如何创建pdf文件并通过邮件发送spring boot应用程序

创建PDF文件并通过邮件发送Spring Boot应用程序可以通过以下步骤完成：

导入相关依赖：在Spring Boot项目的pom.xml文件中添加Apache PDFBox和JavaMailSender的依赖。

<dependencies>
    <!-- Apache PDFBox -->
    <dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox</artifactId>
        <version>2.0.26</version>
    </dependency>
    <!-- JavaMailSender -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-mail</artifactId>
    </dependency>
</dependencies>

创建PDF文件：使用Apache PDFBox库创建一个PDF文件，并将需要的内容添加到文件中。可以使用PDFBox提供的API来创建文本、图像、表格等元素。

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 java.io.IOException;

public class PdfCreator {
    public static void createPdf(String filePath, String content) throws IOException {
        PDDocument document = new PDDocument();
        PDPage page = new PDPage();
        document.addPage(page);

        PDPageContentStream contentStream = new PDPageContentStream(document, page);
        contentStream.setFont(PDType1Font.HELVETICA_BOLD, 12);
        contentStream.beginText();
        contentStream.newLineAtOffset(25, 700);
        contentStream.showText(content);
        contentStream.endText();
        contentStream.close();

        document.save(filePath);
        document.close();
    }
}

发送邮件：使用JavaMailSender发送包含PDF文件的邮件。需要配置邮件服务器的相关信息，如SMTP服务器地址、端口号、发件人邮箱、密码等。

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;

@Component
public class EmailSender {
    @Autowired
    private JavaMailSender mailSender;

    public void sendEmailWithAttachment(String recipientEmail, String subject, String body, String filePath) throws MessagingException {
        MimeMessage message = mailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message, true);

        helper.setTo(recipientEmail);
        helper.setSubject(subject);
        helper.setText(body);

        File attachment = new File(filePath);
        helper.addAttachment(attachment.getName(), attachment);

        mailSender.send(message);
    }
}

在Spring Boot应用程序中调用上述方法：在需要创建PDF文件并发送邮件的地方，调用PdfCreator.createPdf()方法创建PDF文件，然后调用EmailSender.sendEmailWithAttachment()方法发送邮件。

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import javax.mail.MessagingException;
import java.io.IOException;

@SpringBootApplication
public class Application {
    @Autowired
    private PdfCreator pdfCreator;

    @Autowired
    private EmailSender emailSender;

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }

    public void createAndSendPdf() {
        try {
            String filePath = "path/to/pdf/file.pdf";
            String content = "This is the content of the PDF file.";

            pdfCreator.createPdf(filePath, content);

            String recipientEmail = "recipient@example.com";
            String subject = "PDF File";
            String body = "Please find the attached PDF file.";

            emailSender.sendEmailWithAttachment(recipientEmail, subject, body, filePath);
        } catch (IOException | MessagingException e) {
            e.printStackTrace();
        }
    }
}

请注意，上述代码仅为示例，实际使用时需要根据具体需求进行适当修改和调整。另外，为了发送邮件，还需要在Spring Boot的配置文件中配置邮件服务器相关信息。