wiki.xsx.core.pdf.doc.XEasyPdfDocumentImager Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of x-easypdf Show documentation
Show all versions of x-easypdf Show documentation
A framework based on pdfbox
package wiki.xsx.core.pdf.doc;
import lombok.SneakyThrows;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.apache.pdfbox.rendering.RenderDestination;
import wiki.xsx.core.pdf.component.image.XEasyPdfImageType;
import wiki.xsx.core.pdf.util.XEasyPdfFileUtil;
import wiki.xsx.core.pdf.util.XEasyPdfImageUtil;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
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文档图像器
*
* @author xsx
* @date 2020/12/21
* @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 XEasyPdfDocumentImager implements Serializable {
private static final long serialVersionUID = 4542844990362703412L;
/**
* pdfbox文档
*/
private final PDDocument document;
/**
* pdf文档
*/
private final XEasyPdfDocument pdfDocument;
/**
* 图像DPI
*/
private Float dpi = 72F;
/**
* 渲染类型
*/
private RenderType renderType = RenderType.EXPORT;
/**
* 是否灰度
*/
private Boolean isGray = Boolean.FALSE;
/**
* 是否透明
*/
private Boolean isAlpha = Boolean.FALSE;
/**
* 是否合并
*/
private Boolean isMerge = Boolean.FALSE;
/**
* 是否水平合并
*/
private Boolean isHorizontalMerge = Boolean.FALSE;
/**
* 构造方法
*
* @param pdfDocument pdf文档
*/
XEasyPdfDocumentImager(XEasyPdfDocument pdfDocument) {
this.pdfDocument = pdfDocument;
this.document = this.pdfDocument.build(true);
}
/**
* 设置图像DPI
*
* @param dpi 图像DPI
* @return 返回pdf文档图像器
*/
public XEasyPdfDocumentImager setDpi(float dpi) {
this.dpi = Math.abs(dpi);
return this;
}
/**
* 设置渲染类型
*
* @param renderType 渲染类型
* @return 返回pdf文档图像器
*/
public XEasyPdfDocumentImager setRenderType(RenderType renderType) {
this.renderType = renderType;
return this;
}
/**
* 开启灰度
*
* @return 返回pdf文档图像器
*/
public XEasyPdfDocumentImager enableGray() {
this.isGray = Boolean.TRUE;
return this;
}
/**
* 开启透明
*
* @return 返回pdf文档图像器
*/
public XEasyPdfDocumentImager enableAlpha() {
this.isAlpha = Boolean.TRUE;
return this;
}
/**
* 开启水平合并
*
* @return 返回pdf文档图像器
*/
public XEasyPdfDocumentImager enableHorizontalMerge() {
this.isHorizontalMerge = Boolean.TRUE;
this.isMerge = Boolean.TRUE;
return this;
}
/**
* 开启垂直合并
*
* @return 返回pdf文档图像器
*/
public XEasyPdfDocumentImager enableVerticalMerge() {
this.isHorizontalMerge = Boolean.FALSE;
this.isMerge = Boolean.TRUE;
return this;
}
/**
* 转为图片(整个文档)
*
* @param outputPath 输出路径(目录)
* @param imageType 图片类型
* @return 返回pdf文档图像器
*/
@SneakyThrows
public XEasyPdfDocumentImager image(String outputPath, XEasyPdfImageType imageType) {
return this.image(outputPath, imageType, null);
}
/**
* 转为图片(整个文档)
*
* @param outputPath 输出路径(目录)
* @param imageType 图片类型
* @param prefix 图片名称前缀
* @return 返回pdf文档图像器
*/
@SneakyThrows
public XEasyPdfDocumentImager image(String outputPath, XEasyPdfImageType imageType, 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";
}
// 图片格式名称
String imageTypeName = imageType.name().toLowerCase();
// 初始化pdfBox文档渲染器
PDFRenderer renderer = new PDFRenderer(this.document);
// 设置渲染目的
renderer.setDefaultDestination(this.renderType.destination);
// 任务文档页面总数
