Java文件处理之使用itextpdf实现excel转pdf

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>4.1.0</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-scratchpad</artifactId>
    <version>4.1.0</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>4.1.0</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml-schemas</artifactId>
    <version>4.1.0</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-excelant</artifactId>
    <version>4.1.0</version>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.13</version>
</dependency>
<!--   hutool    -->
<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.3.7</version>
</dependency>

import com.itextpdf.text.pdf.BaseFont;
import java.util.HashMap;
import java.util.Map;

/**
 * 读取字体
 */
public class FontGenerater {
    // 符号
    public final static String EMPTY = "";
    public final static String FXG = "\\";
    public final static String DIAN = ".";
    //for report
    public final static String HG = "-";
    public final static String REPORT_UNDERLINE = "<r_u>";
    public final static String REPORT_UNDERLINE_SUFFIX = "</r_u>";
    public final static String NORMAL_CHAR_SET = "UTF-8";

    // font
    public static final short FONT_SMALL_SIZE = 8;
    public static final int FONT_SMALL_VALUELENGTH = 12;
    public static String FONT_URL = EMPTY;
    public static Map FONTMAP = null;
    public static final String FONT_HWXK_NAME = "华文行楷";
    public static final String FONT_HWXK = "/STXINGKA.TTF";
    public static final String FONT_FS_NAME = "仿宋";
    public static final String FONT_FS_NAME_PINYIN = "FangSong";
    public static final String FONT_FS = "\\simfang.ttf";
    public static final String FONT_CALIBRI_NAME = "Calibri";
    public static final String FONT_CALIBRI = "\\calibri.ttf";
    public static final String FONT_CONSOLAS_NAME = "Consolas";
    public static final String FONT_CONSOLAS = "\\consola.ttf";
    public static final String FONT_DENGXIAN_NAME = "等线";
    public static final String FONT_DENGXIAN = "\\Deng.ttf";
    public static final String FONT_SONTI_NAME = "宋体";
    public static final String FONT_SONTI = "\\simsun.ttc,0";

    public static BaseFont getFont(String name) {
        if (FONTMAP == null) {
            FONT_URL = "D:\\website\\tplResource\\font";
            FONTMAP = new HashMap<String, BaseFont>() {{
                try {
                    put(FONT_SONTI_NAME, BaseFont.createFont(FONT_URL + FONT_SONTI, BaseFont.IDENTITY_H, BaseFont.EMBEDDED));
                    put(FONT_HWXK_NAME, BaseFont.createFont(FONT_URL + FONT_HWXK, BaseFont.IDENTITY_H, BaseFont.EMBEDDED));
                    put(FONT_FS_NAME, BaseFont.createFont(FONT_URL + FONT_FS, BaseFont.IDENTITY_H, BaseFont.EMBEDDED));
                    put(FONT_FS_NAME_PINYIN, BaseFont.createFont(FONT_URL + FONT_FS, BaseFont.IDENTITY_H, BaseFont.EMBEDDED));
                    put(FONT_CALIBRI_NAME, BaseFont.createFont(FONT_URL + FONT_CALIBRI, BaseFont.IDENTITY_H, BaseFont.EMBEDDED));
                    put(FONT_CONSOLAS_NAME, BaseFont.createFont(FONT_URL + FONT_CONSOLAS, BaseFont.IDENTITY_H, BaseFont.EMBEDDED));
                    put(FONT_DENGXIAN_NAME, BaseFont.createFont(FONT_URL + FONT_DENGXIAN, BaseFont.IDENTITY_H, BaseFont.EMBEDDED));
                } catch (Exception e) {

                }
            }};
        }
        return (BaseFont) FONTMAP.get(name);
    }
}

import cn.hutool.core.util.StrUtil;
import com.itextpdf.text.Font;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ooxml.POIXMLDocumentPart;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.*;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTMarker;
import xyz.xunfan.xbs.constant.FontGenerater;

import java.text.DecimalFormat;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

public class Excel2Pdf {
    public static PdfPTable excelToPdf(Workbook workbook, String filename, float pagewidth, int sheetindex) throws Exception {
        Sheet sheet = workbook.getSheetAt(sheetindex);

        float[] widths = getColWidth(sheet);

