README.md · sunny360/历经一个月总结使用java实现pdf文件的电子签字+盖章+防伪二维码+水印+PDF文件加密的全套解决方案

# 历经一个月总结使用java实现pdf文件的电子签字+盖章+防伪二维码+水印+PDF文件加密的全套解决方案
# 一、前言

&#x20;   九月中旬到十月底，我和同事参加了某个系统的开发，涉及到对PDF的电子签字+盖章+防伪二维码+水印等，我最开始选择使用pageoffice实现PDF的盖章和签字，并且也写了一篇博客来进行详细的介绍（pageoffice实现签名盖章：[http://t.csdn.cn/nNxpe](http://t.csdn.cn/nNxpe "http://t.csdn.cn/nNxpe")），但是出现一个问题，PageOffice支持JAVA、[ASP.NET](http://ASP.NET "ASP.NET")、PHP多种编程开发语言，使开发集成简单高效，事半功倍。让集成PAGEOFFICE的协同办公系统更具价值，但是他是卓正软件公司的一个项目，需要收费，并且安全系数不一定能得到保证，而这个项目需要上生产，所以经过多方的研究，学习，总结，今天终于将一套PDF集成线上签字+盖章+防伪二维码+水印的一系列解决方法总结出来，今天写这篇博客进行开源

# 二、使用itextPDF实现PDF电子公章工具类

### 1、电子公章的制作

&#x20;   我们需要实现电子公章盖章，但是不能使用公司的章，我们这次推荐使用的线上做章工具来模拟电子印章

*   做章网站：[http://seal.biaozhiku.com/](http://seal.biaozhiku.com/ "http://seal.biaozhiku.com/") &#x20;

*   我们选择圆形印章

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_1ySdjiVqeM.png)

*   然后输入公司名，输入章名输入编码然后点击395生成，最后点击保存图片，我们的个人专业章就实现了

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_lr-LPzZxXi.png)

*   **电子公章效果如图：**

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/%E7%A8%8B%E5%BA%8F%E5%91%98%E5%B0%8F%E7%8E%8B%E5%B7%A5%E4%BD%9C%E5%AE%A4_seal.biaozhiku.com_alpha_hJzMkdI_mm.png)

*   PDF模板图

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/%E7%A8%8B%E5%BA%8F%E5%91%98%E5%B0%8F%E7%8E%8B_00_s58T3b8wlh.jpg)

*   生成PDF效果图

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/demo3_00_255Cxa_eGz.jpg)

### 2、itextPDF的相关依赖

```xml
      
        <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>
             
    <dependency>
      <groupId>org.bouncycastle</groupId>
      <artifactId>bcprov-jdk15on</artifactId>
      <version>1.49</version>
    </dependency>
    <dependency>
      <groupId>org.bouncycastle</groupId>
      <artifactId>bcpkix-jdk15on</artifactId>
      <version>1.49</version>
    </dependency>
```

*   使用的是boot项目，所以完整依赖是

```xml
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.5.RELEASE</version>
</parent>
  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    
    <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>1.49</version>
    </dependency>
    <dependency>
      <groupId>org.bouncycastle</groupId>
      <artifactId>bcpkix-jdk15on</artifactId>
      <version>1.49</version>
    </dependency>
  </dependencies>
```

### 3、相关配置及数字签名的配置

#### （1）摘要算法

*   我们项目启动之后报错

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_23PdD597Lv.png)

*   需要加这个配置文件就不报错了，这个主要原因是摘要算法没有，需要引入相关依赖

```xml
   <dependency>
      <groupId>org.bouncycastle</groupId>
      <artifactId>bcprov-jdk15on</artifactId>
      <version>1.49</version>
    </dependency>
    <dependency>
      <groupId>org.bouncycastle</groupId>
      <artifactId>bcpkix-jdk15on</artifactId>
      <version>1.49</version>
    </dependency>
```

*   涉及到加密算法就需要数字签名了（数字签名格式，CMS,CADE），我们就需要一个文件（我的命名是：server.p12）这个东西需要我们自己电脑生成数字签名

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_qzl-QVWTIi.png)

### （2）java工具keytool生成p12数字证书文件

Keytool是用于管理\*\*和证书的工具，位于%JAVA\_HOME%/bin目录。 &#x20;
使用JDK的keytool工具 &#x20;

*   keytool在jdk的bin目录下 &#x20;

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_A5L2e9Fqso.png)

2\. 打开keytool所在的bin目录，然后在上面的路径显示框中输入CMD，然后回车，即可在当前文件夹下打开命令提示符，并且路径是当前文件夹。

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_KgdNXg9mE6.png)

*   生成数字文件，在命令行输入

```java
keytool -genkeypair -alias whj -keypass 111111 -storepass 111111 -dname “C=CN,ST=SD,L=QD,O=haier,OU=dev,CN=haier.com” -keyalg RSA -keysize 2048 -validity 3650 -keystore D:\keystore\server.keystore
```

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_cynvPl3LoN.png)

