导出pdf 加密、加水印、加页脚

1.依赖

<dependency>

<groupId>com.itextpdf</groupId>

<artifactId>itextpdf</artifactId>

<version>5.5.10</version>

</dependency>

<dependency>

<groupId>com.itextpdf</groupId>

<artifactId>itext-asian</artifactId>

<version>5.2.0</version>

</dependency>

<dependency>

<groupId>org.bouncycastle</groupId>

<artifactId>bcprov-jdk15on</artifactId>

<version>1.65</version>

</dependency>

2.工具类

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import lombok.SneakyThrows;

import java.io.IOException;

public class PdfPageSongTiUtil extends PdfPageEventHelper {

    /**
     * 文档字体大小，页脚页眉最好和文本大小一致
     */
    public int presentFontSize = 10;

    /**
     * 文档页面大小，最好前面传入，否则默认为A4纸张
     */
    public Rectangle pageSize = PageSize.A4;

    // 模板
    public PdfTemplate total;

    // 基础字体对象
    public BaseFont bf = null;

    // 利用基础字体生成的字体对象，一般用于生成中文文字
    public Font fontDetail = null;

    /**
     *
     *  无参构造方法.
     *
     */
    public PdfPageSongTiUtil() {

    }

  
    public PdfPageSongTiUtil(int presentFontSize, Rectangle pageSize) {
        this.presentFontSize = presentFontSize;
        this.pageSize = pageSize;
    }

    public void setPresentFontSize(int presentFontSize) {
        this.presentFontSize = presentFontSize;
    }

    /**
     *
     * 文档打开时创建模板
     */
    @Override
    public void onOpenDocument(PdfWriter writer, Document document) {
    	// 共 页 的矩形的长宽高
        total = writer.getDirectContent().createTemplate(50, 50);
    }

    /**
     *
     *关闭每页的时候，写入页眉
     */
    @SneakyThrows
    @Override
    public void onEndPage(PdfWriter writer, Document document) {
        this.addPage(writer, document);
    }

    //加分页
    public void addPage(PdfWriter writer, Document document) throws IOException, DocumentException {
        //设置分页页眉页脚字体
        try {
            if (bf == null) {
                bf = BaseFont.createFont("template/GB2312.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            }
            if (fontDetail == null) {
                fontDetail = new Font(bf, presentFontSize, Font.NORMAL);// 数据体字体
            }
        } catch (DocumentException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 1.写入页眉
//        ColumnText.showTextAligned(writer.getDirectContent(),
//                Element.ALIGN_LEFT, new Phrase(header, fontDetail),
//                document.left(), document.top() + 20, 0);
        // 2.写入前半部分的 第 X页/共
        Phrase footer = new Phrase("来源：中学生统一服务平台", fontDetail);

        // 4.拿到当前的PdfContentByte
        PdfContentByte cb = writer.getDirectContent();

        // 5.写入页脚1，x轴就是(右margin+左margin + right() -left()- len)/2.0F
        ColumnText
                .showTextAligned(
                        cb,
                        Element.ALIGN_CENTER,
                        footer,
                        document.right()-document.rightMargin()-5 ,
                        document.bottom() - 10, 0);
        // 调节模版显示的位置


        //加水印
        addWatermark(writer);

    }


    /**
     *
     * 关闭文档时，替换模板，完成整个页眉页脚组件
     */
    @Override
    public void onCloseDocument(PdfWriter writer, Document document) {
        // 关闭文档的时候，将模板替换成实际的 Y 值
        total.beginText();
        // 生成的模版的字体、颜色
        total.setFontAndSize(bf, presentFontSize);
        //页脚内容拼接  如  第1页/共2页
        //String foot2 = " " + (writer.getPageNumber()) + " 页";
        //页脚内容拼接  如  第1页/共2页
        String foot2 = String.valueOf(writer.getPageNumber());
        // 模版显示的内容
        total.showText(foot2);
        total.endText();
        total.closePath();
    }




    // 加水印
    public void addWatermark(PdfWriter writer) throws IOException, DocumentException {

