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我想发送一个通过java代码生成的报告。我正在使用碧玉报告来生成各种报告。在我的报告中，我在标题中有图片。这适用于HTML以外的所有报告格式（PDF，XLS，RTF）。它不会在HTML报告中显示图像，因为它无法找到图像。在JAVA中怎么发送用于html的图像作为邮件的附件？
如何使用电子邮件发送图像并使用HTML邮件使用Java邮件？下面
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回答
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拥有所有你需要发送附件等帮了我很大的，当我做我的JavaMail的客户端：Send Email's Java这在这里：Java Sending Embedded images in JavaMail这里Sending HTML Email with images似乎在你的方向指向更多。
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非常感谢你的回复..我会试试这个.. – DMS
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，可以使用绝对URL（如http://servername.com/images/xyz.jpg）代替相对URL。 JasperReport可以配置为使用绝对URL。
或
我不知道这是否适用于嵌入式电子邮件。但你可以尝试使用内嵌图像，你必须将你的图像转换为base64字符串。如果图像太大，并且在图像更改时难以维护，这会增加HTML的大小。
<img src="data:image/gif;base64,R0lGODlhEAAOALMAAOazToeHh0tLS/7LZv/0jvb29t/f3//Ub/ /ge8WSLf/rhf/3kdbW1mxsbP//mf///yH5BAAAAAAALAAAAAAQAA4AAARe8L1Ekyky67QZ1hLnjM5UUde0ECwLJoExKcppV0aCcGCmTIHEIUEqjgaORCMxIC6e0CcguWw6aFjsVMkkIr7g77ZKPJjPZqIyd7sJAgVGoEGv2xsBxqNgYPj/gAwXEQA7" width="16" height="14" alt="embedded folder icon">
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使用带有嵌入式图像和附件的JavaMail发送html电子邮件。 （我的最后一篇文章被删除了，因为它是一个链接（https://github.com/QuickrWorld/email-sender.git）。我认为这个观点是有效的 - 如果git存储库被删除或修改太多以至于它不再是有效的答案？）。所以我直接在下面的回复中添加了代码。尽管如此，我仍然想知道为什么我的答案被单独删除。在这篇文章中的其他答案也只是链接。或者我错过了什么？）
// EmailSender.java
package com.quickrworld.mail;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.URLDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
public class EmailSender {
static Properties p = null;
static Properties getDefaultProperties() {
if (p == null) {
p = new Properties();
String mailSmtpHost = "smtp.gmail.com";
String mailSmtpAuth = "true";
String mailSmtpPort = "465";
String mailSmtpSocketFactoryPort = "465";
String mailSmtpSocketFactoryClass = "javax.net.ssl.SSLSocketFactory";
String mailSmtpSocketFactoryFallback = "false";
String mailDebug = "false";
p.put("mail.smtp.host", mailSmtpHost);
p.put("mail.smtp.auth", mailSmtpAuth);
p.put("mail.smtp.port", mailSmtpPort);
p.put("mail.smtp.socketFactory.port", mailSmtpSocketFactoryPort);
p.put("mail.smtp.socketFactory.class", mailSmtpSocketFactoryClass);
p.put("mail.smtp.socketFactory.fallback",
mailSmtpSocketFactoryFallback);
// p.put("mail.smtp.starttls.enable","true");
// p.put("mail.smtp.EnableSSL.enable","true");
p.put("mail.debug", mailDebug);
}
return p;
}
public void sendMessage(
String mailSubject,
String mailFrom,
List<String> mailTos,
List<String> mailCcs,
List<String> mailBccs,
String html,
List<ImageResource> images,
List<Resource> attachments,
Properties p,
String user,
String password) throws MessagingException, MalformedURLException {
Session s = Session.getInstance(p);
Message m = new MimeMessage(s);
m.setSubject(mailSubject);
InternetAddress from = new InternetAddress(mailFrom);
for (String mailTo : mailTos) {
InternetAddress to = new InternetAddress(mailTo);
m.addRecipient(Message.RecipientType.TO, to);
}
for (String mailCc : mailCcs) {
InternetAddress cc = new InternetAddress(mailCc);
m.addRecipient(Message.RecipientType.CC, cc);
}
for (String mailBcc : mailBccs) {
InternetAddress bcc = new InternetAddress(mailBcc);
m.addRecipient(Message.RecipientType.BCC, bcc);
}
m.setFrom(from);
Multipart multipart = new MimeMultipart("related");
// html
BodyPart htmlPart = new MimeBodyPart();
htmlPart.setContent(html, "text/html");
multipart.addBodyPart(htmlPart);
// images
for (ImageResource imageResource : images) {
String path = imageResource.getPath();
String fileName = imageResource.getName();
String cid = imageResource.getCid();
boolean isURL = imageResource.isURL();
addImageWithCid(multipart, path, fileName, cid, isURL);
}
// attachments
for (Resource attachment : attachments) {
addAttachment(multipart, attachment);
}
// message
m.setContent(multipart);
// send
Transport transport = s.getTransport("smtp");
transport.connect(user, password);
transport.sendMessage(m, m.getAllRecipients()); // Actually this can be any valid address set
transport.close();
}
private void addAttachment(Multipart multipart,
Resource attachment) throws MessagingException, MalformedURLException {
String attachmentPath = attachment.getPath();
String attachmentName = attachment.getName();
boolean isURL = attachment.isURL();
