java - 如何以编程方式将电子邮件打印为 pdf

Question

<分区>

Answer 1

我找到了比我之前发布的解决方案更好的解决方案。将电子邮件保存为 html，然后使用 jtidy将其清理为 xhtml。最后使用 flying saucer html renderer将其保存为 pdf。

这是我写的一个例子:

import com.lowagie.text.DocumentException;
import org.w3c.tidy.Tidy;
import org.xhtmlrenderer.pdf.ITextRenderer;
import java.io.*;
import java.util.*;
import javax.mail.*;

public class Email2PDF {

public static void main(String[] args) {

    Properties props = new Properties();
    props.setProperty("mail.store.protocol", "imaps");
    try {
        Session session = Session.getInstance(props, null);
        Store store = session.getStore();
        //read your latest email
        store.connect("imap.gmail.com", "youremail@gmail.com", "password");
        Folder inbox = store.getFolder("INBOX");
        inbox.open(Folder.READ_ONLY);
        Message msg = inbox.getMessage(inbox.getMessageCount());
        Multipart mp = (Multipart) msg.getContent();
        BodyPart bp = mp.getBodyPart(0);
        String filename = msg.getSubject();
        FileOutputStream os = new FileOutputStream(filename + ".html");
        msg.writeTo(os);
        //use jtidy to clean up the html 
        cleanHtml(filename);
        //save it into pdf
        createPdf(filename);
    } catch (Exception mex) {
        mex.printStackTrace();
    }
}

public static void cleanHtml(String filename) {
    File file = new File(filename + ".html");
    InputStream in = null;
    try {
        in = new FileInputStream(file);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    OutputStream out = null;
    try {
        out = new FileOutputStream(filename + ".xhtml");
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    final Tidy tidy = new Tidy();
    tidy.setQuiet(false);
    tidy.setShowWarnings(true);
    tidy.setShowErrors(0);
    tidy.setMakeClean(true);
    tidy.setForceOutput(true);
    org.w3c.dom.Document document = tidy.parseDOM(in, out);
}
public static void createPdf(String filename)
        throws IOException, DocumentException {
    OutputStream os = new FileOutputStream(filename + ".pdf");
    ITextRenderer renderer = new ITextRenderer();
    renderer.setDocument(new File(filename + ".xhtml"));
    renderer.layout();
    renderer.createPDF(os) ;
    os.close();
    }
}

尽情享受吧!