int pageCount = this.document.getNumberOfPages();
// 如果合并图片,则合并后保存图片
if (this.isMerge) {
// 定义图片列表
List imageList = new ArrayList<>(pageCount);
// 遍历页面索引
for (int i = 0; i < pageCount; i++) {
// 添加图片列表
imageList.add(renderer.renderImageWithDPI(i, this.dpi, this.getColorType()));
}
// 拼接图片
BufferedImage bufferedImage = XEasyPdfImageUtil.join(imageList, this.isHorizontalMerge);
// 获取输出流
try (OutputStream outputStream = new BufferedOutputStream(Files.newOutputStream(XEasyPdfFileUtil.createDirectories(Paths.get(outputPath + File.separator + prefix + '.' + imageTypeName))))) {
// 写出图片
ImageIO.write(bufferedImage, imageTypeName, outputStream);
}
}
// 否则单页保存图片
else {
// 文件名称构造器
StringBuilder fileNameBuilder;
// 遍历页面索引
for (int i = 0; i < pageCount; 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('.').append(imageTypeName);
// 获取输出流
try (OutputStream outputStream = new BufferedOutputStream(Files.newOutputStream(XEasyPdfFileUtil.createDirectories(Paths.get(fileNameBuilder.toString()))))) {
// 渲染图片
BufferedImage bufferedImage = renderer.renderImageWithDPI(i, this.dpi, this.getColorType());
// 写出图片
ImageIO.write(bufferedImage, imageTypeName, outputStream);
}
}
}
return this;
}
/**
* 转为图片(根据页面索引)
*
* @param outputStream 输出流
* @param imageType 图片类型
* @param pageIndex 页面索引
* @return 返回pdf文档图像器
*/
@SneakyThrows
public XEasyPdfDocumentImager image(OutputStream outputStream, XEasyPdfImageType imageType, int... pageIndex) {
// 初始化pdfBox文档渲染器
PDFRenderer renderer = new PDFRenderer(this.document);
// 设置渲染目的
renderer.setDefaultDestination(this.renderType.destination);
// 如果合并图片,则合并后保存图片
if (this.isMerge) {
// 定义图片列表
List imageList = new ArrayList<>(pageIndex.length);
// 遍历页面索引
for (int index : pageIndex) {
// 添加图片列表
imageList.add(renderer.renderImageWithDPI(Math.min(Math.max(index, 0), this.document.getNumberOfPages() - 1), this.dpi, this.getColorType()));
}
// 拼接图片
BufferedImage bufferedImage = XEasyPdfImageUtil.join(imageList, this.isHorizontalMerge);
// 写出图片
ImageIO.write(bufferedImage, imageType.name().toLowerCase(), outputStream);
}
// 否则单页保存图片
else {
// 遍历页面索引
for (int index : pageIndex) {
// 渲染图片
BufferedImage bufferedImage = renderer.renderImageWithDPI(Math.min(Math.max(index, 0), this.document.getNumberOfPages() - 1), this.dpi, this.getColorType());
// 写出图片
ImageIO.write(bufferedImage, imageType.name().toLowerCase(), outputStream);
}
}
return this;
}
/**
* 完成操作
*
* @return 返回pdf文档
*/
public XEasyPdfDocument finish() {
return this.pdfDocument;
}
/**
* 渲染类型
*/
public enum RenderType {
/**
* 导出
*/
EXPORT(RenderDestination.EXPORT),
/**
* 显示
*/
VIEW(RenderDestination.VIEW),
/**
* 打印
*/
PRINT(RenderDestination.PRINT);
/**
* 目的
*/
private final RenderDestination destination;
/**
* 有参构造
*
* @param destination 目的
*/
RenderType(RenderDestination destination) {
this.destination = destination;
}
}
/**
* 获取颜色类型
*
* @return 返回颜色类型
*/
private ImageType getColorType() {
// 如果透明,则返回ARGB类型
if (this.isAlpha) {
// 返回ARGB类型
return ImageType.ARGB;
}
// 如果灰度,则返回GRAY类型
if (this.isGray) {
// 返回GRAY类型
return ImageType.GRAY;
}
// 返回RGB类型
return ImageType.RGB;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy