需求：导出产品二维码PDF文件
1. Anchor设置页眉标题
工具包
/**
* @title PdfReport
* @description wms-parent
* @author slience_me
* @version 1.0.0
* @since 2023/1/13 14:08
*/
package xyz.slienceme.utils.pdf;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import com.itextpdf.text.pdf.draw.DottedLineSeparator;
import com.itextpdf.text.pdf.draw.LineSeparator;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Objects;
public class PdfReport {
// 定义全局的字体静态变量
private static Font titlefont;
private static Font headfont;
private static Font keyfont;
private static Font textfont;
// 最大宽度
private static int maxWidth = 520;
public void generateQRCodePDF(Document document, File filePath, File fontPath) throws Exception {
String filename = "SimHei.ttf";
File fontFile = new File(fontPath, filename);
BaseFont bfChinese = BaseFont.createFont(fontFile.getAbsolutePath(), BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
titlefont = new Font(bfChinese, 16, Font.BOLD);
Paragraph paragraph = new Paragraph("产品二维码导出", titlefont);
paragraph.setAlignment(1);
paragraph.setIndentationLeft(12);
paragraph.setIndentationRight(12);
paragraph.setFirstLineIndent(24);
paragraph.setLeading(20f);
paragraph.setSpacingBefore(5f);
paragraph.setSpacingAfter(10f);
Anchor anchor = new Anchor("设置页眉标题");
anchor.setReference("超链接");
PdfPTable table = createTable(new float[]{280, 280});//两列每个280
File[] files = filePath.listFiles();//文件列表
PdfPCell cell = new PdfPCell();
if (Objects.nonNull(files)){
System.out.println("生成二维码PDF文件, 总共:"+files.length+"个文件");
int i=1;
for (File file : files) {
System.out.print(i++); System.out.print("->");
Image image = Image.getInstance(file.getAbsolutePath());
image.setAlignment(Image.ALIGN_CENTER);
cell.setImage(image);
table.addCell(cell);
}
document.add(paragraph);
document.add(anchor);
document.add(table);
} else {
System.out.println("文件不存在!!");
}
}
/**
* 创建单元格(指定字体)
*
* @param value
* @param font
* @return
*/
public PdfPCell createCell(String value, Font font) {
PdfPCell cell = new PdfPCell();
cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
cell.setHorizontalAlignment(Element.ALIGN_CENTER);
cell.setPhrase(new Phrase(value, font));
return cell;
}
/**
* 创建指定列宽、列数的表格
*
* @param widths
* @return
*/
public PdfPTable createTable(float[] widths) {
PdfPTable table = new PdfPTable(widths);
try {
table.setTotalWidth(maxWidth);
table.setLockedWidth(true);
table.setHorizontalAlignment(Element.ALIGN_CENTER);
table.getDefaultCell().setBorder(1);
} catch (Exception e) {
e.printStackTrace();
}
return table;
}
}
调用并下载功能
@Override
public void generatePdf(HttpServletRequest request, HttpServletResponse response, File imagePath, File pdfPath, File fontPath) throws Exception {
String date = DateUtil.getDate("yyyyMMddHHmmss");
String fileName = "文件名称" + date + ".pdf";
try {
Document document = new Document(PageSize.A4);
File file = new File(pdfPath.getAbsolutePath().replace("\\", "/") + "/" + "文件名称.pdf");
file.createNewFile();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(file));
writer.setPageEvent(new Watermark("slience_me"));// 水印
writer.setPageEvent(new MyHeaderFooter(fontPath));// 页眉/页脚
document.open();
document.addTitle("QRCode导出文件");// 标题
document.addAuthor("slience_me");// 作者
document.addSubject("QRCode导出文件");// 主题
document.addKeywords("QRCode导出文件");// 关键字
document.addCreator("slience_me");// 创建者
PdfReport pdfReport = new PdfReport();
pdfReport.generateQRCodePDF(document, imagePath, fontPath);
document.close();
FileInputStream fileInputStream = new FileInputStream(file);
InputStream fis = new BufferedInputStream(fileInputStream);
byte[] buffer = new byte[fis.available()];
fis.read(buffer);
fis.close();