        PdfPTable table = new PdfPTable(widths);
        table.setWidthPercentage(90);
        table.setLockedWidth(true);
        table.setTotalWidth(pagewidth);
        int colCount = widths.length;

        for (int r = 0; r < sheet.getPhysicalNumberOfRows(); r++) {
            Row row = sheet.getRow(r);
            if (row != null) {
                for (int c = 0; c < colCount; c++) {

                    Cell excelCell = row.getCell(c);
                    if (excelCell == null) {
                        excelCell = row.createCell(c);
                    }
                    String value = "";
                    if (excelCell != null) {
                        excelCell.setCellType(CellType.STRING);
                        value = excelCell.getStringCellValue() == null ? "" : excelCell.getStringCellValue();
                    }
                    org.apache.poi.ss.usermodel.Font excelFont = getExcelFont(workbook, excelCell, filename);

                    short fontsize = excelFont.getFontHeightInPoints();
                    if (!StrUtil.isEmpty(value) && value.length() > FontGenerater.FONT_SMALL_VALUELENGTH && value.split(FontGenerater.HG).length >= 3 && r <= 1) {
                        fontsize = FontGenerater.FONT_SMALL_SIZE;
                    }
                    Font pdFont = getFont(excelFont.getFontName(), fontsize, excelFont.getBold());

                    PdfPCell pCell = null;
                    if (value.indexOf(FontGenerater.REPORT_UNDERLINE) >= 0) {
                        pCell = new PdfPCell(new Phrase(FontGenerater.EMPTY, pdFont));
                        Paragraph para = new Paragraph();
                        String[] values = value.split(FontGenerater.REPORT_UNDERLINE_SUFFIX);
                        for (String v : values) {
                            if (v.indexOf(FontGenerater.REPORT_UNDERLINE) >= 0) {
                                v = v.replace(FontGenerater.REPORT_UNDERLINE, FontGenerater.EMPTY);
                                Chunk dateUnderline = new Chunk(v);
                                dateUnderline.setUnderline(0.1f, -2f);

                                para.add(dateUnderline);
                            } else {
                                para.add(new Chunk(v));
                            }
                        }
                        pCell.getPhrase().add(para);
                    } else {
                        pCell = new PdfPCell(new Phrase(value, pdFont));
                    }

                    List<PicturesInfo> infos = POIExtend.getAllPictureInfos(sheet, r, r, c, c, false);
                    if (!infos.isEmpty()) {
                        PicturesInfo info = infos.get(0);
                        Image img = Image.getInstance(infos.get(0).getPictureData());
                        img.scaleToFit(120, 120);
                        pCell = new PdfPCell(img);
                        pCell.setUseAscender(true);
                        pCell.setHorizontalAlignment(Element.ALIGN_CENTER);
                        pCell.setVerticalAlignment(Element.ALIGN_MIDDLE);
                    }

                    pCell.setBorder(0);
                    pCell.setHorizontalAlignment(getHorAglin(excelCell.getCellStyle().getAlignment().getCode()));
                    pCell.setVerticalAlignment(getVerAglin(excelCell.getCellStyle().getVerticalAlignment().getCode()));

                    pCell.setMinimumHeight(row.getHeightInPoints());

                    if (isMergedRegion(sheet, r, c)) {

                        int[] line = getMerged(sheet, r, c);
                        if (r == line[0]) {
                            pCell.setBorderWidthLeft(excelCell.getCellStyle().getBorderLeft().getCode());
                            pCell.setBorderWidthTop(excelCell.getCellStyle().getBorderTop().getCode());
                        }
                        if (line[1] == sheet.getPhysicalNumberOfRows() - 1) {
                            pCell.setBorderWidthBottom(sheet.getRow(line[1]).getCell(line[2]).getCellStyle().getBorderBottom().getCode());
                        }

