JavaWeb項目生成PDF文件添加水印圖片並導出

時間 2019-12-13

標籤 javaweb 項目生成 pdf 文件添加水印圖片導出欄目 Java 简体版

原文原文鏈接

1、前言java

首先須要在Maven中添加相應的jar包依賴，若項目沒用到Maven，也可自行下載相應所需的jar包（itextpdf.jar 與 itext-asian.jar），以下圖所示。點此下載api

Maven中添加依賴jar包以下所示：服務器

 1 <!-- pdf start -->
 2 <dependency>
 3     <groupId>com.itextpdf</groupId>
 4     <artifactId>itextpdf</artifactId>
 5     <version>5.3.2</version>
 6 </dependency>
 7 <dependency>
 8     <groupId>com.itextpdf</groupId>
 9     <artifactId>itext-asian</artifactId>
10     <version>5.2.0</version>
11 </dependency>
12 <!-- pdf end -->

2、正文app

一、首先獲取須要填寫至PDF中的數據，以下述所示，realPath爲添加圖片的路徑，test.pdf爲未添加圖片的PDF臨時文件，在Tomcat服務器對應路徑下，以及導出的PDF文件存至桌面：函數

 1 //點擊下載獲取企業信息並存至Pdf
 2 @RequestMapping(value="/downloadPdf.do")
 3 @ResponseBody
 4 public String downloadPdf(@RequestParam(value = "download_corp_id") String download_corp_id, HttpServletRequest request) throws Exception {
 5     List<TCorp> corpIfs = searchCorpService.getCorpInfo(Integer.parseInt(download_corp_id));
 6     TCorp tCorp = new TCorp();
 7     for (TCorp corpInfo: corpIfs){
 8         tCorp.setId(corpInfo.getId());
 9         tCorp.setRegNo(corpInfo.getRegNo());
10         tCorp.setCorpName(corpInfo.getCorpName());
11         tCorp.setCorpAddr(corpInfo.getCorpAddr());
12         tCorp.setBelongOrg(corpInfo.getBelongOrg());
13         tCorp.setBelongDistOrg(corpInfo.getBelongDistOrg());
14         tCorp.setBelongTrade(corpInfo.getBelongTrade());
15         tCorp.setEconKind(corpInfo.getEconKind());
16         tCorp.setAdmitMain(corpInfo.getAdmitMain());
17         tCorp.setStartDate(corpInfo.getStartDate());
18         tCorp.setCheckDate(corpInfo.getCheckDate());
19         tCorp.setOperManIdentNo(corpInfo.getOperManIdentNo());
20         tCorp.setOperManName(corpInfo.getOperManName());
21         tCorp.setCorpStatus(corpInfo.getCorpStatus());
22         tCorp.setRegCapi(corpInfo.getRegCapi());
23         tCorp.setPaidCapi(corpInfo.getPaidCapi());
24         tCorp.setFareTermStart(corpInfo.getFareTermStart());
25         tCorp.setFareTermEnd(corpInfo.getFareTermEnd());
26         tCorp.setFareScope(corpInfo.getFareScope());
27         tCorp.setUniScid(corpInfo.getUniScid());
28         tCorp.setCorpTel(corpInfo.getCorpTel());
29         tCorp.setCorpWebUrl(corpInfo.getCorpWebUrl());
30         tCorp.setCorpLogo(corpInfo.getCorpLogo());
31         tCorp.setCorpEmail(corpInfo.getCorpEmail());
32         tCorp.setPracPersonNum(corpInfo.getPracPersonNum());
33         tCorp.setOrgInstCode(corpInfo.getOrgInstCode());
34         tCorp.setTaxpayNum(corpInfo.getTaxpayNum());
35         tCorp.setStaffSize(corpInfo.getStaffSize());
36         tCorp.setEnglishName(corpInfo.getEnglishName());
37         tCorp.setFormerName(corpInfo.getFormerName());
38         tCorp.setCorpInfo(corpInfo.getCorpInfo());
39         tCorp.setCreateDate(corpInfo.getCreateDate());
40         tCorp.setCreateOrg(corpInfo.getCreateOrg());
41     }
42 
43     String realPath = request.getSession().getServletContext().getRealPath("/") + "\\icon\\logo_64.png";
44     PDFReport.settCorp(tCorp);
45     new PDFReport("test.pdf").generatePDF();
46     PDFUtil.addImage("test.pdf", "C:\\Users\\Administrator\\Desktop\\"+tCorp.getCorpName()+".pdf",realPath);
47 
48     return "提示：數據導出成功!";
49 }