参数解释：

```bash
storepass keystore 文件存储密码
keypass 私钥加解密密码
alias 实体别名(包括证书私钥)
dname 证书个人信息
keyalt 采用公钥算法，默认是DSA keysize **长度(DSA算法对应的默认算法是sha1withDSA，不支持2048长度，此时需指定RSA)
validity 有效期
keystore 指定keystore文件
```

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_ZWjJHgBwtp.png)

*   转换为p12格式

在命令行输入

```java
keytool -importkeystore -srckeystore D:\keystore\server.keystore -destkeystore D:\keystore\whj.p12 -srcalias whj -destalias serverkey -srcstoretype jks -deststoretype pkcs12 -srcstorepass 111111 -deststorepass 111111 -noprompt
```

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image__ik2dGnUma.png)

*   生成的最终文件

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_PQAR_RUAi-.png)

### 4、项目结构及源码

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_t3aI1iEX1r.png)

*   工具类（可以直接复制）

```java
package com.whj.pdf;

import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfSignatureAppearance;
import com.itextpdf.text.pdf.PdfStamper;
import com.itextpdf.text.pdf.security.*;
import com.whj.entity.SignatureInfo;

import java.io.*;
import java.security.GeneralSecurityException;

/**
 * @author 王恒杰
 * @date 2022/10/13 22:52
 * @Description:盖章功能工具类
 */
public class ItextUtil {

public static final char[] PASSWORD = "111111".toCharArray();// keystory密码

/**
     * 单多次签章通用
     *
     * @param src
     * @param target
     * @param signatureInfo
     * @throws GeneralSecurityException
     * @throws IOException
     * @throws DocumentException
     */
    @SuppressWarnings("resource")
    public void sign(String src, String target, SignatureInfo signatureInfo) {
        InputStream inputStream = null;
        FileOutputStream outputStream = null;
        ByteArrayOutputStream result = new ByteArrayOutputStream();
        try {
            inputStream = new FileInputStream(src);
            ByteArrayOutputStream tempArrayOutputStream = new ByteArrayOutputStream();
            PdfReader reader = new PdfReader(inputStream);
            // 创建签章工具PdfStamper ，最后一个boolean参数是否允许被追加签名
            // false的话，pdf文件只允许被签名一次，多次签名，最后一次有效
            // true的话，pdf可以被追加签名，验签工具可以识别出每次签名之后文档是否被修改
            PdfStamper stamper = PdfStamper.createSignature(reader,
                    tempArrayOutputStream, '\0', null, true);
            // 获取数字签章属性对象
            PdfSignatureAppearance appearance = stamper
                    .getSignatureAppearance();
            appearance.setReason(signatureInfo.getReason());
            appearance.setLocation(signatureInfo.getLocation());
            // 设置签名的位置，页码，签名域名称，多次追加签名的时候，签名预名称不能一样 图片大小受表单域大小影响（过小导致压缩）
            // 签名的位置，是图章相对于pdf页面的位置坐标，原点为pdf页面左下角
            // 四个参数的分别是，图章左下角x，图章左下角y，图章右上角x，图章右上角y
            //四个参数的分别是，图章左下角x，图章左下角y，图章右上角x，图章右上角y
            appearance.setVisibleSignature(new Rectangle(280, 220, 140, 600), 1, "sig1");
            // 读取图章图片
            Image image = Image.getInstance(signatureInfo.getImagePath());
            appearance.setSignatureGraphic(image);
            appearance.setCertificationLevel(signatureInfo
                    .getCertificationLevel());
            // 设置图章的显示方式，如下选择的是只显示图章（还有其他的模式，可以图章和签名描述一同显示）
            appearance.setRenderingMode(signatureInfo.getRenderingMode());
            // 这里的itext提供了2个用于签名的接口，可以自己实现，后边着重说这个实现
            // 摘要算法
            ExternalDigest digest = new BouncyCastleDigest();
            // 签名算法
            ExternalSignature signature = new PrivateKeySignature(
                    signatureInfo.getPk(), signatureInfo.getDigestAlgorithm(),
                    null);
            // 调用itext签名方法完成pdf签章 //数字签名格式，CMS,CADE
            MakeSignature.signDetached(appearance, digest, signature,
                    signatureInfo.getChain(), null, null, null, 0,
                    MakeSignature.CryptoStandard.CADES);

inputStream = new ByteArrayInputStream(
                    tempArrayOutputStream.toByteArray());
            // 定义输入流为生成的输出流内容，以完成多次签章的过程
            result = tempArrayOutputStream;

outputStream = new FileOutputStream(new File(target));
            outputStream.write(result.toByteArray());
            outputStream.flush();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != outputStream) {
                    outputStream.close();
                }
                if (null != inputStream) {
                    inputStream.close();
                }
                if (null != result) {
                    result.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}

