java读取excel图片导入代码示例(亲测有效)
作者：学 无止境
在日常工作中,我们经常要将一些照片插入到Excel表格中,这篇文章主要给大家介绍了关于java读取excel图片导入的相关资料,文中通过代码介绍的非常详细,需要的朋友可以参考下
从excel文件中获取图片(兼容新老版本)
/**
* 获取excel表中的图片
*
* @return
* @throws IOException
* @throws InvalidFormatException
* @throws EncryptedDocumentException
* @Param fis 文件输入流
* @Param sheetNum Excel表中的sheet编号
*/
public static Map<String, PictureData> getPictureFromExcel(File file, int sheetNum) throws EncryptedDocumentException, IOException {
//获取图片PictureData集合
String fileName = file.getName();
Workbook workbook = null;
if (StringUtil.isEmpty(fileName)) {
return null;
}
FileInputStream fileInputStream = new FileInputStream(file);
if (fileName.endsWith("xls")) {
//2003
workbook = new HSSFWorkbook(fileInputStream);
HSSFSheet sheet = (HSSFSheet) workbook.getSheetAt(sheetNum - 1);
Map<String, PictureData> pictures = getPictures(sheet);
return pictures;
} else if (fileName.endsWith("xlsx")) {
//2007
workbook = new XSSFWorkbook(fileInputStream);
XSSFSheet sheet = (XSSFSheet) workbook.getSheetAt(sheetNum - 1);
Map<String, PictureData> pictures = getPictures(sheet);
return pictures;
}
return new HashMap();
}
从sheet页中获取图片及图片位置
/**
* 获取图片和位置 (xls版)
* @param sheet
* @return
* @throws IOException
*/
public static Map<String, PictureData> getPictures (HSSFSheet sheet) throws IOException {
Map<String, PictureData> map = new HashMap<String, PictureData>();
List<HSSFShape> list = sheet.getDrawingPatriarch().getChildren();
for (HSSFShape shape : list) {
if (shape instanceof HSSFPicture) {
HSSFPicture picture = (HSSFPicture) shape;
HSSFClientAnchor cAnchor = picture.getClientAnchor();
PictureData pdata = picture.getPictureData();
String key = cAnchor.getRow1() + "-" + cAnchor.getCol1(); // 行号-列号
map.put(key, pdata);
}
}
return map;
}
/**
* 获取图片和位置 (xlsx版)
* @param sheet
* @return
* @throws IOException
*/
public static Map<String, PictureData> getPictures (XSSFSheet sheet) throws IOException {
Map<String, PictureData> map = new HashMap<String, PictureData>();
List<POIXMLDocumentPart> list = sheet.getRelations();
for (POIXMLDocumentPart part : list) {
if (part instanceof XSSFDrawing) {
XSSFDrawing drawing = (XSSFDrawing) part;
List<XSSFShape> shapes = drawing.getShapes();
for (XSSFShape shape : shapes) {
XSSFPicture picture = (XSSFPicture) shape;
XSSFClientAnchor anchor = picture.getPreferredSize();
CTMarker marker = anchor.getFrom();
String key = marker.getRow() + "-" + marker.getCol();
map.put(key, picture.getPictureData());
}
}
}
return map;
}
main方法-获取excel文件中的图片下载到本地
public static void main(String [] args) throws IOException {
File file = new File("C:\\Users\\A\\Desktop\\test.xlsx");
//获取图片数据
Map<String, PictureData> map = getPictureFromExcel(file, 1);
//根据图片行列位置获取图片
PictureData picData = (PictureData)map.get("3"+"-"+14);
//后缀名
String extension = picData.suggestFileExtension();
byte[] data = picData.getData();
FileOutputStream out = new FileOutputStream("C:\\Users\\A\\Desktop\\" + "picture." + extension);
out.write(data);
out.close();
}
遇到问题：图片导入解析报错异常java.lang.ClassCastException: org.apache.poi.xssf.usermodel.
XSSFSimpleShape cannot be cast to org.apache.poi.xssf.usermodel.XSSFPicture问题
解决方法：经过排查，为xslx版本shap对象强转为图片对象报错，添加逻辑首先检验if (shape instanceof XSSFPicture)类型然后再进行强转，问题解决
总结
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