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@ -10,11 +10,18 @@ import com.alibaba.excel.EasyExcel;
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import com.alibaba.excel.ExcelWriter; |
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import com.alibaba.excel.util.FileUtils; |
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import com.alibaba.excel.util.ListUtils; |
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import com.alibaba.excel.write.handler.RowWriteHandler; |
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import com.alibaba.excel.write.handler.SheetWriteHandler; |
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import com.alibaba.excel.write.handler.WorkbookWriteHandler; |
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import com.alibaba.excel.write.handler.context.RowWriteHandlerContext; |
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import com.alibaba.excel.write.handler.context.SheetWriteHandlerContext; |
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import com.alibaba.excel.write.handler.context.WorkbookWriteHandlerContext; |
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import com.alibaba.excel.write.metadata.WriteSheet; |
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import lombok.extern.slf4j.Slf4j; |
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import org.apache.poi.ss.usermodel.Cell; |
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import org.apache.poi.ss.usermodel.Row; |
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import org.apache.poi.ss.usermodel.Sheet; |
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import org.apache.poi.ss.usermodel.Workbook; |
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import org.apache.poi.xssf.streaming.SXSSFWorkbook; |
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import org.junit.Ignore; |
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@ -72,6 +79,55 @@ public class WriteTest {
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} |
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} |
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/** |
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* 在指定单元格写入数据 |
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*/ |
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@Test |
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public void specifiedCellWrite() { |
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File file = TestFileUtil.createNewFile("rare/specifiedCellWrite" + System.currentTimeMillis() |
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+ ".xlsx"); |
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// 需要区分是在 最后一行之前 还是之后
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// 区分的原因是:excel只能一直向前,而且内存里面只存储100条,而afterRowDispose是在每一行写入完成的时候调用,所以修改一行需要拦截这个事件
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// 如果是在最后一行之后,由于后面不会再有数据了,所以只要拦截afterWorkbookDispose,在整个excel快写完的时候调用,继续写入数据即可
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EasyExcel.write(file, DemoData.class) |
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// 写入的值在最后一行之前
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.registerWriteHandler(new RowWriteHandler() { |
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@Override |
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public void afterRowDispose(RowWriteHandlerContext context) { |
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if (context.getRow().getRowNum() == 2) { |
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Cell cell = context.getRow().getCell(2); |
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if (cell == null) { |
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cell = context.getRow().createCell(2); |
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} |
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cell.setCellValue("测试的第二行数据呀"); |
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} |
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} |
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}) |
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// 写入的值 在最后一一行之后
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.registerWriteHandler(new WorkbookWriteHandler() { |
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@Override |
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public void afterWorkbookDispose(WorkbookWriteHandlerContext context) { |
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Workbook workbook = context.getWriteWorkbookHolder().getWorkbook(); |
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Sheet sheet = workbook.getSheetAt(0); |
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Row row = sheet.getRow(99); |
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if (row == null) { |
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row = sheet.createRow(99); |
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} |
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Cell cell = row.getCell(2); |
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if (cell == null) { |
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cell = row.createCell(2); |
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} |
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cell.setCellValue("测试地99行数据呀"); |
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} |
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}) |
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.sheet("模板") |
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.doWrite(data()); |
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log.info("写入到文件完成:{}", file); |
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} |
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private List<DemoData> data() { |
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List<DemoData> list = ListUtils.newArrayList(); |
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for (int i = 0; i < 10; i++) { |
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