Java代码生成Excel流文件,不生成实际的excel文件,流文件放到邮件的附件中生成实际的Excel文件并发送
时间: 2024-02-19 10:03:44 浏览: 104
可以使用Apache POI来生成Excel流文件。以下是示例Java代码:
```java
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import javax.mail.MessagingException;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMultipart;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelGenerator {
public static MimeMultipart generateExcel() throws IOException, MessagingException {
// Create a new workbook
Workbook workbook = new XSSFWorkbook();
// Create a sheet in the workbook
Sheet sheet = workbook.createSheet("Sheet1");
// Create a header row
Row headerRow = sheet.createRow(0);
Cell headerCell = headerRow.createCell(0);
headerCell.setCellValue("Header");
// Create some data rows
Row dataRow = sheet.createRow(1);
Cell dataCell = dataRow.createCell(0);
dataCell.setCellValue("Data");
// Write the workbook to a byte array output stream
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
workbook.write(outputStream);
// Create a MIME body part for the Excel attachment
MimeBodyPart attachmentPart = new MimeBodyPart();
attachmentPart.setFileName("example.xlsx");
attachmentPart.setContent(outputStream.toByteArray(), "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
// Create a MIME multipart message with the Excel attachment
MimeMultipart multipart = new MimeMultipart();
multipart.addBodyPart(attachmentPart);
return multipart;
}
}
```
该代码使用XSSFWorkbook来创建一个工作簿,并在其中创建一个名为“Sheet1”的工作表。该代码还创建一个标题行和一个数据行,然后将工作簿写入ByteArrayOutputStream。最后,该代码将Excel流文件作为附件添加到MIME多部分消息中。