在很多人脸识别和报表应用里面，批量导入是一个非常常见的需求，这里我分享一个读取使用POI和Easypoi读取Excel文件里面的图片以及文字的方法
- 导入easypoi的pom包
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-base</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-web</artifactId>
<version>3.2.0</version>
</dependency>
<dependency>
<groupId>cn.afterturn</groupId>
<artifactId>easypoi-annotation</artifactId>
<version>3.2.0</version>
</dependency>
2.书写按顺序读取excel内图片的工具类
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.PictureData;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
// 用户读取用户上传Excel表格里面的图片
public class ReadExcelUtils {
public static ArrayList<byte[]> uploadPerson(String filePath) throws Exception{
InputStream inp = new FileInputStream(filePath);
HSSFWorkbook workbook = (HSSFWorkbook) WorkbookFactory.create(inp);
List <HSSFPictureData> pictures = workbook.getAllPictures();
HSSFSheet sheet = (HSSFSheet) workbook.getSheetAt(0);
ArrayList<byte[]> arrayList = new ArrayList<>();
for (HSSFShape shape: sheet.getDrawingPatriarch().getChildren()) {
HSSFClientAnchor anchor = (HSSFClientAnchor) shape.getAnchor();
if (shape instanceof HSSFPicture) {
HSSFPicture pic = (HSSFPicture) shape;
int row = anchor.getRow2();
int col = anchor.getCol2();
System.out.println("--->" + anchor.getRow2() + ":" + anchor.getCol2());
//map.put(row+":"+col, row+":"+col);
int pictureIndex = pic.getPictureIndex() - 1;
HSSFPictureData picData = pictures.get(pictureIndex);
byte[] data = picData.getData();
arrayList.add(data);
}
}
return arrayList;
}
public static void savePic(String i, PictureData pic) throws Exception {
String ext = pic.suggestFileExtension();
byte[] data = pic.getData();
if (ext.equals("jpeg")) {
FileOutputStream out = new FileOutputStream("D:\\excel\\" + i + ".jpg");
out.write(data);
out.close();
File file = new File("D:\\excel\\" + i + ".jpg");
FileInputStream in = new FileInputStream(file);
System.out.println("in===>" + in );
if (file.isFile()) {
file.delete();
System.out.println("=============delete");
}
}
}
}
3.按顺序读取完图片后，再按顺序读取excel内的文字信息
personDto dto类
@Excel(name = "姓名")
public String personName;
@Excel(name = "人员类型")
public String personType;
// 此字段用于存放图片的byte流，因此不需要加上@Excel
byte[] faceImage;
读取Excel内表格文字数据的函数
import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
/**
* @Description: 表格工具类
*/
public class PoiUtils {
public static void exportExcel(List < ? > list, String title, String sheetName, Class < ? > pojoClass,
String fileName, boolean isCreateHeader, HttpServletResponse response) {
ExportParams exportParams = new ExportParams(title, sheetName);
exportParams.setCreateHeadRows(isCreateHeader);
defaultExport(list, pojoClass, fileName, response, exportParams);
}
public static void exportExcel(List < ? > list, String title, String sheetName, Class < ? > pojoClass,
String fileName, HttpServletResponse response) {
defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
}
public static void exportExcel(List < Map < String, Object >> list, String fileName, HttpServletResponse response) {
defaultExport(list, fileName, response);
}
private static void defaultExport(List < ? > list, Class < ? > pojoClass, String fileName,
HttpServletResponse response, ExportParams exportParams) {
Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
if (workbook != null);
downLoadExcel(fileName, response, workbook);
}
private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
try {
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition",
"attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
workbook.write(response.getOutputStream());
} catch (IOException e) {
throw new RuntimeException(e.getMessage());
}
}
private static void defaultExport(List < Map < String, Object >> list, String fileName, HttpServletResponse response) {
Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
if (workbook != null);
downLoadExcel(fileName, response, workbook);
}
/**
* 导入
* @param filePath
* @param titleRows
* @param headerRows
* @param pojoClass
* @param <T>
* @return
*/
public static < T > List < T > importExcel(String filePath, Integer titleRows, Integer headerRows, Class <
T > pojoClass) {
if (StringUtils.isBlank(filePath)) {
return null;
}
ImportParams params = new ImportParams();
params.setTitleRows(titleRows);
params.setHeadRows(headerRows);
List < T > list = null;
try {
list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
} catch (NoSuchElementException e) {
throw new RuntimeException("模板不能为空");
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e.getMessage());
}
return list;
}
/**
* 导入表格
* @param file
* @param pojoClass
* @param <T>
* @return
*/
public static < T > List < T > importExcel(MultipartFile file, Class < T > pojoClass) {
if (file == null) {
return null;
}
ImportParams params = new ImportParams();
try {
List < T > list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
return list;
} catch (NoSuchElementException e) {
throw new RuntimeException("excel文件不能为空");
} catch (Exception e) {
throw new RuntimeException(e.getMessage());
}
}
}
最后外层只需要这样调用即可组装成一个读取到excel图片byte流和文字的List了
// 读取Excel表格里面的所有图片的byte[]
FileUtils.byte2File(file.getBytes(),"D:\\excel\\excelFile.xls");
ArrayList<byte[]> bytes=ReadExcelUtils.uploadPerson("D:\\excel\\excelFile.xls");
// 读取Excel表格里面的所有基础数据
List<PersonDto> result = PoiUtils.importExcel(file,PersonDto.class);
for (int i=0;i<result.size();i++){
result.get(i).setFaceImage(bytes.get(i));
}
网友评论