<!-- 添加依賴 -->
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itext7-core</artifactId>
    <version>7.1.15</version> <!-- 請(qǐng)檢查并使用最新版本 -->
</dependency>

import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.Document;
import com.itextpdf.layout.element.Paragraph;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class ITextPdfService {

    public void export(HttpServletResponse response) throws IOException {
        // 設(shè)置響應(yīng)頭
        response.setContentType("application/pdf");
        response.setHeader("Content-Disposition", "attachment; filename=users.pdf");

        try (PdfWriter writer = new PdfWriter(response.getOutputStream());
             PdfDocument pdf = new PdfDocument(writer);
             Document document = new Document(pdf)) {

            // 添加內(nèi)容到PDF
            document.add(new Paragraph("Hello, this is a PDF document created with iText in Spring Boot!"));

            // 關(guān)閉文檔
            document.close();
        }
    }
}

<!-- 添加依賴 -->
<dependency>
    <groupId>org.apache.pdfbox</groupId>
    <artifactId>pdfbox</artifactId>
    <version>2.0.27</version> <!-- 請(qǐng)檢查并使用最新版本 -->
</dependency>

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDType1Font;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class PdfBoxPdfService {

    public void export(HttpServletResponse response) throws IOException {
        // 設(shè)置響應(yīng)頭
        response.setContentType("application/pdf");
        response.setHeader("Content-Disposition", "attachment; filename=users.pdf");

        try (PDDocument document = new PDDocument()) {
            PDPage page = new PDPage();
            document.addPage(page);

            try (PDPageContentStream contentStream = new PDPageContentStream(document, page)) {
                contentStream.setFont(PDType1Font.HELVETICA_BOLD, 12);
                contentStream.beginText();
                contentStream.newLineAtOffset(100, 700);
                contentStream.showText("Hello, this is a PDF document created with Apache PDFBox in Spring Boot!");
                contentStream.endText();
            }

            // 將PDF寫入響應(yīng)輸出流
            document.save(response.getOutputStream());
        }
    }
}

<!-- 添加依賴 -->
<dependency>
    <groupId>net.sf.jasperreports</groupId>
    <artifactId>jasperreports</artifactId>
    <version>6.17.0</version> <!-- 請(qǐng)檢查并使用最新版本 -->
</dependency>

import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api")
public class JasperReportController {

    @GetMapping("/export-jasper-pdf")
    public void export(HttpServletResponse response) throws Exception {
        // 設(shè)置響應(yīng)頭
        response.setContentType("application/pdf");
        response.setHeader("Content-Disposition", "attachment; filename=report.pdf");

        // 加載JRXML模板
        InputStream reportTemplate = getClass().getResourceAsStream("/templates/report.jrxml");
        JasperReport jasperReport = JasperCompileManager.compileReport(reportTemplate);

        // 準(zhǔn)備數(shù)據(jù)
        List<User> users = userService.getAllUsers(); // 假設(shè)有一個(gè)UserService類
        JRBeanCollectionDataSource dataSource = new JRBeanCollectionDataSource(users);

        // 設(shè)置參數(shù)
        Map<String, Object> parameters = new HashMap<>();
        parameters.put("title", "User Report");

        // 生成PDF
        JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, dataSource);
        JasperExportManager.exportReportToPdfStream(jasperPrint, response.getOutputStream());
    }
}

<!-- 添加依賴 -->
<dependency>
    <groupId>org.thymeleaf</groupId>
    <artifactId>thymeleaf</artifactId>
    <version>3.0.12.RELEASE</version> <!-- 請(qǐng)檢查并使用最新版本 -->
</dependency>
<dependency>
    <groupId>org.xhtmlrenderer</groupId>
    <artifactId>flying-saucer-pdf-itext5</artifactId>
    <version>9.1.20</version> <!-- 請(qǐng)檢查并使用最新版本 -->
</dependency>

import org.springframework.core.io.ClassPathResource;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;
import org.xhtmlrenderer.pdf.ITextRenderer;

import javax.servlet.http.HttpServletResponse;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;

@RestController
@RequestMapping("/api")
public class PdfController {

    private final TemplateEngine templateEngine;

    public PdfController(TemplateEngine templateEngine) {
        this.templateEngine = templateEngine;
    }

    @GetMapping("/export-thymeleaf-pdf")
    public void export(HttpServletResponse response) throws Exception {
        // 設(shè)置響應(yīng)頭
        response.setContentType("application/pdf");
        response.setHeader("Content-Disposition", "attachment; filename=report.pdf");

        // 加載HTML模板
        InputStream templateInputStream = new ClassPathResource("templates/report.html").getInputStream();
        String htmlContent = new String(templateInputStream.readAllBytes(), StandardCharsets.UTF_8);

        // 準(zhǔn)備上下文數(shù)據(jù)
        Context context = new Context();
        context.setVariable("users", userService.getAllUsers()); // 假設(shè)有一個(gè)UserService類
        context.setVariable("title", "User Report");

        // 渲染HTML
        String processedHtml = templateEngine.process(htmlContent, context);

        // 將HTML轉(zhuǎn)換為PDF
        ITextRenderer renderer = new ITextRenderer();
        renderer.setDocumentFromString(processedHtml);
        renderer.layout();

        // 輸出PDF
        try (OutputStream outputStream = response.getOutputStream()) {
            renderer.createPDF(outputStream);
        }
    }
}