java给pdf每页盖签章
时间: 2023-11-25 10:51:19 浏览: 36
以下是Java给PDF每页盖签章的示例代码：
```java
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.cert.Certificate;
import java.util.Calendar;
import java.util.Collections;
import java.util.List;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.interactive.digitalsignature.PDSignature;
import org.apache.pdfbox.pdmodel.interactive.digitalsignature.SignatureOptions;
import org.apache.pdfbox.pdmodel.interactive.form.PDSignatureField;
import org.apache.pdfbox.pdmodel.interactive.form.PDTextField;
import org.apache.pdfbox.pdmodel.interactive.form.PDVariableText;
import org.apache.pdfbox.pdmodel.interactive.form.PDVariableTextFormField;
import org.apache.pdfbox.pdmodel.interactive.form.PlainText;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextFormatter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextParser;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextParserException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextString;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringParser;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringParserException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PDVariableTextFormField.VariableText;
import org.apache.pdfbox.pdmodel.interactive.form.PDVariableTextFormField.VariableTextFormFieldType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatOption;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatOptionType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatOptionValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatOptionValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatOptions;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatOptionsType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatOptionsValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatOptionsValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatTypeType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatTypeValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatTypeValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValue;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterValueType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriter;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterException;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterResult;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterWriterType;
import org.apache.pdfbox.pdmodel.interactive.form.PlainTextStringFormatter.FormatWriterWriterWriterWriterWriterWriter
相关推荐
最新推荐
php实现往pdf中加数字签名操作示例【附源码下载】
主要介绍了php实现往pdf中加数字签名操作,结合完整实例形式详细分析了php基于tcpdf插件实现数字签名操作的具体步骤与相关技巧,并附带crt加密文件、源码等供读者下载,需要的朋友可以参考下
金格科技国资委系统电子签章系统方案
金格电子签章系统，用于对...包括文档签章、手写签名、签章验证、身份认证、撤消签章、证书查看、支持双证书、文档验证、移动签章、禁止移动、文档保护、文档解锁、读取服务器时间、提供相应二次开发数据接口等功能。
zigbee-cluster-library-specification
最新的zigbee-cluster-library-specification说明文档。
管理建模和仿真的文件
管理Boualem Benatallah引用此版本：布阿利姆·贝纳塔拉。管理建模和仿真。约瑟夫-傅立叶大学-格勒诺布尔第一大学，1996年。法语。NNT：电话：00345357HAL ID：电话：00345357https://theses.hal.science/tel-003453572008年12月9日提交HAL是一个多学科的开放存取档案馆，用于存放和传播科学研究论文，无论它们是否被公开。论文可以来自法国或国外的教学和研究机构，也可以来自公共或私人研究中心。L’archive ouverte pluridisciplinaire
实现实时数据湖架构：Kafka与Hive集成
# 1. 实时数据湖架构概述**
实时数据湖是一种现代数据管理架构，它允许企业以低延迟的方式收集、存储和处理大量数据。与传统数据仓库不同，实时数据湖不依赖于预先定义的模式，而是采用灵活的架构，可以处理各种数据类型和格式。这种架构为企业提供了以下优势：
- **实时洞察：**实时数据湖允许企业访问最新的数据，从而做出更明智的决策。
- **数据民主化：**实时数据湖使各种利益相关者都可
机器学习怎么将excel转为csv文件
机器学习是一种利用计算机算法和统计数据的方法来训练计算机来进行自动学习的科学，无法直接将excel文件转为csv文件。但是可以使用Python编程语言来读取Excel文件内容并将其保存为CSV文件。您可以使用Pandas库来读取Excel文件，并使用to_csv()函数将其保存为CSV格式。以下是代码示例：
```python
import pandas as pd
# 读取 Excel 文件
excel_data = pd.read_excel('example.xlsx')
# 将数据保存为 CSV 文件
excel_data.to_csv('example.csv', index=
JSBSim Reference Manual
JSBSim参考手册，其中包含JSBSim简介，JSBSim配置文件xml的编写语法，编程手册以及一些应用实例等。其中有部分内容还没有写完，估计有生之年很难看到完整版了，但是内容还是很有参考价值的。
"互动学习：行动中的多样性与论文攻读经历"
多样性她- 事实上SCI NCES你的时间表ECOLEDO C Tora SC和NCESPOUR l’Ingén学习互动，互动学习以行动为中心的强化学习学会互动，互动学习，以行动为中心的强化学习计算机科学博士论文于2021年9月28日在Villeneuve d'Asq公开支持马修·瑟林评审团主席法布里斯·勒菲弗尔阿维尼翁大学教授论文指导奥利维尔·皮耶昆谷歌研究教授：智囊团论文联合主任菲利普·普雷教授，大学。里尔/CRISTAL/因里亚报告员奥利维耶·西格德索邦大学报告员卢多维奇·德诺耶教授，Facebook /索邦大学审查员越南圣迈IMT Atlantic高级讲师邀请弗洛里安·斯特鲁布博士，Deepmind对于那些及时看到自己错误的人...3谢谢你首先，我要感谢我的两位博士生导师Olivier和Philippe。奥利维尔，"站在巨人的肩膀上"这句话对你来说完全有意义了。从科学上讲，你知道在这篇论文的（许多）错误中，你是我可以依
实现实时监控告警系统：Kafka与Grafana整合
# 1.1 Kafka集群架构
Kafka集群由多个称为代理的服务器组成，这
写出一个拉格朗日多项式插值程序，并调用该函数做图
好的，以下是一个使用拉格朗日多项式进行插值的 Python 代码：
```
import numpy as np
import matplotlib.pyplot as plt
def lagrangeInterpolation(x, y, x_interp):
"""
使用拉格朗日多项式进行插值
x: 已知点的 x 坐标数组
y: 已知点的 y 坐标数组
x_interp: 插值点的 x 坐标数组
"""
n = len(x)
m = len(x_interp)
L = np.zeros([n, m])
fo