二、PDFReport類中申明一個文檔類型創建Document對象，設置頁面樣式等：學習

  1 package util;
  2 
  3 import com.itextpdf.text.Document;
  4 import com.itextpdf.text.PageSize;
  5 import com.itextpdf.text.Rectangle;
  6 import com.itextpdf.text.pdf.PdfPTable;
  7 import com.itextpdf.text.pdf.PdfWriter;
  8 import entity.TCorp;
  9 
 10 import java.io.File;
 11 import java.io.FileOutputStream;
 12 
 13 public class PDFReport {
 14     private static TCorp tCorp;
 15 
 16     Document document = new Document();// 創建一個Document對象
 17 
 18     public PDFReport(String out) {
 19         try {
 20             File file = new File(out);
 21             file.createNewFile();
 22             Rectangle pageSize = new Rectangle(PageSize.A4);
 23             document.setPageSize(pageSize);
 24             PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));
 25             PDFBuilder builder = new PDFBuilder();
 26             writer.setPageEvent(builder);
 27             document.open();
 28             PdfPTable table = generatePDF();
 29             document.add(table);
 30             document.close();
 31         } catch (Exception e) {
 32             e.printStackTrace();
 33         }
 34     }
 35 
 36     public static void settCorp(TCorp tCorp) {
 37         PDFReport.tCorp = tCorp;
 38     }
 39 
 40 
 41     public PdfPTable generatePDF() {
 42         //設置單元格爲5列
 43         PdfPTable table = PDFUtil.createTable(5);
 44 
 45         table.addCell(PDFUtil.createHeadCell("企業信息列表"));
 46         table.addCell(PDFUtil.createTitleCell_1("企業名稱"));
 47         table.addCell(PDFUtil.createCell_1(tCorp.getCorpName()));
 48         table.addCell(PDFUtil.createTitleCell_1("聯繫方式"));
 49         table.addCell(PDFUtil.createCell_1(tCorp.getCorpTel()));
 50         table.addCell(PDFUtil.createCell_2("Logo"));
 51 
 52         table.addCell(PDFUtil.createTitleCell_1("企業郵箱"));
 53         table.addCell(PDFUtil.createCell_1(tCorp.getCorpEmail()));
 54         table.addCell(PDFUtil.createTitleCell_1("網址"));
 55         table.addCell(PDFUtil.createCell_1(tCorp.getCorpWebUrl()));
 56 
 57         table.addCell(PDFUtil.createTitleCell_1("企業地址"));
 58         table.addCell(PDFUtil.createCell_1(tCorp.getCorpAddr()));
 59         table.addCell(PDFUtil.createTitleCell_1("註冊/實繳"));