```

*   实体类

```java
package com.whj.entity;

import com.itextpdf.text.pdf.PdfSignatureAppearance;

import java.security.PrivateKey;
import java.security.cert.Certificate;

/**
 * @author 王恒杰
 * @date 2022/10/13 22:52
 * @Description:
 */
public class SignatureInfo {
    private String reason; //签名的原因，显示在pdf签名属性中
    private String location;//签名的地点，显示在pdf签名属性中
    private String digestAlgorithm;//摘要算法名称，例如SHA-1
    private String imagePath;//图章路径
    private String fieldName;//表单域名称
    private Certificate[] chain;//证书链
    private PrivateKey pk;//签名私钥
    private int certificationLevel = 0; //批准签章
    private PdfSignatureAppearance.RenderingMode renderingMode;//表现形式：仅描述，仅图片，图片和描述，签章者和描述
    //图章属性
    private float rectllx;//图章左下角x
    private float rectlly;//图章左下角y
    private float recturx;//图章右上角x
    private float rectury;//图章右上角y

public float getRectllx() {
        return rectllx;
    }

public void setRectllx(float rectllx) {
        this.rectllx = rectllx;
    }

public float getRectlly() {
        return rectlly;
    }

public void setRectlly(float rectlly) {
        this.rectlly = rectlly;
    }

public float getRecturx() {
        return recturx;
    }

public void setRecturx(float recturx) {
        this.recturx = recturx;
    }

public float getRectury() {
        return rectury;
    }

public void setRectury(float rectury) {
        this.rectury = rectury;
    }

public String getReason() {
        return reason;
    }

public void setReason(String reason) {
        this.reason = reason;
    }

public String getLocation() {
        return location;
    }

public void setLocation(String location) {
        this.location = location;
    }

public String getDigestAlgorithm() {
        return digestAlgorithm;
    }

public void setDigestAlgorithm(String digestAlgorithm) {
        this.digestAlgorithm = digestAlgorithm;
    }

public String getImagePath() {
        return imagePath;
    }

public void setImagePath(String imagePath) {
        this.imagePath = imagePath;
    }

public String getFieldName() {
        return fieldName;
    }

public void setFieldName(String fieldName) {
        this.fieldName = fieldName;
    }

public Certificate[] getChain() {
        return chain;
    }

public void setChain(Certificate[] chain) {
        this.chain = chain;
    }

public PrivateKey getPk() {
        return pk;
    }

public void setPk(PrivateKey pk) {
        this.pk = pk;
    }

public int getCertificationLevel() {
        return certificationLevel;
    }

public void setCertificationLevel(int certificationLevel) {
        this.certificationLevel = certificationLevel;
    }

public PdfSignatureAppearance.RenderingMode getRenderingMode() {
        return renderingMode;
    }

public void setRenderingMode(PdfSignatureAppearance.RenderingMode renderingMode) {
        this.renderingMode = renderingMode;
    }

}

```

*   测试

```java
package com.whj.pdf;

import com.itextpdf.text.pdf.PdfSignatureAppearance;
import com.itextpdf.text.pdf.security.DigestAlgorithms;
import com.whj.entity.SignatureInfo;

import java.io.FileInputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.cert.Certificate;

import static com.whj.pdf.ItextUtil.PASSWORD;

/**
 * @author 王恒杰
 * @date 2022/10/24 10:42
 * @Description:  盖章功能实现
 */
public class PdfStamp {
    public static void main(String[] args) {
        try {
            ItextUtil app = new ItextUtil();
            // 将证书文件放入指定路径，并读取keystore ，获得私钥和证书链
            String pkPath = "src/main/resources/whj.p12";
            KeyStore ks = KeyStore.getInstance("PKCS12");
            ks.load(new FileInputStream(pkPath), PASSWORD);
            String alias = ks.aliases().nextElement();
            PrivateKey pk = (PrivateKey) ks.getKey(alias, PASSWORD);
            // 得到证书链
            Certificate[] chain = ks.getCertificateChain(alias);
            //需要进行签章的pdf
            String path = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\pdf\\程序员小王.pdf";
            // 封装签章信息
            SignatureInfo signInfo = new SignatureInfo();
            signInfo.setReason("理由");
            signInfo.setLocation("位置");
            signInfo.setPk(pk);
            signInfo.setChain(chain);
            signInfo.setCertificationLevel(PdfSignatureAppearance.NOT_CERTIFIED);
            signInfo.setDigestAlgorithm(DigestAlgorithms.SHA1);
            signInfo.setFieldName("demo");

// 签章图片
            signInfo.setImagePath("D:\\Idea\\stamp\\Itext\\src\\main\\resources\\pdf\\chapter.png");
            signInfo.setRenderingMode(PdfSignatureAppearance.RenderingMode.GRAPHIC);
            //// 值越大，代表向x轴坐标平移 缩小 （反之，值越小，印章会放大）
            signInfo.setRectllx(100);
            //// 值越大，代表向y轴坐标向上平移（大小不变）
            signInfo.setRectlly(200);
            // 值越大   代表向x轴坐标向右平移  （大小不变）
            signInfo.setRecturx(150);
            // 值越大，代表向y轴坐标向上平移（大小不变）
            signInfo.setRectury(150);

//签章后的pdf路径
            app.sign(path, "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\pdf\\out.pdf", signInfo);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

```

### 5、结果展示

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_UnvRIku7C9.png)

