pdfbox加密解密PDF文件

非原创，参考网址点击打开链接,记载是为了以后自己方便查找

所需jar包：pdfbox-2.0.5.jar fontbox-2.0.5.jar commons-logging-1.1.1.jar 

maven依赖：

   
                   org.apache.pdfbox  
                   pdfbox  
               2.0.5  
         
       
   commons-logging
   commons-logging
   1.1.1


   org.apache.pdfbox
   fontbox
   2.0.5

加密代码：

public String index() throws InvalidPasswordException, IOException {//加密后的pdf文件会存至2.pdf
    	String srcpath = "d:/1.pdf";
    	String despath = "d:/2.pdf";
    			String ownerPassWord = "123";
    			String userPassWord = "456";
    			File file = new File(srcpath);
    			long start = System.currentTimeMillis();
    			PDDocument load = PDDocument.load(file); 
    			AccessPermission permissions = new AccessPermission(); 
    			permissions.setCanExtractContent(false);
    			permissions.setCanModify(false);
    			StandardProtectionPolicy p = new StandardProtectionPolicy(ownerPassWord , userPassWord, permissions); 
    			SecurityHandler sh = new StandardSecurityHandler(p); 
    			sh.prepareDocumentForEncryption(load);
    			PDEncryption encryptionOptions= new PDEncryption();
    			encryptionOptions.setSecurityHandler(sh);
    			load.setEncryptionDictionary(encryptionOptions);
    			load.save(despath);
        return "Greetings from Spring Boot!";
    }

解密代码

 public void indexs(HttpServletResponse response,HttpServletRequest request) throws InvalidPasswordException, IOException {
    	String despath = "d:/2.pdf";
    	String ownerPassWord = "123";
    	//String srcpath = "d:/3.pdf";
    	File file = new File(despath);
    	PDDocument load = PDDocument.load(file, ownerPassWord);
    	load.setAllSecurityToBeRemoved(true);
    	//load.save(srcpath );
    	 //判断文件类型
        //String mimeType = URLConnection.guessContentTypeFromName(file.getName());
    	String mimeType = "application/pdf";
        response.setContentType(mimeType);
         
        //设置文件响应大小
      //  response.setContentLength((int)file.length());
         
        //文件名编码，解决乱码问题
        String fileName ="4.pdf";
        //设置Content-Disposition响应头，一方面可以指定下载的文件名，另一方面可以引导浏览器弹出文件下载窗口

	//inline 解密后在线预览
        response.setHeader("Content-Disposition", "inline;" + encodeFileName(request,fileName));
        load.save(response.getOutputStream());
    }
    
    public static String encodeFileName(HttpServletRequest request, String fileName) {
    	String userAgent = request.getHeader("User-Agent");
    	String rtn = "";
    	try {
    		String new_filename = URLEncoder.encode(fileName, "UTF8");
    		// 如果没有UA，则默认使用IE的方式进行编码，因为毕竟IE还是占多数的
    		rtn = "filename=\"" + new_filename + "\"";
    		if (userAgent != null) {
    			userAgent = userAgent.toLowerCase();
    			// IE浏览器，只能采用URLEncoder编码
    			if (userAgent.indexOf("msie") != -1) {
    				rtn = "filename=\"" + new_filename + "\"";
    			}
    			// Opera浏览器只能采用filename*
    			else if (userAgent.indexOf("opera") != -1) {
    				rtn = "filename*=UTF-8''" + new_filename;
    			}
    			// Safari浏览器，只能采用ISO编码的中文输出
    			else if (userAgent.indexOf("safari") != -1) {
    				rtn = "filename=\"" + new String(fileName.getBytes("UTF-8"), "ISO8859-1") + "\"";
    			}
    			// Chrome浏览器，只能采用MimeUtility编码或ISO编码的中文输出
    			else if (userAgent.indexOf("applewebkit") != -1) {
    			//	new_filename = MimeUtility.encodeText(fileName, "UTF8", "B");
    				rtn = "filename=\"" + new_filename + "\"";
    			}
    			// FireFox浏览器，可以使用MimeUtility或filename*或ISO编码的中文输出
    			else if (userAgent.indexOf("mozilla") != -1) {
    				rtn = "filename*=UTF-8''" + new_filename;
    			}
    			else
    			{
    				rtn = "filename=\"" + new String(fileName.getBytes("UTF-8"), "ISO8859-1") + "\"";
    			}
    		}
    	} catch (Exception e) {
    		e.printStackTrace();
    	}
    	return rtn;
    }

解密时 PDDocument load = PDDocument.load(file, ownerPassWord);有可能会抛异常

 

java.lang.NotClassFoundError:org/bouncycastle/jce/provider/BouncyCastleProvider

解决方案：
maven添加依赖
  org.bouncycastle   bcprov-jdk16   1.46