 60         table.addCell(PDFUtil.createCell_1(String.valueOf(tCorp.getRegCapi())+"萬 / "+String.valueOf(tCorp.getPaidCapi())+"萬"));
 61 
 62         table.addCell(PDFUtil.createTitleCell_1("成立日期"));
 63         table.addCell(PDFUtil.createCell_1(tCorp.getStartDate()));
 64         table.addCell(PDFUtil.createTitleCell_1("統一社會信用代碼"));
 65         table.addCell(PDFUtil.createCell_3(tCorp.getUniScid()));
 66 
 67         table.addCell(PDFUtil.createTitleCell_1("法定表明人"));
 68         table.addCell(PDFUtil.createCell_1(tCorp.getOperManName()));
 69         table.addCell(PDFUtil.createTitleCell_1("納稅人識別號"));
 70         table.addCell(PDFUtil.createCell_3(tCorp.getTaxpayNum()));
 71 
 72         table.addCell(PDFUtil.createTitleCell_1("註冊號"));
 73         table.addCell(PDFUtil.createCell_1(tCorp.getRegNo()));
 74         table.addCell(PDFUtil.createTitleCell_1("組織機構代碼"));
 75         table.addCell(PDFUtil.createCell_3(tCorp.getOrgInstCode()));
 76 
 77         table.addCell(PDFUtil.createTitleCell_1("公司類型"));
 78         table.addCell(PDFUtil.createCell_1(tCorp.getEconKind()));
 79         table.addCell(PDFUtil.createTitleCell_1("人員規模"));
 80         table.addCell(PDFUtil.createCell_3(tCorp.getStaffSize()));
 81 
 82         table.addCell(PDFUtil.createTitleCell_1("營業期限"));
 83         table.addCell(PDFUtil.createCell_1(tCorp.getFareTermStart()+" 至 "+tCorp.getFareTermEnd()));
 84         table.addCell(PDFUtil.createTitleCell_1("登記機關"));
 85         table.addCell(PDFUtil.createCell_3(tCorp.getBelongOrg()));
 86 
 87         table.addCell(PDFUtil.createTitleCell_1("覈准日期"));
 88         table.addCell(PDFUtil.createCell_1(tCorp.getCheckDate()));
 89         table.addCell(PDFUtil.createTitleCell_1("所屬行業"));
 90         table.addCell(PDFUtil.createCell_3(tCorp.getBelongTrade()));
 91 
 92         table.addCell(PDFUtil.createTitleCell_1("英文名稱"));
 93         table.addCell(PDFUtil.createCell_1(tCorp.getEnglishName()));
 94         table.addCell(PDFUtil.createTitleCell_1("曾用名"));
 95         table.addCell(PDFUtil.createCell_3(tCorp.getFormerName()));
 96 
 97         table.addCell(PDFUtil.createTitleCell_2("經營範圍"));
 98         table.addCell(PDFUtil.createCell_4(tCorp.getFareScope()));
 99 
100         return table;
101     }
102 }