# 三、thymeleaf+itext签字功能+PDF文件加密实现

*   所以需依赖

*   需要手工导入一个jar包（jar包我放在了源码里面，需要自行下载）

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_DLEtxY_wX1.png)

```

因为这个的相关类太多，只展示了核心代码，全部代码请到博客底部下载源码

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_twmNnIa3Ms.png)

### 1、签字图片上传和签字实现的Controller

```java
package com.whj.controller;

import com.whj.service.SignService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * @author 王恒杰
 * @date 2022/10/24 13:57
 * @Description: 实现签字上传和签字功能
 */
@RestController
@RequestMapping("/sign")
public class SignController {
    @Autowired
    private SignService signService;

@PostMapping(value = "/uploadSign")
    @ResponseBody
    public String uploadSign(String img) {
        return signService.uploadSign(img);
    }

@PostMapping(value = "/sign")
    @ResponseBody
    public String sign() {
        return signService.sign(id);
    }
}

```

### 2、签字上传，签字，PDF文件加密业务层实现

```java
/**
 * @author 王恒杰
 * @date 2022/10/24 14:00
 * @Description:
 */
@Service
public class SignServiceImpl implements  SignService{
    @Override
    public String uploadSign(String img) {

//String idCard="3000";
        // 生成jpeg图片 idCard.asString()
        String url = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\img\\sign.png";

try {
            if (img == null) // 图像数据为空
            {
                return "no";
            }
            int i = img.indexOf("base64,") + 7;//获取前缀data:image/gif;base64,的坐标
            String newImage = img.substring(i, img.length());//去除前缀

BASE64Decoder decoder = new BASE64Decoder();
            // Base64解码
            byte[] bytes = decoder.decodeBuffer(newImage);

for (int j = 0; j < bytes.length; ++j) {
                if (bytes[j] < 0) {// 调整异常数据
                    bytes[j] += 256;
                }
            }

OutputStream out = new FileOutputStream(url);

out.write(bytes);
            out.flush();
            out.close();
            return "yes";
        } catch (Exception e) {
            return "no";
        }
    }

@Override
    public String sign() {
            try {
                //初始化文件
                String srcPath = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\pdf\\out.pdf";
                //输出文件
                String outPath = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\pdf\\signOut.pdf";

signimg("D:\\Idea\\stamp\\Itext\\src\\main\\resources\\img\\sign.png", srcPath, "批准人", outPath);
                //加密
                EncryptPDFUtil.encryptPDF(outPath, "EncryptPDF");

return "yes";
            } catch (Exception e) {
                return "no";
            }
    }

```

*   封装签字的方法

```java
    public static void signimg(String imgurl, String pdfurl, String keywords, String outPDFPath) throws IOException {
        List list = new ArrayList();
        SignPDFBean bean1 = new SignPDFBean();
        bean1.setKeyStorePass("111111");
        bean1.setKeyStorePath("src/main/resources/server.p12");
        bean1.setKeyWord(keywords);
        bean1.setSealPath(imgurl);
        bean1.setSignLocation(keywords);
        bean1.setSignReason("计量检定证书签字");

list.add(bean1);

SignPDFRequestBean requestBean = new SignPDFRequestBean();
        requestBean.setSrcPDFPath(pdfurl);
        requestBean.setOutPDFPath(outPDFPath);
        requestBean.setSignPDFBeans(list);

long startTime = System.currentTimeMillis();
        // 1.解析pdf文件
        Map<Integer, List<KeyWordBean>> map = KeywordPDFUtils.getPDFText(requestBean.getSrcPDFPath());
        // 2.获取关键字坐标
        List<SignPDFBean> beans = requestBean.getSignPDFBeans();
        byte[] fileData = null;
        InputStream in = null;
        for (int i = 0; i < beans.size(); i++) {
            SignPDFBean pdfBean = beans.get(i);
            KeyWordBean bean = KeywordPDFUtils.getKeyWordXY1(map, pdfBean.getKeyWord());
            if (null == bean) {
                System.out.println("未查询到关键字。。。");
            }
            System.out.println("111" + bean.toString());
            long keyTime = System.currentTimeMillis();
            if (i == 0) {
                in = new FileInputStream(requestBean.getSrcPDFPath());
            } else {
                in = new ByteArrayInputStream(fileData);
            }
            // 3.进行盖章
            fileData = SignPDFUtils.sign(pdfBean.getKeyStorePass(), pdfBean.getKeyStorePath(), in, pdfBean.getSealPath(), bean.getX(), bean.getY(), bean.getPage(), pdfBean.getSignReason(), pdfBean.getSignLocation());
            long signTime = System.currentTimeMillis();
        }
        // 4.输出盖章后pdf文件
        FileOutputStream f = new FileOutputStream(new File(requestBean.getOutPDFPath()));
        f.write(fileData);
        f.close();
        in.close();

long endTime = System.currentTimeMillis();
        System.out.println("总时间：" + (endTime - startTime));
    }

}
```

### 3、封装的实现PDF加密文件的方法

```java
package com.whj.util;

import com.spire.pdf.PdfDocument;
import com.spire.pdf.security.PdfEncryptionKeySize;
import com.spire.pdf.security.PdfPermissionsFlags;

import java.util.EnumSet;

