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Merge pull request #10554 from rvsathe/master 

Hexagonal Architecture code Reshma sathe
This commit is contained in:
Eric Martin 2021-05-27 19:29:55 -05:00 committed by GitHub
parent 2a9d69a5fc 207bcad90e
commit c5582303e8
3 changed files with 156 additions and 6 deletions
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25
core-java-modules/core-java-networking-3/pom.xml
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@ -36,16 +36,29 @@
<version>${assertj.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.2</version>
</dependency>
</dependencies>
<build>
<finalName>core-java-networking-3</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
</plugin>
</plugins>
</pluginManagement>
</build>
<properties>

112
core-java-modules/core-java-networking-3/src/main/java/com/baeldung/downloadattachments/DownloadEmailAttachments.java Normal file
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@ -0,0 +1,112 @@
package com.baeldung.downloadattachments;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.Store;
import javax.mail.internet.MimeBodyPart;
public class DownloadEmailAttachments {
private String downloadDirectory;
public void setSaveDirectory(String dir) {
this.downloadDirectory = dir;
}
public void downloadEmailAttachments(String host, String port, String userName, String password) throws NoSuchProviderException, MessagingException, IOException {
Properties properties = setMailServerProperties(host, port);
Store store = setSessionStoreProperties(userName, password, properties);
Folder inbox = store.getFolder("INBOX");
inbox.open(Folder.READ_ONLY);
Message[] arrayMessages = inbox.getMessages();
for (int i = 0; i < arrayMessages.length; i++) {
Message message = arrayMessages[i];
Address[] fromAddress = message.getFrom();
String from = fromAddress[0].toString();
String subject = message.getSubject();
String sentDate = message.getSentDate().toString();
List<String> attachments = new ArrayList<String>();
if (message.getContentType().contains("multipart")) {
attachments = downloadAttachments(message);
}
System.out.println("Message #" + (i + 1) + ":");
System.out.println(" From: " + from);
System.out.println(" Subject: " + subject);
System.out.println(" Sent Date: " + sentDate);
System.out.println(" Attachments: " + attachments);
}
inbox.close(false);
store.close();
}
public List<String> downloadAttachments(Message message) throws IOException, MessagingException {
List<String> downloadedAttachments = new ArrayList<String>();
Multipart multiPart = (Multipart) message.getContent();
int numberOfParts = multiPart.getCount();
for (int partCount = 0; partCount < numberOfParts; partCount++) {
MimeBodyPart part = (MimeBodyPart) multiPart.getBodyPart(partCount);
if (Part.ATTACHMENT.equalsIgnoreCase(part.getDisposition())) {
String file = part.getFileName();
part.saveFile(downloadDirectory + File.separator + part.getFileName());
downloadedAttachments.add(file);
}
}
return downloadedAttachments;
}
public Store setSessionStoreProperties(String userName, String password, Properties properties) throws NoSuchProviderException, MessagingException {
Session session = Session.getDefaultInstance(properties);
Store store = session.getStore("pop3");
store.connect(userName, password);
return store;
}
public Properties setMailServerProperties(String host, String port) {
Properties properties = new Properties();
properties.put("mail.pop3.host", host);
properties.put("mail.pop3.port", port);
properties.setProperty("mail.pop3.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
properties.setProperty("mail.pop3.socketFactory.fallback", "false");
properties.setProperty("mail.pop3.socketFactory.port", String.valueOf(port));
return properties;
}
public static void main(String[] args) {
String host = "pop.gmail.com";
String port = "995";
String userName = "your_email";
String password = "your_password";
String saveDirectory = "valid_folder_path";
DownloadEmailAttachments receiver = new DownloadEmailAttachments();
receiver.setSaveDirectory(saveDirectory);
try {
receiver.downloadEmailAttachments(host, port, userName, password);
} catch (NoSuchProviderException ex) {
System.out.println("No provider for pop3.");
ex.printStackTrace();
} catch (MessagingException ex) {
System.out.println("Could not connect to the message store");
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}

25
core-java-modules/core-java-networking-3/src/test/java/com/baeldung/downloadattachments/DownloadEmailAttachmentsLiveTest.java Normal file
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@ -0,0 +1,25 @@
package com.baeldung.downloadattachments;
import static org.junit.Assert.fail;
import org.junit.Test;
public class DownloadEmailAttachmentsLiveTest {
@Test
public void when_Run_then_downloadAttachments() {
String host = "pop.gmail.com";
String port = "995";
String userName = "your_email";
String password = "your_password";
String saveDirectory = "valid_folder_path";
DownloadEmailAttachments receiver = new DownloadEmailAttachments();
receiver.setSaveDirectory(saveDirectory);
try {
receiver.downloadEmailAttachments(host, port, userName, password);
} catch (Exception ex) {
fail("Exception: " + ex);
}
}
}