EasyExcel导出数据,自定义单元格样式(DEMO)
需求
对比AC, BD字段, 将不相同的的单元格标黄
实体类
@Data
public class EasyExcelTestEntity {
/**
* 字段a
*/
private String a;
/**
* 字段b
*/
private String b;
/**
* 字段c
*/
private String c;
/**
* 字段d
*/
private String d;
}
Excel.xlsx
业务流程
pulic void export(HttpServletResponse response) {
String fileName = [文件名] + ".xlsx";
try {
response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
response.setContentType("application/vnd.ms-excel");
ExcelWriter build = EasyExcel.write(response.getOutputStream())
.withTemplate(new ClassPathResource([Excel.xlsx路径]).getInputStream()).build();
// 查库, 获取导出数据
List<EasyExcelTestEntity> list = xxxService.selectXXX;
WriteSheet sheet = EasyExcel.writerSheet(0).registerWriteHandler(new ExcelFillCellStyleStrategy()).build();
build.write(list, sheet);
build.finish();
} catch (Exception e) {
e.printStackTrace();
}
}
自定策略
public class ExcelFillCellStyleStrategy implements CellWriteHandler {
@Override
public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row,
Head head, Integer integer, Integer integer1, Boolean aBoolean) {
}
@Override
public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Cell cell,
Head head, Integer integer, Boolean aBoolean) {
}
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<WriteCellData<?>> list, Cell cell, Head head, Integer integer,
Boolean aBoolean) {
// 当前列下标
int curColIndex = cell.getColumnIndex();
// 下标大于1时,当前单元格和前面对应的单元格进行对比
if (curColIndex > 1) {
addCellStyle(writeSheetHolder, cell, curColIndex);
}
}
private void addCellStyle(WriteSheetHolder writeSheetHolder, Cell cell, int curColIndex) {
// 当前单元格内容
Object curData = cell.getCellTypeEnum() == CellType.STRING ? cell.getStringCellValue() :
cell.getNumericCellValue();
// 对应单元格对象
Cell preCell = cell.getRow().getCell(curColIndex - 2);
// 对应单元格内容
Object preData = preCell.getCellTypeEnum() == CellType.STRING ? preCell.getStringCellValue() :
preCell.getNumericCellValue();
// 当前单元格内容与对应单元格内容不相同
if (!curData.equals(preData)) {
// 新建单元格样式对象
Workbook workbook = writeSheetHolder.getSheet().getWorkbook();
CellStyle cellStyle = workbook.createCellStyle();
// 将原始单元格样式克隆至新建的空的单元格样式对象
cellStyle.cloneStyleFrom(cell.getCellStyle());
// 设置背景色, 也可以设置其他样式
cellStyle.setFillForegroundColor(IndexedColors.YELLOW.getIndex());
cellStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
// 样式设置到当前单元格
cell.setCellStyle(cellStyle);
// 样式设置到对应单元格
preCell.setCellStyle(cellStyle);
}
}
}
效果
原文地址:http://www.cnblogs.com/yoojyn/p/yoojyn_easyexcel03.html
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