                        int[] span = getMergedSpan(sheet, r, c);
                        if (span[0] == 1 && span[1] == 1) {//忽略合并过的单元格
                            continue;
                        }
                        pCell.setRowspan(span[0]);
                        pCell.setColspan(span[1]);
                        c = c + span[1] - 1;//合并过的列直接跳过
                    } else {
                        pCell.setBorderWidthTop(excelCell.getCellStyle().getBorderTop().getCode());
                        pCell.setBorderWidthLeft(excelCell.getCellStyle().getBorderLeft().getCode());
                    }

                    if (r == sheet.getPhysicalNumberOfRows() - 1) {
                        pCell.setBorderWidthBottom(excelCell.getCellStyle().getBorderBottom().getCode());
                    }

                    if (c == row.getPhysicalNumberOfCells() - 1) {
                        pCell.setBorderWidthRight(excelCell.getCellStyle().getBorderRight().getCode());
                    }
                    table.addCell(pCell);
                }
            } else {
                PdfPCell pCell = new PdfPCell(new Phrase(FontGenerater.EMPTY));

                pCell.setBorder(0);
                pCell.setMinimumHeight(13);
                table.addCell(pCell);
            }
        }

        return table;
    }

    //获取字体
    private static org.apache.poi.ss.usermodel.Font getExcelFont(Workbook workbook, Cell cell, String excelName) {

        if (excelName.endsWith(".xls")) {
            return ((HSSFCell) cell).getCellStyle().getFont(workbook);
        }
        return ((XSSFCell) cell).getCellStyle().getFont();
    }

    /**
     * 判断excel单元格是否有边框
     *
     * @param excelCell
     * @return
     */
    private static boolean hasBorder(Cell excelCell) {
        short top = excelCell.getCellStyle().getBorderTop().getCode();
        short bottom = excelCell.getCellStyle().getBorderBottom().getCode();
        short left = excelCell.getCellStyle().getBorderLeft().getCode();
        short right = excelCell.getCellStyle().getBorderRight().getCode();
        return top + bottom + left + right > 2;
    }

    private static void setBorder(Cell excelCell, PdfPCell pCell) {
        pCell.setBorderWidthTop(excelCell.getCellStyle().getBorderTop().getCode());
        pCell.setBorderWidthBottom(excelCell.getCellStyle().getBorderBottom().getCode());
        pCell.setBorderWidthLeft(excelCell.getCellStyle().getBorderLeft().getCode());
        pCell.setBorderWidthRight(excelCell.getCellStyle().getBorderRight().getCode());
    }

    /**
     * 获取excel单元格数据显示格式
     *
     * @param dataFormat
     * @return
     * @throws Exception
     */
    private static String getNumStyle(String dataFormat) throws Exception {
        if (dataFormat == null || dataFormat.length() == 0) {
            throw new Exception("");
        }
        if (dataFormat.indexOf("%") > -1) {
            return dataFormat;
        } else {
            return dataFormat.substring(0, dataFormat.length() - 2);
        }
    }

    /**
     * 判断单元格是否是合并单元格
     *
     * @param sheet
     * @param row
     * @param column
     * @return
     */
    private static boolean isMergedRegion(Sheet sheet, int row, int column) {
        int sheetMergeCount = sheet.getNumMergedRegions();
        for (int i = 0; i < sheetMergeCount; i++) {
            CellRangeAddress range = sheet.getMergedRegion(i);
            int firstColumn = range.getFirstColumn();
            int lastColumn = range.getLastColumn();
            int firstRow = range.getFirstRow();
            int lastRow = range.getLastRow();
            if (row >= firstRow && row <= lastRow) {
                if (column >= firstColumn && column <= lastColumn) {
                    return true;
                }
            }
        }
        return false;
    }

    private static int[] getMerged(Sheet sheet, int row, int column) {
        int sheetMergeCount = sheet.getNumMergedRegions();
        int[] span = {0, 0, 0, 0};
        for (int i = 0; i < sheetMergeCount; i++) {
            CellRangeAddress range = sheet.getMergedRegion(i);
            int firstColumn = range.getFirstColumn();
            int lastColumn = range.getLastColumn();
            int firstRow = range.getFirstRow();
            int lastRow = range.getLastRow();
            if (row >= firstRow && row <= lastRow) {
                if (column >= firstColumn && column <= lastColumn) {
                    span[0] = firstRow;
                    span[1] = lastRow;
                    span[2] = firstColumn;
                    span[3] = lastColumn;
                    break;
                }
            }
        }
        return span;
    }