/**
 * @author 王恒杰
 * @date 2022/10/18 9:26
 * @Description:   将PDF加密的工具类
 */
public  class EncryptPDFUtil {
    public static void encryptPDF(String startFileName,String EncryptPDF) {
        //创建PdfDocument实例
        PdfDocument doc = new PdfDocument();
        //加载PDF文件
        doc.loadFromFile(startFileName);
        //添加一个空白页，目的为了删除jar包添加的水印，后面再移除这一页
        doc.getPages().add();
        //加密PDF文件
        PdfEncryptionKeySize keySize = PdfEncryptionKeySize.Key_128_Bit;
        String openPassword = "123456";//打开文档时，仅用于查看文档
        String permissionPassword = "test";//打开文档时，可编辑文档
        EnumSet flags = EnumSet.of(PdfPermissionsFlags.Print, PdfPermissionsFlags.Fill_Fields);
        doc.getSecurity().encrypt(openPassword, permissionPassword, flags, keySize);
        //移除第一个页
        doc.getPages().remove(doc.getPages().get(doc.getPages().getCount()-1));
        //保存文件
        doc.saveToFile("src/main/resources/pdf/EncryptPDF/"+EncryptPDF+".pdf");

doc.close();
    }
}

```

### 4、签字前端（thymeleaf实现）

*   配置文件

```.properties
server.port=8081
spring.thymeleaf.prefix=classpath:/templates/

```

*   前端源码

```html
<!DOCTYPE html>
<html>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  
  
  <title>手写签名</title>
  <script type="text/javascript" src="../jquery-3.1.1.min.js" ></script>
  <script type="text/javascript" src="../ajaxfileupload.js" ></script>
  <style type="text/css">
    #canvas {}
  </style>
</head>
  <body id="bb">
    <div id="canvasDiv"></div>
    <br><br><br>
    <button id="btn_clear">清除</button>
    <button id="btn_submit">提交</button>
    <script language="javascript">

try
   {
   function onDocumentTouchStart(event) {
        if(event.touches.length == 1) {
          event.preventDefault();
          // Faking double click for touch devices
          var now = new Date().getTime();
          if(now - timeOfLastTouch < 250) {
            reset();
            return;
          }
          timeOfLastTouch = now;
          mouseX = event.touches[0].pageX;
          mouseY = event.touches[0].pageY;
          isMouseDown = true;
        }
      }
      function onDocumentTouchMove(event) {
        if(event.touches.length == 1) {
          event.preventDefault();
          mouseX = event.touches[0].pageX;
          mouseY = event.touches[0].pageY;
        }
      }
      function onDocumentTouchEnd(event) {
        if(event.touches.length == 0) {
          event.preventDefault();
          isMouseDown = false;
        }
      }
      var canvasDiv = document.getElementById('canvasDiv');
      var canvas = document.createElement('canvas');
      var canvasWidth = 1191;
      var canvasHeight = 670;
      document.addEventListener('touchmove', onDocumentTouchMove, false);
      /*document.addEventListener('touchstart', onDocumentTouchStart, true);
      document.addEventListener('touchend', onDocumentTouchEnd, true);*/
      var point = {};
      point.notFirst = false;
      canvas.setAttribute('width', canvasWidth);
      canvas.setAttribute('height', canvasHeight);
      canvas.setAttribute('id', 'canvas');
      canvasDiv.appendChild(canvas);
      if(typeof G_vmlCanvasManager != 'undefined') {
        canvas = G_vmlCanvasManager.initElement(canvas);
      }
      var context = canvas.getContext("2d");
      var img = new Image();
      img.src = "./write.jpg";
      img.onload = function() {
        var ptrn = context.createPattern(img, 'no-repeat');
        context.fillStyle = ptrn;
        context.fillRect(0, 0, canvas.width, canvas.height);
      }
      canvas.addEventListener("touchstart", function(e) {
        console.log("touchstart");
        var mouseX = e.touches[0].pageX - this.offsetLeft;
        var mouseY = e.touches[0].pageY - this.offsetTop;
        paint = true;
        addClick(e.touches[0].pageX - this.offsetLeft, e.touches[0].pageY - this.offsetTop);
        redraw();
      });
      canvas.addEventListener("touchend", function(e) {
        console.log("touchend");
        paint = false;
      });
      canvas.addEventListener("touchmove", function(e) {
        console.log("touchmove");
        console.log(e);
        console.log("触摸坐标:"+(e.touches[0].clientX - this.offsetLeft)+","+(e.touches[0].clientY - this.offsetTop));
        if(paint) {
          addClick(e.touches[0].pageX - this.offsetLeft, e.touches[0].pageY - this.offsetTop, true);
          redraw();
        }
      });
      canvas.addEventListener("mousedown", function(e) {
        console.log("mousedown");
        var mouseX = e.pageX - this.offsetLeft;
        var mouseY = e.pageY - this.offsetTop;
        paint = true;
        addClick(e.pageX - this.offsetLeft, e.pageY - this.offsetTop);
        redraw();
      });
      canvas.addEventListener("mousemove", function(e) {
        console.log(e);
        /*console.log(this.offsetLeft);
        console.log(this.offsetTop);*/
        console.log("鼠标坐标:"+(e.pageX - this.offsetLeft)+","+(e.pageY - this.offsetTop));
        console.log("mousemove");
        if(paint) {
          addClick(e.pageX - this.offsetLeft, e.pageY - this.offsetTop, true);
          redraw();
        }
      });
      canvas.addEventListener("mouseup", function(e) {
        console.log("mouseup");
        paint = false;
      });
      canvas.addEventListener("mouseleave", function(e) {
        console.log("mouseleave");
        paint = false;
      });
      var clickX = new Array();
      var clickY = new Array();
      var clickDrag = new Array();
      var paint;
      function addClick(x, y, dragging)
      {
        clickX.push(x);
        clickY.push(y);
        clickDrag.push(dragging);
        console.debug(clickDrag);
      }
      function redraw() {
        