if(isURL) {
BodyPart attachmentBodyPart = new MimeBodyPart();
URL attachmentURL = new URL(attachmentPath);
URLDataSource source = new URLDataSource(attachmentURL);
attachmentBodyPart.setDataHandler(new DataHandler(source));
attachmentBodyPart.setFileName(attachmentName);
multipart.addBodyPart(attachmentBodyPart);
} else {
BodyPart attachmentBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(attachmentPath);
attachmentBodyPart.setDataHandler(new DataHandler(source));
attachmentBodyPart.setFileName(attachmentName);
multipart.addBodyPart(attachmentBodyPart);
}
}
private void addImageWithCid(
Multipart multipart,
String imageFilePath,
String imageFileName,
String imageFileCid,
boolean isURL) throws MessagingException, MalformedURLException {
if(isURL) {
BodyPart imgPart = new MimeBodyPart();
URL imageFileURL = new URL(imageFilePath);
URLDataSource ds = new URLDataSource(imageFileURL);
imgPart.setDataHandler(new DataHandler(ds));
imgPart.setHeader("Content-ID", imageFileCid);
imgPart.setFileName(imageFileName);
multipart.addBodyPart(imgPart);
} else {
BodyPart imgPart = new MimeBodyPart();
DataSource ds = new FileDataSource(imageFilePath);
imgPart.setDataHandler(new DataHandler(ds));
imgPart.setHeader("Content-ID", imageFileCid);
imgPart.setFileName(imageFileName);
multipart.addBodyPart(imgPart);
}
}
}
// Resource.java
package com.quickrworld.mail;
public class Resource {
private String path;
private String name;
private boolean isURL;
public Resource() {
}
public Resource(String path, boolean isURL) {
this(path, path, isURL);
}
public Resource(String path, String name, boolean isURL) {
this.path = path;
this.name = name;
this.isURL = isURL;
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public boolean isURL() {
return isURL;
}
public void setURL(boolean isURL) {
this.isURL = isURL;
}
}
// ImageResource.java
package com.quickrworld.mail;
public class ImageResource extends Resource {
private String cid;
public ImageResource() {
super();
}
public ImageResource(String path, String name, String cid, boolean isURL) {
super(path, name, isURL);
this.cid = cid;
}
public String getCid() {
return cid;
}
public void setCid(String cid) {
this.cid = cid;
}
}
// EmailMain.java
package com.quickrworld.mail;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import javax.mail.MessagingException;
public class EmailMain {
// Please ensure you have a tomcat running on port 8080 on localhost (for tomcat.png and favicon.ico)
// please ensure you have files file1.txt and file2.txt in the working directory (for attachments)
public static void main(String[] args) {
EmailSender emailSender = new EmailSender();
String mailSubject = "My Mail Subject (Named)";
String mailFrom = "[email protected]";
List<String> mailTos = new ArrayList<String>();
mailTos.add("[email protected]");
List<String> mailCcs = new ArrayList<String>();
mailCcs.add("[email protected]cs.com");
List<String> mailBccs = new ArrayList<String>();
mailBccs.add("[email protected]");
String html = "<html><body><h2>Heading</h2>Our logo:<br/>"
+ "<img src=\"cid:img-cid-1\"/><br/>See images in the email - and two attachments<br/>"
+ "<div><img src=\"cid:img-cid-2\"/></div></body></html>";
// remove the values for user and password before posting to git
String user = "[email protected]";
String password = "password";
Properties p = EmailSender.getDefaultProperties();
p.put("mail.debug", "true");
List<ImageResource> imageResources = new ArrayList<ImageResource>();
imageResources.add(new ImageResource("logo.png","logo.png","<img-cid-1>",false));
imageResources.add(new ImageResource("http://localhost:8080/favicon.ico","favicon.ico","<img-cid-2>",true));
List<Resource> attachmentResources = new ArrayList<Resource>();
attachmentResources.add(new Resource("file1.txt", "attached-file1.txt", false));
attachmentResources.add(new Resource("file2.txt", "attached-file2.txt", false));
attachmentResources.add(new Resource("http://localhost:8080/tomcat.gif","attached-tomcat.gif",true));
try {
emailSender.sendMessage(mailSubject, mailFrom, mailTos, mailCcs,
mailBccs, html, imageResources,
attachmentResources, p, user, password);
} catch (MessagingException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
}
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你用什么库发送这些电子邮件？ – biziclop
我正在使用javax.mail – DMS