三、PDFUtil類中設置字體、表格樣式、以及水印文字樣式，setColspan函數爲設置所跨列數，setRowspan函數爲設置所跨行數：測試

  1 package util;
  2 
  3 import com.itextpdf.text.*;
  4 import com.itextpdf.text.pdf.*;
  5 
  6 import javax.imageio.ImageIO;
  7 import java.io.BufferedOutputStream;
  8 import java.io.File;
  9 import java.io.FileOutputStream;
 10 
 11 public class PDFUtil {
 12     private static Font headfont ; // 設置字體大小
 13     private static Font keyfont;   // 設置字體大小
 14     private static Font textfont;  // 設置字體大小
 15 
 16     static{
 17         BaseFont bfChinese;
 18         try {
 19             bfChinese = BaseFont.createFont("STSong-Light","UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);
 20             headfont = new Font(bfChinese, 24, Font.BOLD,BaseColor.BLACK);// 設置字體大小
 21             keyfont = new Font(bfChinese, 12, Font.BOLD,BaseColor.BLACK);// 設置字體大小
 22             textfont = new Font(bfChinese, 10, Font.NORMAL,BaseColor.BLACK);// 設置字體大小
 23         } catch (Exception e) {
 24             e.printStackTrace();
 25         }
 26     }
 27 
 28     //表格標題
 29     public static PdfPCell createHeadCell(String value){
 30         PdfPCell cell = new PdfPCell();
 31         cell.setVerticalAlignment(15);
 32         cell.setHorizontalAlignment(15);
 33         cell.setColspan(5);
 34         cell.setPhrase(new Phrase(value,headfont));
 35         cell.setHorizontalAlignment(Element.ALIGN_CENTER); //水平居中
 36         cell.setPadding(10.0f);
 37         cell.setBorder(0);
 38         cell.setPaddingTop(5.0f);
 39         cell.setPaddingBottom(18.0f);
 40         return cell;
 41     }
 42 
 43     //表格表頭樣式1
 44     public static  PdfPCell createTitleCell_1(String value){
 45         PdfPCell cell = new PdfPCell();
 46         cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
 47         cell.setHorizontalAlignment(Element.ALIGN_CENTER);
 48         cell.setPhrase(new Phrase(value, keyfont));
 49         cell.setBackgroundColor(new BaseColor(29, 181, 238));
 50         cell.setColspan(1);
 51         cell.setFixedHeight(35);
 52         return cell;
 53     }
 54 
 55     //表格表頭樣式2
 56     public static  PdfPCell createTitleCell_2(String value){
 57         PdfPCell cell = new PdfPCell();
 58         cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
 59         cell.setHorizontalAlignment(Element.ALIGN_CENTER);
 60         cell.setPhrase(new Phrase(value, keyfont));
 61         cell.setBackgroundColor(new BaseColor(29, 181, 238));
 62         cell.setColspan(1);
 63         cell.setRowspan(3);
 64         cell.setFixedHeight(105);
 65         return cell;
 66     }
 67 
 68     //表格內容樣式1
 69     public static PdfPCell createCell_1(String value){
 70         PdfPCell cell = new PdfPCell();
 71         cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
 72         cell.setHorizontalAlignment(Element.ALIGN_CENTER);
 73         cell.setPhrase(new Phrase(value,textfont));
 74         cell.setBackgroundColor(new BaseColor(255, 255, 255));
 75         cell.setColspan(1);
 76         cell.setFixedHeight(35);
 77         return cell;
 78     }
 79 
 80     //表格內容樣式2
 81     public static PdfPCell createCell_2(String value){
 82         PdfPCell cell = new PdfPCell();
 83         cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
 84         cell.setHorizontalAlignment(Element.ALIGN_CENTER);
 85         cell.setPhrase(new Phrase(value,textfont));
 86         cell.setBackgroundColor(new BaseColor(255, 255, 255));
 87         cell.setColspan(1);
 88         cell.setRowspan(3);
 89         cell.setFixedHeight(105);
 90         return cell;
 91     }
 92 
 93     //表格內容樣式3
 94     public static PdfPCell createCell_3(String value){
 95         PdfPCell cell = new PdfPCell();
 96         cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