        //canvas.width = canvas.width; // Clears the canvas
        context.strokeStyle = "black";
        context.lineJoin = "round";
        context.lineWidth = 5;
        while(clickX.length > 0) {
          
          point.bx = point.x;
          point.by = point.y;
          point.x = clickX.pop();
          point.y = clickY.pop();
          console.log(point.x);
          console.log(point.y);
          /*alert(point.x);
          alert(point.y);*/
          point.drag = clickDrag.pop();
          context.beginPath();
          if(point.drag && point.notFirst) {
            context.moveTo(point.bx, point.by);
          } else {
            point.notFirst = true;
            context.moveTo(point.x - 1, point.y);
          }
          context.lineTo(point.x, point.y);
          context.closePath();
          context.stroke();
        }
        
        
        
        
        
          for(var i=0; i < clickX.length; i++)
          {    
            context.beginPath();
            if(clickDrag[i] && i){
              context.moveTo(clickX[i-1], clickY[i-1]);
            }else{
               context.moveTo(clickX[i]-1, clickY[i]);
            }
             context.lineTo(clickX[i], clickY[i]);
             context.closePath();
             context.stroke();
          }
       
          
          
      }
      var clear = document.getElementById("btn_clear");
      var submit = document.getElementById("btn_submit");
          var i =0;
      clear.addEventListener("click", function() {
        canvas.width = canvas.width;
      });
      submit.addEventListener("click", function() {
        $("#file").attr("src", canvas.toDataURL("image/png"));
                /*imgData = canvas.toDataURL("image/png").replace("image/png",'image/octet-stream');
                var saveFile = function(data, filename) {
                    var save_link = document.createElementNS('a');
                    save_link.href = data;
                    save_link.download = filename;

</script>
      <img id="file" />
  </body>
</html>
```

### 4、实现签字功能演示

*   启动springboot项目

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_Ow5A-xr0tg.png)

*   输入[http://localhost:8080/](http://localhost:8080/ "http://localhost:8080/") 打开签字页面，输入姓名点击提交

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_a4El9oQzlW.png)

*   提交成功会显示提交成功

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_0wGCDh86HW.png)

*   服务器上可以看到图片已经保存好了

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_qL1bDU-MF9.png)

### 5、实现PDF的签字和加密

#### （1）PDF加密实现思路讲解（详细代码看工具类）

*   PDF加密的方法

```java
    //加密
                EncryptPDFUtil.encryptPDF(outPath, "EncryptPDF");
```

*   然后我们分装了两个权限，如果是需要对这个PDF文件修改一个密码，只能查看PDF一个密码

```java
        //加密PDF文件
        PdfEncryptionKeySize keySize = PdfEncryptionKeySize.Key_128_Bit;
        String openPassword = "123456";//打开文档时，仅用于查看文档
        String permissionPassword = "test";//打开文档时，可编辑文档
```

#### （2）实现签字的方法的讲解

```java
 signimg("src/main/resources/img/sign.png", srcPath, "批准人", outPath);
```

*   其中第一个参数代表的是签字的图片，第二个参数源文件，第三个参数是“批准人”这个关键字的地方进行签字，第四个参数代表的是输出路径

#### （3)使用postman测试(因为是post接口，所有只能使用postman进行简单的测试)

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_Ulgf55F_7H.png)

#### （4）最终生成了两个文件

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_co23ZeHqo_.png)

*   一个是没有加密的signOut.pdf，他是签字后生成的文件

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_BBIogUAKhq.png)

*   加密后的文件EncryptPDF.pdf 这个需要输入密码才能打开文件

*   输入只读密码 123456

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_sdhPjH-DRo.png)

*   打开文件后，里面的所有文字不能复制

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_EzXS88Odsq.png)

*   使用可以修改权限打开文件 密码：test  文件是可以复制可以修改的

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_OaN7WYGeLG.png)

# 四、PDF实现生成水印并删除源文件

### 1、生成水印的工具类

```java
package com.whj.util;

import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Element;
import com.itextpdf.text.pdf.*;

import java.io.File;
import java.io.FileOutputStream;

