Java后端导出Excel,合并复杂表头
时间: 2023-09-19 20:07:10 浏览: 114
你好!关于Java后端导出Excel并合并复杂表头的问题,可以使用Apache POI库来实现。
首先,需要创建一个Workbook对象,并使用它来创建Sheet对象。然后,可以使用CellRangeAddress类来定义要合并的单元格范围。最后,可以使用CellStyle类来设置单元格的样式,包括字体、边框、对齐方式等。
以下是一个示例代码,可以根据具体需求进行修改和扩展:
```java
// 创建Workbook和Sheet对象
Workbook workbook = new XSSFWorkbook();
Sheet sheet = workbook.createSheet("Sheet1");
// 定义表头单元格范围
CellRangeAddress region1 = new CellRangeAddress(0, 0, 0, 3);
CellRangeAddress region2 = new CellRangeAddress(0, 0, 4, 7);
CellRangeAddress region3 = new CellRangeAddress(1, 2, 0, 0);
CellRangeAddress region4 = new CellRangeAddress(1, 1, 1, 3);
CellRangeAddress region5 = new CellRangeAddress(1, 1, 4, 7);
// 合并单元格
sheet.addMergedRegion(region1);
sheet.addMergedRegion(region2);
sheet.addMergedRegion(region3);
sheet.addMergedRegion(region4);
sheet.addMergedRegion(region5);
// 创建表头行和数据行
Row headerRow = sheet.createRow(0);
Row dataRow = sheet.createRow(1);
// 设置表头单元格样式
CellStyle headerStyle = workbook.createCellStyle();
Font headerFont = workbook.createFont();
headerFont.setBold(true);
headerStyle.setFont(headerFont);
headerStyle.setBorderBottom(BorderStyle.THIN);
headerStyle.setBorderLeft(BorderStyle.THIN);
headerStyle.setBorderRight(BorderStyle.THIN);
headerStyle.setBorderTop(BorderStyle.THIN);
headerStyle.setAlignment(HorizontalAlignment.CENTER);
// 创建表头单元格并设置样式
Cell headerCell1 = headerRow.createCell(0);
headerCell1.setCellValue("表头1");
headerCell1.setCellStyle(headerStyle);
Cell headerCell2 = headerRow.createCell(4);
headerCell2.setCellValue("表头2");
headerCell2.setCellStyle(headerStyle);
Cell headerCell3 = headerRow.createCell(1);
headerCell3.setCellValue("表头3");
headerCell3.setCellStyle(headerStyle);
Cell headerCell4 = headerRow.createCell(4);
headerCell4.setCellValue("表头4");
headerCell4.setCellStyle(headerStyle);
// 设置数据单元格样式
CellStyle dataStyle = workbook.createCellStyle();
dataStyle.setBorderBottom(BorderStyle.THIN);
dataStyle.setBorderLeft(BorderStyle.THIN);
dataStyle.setBorderRight(BorderStyle.THIN);
dataStyle.setBorderTop(BorderStyle.THIN);
dataStyle.setAlignment(HorizontalAlignment.CENTER);
// 创建数据单元格并设置样式
Cell dataCell1 = dataRow.createCell(0);
dataCell1.setCellValue("数据1");
dataCell1.setCellStyle(dataStyle);
Cell dataCell2 = dataRow.createCell(1);
dataCell2.setCellValue("数据2");
dataCell2.setCellStyle(dataStyle);
Cell dataCell3 = dataRow.createCell(2);
dataCell3.setCellValue("数据3");
dataCell3.setCellStyle(dataStyle);
Cell dataCell4 = dataRow.createCell(4);
dataCell4.setCellValue("数据4");
dataCell4.setCellStyle(dataStyle);
Cell dataCell5 = dataRow.createCell(5);
dataCell5.setCellValue("数据5");
dataCell5.setCellStyle(dataStyle);
Cell dataCell6 = dataRow.createCell(6);
dataCell6.setCellValue("数据6");
dataCell6.setCellStyle(dataStyle);
Cell dataCell7 = dataRow.createCell(7);
dataCell7.setCellValue("数据7");
dataCell7.setCellStyle(dataStyle);
// 输出Excel文件
FileOutputStream outputStream = new FileOutputStream("test.xlsx");
workbook.write(outputStream);
workbook.close();
outputStream.close();
```
在上面的示例代码中,我们创建了一个包含复杂表头和数据的Excel文件,并输出到磁盘上。你可以根据自己的需求来修改代码,实现相应的功能。
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