 97         cell.setHorizontalAlignment(Element.ALIGN_CENTER);
 98         cell.setPhrase(new Phrase(value,textfont));
 99         cell.setBackgroundColor(new BaseColor(255, 255, 255));
100         cell.setColspan(2);
101         cell.setFixedHeight(35);
102         return cell;
103     }
104 
105     //表格內容樣式4
106     public static PdfPCell createCell_4(String value){
107         PdfPCell cell = new PdfPCell();
108         cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
109         cell.setHorizontalAlignment(Element.ALIGN_CENTER);
110         cell.setPhrase(new Phrase(value,textfont));
111         cell.setBackgroundColor(new BaseColor(255, 255, 255));
112         cell.setColspan(4);
113         cell.setRowspan(3);
114         cell.setFixedHeight(105);
115         return cell;
116     }
117 
118     //生成表格
119     public static PdfPTable createTable(int colNumber){
120         int widths[] = { 35,40,35,35,30 };
121         PdfPTable baseTable  = new PdfPTable(colNumber);
122         baseTable.setWidthPercentage(100);
123         baseTable.setSpacingBefore(10);
124         try {
125             baseTable.setWidths(widths);
126         } catch (DocumentException e) {
127             e.printStackTrace();
128         }
129         return baseTable;
130     }
131 
132 
133     public static  void addImage(String input,String output,String realPath) throws Exception{
134         BufferedOutputStream out = new BufferedOutputStream(
135                 new FileOutputStream(new File(output)));
136         PdfReader reader = new PdfReader(input);
137         PdfStamper stamper = new PdfStamper(reader, out);
138         addWatermark(stamper,"測試添加水印文字");
139         int total = reader.getNumberOfPages();
140         try {
141             Image image = Image.getInstance(realPath);
142             image.setAbsolutePosition(350, 200);
143             image.scaleToFit(160, 70);
144             PdfContentByte content= stamper.getOverContent(total);// 在內容上方加水印
145             content.addImage(image);
146         }catch (Exception e){
147             e.printStackTrace();
148         }
149 
150         stamper.close();
151         reader.close();
152     }
153 
154     public static void addWatermark(PdfStamper pdfStamper, String waterMarkName) throws Exception {
155         PdfContentByte content;
156         BaseFont base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",
157                 BaseFont.NOT_EMBEDDED);
158         Rectangle pageRect;
159         PdfGState gs = new PdfGState();
160         try {
161             if (base == null || pdfStamper == null) {
162                 return;
163             }
164             // 設置透明度爲0.4
165             gs.setFillOpacity(0.3f);
166             gs.setStrokeOpacity(0.3f);
167             int toPage = pdfStamper.getReader().getNumberOfPages();
168             for (int i = 1; i <= toPage; i++) {
169                 pageRect = pdfStamper.getReader().getPageSizeWithRotation(i);
170                 // 計算水印X,Y座標
171                 float x = pageRect.getWidth() / 2;
172                 float y = pageRect.getHeight() / 2;
173                 // 得到PDF最頂層
174                 content = pdfStamper.getOverContent(i);
175                 content.saveState();
176                 // set Transparency
177                 content.setGState(gs);
178                 content.beginText();
179                 content.setColorFill(BaseColor.GRAY);
180                 content.setFontAndSize(base, 30);
181                 // 水印文字成45度角傾斜
182                 content.showTextAligned(Element.ALIGN_CENTER, waterMarkName, x,
183                         y, 45);
184                 content.endText();
185             }
186         } catch (Exception ex) {
187             ex.printStackTrace();
188         }
189     }
190 }

