我这里的需求是,使用excel将系统统计结果导出,设置样式、格式后,转换为矢量图svg。使用到 Free-Spire-XLS 。
一、引入maven依赖:
<dependencies>
<dependency>
<groupId>e-iceblue</groupId>
<artifactId>spire.xls.free</artifactId>
<version>2.2.0</version>
</dependency>
</dependencies>
<repositories>
<repository>
<id>com.e-iceblue</id>
<name>e-iceblue</name>
<url>http://repo.e-iceblue.com/nexus/content/groups/public/</url>
</repository>
</repositories>
二、转换工具类
import com.spire.xls.Worksheet;
import org.apache.poi.ss.usermodel.Workbook;
import sun.misc.BASE64Encoder;
import javax.imageio.ImageIO;
import javax.imageio.stream.ImageInputStream;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
/**
* Excel转换处理工具类:转为图片、svg文件等
*
* @author yangfeng
* @date 2019-12-26
*/
public class ExcelTransformUtil {
/**
* workbook 转为输入流
*
* @param workbook
* @return
* @throws Exception
*/
public static InputStream convert2Stream(Workbook workbook) throws Exception {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
workbook.write(bos);
byte[] barray = bos.toByteArray();
return new ByteArrayInputStream(barray);
}
/**
* excel 转为图片
*
* @param inputStream
*/
public static void excel2Img(InputStream inputStream) {
com.spire.xls.Workbook book;
try {
book = new com.spire.xls.Workbook();
book.loadFromStream(inputStream);
Worksheet sheet = book.getWorksheets().get(0);
sheet.saveToImage("d://toImg.png");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* excel 转为SVG
*
* @param inputStream
*/
public static void excel2SVG(InputStream inputStream, HttpServletResponse response) {
com.spire.xls.Workbook book;
try {
book = new com.spire.xls.Workbook();
book.loadFromStream(inputStream);
Worksheet sheet = book.getWorksheets().get(0);
sheet.toSVGStream(response.getOutputStream(), sheet.getFirstRow(), sheet.getFirstColumn(),
sheet.getLastRow(), sheet.getLastColumn());
} catch (Exception e) {
e.printStackTrace();
}
}
}
三、生成svg服务
public void generateSVG(ReportRequest request, HttpServletResponse response) throws Exception {
ServiceResult<List<OperationReportVO>> result = getOperationReport(request);
if (result != null && result.isSucceed() && !CollectionUtils.isEmpty(result.getData())) {
//转为map
List<Map<String, Object>> list = MapBeanUtil.objectsToMaps(result.getData());
Workbook workbook = ReportExportUtil.generateExcelReport("运行情况统计表",
getDateAndWeek(request.getPlanDate()), list, OperationReportVO.class);
ExcelTransformUtil.excel2SVG(ExcelTransformUtil.convert2Stream(workbook), response);
}
}
此处的Workbook引自包:org.apache.poi.ss.usermodel.Workbook 。生成excel的workbook。然后将workbook转为输入流,com.spire.xls.Workbook读取输入流,转成svg。