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java 读取excel图片导入(亲测有效)

javaexcel开发语言 2023-08-16 15:08:42 349人浏览 泡泡鱼
摘要

从excel文件中获取图片(兼容新老版本) public static Map getPictureFromExcel(File file, int sheetNum) throws EncryptedDocumentExc

excel文件中获取图片(兼容新老版本)

        public static Map 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 pictures = getPictures(sheet);            return pictures;        } else if (fileName.endsWith("xlsx")) {            //2007            workbook = new XSSFWorkbook(fileInputStream);            XSSFSheet sheet = (XSSFSheet) workbook.getSheetAt(sheetNum - 1);            Map pictures = getPictures(sheet);            return pictures;        }        return new HashMap();    }

从sheet页中获取图片及图片位置

    public static Map getPictures (HSSFSheet sheet) throws IOException {        Map map = new HashMap();        List 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;    }        public static Map getPictures (XSSFSheet sheet) throws IOException {        Map map = new HashMap();        List list = sheet.getRelations();        for (POIXMLDocumentPart part : list) {            if (part instanceof XSSFDrawing) {                XSSFDrawing drawing = (XSSFDrawing) part;                List 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 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

来源地址:https://blog.csdn.net/qq_47100953/article/details/128921497

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本文标题: java 读取excel图片导入(亲测有效)

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