            PdfContentByte waterMar = writer.getDirectContentUnder();
            String text="全国中学生会议";
            waterMar.beginText();
            PdfGState gs=new PdfGState();
            //透明度
            gs.setFillOpacity(0.2F);
            waterMar.setFontAndSize(BaseFont.createFont("template/GB2312.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED),12);
            waterMar.setGState(gs);
            for (int x = 0; x <=800; x+=200) {
                for (int y = 0; y < 800; y+=100) {
                    //水印对齐方式 水印内容 x坐标 y坐标 旋转角度
                    waterMar.showTextAligned(Element.ALIGN_RIGHT,text,x,y,35);
                }
            }
            waterMar.setColorFill(BaseColor.GRAY);
            waterMar.endText();
            waterMar.stroke();
        }





}

3.实体类

@Data
public class PersonnelInfo {
	private String name;

	private String phoneNumber;

	private String sex;

	private String schoolName;

	private String workerPosition;

	private String workerDate;

	private String certificate;

	private String OtherCertificate;


}

4. 例子

    @GetMapping(value = "/createFilePdf", produces = MediaType.APPLICATION_JSON_VALUE)
    public void createFilePdf(HttpServletRequest request, HttpServletResponse response) throws IOException, DocumentException {
        request.getSession();
        response.setContentType("application/pdf;charset=UTF-8");
        response.setCharacterEncoding("utf-8");
        String fileName =URLEncoder.encode( "导出pdf人员登记表","UTF-8");
        response.setHeader("Content-Disposition", "attachment;filename*=utf-8''" + fileName+".pdf");

        List<PersonnelInfo> list=new ArrayList<>();
        PersonnelInfo personnel=new PersonnelInfo();
        personnel.setName("张三");
        personnel.setSex("男");
        personnel.setPhoneNumber("1101001001");
        personnel.setSchoolName("清华附中");
        personnel.setWorkerPosition("北京");
        personnel.setWorkerDate("1999-12-12");
        personnel.setCertificate("特级数学老师");
        personnel.setOtherCertificate("二级心理咨询");
        list.add(personnel);


        // 定义全局的字体静态变量
        Font content = null;
        Font fontHead = null;
        try {
            // 不同字体（这里定义同一种字体：包含不同字号、不同style）
            BaseFont bfChinese = BaseFont.createFont("template/GB2312.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            content = new Font(bfChinese, 11, Font.NORMAL);
            //使用字体并给出颜色
            fontHead = new Font(bfChinese,20,Font.BOLD,BaseColor.BLACK);

        } catch (Exception e) {
            e.printStackTrace();
        }


        Document document=new Document(new RectangleReadOnly(850F,590F));
        document.setMargins(50,50,45,45);

        PdfWriter writer = PdfWriter.getInstance(document, response.getOutputStream());
        //用户密码  保证不能修改 设置所有者密码即可
        String pwdUser="";
        //所有者密码
        String pwdOwn="18956723.";
        writer.setEncryption("".getBytes(),pwdOwn.getBytes(),PdfWriter.ALLOW_PRINTING,PdfWriter.ENCRYPTION_AES_128);
        //添加页脚、水印等
        PdfPageSongTiUtil myHeadFooter=new PdfPageSongTiUtil();
        writer.setPageEvent(myHeadFooter);
        //open
        document.open();

        Paragraph paragraphHead1=new Paragraph("人员信息列表",fontHead);
        paragraphHead1.setAlignment(Element.ALIGN_CENTER);
        document.add(paragraphHead1);
        document.add(new Paragraph("\n"));

        PdfPCell cellBg[]=new PdfPCell[2];
        float[] width={35f,30f};
        //创建表格
        PdfPTable table=new PdfPTable(width);
        table.setWidthPercentage(100.0f);

        //表格顶端文本
        PdfPCell celltTableTop[]=new PdfPCell[2];
        float[] widthTop={55f,15f};
        PdfPTable tableTop=new PdfPTable(widthTop);
        tableTop.setWidthPercentage(100.0f);
        celltTableTop[0]=new PdfPCell(new Paragraph("会议开班负责人（签字）：",content));
        celltTableTop[0].setBorder(0);
        tableTop.addCell(celltTableTop[0]);
        celltTableTop[1]=new PdfPCell(new Paragraph("日期：",content));
        celltTableTop[1].setBorder(0);
        tableTop.addCell(celltTableTop[1]);
        document.add(tableTop);