    /**
     * 计算合并单元格合并的跨行跨列数
     *
     * @param sheet
     * @param row
     * @param column
     * @return
     */
    private static int[] getMergedSpan(Sheet sheet, int row, int column) {
        int sheetMergeCount = sheet.getNumMergedRegions();
        int[] span = {1, 1};
        for (int i = 0; i < sheetMergeCount; i++) {
            CellRangeAddress range = sheet.getMergedRegion(i);
            int firstColumn = range.getFirstColumn();
            int lastColumn = range.getLastColumn();
            int firstRow = range.getFirstRow();
            int lastRow = range.getLastRow();
            if (firstColumn == column && firstRow == row) {
                span[0] = lastRow - firstRow + 1;
                span[1] = lastColumn - firstColumn + 1;
                break;
            }
        }

        return span;
    }

    /**
     * 获取excel中每列宽度的占比
     *
     * @param sheet
     * @return
     */
    private static float[] getColWidth(Sheet sheet) {
        int rowNum = getMaxColRowNum(sheet);
        Row row = sheet.getRow(rowNum);
        int cellCount = row.getPhysicalNumberOfCells();
        int[] colWidths = new int[cellCount];
        int sum = 0;

        for (int i = 0; i < cellCount; i++) {
            Cell cell = row.getCell(i);
            if (cell != null) {
                colWidths[i] = sheet.getColumnWidth(i);
                sum += sheet.getColumnWidth(i);
            }
        }

        float[] colWidthPer = new float[cellCount];
        for (int i = 0; i < cellCount; i++) {
            colWidthPer[i] = (float) colWidths[i] / sum * 100;
        }
        return colWidthPer;
    }

    /**
     * 获取excel中列数最多的行号
     *
     * @param sheet
     * @return
     */
    private static int getMaxColRowNum(Sheet sheet) {
        int rowNum = 0;
        int maxCol = 0;
        for (int r = 0; r < sheet.getPhysicalNumberOfRows(); r++) {
            Row row = sheet.getRow(r);
            if (row != null && maxCol < row.getPhysicalNumberOfCells()) {
                maxCol = row.getPhysicalNumberOfCells();
                rowNum = r;
            }
        }
        return rowNum;
    }

    /**
     * excel垂直对齐方式映射到pdf对齐方式
     *
     * @param aglin
     * @return
     */
    private static int getVerAglin(int aglin) {
        switch (aglin) {
            case 1:
                return Element.ALIGN_MIDDLE;
            case 2:
                return Element.ALIGN_BOTTOM;
            case 0:
                return Element.ALIGN_TOP;
            default:
                return Element.ALIGN_MIDDLE;
        }
    }

    /**
     * excel水平对齐方式映射到pdf水平对齐方式
     *
     * @param aglin
     * @return
     */
    private static int getHorAglin(int aglin) {
        switch (aglin) {
            case 2:
                return Element.ALIGN_CENTER;
            case 3:
                return Element.ALIGN_RIGHT;
            case 1:
                return Element.ALIGN_LEFT;
            default:
                return Element.ALIGN_CENTER;
        }
    }