四、PDFBuilder類中爲設置頁面附加屬性：字體

  1 package util;
  2 
  3 import com.itextpdf.text.*;
  4 import com.itextpdf.text.pdf.*;
  5 
  6 import java.io.IOException;
  7 
  8 public class PDFBuilder extends PdfPageEventHelper {
  9     /**
 10      * 頁眉
 11      */
 12     public String header = "";
 13 
 14     /**
 15      * 文檔字體大小，頁腳頁眉最好和文本大小一致
 16      */
 17     public int presentFontSize = 12;
 18 
 19 
 20     // 模板
 21     public PdfTemplate total;
 22 
 23     // 基礎字體對象
 24     public BaseFont bf = null;
 25 
 26     // 利用基礎字體生成的字體對象，通常用於生成中文文字
 27     public Font fontDetail = null;
 28 
 29     /**
 30      *
 31      * Creates a new instance of PdfReportM1HeaderFooter 無參構造方法.
 32      *
 33      */
 34     public PDFBuilder() {
 35 
 36     }
 37 
 38     public void setHeader(String header) {
 39         this.header = header;
 40     }
 41 
 42     /**
 43      *
 44      * TODO 文檔打開時建立模板
 45      *
 46      * @see com.itextpdf.text.pdf.PdfPageEventHelper#onOpenDocument(com.itextpdf.text.pdf.PdfWriter,
 47      *      com.itextpdf.text.Document)
 48      */
 49     public void onOpenDocument(PdfWriter writer, Document document) {
 50         total = writer.getDirectContent().createTemplate(50, 50);// 共 頁 的矩形的長寬高
 51     }
 52 
 53     /**
 54      *
 55      * TODO 關閉每頁的時候，寫入頁眉，寫入'第幾頁共'這幾個字。
 56      *
 57      * @see com.itextpdf.text.pdf.PdfPageEventHelper#onEndPage(com.itextpdf.text.pdf.PdfWriter,
 58      *      com.itextpdf.text.Document)
 59      */
 60     public void onEndPage(PdfWriter writer, Document document) {
 61         this.addPage(writer, document);
 62     }
 63 
 64     //加分頁
 65     public void addPage(PdfWriter writer, Document document){
 66         try {
 67             if (bf == null) {
 68                 bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", false);
 69             }
 70             if (fontDetail == null) {
 71                 fontDetail = new Font(bf, presentFontSize, Font.NORMAL);// 數據體字體
 72             }
 73         } catch (DocumentException e) {
 74             e.printStackTrace();
 75         } catch (IOException e) {
 76             e.printStackTrace();
 77         }
 78 
 79         // 1.寫入頁眉
 80         ColumnText.showTextAligned(writer.getDirectContent(),
 81                 Element.ALIGN_LEFT, new Phrase(header, fontDetail),
 82                 document.left(), document.top() + 20, 0);
 83         // 2.寫入前半部分的 第 X頁/共
 84         int pageS = writer.getPageNumber();
 85         String foot1 = "第 " + pageS + " 頁 / 共";
 86         Phrase footer = new Phrase(foot1, fontDetail);
 87 
 88         // 3.計算前半部分的foot1的長度，後面好定位最後一部分的'Y頁'這倆字的x軸座標，字體長度也要計算進去 = len
 89         float len = bf.getWidthPoint(foot1, presentFontSize);
 90 
 91         // 4.拿到當前的PdfContentByte
 92         PdfContentByte cb = writer.getDirectContent();
 93 
 94         // 5.寫入頁腳1，x軸就是(右margin+左margin + right() -left()- len)/2.0F
 95         // 再給偏移20F適合人類視覺感覺，不然肉眼看上去就太偏左了
 96         // ,y軸就是底邊界-20,不然就貼邊重疊到數據體裏了就不是頁腳了；注意Y軸是從下往上累加的，最上方的Top值是大於Bottom好幾百開外的。
 97         ColumnText
 98                 .showTextAligned(
 99                         cb,
100                         Element.ALIGN_CENTER,
101                         footer,
102                         (document.rightMargin() + document.right()
103                                 + document.leftMargin() - document.left() - len) / 2.0F + 20F,
104                         document.bottom() - 20, 0);
105 
106         // 6.寫入頁腳2的模板（就是頁腳的Y頁這倆字）添加到文檔中，計算模板的和Y軸,X=(右邊界-左邊界 - 前半部分的len值)/2.0F +
107         // len ， y 軸和以前的保持一致，底邊界-20
108         cb.addTemplate(total, (document.rightMargin() + document.right()
109                         + document.leftMargin() - document.left()) / 2.0F + 20F,
110                 document.bottom() - 20); // 調節模版顯示的位置
111 
112     }
113 
114 
115     /**
116      *
117      * TODO 關閉文檔時，替換模板，完成整個頁眉頁腳組件
118      *
119      * @see com.itextpdf.text.pdf.PdfPageEventHelper#onCloseDocument(com.itextpdf.text.pdf.PdfWriter,
120      *      com.itextpdf.text.Document)
121      */
122     public void onCloseDocument(PdfWriter writer, Document document) {
123         // 7.最後一步，是關閉文檔的時候，將模板替換成實際的 Y 值,至此，page x of y 製做完畢，完美兼容各類文檔size。
124         total.beginText();
125         total.setFontAndSize(bf, presentFontSize);// 生成的模版的字體、顏色
126         String foot2 = " " + (writer.getPageNumber()-1) + " 頁";
127         total.showText(foot2);// 模版顯示的內容
128         total.endText();
129         total.closePath();
130     }
131 }