().filter(Objects::nonNull)
.map(t -> {
return UserBo.builder()
.name(t.getName())
.sex(t.getSex())
.age(t.getAge())
.build();
}).collect(Collectors.toList());
// 设置文件名称
String fileName = URLEncoder.encode("测试导出", "UTF-8");
response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");
// sheet名称
EasyExcel.write(response.getOutputStream(), UserBo.class)
// excel版本
.excelType(ExcelTypeEnum.XLSX)
// 是否自动关流
.autoCloseStream(Boolean.TRUE)
.registerWriteHandler(new ExcelFillCellMergeStrategy(mergeRowIndex,mergeColumnIndex)).
sheet("测试导出").doWrite(resultBo);
} catch (Exception e) {
e.printStackTrace();
}
}
4.因为我是测试的数据，在service创建了集合，在集合里面加入了对象
@Override
public List<UserPo> selectUserInfo() {
UserPo userPo1 = new UserPo("11","老大","男","11");
UserPo userPo2 = new UserPo("22","老大","男","12");
UserPo userPo3 = new UserPo("33","老大","男","13");
UserPo userPo4 = new UserPo("44","李四","女","13");
UserPo userPo5 = new UserPo("55","王五","男","13");
UserPo userPo6 = new UserPo("66","刘六","男","11");
UserPo userPo7 = new UserPo("11","刘六","男","11");
UserPo userPo8 = new UserPo("66","刘六","男1","16");
UserPo userPo9 = new UserPo("66","刘六","男1","16");
UserPo userPo10 = new UserPo("66","11","男","14");
UserPo userPo11 = new UserPo("66","11","男2","16");
UserPo userPo12 = new UserPo("66","11","男2","16");
UserPo userPo13 = new UserPo("66","刘六","男","16");
UserPo userPo14 = new UserPo("66","刘六","男","6");
UserPo userPo15 = new UserPo("66","刘六","男","6");
UserPo userPo16 = new UserPo("66","刘六","男","16");
UserPo userPo17 = new UserPo("66","33","男","16");
UserPo userPo18 = new UserPo("66","刘六2","男","16");
UserPo userPo19 = new UserPo("66","刘六2","男","16");
UserPo userPo20 = new UserPo("66","刘六","男","16");
List<UserPo> list = new ArrayList<>();
list.add(userPo1);
list.add(userPo2);
list.add(userPo3);
list.add(userPo4);
list.add(userPo5);
list.add(userPo6);
list.add(userPo7 );
list.add(userPo8 );
list.add(userPo9 );
list.add(userPo10);
list.add(userPo11);
list.add(userPo12);
list.add(userPo13);
list.add(userPo14);
list.add(userPo15);
list.add(userPo16);
list.add(userPo17);
list.add(userPo18);
list.add(userPo19);
list.add(userPo20);
return list;
}
4.涉及到的实体类UserPo
@Data
@AllArgsConstructor
@NoArgsConstructor
public class UserPo {
private String Id;
private String name;
private String sex;
private String age;
}
6.涉及到的实体类 UserBo
@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
@ContentRowHeight(25)
@HeadRowHeight(25)
@ColumnWidth(25)
public class UserBo {
@ExcelProperty("姓名")
private String name;
@ExcelProperty("性别")
private String sex;
@ExcelProperty("年龄")
private String age;
}
7.访问路径 显示结果