/**
 * @author 王恒杰
 * @date 2022/10/21 14:53
 * @Description:
 */
public class WaterMark {
    /**
     * pdf生成水印
     *
     * @param srcPdfPath       插入前的文件路径
     * @param tarPdfPath       插入后的文件路径
     * @param WaterMarkContent 水印文案
     * @param numberOfPage     每页需要插入的条数
     * @throws Exception
     */
    public static void addWaterMark(String srcPdfPath, String tarPdfPath, String WaterMarkContent, int numberOfPage) throws Exception {
        PdfReader reader = new PdfReader(srcPdfPath);
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(tarPdfPath));
        PdfGState gs = new PdfGState();
        System.out.println("adksjskalfklsdk");
        //设置字体
        BaseFont font = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);

// 设置透明度
        gs.setFillOpacity(0.4f);

int total = reader.getNumberOfPages() + 1;
        PdfContentByte content;
        for (int i = 1; i < total; i++) {
            content = stamper.getOverContent(i);
            content.beginText();
            content.setGState(gs);
            //水印颜色
            content.setColorFill(BaseColor.DARK_GRAY);
            //水印字体样式和大小
            content.setFontAndSize(font, 35);
            //插入水印  循环每页插入的条数
            for (int j = 0; j < numberOfPage; j++) {
                content.showTextAligned(Element.ALIGN_CENTER, WaterMarkContent, 300, 200 * (j + 1), 30);
            }
            content.endText();
        }
        stamper.close();
        reader.close();
        boolean b = deleteFile(srcPdfPath);
        System.out.println("PDF水印添加完成！");
    }

}

```

删除源文件

```java
   //删除没有用的文件
    public static boolean deleteFile(String path) {
        boolean result = false;
        File file = new File(path);
        if (file.isFile() && file.exists()) {
            int tryCount = 0;
            while (!result && tryCount++ < 10) {
                System.gc();
                result = file.delete();
            }
        }

return result;
    }
```

### 2、测试

#### （1）加水印之前的源文件

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_6OTD5ffc1N.png)

#### （2）测试代码

```java
public class TestWaterMark {
    public static void main(String[] args) {
        /**
         * pdf生成水印
         *
         * @param srcPdfPath       插入前的文件路径
         * @param tarPdfPath       插入后的文件路径
         * @param WaterMarkContent 水印文案
         * @param numberOfPage     每页需要插入的条数
         * @throws Exception
         */
        String srcPdfPath = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\pdf\\signOut.pdf";
        String tarPdfPath = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\pdf\\TestWaterMark.pdf";
        String WaterMarkContent = "程序员小王";
        Integer numberOfPage = 3;
        try {
            WaterMark.addWaterMark(srcPdfPath, tarPdfPath, WaterMarkContent, numberOfPage);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
```

![](image/image_XDeFaw_Svq.png)

*   删除源文件的代码

```java
   boolean b = deleteFile(srcPdfPath);
```

#### （3）加水印之后的文件

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_Hi0RG6gya7.png)

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_4XTCsTLyBr.png)

# 五、PDF使用工具Adobe Acrobat DC+PDF+Itext模板实现二维码功能

### 1、打开电脑中的Adobe Acrobat pro DC（这个应该win10 都有，搜索一下就出来了），点击 文件→创建→创建表单

* 如果没有自己安装下载一个**下载地址：**[adobe acrobat pro dc2018破解版](https://pan.baidu.com/s/12oAFq3rPD0S91CdEPHgZQA "adobe acrobat pro dc2018破解版")

* acrobat pro dc 2018序列号 &#x20;

1118-1629-0753-5166-7814-8217

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_iq_TamIWmF.png)

### 2、然后导入刚刚生成的pdf（注意签名后的文件不能再进行添加二维码或者文字了）

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_gQcutbLKdS.png)

### 3、点击图片

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_XaU_hRRv_s.png)

### 4、固定好二维码固定位置然后编辑他为img()

*   击这个阴影部分，将名称改成你要设置的名称，后面要根据这个名称来给他赋值

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_ggaey5_KFm.png)

### 5、全部设置好以后就可以另存为了，打开后是这个样子

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_3lE9BsMnag.png)

### 6、实现二维码生成的工具类（仅供测试，详细代码看7）

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_j6VVwkUG5Z.png)

*   jar包

```xml
  
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.3.0</version>
        </dependency>
```

*   代码

```java
package com.whj.util.QR;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.util.Hashtable;

/**
 * @author 王恒杰
 * @date 2022/10/21 16:25
 * 二维码生成工具类
 *
 * 通过Google开源的zxing库来事项生成二维码图片
 */
public class QrCodeUtils {

public static final String QR_CODE_IMAGE_PATH = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\QR\\MyQRCode.png";

public static void generateQRCodeImage(String text, int width, int height, String filePath) throws WriterException, IOException {
        QRCodeWriter qrCodeWriter = new QRCodeWriter();

BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);

Path path = FileSystems.getDefault().getPath(filePath);

MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path);

