wiki.xsx.core.pdf.doc.XEasyPdfDocumentSplitter Maven / Gradle / Ivy
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A framework based on pdfbox
package wiki.xsx.core.pdf.doc;
import lombok.SneakyThrows;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageTree;
import wiki.xsx.core.pdf.util.XEasyPdfConvertUtil;
import wiki.xsx.core.pdf.util.XEasyPdfFileUtil;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.OutputStream;
import java.io.Serializable;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
/**
* pdf文档拆分器
*
* @author xsx
* @date 2020/5/24
* @since 1.8
*
* Copyright (c) 2020-2022 xsx All Rights Reserved.
* x-easypdf is licensed under Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
* http://license.coscl.org.cn/MulanPSL2
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PSL v2 for more details.
*
*/
public class XEasyPdfDocumentSplitter implements Serializable {
private static final long serialVersionUID = -1959028511245585789L;
/**
* pdfbox文档
*/
private final PDDocument document;
/**
* pdf文档
*/
private final XEasyPdfDocument pdfDocument;
/**
* 拆分文档列表
*/
private final List> documentList = new ArrayList<>(10);
/**
* 构造方法私有化
*/
XEasyPdfDocumentSplitter(XEasyPdfDocument pdfDocument) {
this.pdfDocument = pdfDocument;
this.document = this.pdfDocument.build(true);
}
/**
* 添加拆分文档
*
* @param pageIndex 拆分页面索引
* @return 返回pdf文档拆分器
*/
public XEasyPdfDocumentSplitter addDocument(int... pageIndex) {
this.documentList.add(XEasyPdfConvertUtil.toInteger(pageIndex));
return this;
}
/**
* 拆分文档
*
* @param outputPath 输出路径(目录)
* @return 返回pdf文档
*/
public XEasyPdfDocumentSplitter split(String outputPath) {
return this.split(outputPath, null);
}
/**
* 拆分文档
*
* @param outputPath 输出路径(目录)
* @param prefix 文档名称前缀
* @return 返回pdf文档
*/
@SneakyThrows
public XEasyPdfDocumentSplitter split(String outputPath, String prefix) {
// 如果文档名称前缀为空,则设置默认值为"x-easypdf"
if (prefix == null) {
// 初始化文档名称前缀
prefix = "x-easypdf";
}
// 文件名称构造器
StringBuilder fileNameBuilder;
// 如果拆分文档列表不为空,则使用拆分文档列表进行拆分,否则按单页面拆分
if (!this.documentList.isEmpty()) {
// 遍历拆分页面列表
for (int i = 0, count = this.documentList.size(); i < count; i++) {
// 新建文件名称构造器
fileNameBuilder = new StringBuilder();
// 构建文件名称
fileNameBuilder.append(outputPath).append(File.separator).append(prefix).append(i + 1).append(".pdf");
// 获取输出流
try (OutputStream outputStream = new BufferedOutputStream(Files.newOutputStream(XEasyPdfFileUtil.createDirectories(Paths.get(fileNameBuilder.toString()))))) {
// 拆分文档
this.split(outputStream, XEasyPdfConvertUtil.toInt(this.documentList.get(i)));
}
}
}
// 按单页面拆分
else {
// 定义拆分文档列表索引
int index = 1;
// 获取pdfbox页面树
PDPageTree pageTree = this.document.getPages();
// 遍历页面树
for (PDPage sourcePage : pageTree) {
// 创建任务
PDDocument target = new PDDocument();
// 添加页面
PDPage importPage = target.importPage(sourcePage);
// 添加页面资源
importPage.setResources(sourcePage.getResources());
// 新建文件名称构造器
fileNameBuilder = new StringBuilder();
// 构建文件名称
fileNameBuilder.append(outputPath).append(File.separator).append(prefix).append(index).append(".pdf");
// 获取输出流
try (OutputStream outputStream = new BufferedOutputStream(Files.newOutputStream(XEasyPdfFileUtil.createDirectories(Paths.get(fileNameBuilder.toString()))))) {
// 替换总页码占位符
this.pdfDocument.replaceTotalPagePlaceholder(target, false);
// 设置基础信息(文档信息、保护策略、版本、xmp信息及书签)
this.pdfDocument.setBasicInfo(target);
// 保存文档
target.save(outputStream);
// 关闭文档
target.close();
}
// 拆分文档列表索引自增
index++;
}
}
return this;
}
/**
* 拆分文档
*
* @param outputStream 输出流
* @param pageIndex 页面索引
* @return 返回pdf文档
*/
@SneakyThrows
public XEasyPdfDocumentSplitter split(OutputStream outputStream, int... pageIndex) {
// 新建任务文档
try (PDDocument target = new PDDocument()) {
// 获取源文档页面树
PDPageTree sourcePages = this.document.getPages();
// 遍历页面索引
for (int index : pageIndex) {
// 获取源文档页面
PDPage pdPage = sourcePages.get(index);
// 任务文档添加页面
PDPage importPage = target.importPage(pdPage);
// 设置页面资源缓存
importPage.setResources(pdPage.getResources());
}
// 替换总页码占位符
this.pdfDocument.replaceTotalPagePlaceholder(target, false);
// 设置基础信息(文档信息、保护策略、版本、xmp信息及书签)
this.pdfDocument.setBasicInfo(target);
// 保存任务文档
target.save(outputStream);
// 关闭文档
}
return this;
}
/**
* 完成操作
*
* @return 返回pdf文档
*/
public XEasyPdfDocument finish() {
return this.pdfDocument;
}
}
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