response.reset();
response.setCharacterEncoding("UTF-8");
//Content-Disposition的作用：告知浏览器以何种方式显示响应返回的文件，用浏览器打开还是以附件的形式下载到本地保存
//attachment表示以附件方式下载 inline表示在线打开 "Content-Disposition: inline; filename=文件名.mp3"
// filename表示文件的默认名称，因为网络传输只支持URL编码的相关支付，因此需要将文件名URL编码后进行传输,前端收到后需要反编码才能获取到真正的名称
response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
// 告知浏览器文件的大小
response.addHeader("Content-Length", "" + file.length());
OutputStream outputStream = new BufferedOutputStream(response.getOutputStream());
response.setContentType("application/octet-stream");
outputStream.write(buffer);
outputStream.flush();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* @title Watermark
* @description wms-parent
* @author slience_me
* @version 1.0.0
* @since 2023/1/13 14:10
*/
package xyz.slienceme.utils.pdf;
import com.itextpdf.text.Document;
import com.itextpdf.text.Element;
import com.itextpdf.text.Font;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.pdf.ColumnText;
import com.itextpdf.text.pdf.GrayColor;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfWriter;
public class Watermark extends PdfPageEventHelper {
Font FONT = new Font(Font.FontFamily.HELVETICA, 30, Font.BOLD, new GrayColor(0.95f));
private String waterCont;//水印内容
public Watermark(String waterCont) {
this.waterCont = waterCont;
}
@Override
public void onEndPage(PdfWriter writer, Document document) {
for (int i = 0; i < 5; i++) {
for (int j = 0; j < 5; j++) {
ColumnText.showTextAligned(writer.getDirectContentUnder(),
Element.ALIGN_CENTER,
new Phrase(this.waterCont == null ? "HELLO WORLD" : this.waterCont, FONT),
(50.5f + i * 350),
(40.0f + j * 150),
writer.getPageNumber() % 2 == 1 ? 45 : -45);
}
}
}
}
/**
* @title MyHeaderFooter
* @description wms-parent
* @author slience_me
* @version 1.0.0
* @since 2023/1/13 14:10
*/
package xyz.slienceme.utils.pdf;
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import java.io.File;
import java.io.IOException;
public class MyHeaderFooter extends PdfPageEventHelper {
// 总页数
PdfTemplate totalPage;
Font hfFont;
public MyHeaderFooter(File fontPath) {
String filename = "SimHei.ttf";
File fontFile = new File(fontPath, filename);
hfFont = FontFactory.getFont(fontFile.getAbsolutePath(), BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED,10f, Font.NORMAL, BaseColor.BLACK);
}
// 打开文档时，创建一个总页数的模版
public void onOpenDocument(PdfWriter writer, Document document) {
PdfContentByte cb = writer.getDirectContent();
totalPage = cb.createTemplate(30, 16);
}
// 一页加载完成触发，写入页眉和页脚
public void onEndPage(PdfWriter writer, Document document) {
PdfPTable table = new PdfPTable(3);
try {
table.setTotalWidth(PageSize.A4.getWidth() - 100);
table.setWidths(new int[]{24, 24, 3});
table.setLockedWidth(true);
table.getDefaultCell().setFixedHeight(-10);
table.getDefaultCell().setBorder(Rectangle.BOTTOM);
table.addCell(new Paragraph("大标题", hfFont));// 可以直接使用addCell(str)，不过不能指定字体，中文无法显示
table.getDefaultCell().setHorizontalAlignment(Element.ALIGN_RIGHT);
table.addCell(new Paragraph("第" + writer.getPageNumber() + "页/", hfFont));
// 总页数
PdfPCell cell = new PdfPCell(Image.getInstance(totalPage));
cell.setBorder(Rectangle.BOTTOM);
table.addCell(cell);
// 将页眉写到document中，位置可以指定，指定到下面就是页脚
table.writeSelectedRows(0, -1, 50, PageSize.A4.getHeight() - 20, writer.getDirectContent());
} catch (Exception de) {
throw new ExceptionConverter(de);
}
}
// 全部完成后，将总页数的pdf模版写到指定位置
public void onCloseDocument(PdfWriter writer, Document document) {
String text = "总" + (writer.getPageNumber()) + "页";
ColumnText.showTextAligned(totalPage, Element.ALIGN_LEFT, new Paragraph(text, hfFont), 2, 2, 0);
}
}
导出效果
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