    /**
     * 格式化数字
     *
     * @param pattern
     * @param num
     * @return
     */
    private static String numFormat(String pattern, double num) {
        DecimalFormat format = new DecimalFormat(pattern);
        return format.format(num);
    }

    private static int[] getImgPostion(String imgKey) {
        String[] arr = imgKey.split("_");
        int[] position = new int[arr.length];
        for (int i = 0; i < arr.length; i++) {
            position[i] = Integer.parseInt(arr[i]);
        }
        return position;
    }

    public static Map<String, HSSFPictureData> getPictrues(HSSFWorkbook wb) {
        Map<String, HSSFPictureData> map = new HashMap<String, HSSFPictureData>();
        // getAllPictures方法只能获取不同的图片，如果Excel中存在相同的图片，只能得到一张图片
        List<HSSFPictureData> pics = wb.getAllPictures();
        if (pics.size() == 0) {
            return map;
        }
        for (Integer sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {
            HSSFSheet sheet = wb.getSheetAt(sheetIndex);
            HSSFPatriarch patriarch = sheet.getDrawingPatriarch();
            if (patriarch == null) {
                continue;
            }
            for (HSSFShape shape : patriarch.getChildren()) {
                HSSFClientAnchor anchor = (HSSFClientAnchor) shape.getAnchor();
                if (shape instanceof HSSFPicture) {
                    HSSFPicture pic = (HSSFPicture) shape;
                    int picIndex = pic.getPictureIndex() - 1;
                    HSSFPictureData picData = pics.get(picIndex);
                    // 键格式：sheet索引_行号_列号_单元格内的上边距_单元格内的左边距_uuid
                    String key = sheetIndex + "_" + anchor.getRow1() + "_" + anchor.getCol1() + "_" + anchor.getRow2() + "_" + anchor.getCol2();
                    key += "_" + anchor.getDx1() + "_" + anchor.getDy1() + "_" + anchor.getDx2() + "_" + anchor.getDy2();
                    key += "_" + UUID.randomUUID();
                    map.put(key, picData);
                }
            }
        }
        return map;
    }

    public static Map<String, PictureData> getPictrues(Workbook wb, int type) {
        Map<String, PictureData> map = new HashMap<String, PictureData>();
        // getAllPictures方法只能获取不同的图片，如果Excel中存在相同的图片，只能得到一张图片
        List<? extends PictureData> pics = wb.getAllPictures();
        if (pics.size() == 0) {
            return map;
        }
        for (Integer sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {
            Sheet sheet = wb.getSheetAt(sheetIndex);
            Drawing<?> patriarch = sheet.getDrawingPatriarch();
            if (patriarch == null) {
                continue;
            }
            if (type == 2) {
                HSSFPatriarch hssfpatriarch = (HSSFPatriarch) patriarch;
                for (HSSFShape shape : hssfpatriarch.getChildren()) {
                    HSSFClientAnchor anchor = (HSSFClientAnchor) shape.getAnchor();
                    if (shape instanceof HSSFPicture) {
                        HSSFPicture pic = (HSSFPicture) shape;
                        int picIndex = pic.getPictureIndex() - 1;
                        HSSFPictureData picData = (HSSFPictureData) pics.get(picIndex);
                        // 键格式：sheet索引_行号_列号_单元格内的上边距_单元格内的左边距_uuid
                        String key = sheetIndex + "_" + anchor.getRow1() + "_" + anchor.getCol1() + "_" + anchor.getRow2() + "_" + anchor.getCol2();
                        key += "_" + anchor.getDx1() + "_" + anchor.getDy1() + "_" + anchor.getDx2() + "_" + anchor.getDy2();
                        key += "_" + UUID.randomUUID();
                        map.put(key, picData);
                    }
                }
            } else if (type == 1) {
                XSSFSheet xssfsheet = (XSSFSheet) sheet;
                for (POIXMLDocumentPart dr : xssfsheet.getRelations()) {
                    if (dr instanceof XSSFDrawing) {
                        XSSFDrawing drawing = (XSSFDrawing) dr;
                        List<XSSFShape> shapes = drawing.getShapes();
                        for (XSSFShape shape : shapes) {
                            XSSFPicture pic = (XSSFPicture) shape;
                            XSSFPictureData data = pic.getPictureData();
                            XSSFClientAnchor aaa = pic.getClientAnchor();
                            CTMarker ccc = aaa.getFrom();
                            int ddd = ccc.getRow();
                            int eee = ccc.getCol();
//                            XSSFClientAnchor anchor = pic.getPreferredSize();
//                            CTMarker ctMarker = anchor.getFrom();
//                            String picIndex = String.valueOf(0) + "_" + ctMarker.getRow() + "_" + ctMarker.getCol();
                            String picIndex = String.valueOf(0) + "_" + ddd + "_" + eee;
                            map.put(picIndex, pic.getPictureData());
                        }
                    }
                }
            }
        }

        return map;
    }

    /**
     * 单元格是否是图片的起始位置
     *
     * @return 单元格是否是图片的起始位置
     */
    public static BaseColor parseBackgroundColor(Color hssfColor) {
        if (hssfColor == null) {
            // 白色
            return new BaseColor(255, 255, 255);
        }
        short[] rgb = new short[]{255, 255, 255};
        if (rgb[0] == 0 && rgb[1] == 0 && rgb[2] == 0) {
            rgb = new short[]{255, 255, 255};
        }
        return new BaseColor(rgb[0], rgb[1], rgb[2]);
    }

    public static PdfPCell parseImgPCell(Cell cell) {
        PdfPCell pdfpCell = new PdfPCell();
        CellStyle cellStyle = cell.getCellStyle();
        pdfpCell.setUseAscender(true);
        // 水平对齐方式
        int halign_itext = cellStyle.getAlignment().getCode();
        //int halign_itext = parseHorizontalAlignmen(halign);
        pdfpCell.setHorizontalAlignment(halign_itext);
        // 垂直对齐方式
        int valign_itext = cellStyle.getVerticalAlignment().getCode();
        // int valign_itext = parseVerticalAlignment(valign);
        pdfpCell.setVerticalAlignment(valign_itext);
        // 填充色（背景色）
        // HSSFColor backgroundColor = cellStyle.getFillBackgroundColorColor();
        Color backgroundColor = cellStyle.getFillForegroundColorColor();
        BaseColor backgroundColor_itext = parseBackgroundColor(backgroundColor);
        pdfpCell.setBackgroundColor(backgroundColor_itext);
        // 自动换行
        boolean noWrap = !cellStyle.getWrapText();
        pdfpCell.setNoWrap(noWrap);


        // 边框样式
        // 下边框
        float borderWidth = cellStyle.getBorderBottom().getCode() / 32.00f;
        //float borderWidth = borderStyle ;
        pdfpCell.setBorderWidthBottom(borderWidth);
        // 上框线
        // borderStyle = cellStyle.getBorderTop();
        pdfpCell.setBorderWidthTop(cellStyle.getBorderTop().getCode() / 32.00f);
        // 左框线
        //   borderStyle = cellStyle.getBorderLeft();
        pdfpCell.setBorderWidthLeft(cellStyle.getBorderLeft().getCode() / 32.00f);
        // 右框线
        //borderStyle = cellStyle.getBorderRight();
        pdfpCell.setBorderWidthRight(cellStyle.getBorderRight().getCode() / 32.00f);

        pdfpCell.normalize();
        // pdfpCell.disableBorderSide(9);
        return pdfpCell;
    }

    public static BaseColor parseColor(HSSFColor hssfColor) {
        if (hssfColor == null) {
            return new BaseColor(255, 255, 255);
        }
        short[] rgb = hssfColor.getTriplet();
        return new BaseColor(rgb[0], rgb[1], rgb[2]);
    }

    public static Font getFont(String fontname, int heigth, boolean bold) throws Exception {
        BaseFont font = FontGenerater.getFont(fontname);
        if (font == null) {
            font = (BaseFont) FontGenerater.FONTMAP.get(FontGenerater.FONT_SONTI_NAME);
        }

        return new Font(font, heigth, bold ? Font.BOLD : Font.NORMAL, BaseColor.BLACK);

    }
}

// 1.获取excel文件
XSSFWorkbook temp = new XSSFWorkbook("D:\\website\\tplResource\\file\\excel" + "/excel_export2.xlsx");
// 2.新建一个stream,用于绑定document
ByteArrayOutputStream stream = new ByteArrayOutputStream();
// 3.A4大小
RectangleReadOnly shuban = new RectangleReadOnly(PageSize.A4);
Document document = new Document(shuban);
// 4.获取一个pdfwriter实例
PdfWriter writer = PdfWriter.getInstance(document, stream);
// 5.打开document
document.open();
// 6.设置页边距
document.setMargins(20, 20, 30, 30);
// 7.新增页
document.newPage();
// 8.excel转pdf，并将处理后的内容添加到document中
document.add(Excel2Pdf.excelToPdf(temp, "excel_export2.xlsx", PageSize.A4.getWidth() - 150, 0));
// 9.关闭workbook document
temp.close();
document.close();
// 10.以byte[]方式获取pdf
byte[] pdfByte = stream.toByteArray();
stream.flush();
stream.reset();
stream.close();

// 11.保存pdf
String fileName = "/pdfdemo.pdf";
String filePath = "D:\\website\\tplResource\\test";
(new File(filePath)).mkdirs();
File file = new File(filePath + fileName);
if (file.exists()) {
    file.delete();
}
FileOutputStream outputStream = new FileOutputStream(filePath + fileName);
outputStream.write(pdfByte);
outputStream.close();

public class PicturesInfo {
    private int minRow;
    private int maxRow;
    private int minCol;
    private int maxCol;
    private String ext;
    private byte[] pictureData;

    public PicturesInfo(int minRow, int maxRow, int minCol, int maxCol, byte[] pictureData, String ext) {
        this.minRow = minRow;
        this.maxRow = maxRow;
        this.minCol = minCol;
        this.maxCol = maxCol;
        this.ext = ext;
        this.pictureData = pictureData;
    }

    public byte[] getPictureData() {
        return pictureData;
    }

    public void setPictureData(byte[] pictureData) {
        this.pictureData = pictureData;
    }

    public int getMinRow() {
        return minRow;
    }

    public void setMinRow(int minRow) {
        this.minRow = minRow;
    }

    public int getMaxRow() {
        return maxRow;
    }

    public void setMaxRow(int maxRow) {
        this.maxRow = maxRow;
    }

    public int getMinCol() {
        return minCol;
    }

    public void setMinCol(int minCol) {
        this.minCol = minCol;
    }

    public int getMaxCol() {
        return maxCol;
    }

    public void setMaxCol(int maxCol) {
        this.maxCol = maxCol;
    }

    public String getExt() {
        return ext;
    }

    public void setExt(String ext) {
        this.ext = ext;
    }

}

public class POIExtend {

    public static List<PicturesInfo> getAllPictureInfos(Sheet sheet, boolean onlyInternal) throws Exception {
        return getAllPictureInfos(sheet, null, null, null, null, onlyInternal);
    }

    public static List<PicturesInfo> getAllPictureInfos(Sheet sheet, Integer minRow, Integer maxRow, Integer minCol,
                                                        Integer maxCol, boolean onlyInternal) throws Exception {
        if (sheet instanceof HSSFSheet) {
            return getXLSAllPictureInfos((HSSFSheet) sheet, minRow, maxRow, minCol, maxCol, onlyInternal);
        } else if (sheet instanceof XSSFSheet) {
            return getXLSXAllPictureInfos((XSSFSheet) sheet, minRow, maxRow, minCol, maxCol, onlyInternal);
        } else {
            throw new Exception("未处理类型，没有为该类型添加：GetAllPicturesInfos()扩展方法！");
        }
    }

    private static List<PicturesInfo> getXLSAllPictureInfos(HSSFSheet sheet, Integer minRow, Integer maxRow,
                                                            Integer minCol, Integer maxCol, Boolean onlyInternal) {
        List<PicturesInfo> picturesInfoList = new ArrayList<>();