}

/**
     * 生成二维码
     * @param contents 二维码的内容
     * @param width 二维码图片宽度
     * @param height 二维码图片高度
     */
    public static BufferedImage createQrCodeBufferdImage(String contents, int width, int height){
        Hashtable hints= new Hashtable();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        BufferedImage image = null;
        try {
            BitMatrix bitMatrix = new MultiFormatWriter().encode(
                    contents,BarcodeFormat.QR_CODE, width, height, hints);
            image = toBufferedImage(bitMatrix);
        } catch (WriterException e) {
            e.printStackTrace();
        }
        return image;
    }

public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, matrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        return image;
    }

public static void main(String[] args) {
        try {
            generateQRCodeImage ("https://www.baidu.com/", 350, 350,QR_CODE_IMAGE_PATH);
        } catch (WriterException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

}

```

*   测试二维码生成

```java
package com.whj.util.QR;

import com.google.zxing.WriterException;

import java.io.IOException;

import static com.whj.util.QR.QrCodeUtils.QR_CODE_IMAGE_PATH;

/**
 * @author 王恒杰
 * @date 2022/10/24 15:42
 * @Description:
 */
public class TestQR {
    public static void main(String[] args) {
        try {
            /**
             * 第一个参数：内容可以是二维码 也可以是内容
             * 第二第三参数：二维码的宽高
             * 第四个参数：二维码生成后的地址
             */
            QrCodeUtils.generateQRCodeImage ("https://www.wolai.com/6MjBCdAq3mmGXBcb62V4DE", 350, 350,QR_CODE_IMAGE_PATH);
        } catch (WriterException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}
```

*   生成后的二维码

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_DIVOxqryr7.png)

### 7、生成二维码之后将二维码嵌入进PDF综合版本

*   生成二维码并且嵌入PDF工具

```java
package com.whj;

import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Font;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.*;

import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

/**
 * @author 王恒杰
 * @date 2022/10/24 16:06
 * @Description:
 */
public class QR {

// 利用模板生成pdf

public static void pdfout(Map<String,Object> map) {

// 模板路径

String templatePath = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\QR\\QR.pdf";

// 生成的新文件路径

String newPDFPath = "D:\\Idea\\stamp\\Itext\\src\\main\\resources\\QR\\testout.pdf";

PdfReader reader;

FileOutputStream out;

ByteArrayOutputStream bos;

PdfStamper stamper;

try {

//给表单添加中文字体 这里采用系统字体。不设置的话，中文可能无法显示

BaseFont bf = BaseFont.createFont("D:\\Idea\\stamp\\Itext\\src\\main\\resources\\Font\\SIMYOU.TTF" , BaseFont.IDENTITY_H, BaseFont.EMBEDDED);

Font FontChinese = new Font(bf, 5, Font.NORMAL);

// 输出流

out = new FileOutputStream(newPDFPath);

// 读取pdf模板

reader = new PdfReader(templatePath);

bos = new ByteArrayOutputStream();

stamper = new PdfStamper(reader, bos);

AcroFields form = stamper.getAcroFields();

Map<String,Object> qrcodeFields=(Map<String, Object>) map.get("qrcodeFields");

//遍历二维码字段

for (Map.Entry<String, Object> entry : qrcodeFields.entrySet()) {

String key = entry.getKey();

Object value = entry.getValue();

// 获取属性的类型

if(value != null && form.getField(key) != null){

//获取位置(左上右下)

AcroFields.FieldPosition fieldPosition = form.getFieldPositions(key).get(0);

//绘制二维码

float width = fieldPosition.position.getRight() - fieldPosition.position.getLeft();

BarcodeQRCode pdf417 = new BarcodeQRCode(value.toString(), (int)width, (int)width, null);

//生成二维码图像

Image image128 = pdf417.getImage();

//绘制在第一页

PdfContentByte cb = stamper.getOverContent(1);

//左边距(居中处理)

float marginLeft = (fieldPosition.position.getRight() - fieldPosition.position.getLeft() - image128.getWidth()) / 2;

//条码位置

image128.setAbsolutePosition(fieldPosition.position.getLeft() + marginLeft, fieldPosition.position.getBottom());

//加入条码

cb.addImage(image128);

}

// 如果为false，生成的PDF文件可以编辑，如果为true，生成的PDF文件不可以编辑

stamper.setFormFlattening(true);

stamper.close();

Document doc = new Document();

Font font = new Font(bf, 20);

PdfCopy copy = new PdfCopy(doc, out);

doc.open();
            PdfImportedPage importPage = copy.getImportedPage(new PdfReader(bos.toByteArray()), 1);

copy.addPage(importPage);

doc.close();

} catch (IOException e) {

e.printStackTrace();

} catch (DocumentException e) {

e.printStackTrace();

}

```

*   测试

```java
 public static void main(String[] args) {

//文本内容map

Map<String,Object> map = new HashMap<String, Object>();

//二维码map

Map<String,Object> qrcodeFields = new HashMap<String, Object>();

qrcodeFields.put("img","https://www.wolai.com/6MjBCdAq3mmGXBcb62V4DE");

//组装map传过去

Map<String,Object> o=new HashMap<String, Object>();

o.put("qrcodeFields",qrcodeFields);
        //执行

pdfout(o);

}
```

![](https://csdn-image.oss-cn-beijing.aliyuncs.com/img/image_xRPHg-uIQE.png)

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