        //数据列
        PdfPCell cell=null;
        //11列  人员表头
        float[] width2={10f,15f,10f,20f,25f,25f,25f,25f,25f};
        PdfPTable tabl2=new PdfPTable(width2);
        PdfPTableHeader pdfPTableHeader=new PdfPTableHeader();
        tabl2.setSpacingBefore(5f);
        tabl2.setWidthPercentage(100.0f);
        //表头  换页显示
        tabl2.setHeaderRows(1);
        tabl2.getDefaultCell().setHorizontalAlignment(1);

        List<String> listTitle=Arrays.asList("序号","姓名","性别","联系方式","工作地点","工作岗位","入职日期","教学相关资格证书","其他相关资质证书");
        for (String title : listTitle) {
            tabl2.addCell(createCell(title,content));
        }

        int   index=0;
        for (PersonnelInfo personnelInfo : list) {
            index++;
            PdfPCell cel1=new PdfPCell(new Paragraph(String.valueOf(index),content));
            PdfPCell cel2=new PdfPCell(new Paragraph(personnelInfo.getName(),content));
            PdfPCell cel3=new PdfPCell(new Paragraph(personnelInfo.getSex(),content));
            PdfPCell cel4=new PdfPCell(new Paragraph(personnelInfo.getPhoneNumber(),content));
            PdfPCell cel5=new PdfPCell(new Paragraph(personnelInfo.getSchoolName(),content));
            PdfPCell cel6=new PdfPCell(new Paragraph(personnelInfo.getWorkerPosition(),content));
            PdfPCell cel7=new PdfPCell(new Paragraph(personnelInfo.getWorkerDate(),content));
            PdfPCell cel8=new PdfPCell(new Paragraph(personnelInfo.getCertificate(),content));
            PdfPCell cel9=new PdfPCell(new Paragraph(personnelInfo.getOtherCertificate(),content));
            cel1.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel1.setHorizontalAlignment(Element.ALIGN_CENTER);

            cel2.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel2.setHorizontalAlignment(Element.ALIGN_CENTER);

            cel3.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel3.setHorizontalAlignment(Element.ALIGN_CENTER);

            cel4.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel4.setHorizontalAlignment(Element.ALIGN_CENTER);

            cel5.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel5.setHorizontalAlignment(Element.ALIGN_CENTER);

            cel6.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel6.setHorizontalAlignment(Element.ALIGN_CENTER);

            cel7.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel7.setHorizontalAlignment(Element.ALIGN_CENTER);

            cel8.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel8.setHorizontalAlignment(Element.ALIGN_CENTER);

            cel9.setVerticalAlignment(Element.ALIGN_MIDDLE);
            cel9.setHorizontalAlignment(Element.ALIGN_CENTER);
            tabl2.addCell(cel1);
            tabl2.addCell(cel2);
            tabl2.addCell(cel3);
            tabl2.addCell(cel4);
            tabl2.addCell(cel5);
            tabl2.addCell(cel6);
            tabl2.addCell(cel7);
            tabl2.addCell(cel8);
            tabl2.addCell(cel9);

        }
        document.add(tabl2);


        Paragraph paragraphEnd1=new Paragraph("会议结束负责人签字：",content);
        paragraphEnd1.setIndentationLeft(460);
        paragraphEnd1.setSpacingBefore(10f);
        document.add(paragraphEnd1);

        //close
        document.close();

    }



 /**
     *
     * @param cont  表头
     * @param font  字体
     * @return
     */
   static  PdfPCell createCell(String cont,Font font){
       PdfPCell cell=new PdfPCell(new Paragraph(cont,font));
       cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
       cell.setHorizontalAlignment(Element.ALIGN_CENTER);
       cell.setFixedHeight(30);
       cell.setBackgroundColor(new BaseColor(153,203,255));
       return cell;

    }