        HSSFShapeContainer shapeContainer = sheet.getDrawingPatriarch();
        if (null != shapeContainer) {
            List<HSSFShape> shapeList = shapeContainer.getChildren();
            for (HSSFShape shape : shapeList) {
                if (shape instanceof HSSFPicture && shape.getAnchor() instanceof HSSFClientAnchor) {
                    HSSFPicture picture = (HSSFPicture) shape;
                    HSSFClientAnchor anchor = (HSSFClientAnchor) shape.getAnchor();

                    if (isInternalOrIntersect(minRow, maxRow, minCol, maxCol, anchor.getRow1(), anchor.getRow2(),
                            anchor.getCol1(), anchor.getCol2(), onlyInternal)) {
                        picturesInfoList.add(
                                new PicturesInfo(anchor.getRow1(), anchor.getRow2(), anchor.getCol1(), anchor.getCol2(),
                                        picture.getPictureData().getData(), picture.getPictureData().getMimeType()));
                    }
                }
            }
        }

        return picturesInfoList;
    }

    private static List<PicturesInfo> getXLSXAllPictureInfos(XSSFSheet sheet, Integer minRow, Integer maxRow,
                                                             Integer minCol, Integer maxCol, Boolean onlyInternal) {
        List<PicturesInfo> picturesInfoList = new ArrayList<>();

        List<POIXMLDocumentPart> documentPartList = sheet.getRelations();
        for (POIXMLDocumentPart documentPart : documentPartList) {
            if (documentPart instanceof XSSFDrawing) {
                XSSFDrawing drawing = (XSSFDrawing) documentPart;
                List<XSSFShape> shapes = drawing.getShapes();
                for (XSSFShape shape : shapes) {
                    if (shape instanceof XSSFPicture) {
                        XSSFPicture picture = (XSSFPicture) shape;
                        // XSSFClientAnchor anchor = picture.getPreferredSize();
                        XSSFClientAnchor anchor = picture.getClientAnchor();
                        if (isInternalOrIntersect(minRow, maxRow, minCol, maxCol, anchor.getRow1(), anchor.getRow2(),
                                anchor.getCol1(), anchor.getCol2(), onlyInternal)) {
                            picturesInfoList.add(new PicturesInfo(anchor.getRow1(), anchor.getRow2(), anchor.getCol1(),
                                    anchor.getCol2(), picture.getPictureData().getData(),
                                    picture.getPictureData().getMimeType()));
                        }
                    }
                }
            }
        }

        return picturesInfoList;
    }

    private static boolean isInternalOrIntersect(Integer rangeMinRow, Integer rangeMaxRow, Integer rangeMinCol,
                                                 Integer rangeMaxCol, int pictureMinRow, int pictureMaxRow, int pictureMinCol, int pictureMaxCol,
                                                 Boolean onlyInternal) {
        int _rangeMinRow = rangeMinRow == null ? pictureMinRow : rangeMinRow;
        int _rangeMaxRow = rangeMaxRow == null ? pictureMaxRow : rangeMaxRow;
        int _rangeMinCol = rangeMinCol == null ? pictureMinCol : rangeMinCol;
        int _rangeMaxCol = rangeMaxCol == null ? pictureMaxCol : rangeMaxCol;

        if (onlyInternal) {
            return (_rangeMinRow <= pictureMinRow && _rangeMaxRow >= pictureMaxRow && _rangeMinCol <= pictureMinCol
                    && _rangeMaxCol >= pictureMaxCol);
        } else {
            return ((Math.abs(_rangeMaxRow - _rangeMinRow) + Math.abs(pictureMaxRow - pictureMinRow) >= Math
                    .abs(_rangeMaxRow + _rangeMinRow - pictureMaxRow - pictureMinRow))
                    && (Math.abs(_rangeMaxCol - _rangeMinCol) + Math.abs(pictureMaxCol - pictureMinCol) >= Math
                    .abs(_rangeMaxCol + _rangeMinCol - pictureMaxCol - pictureMinCol)));
        }
    }
}