使用IMAP ( javamail API)从gmail访问电子邮件
使用IMAP ( javamail API)从gmail访问电子邮件
提问于 2012-02-13 23:53:07
我正尝试在JavaMail应用编程接口的帮助下，通过IMAP访问Gmail帐户中的电子邮件。我想知道为什么代码适用于一个电子邮件帐户，而不适用于另一个电子邮件帐户。
我可以访问两个电子邮件帐户的Inbox文件夹。但对于其中一个电子邮件帐户，无法访问SPAM([Gmail]/Spam)等其他文件夹，并抛出FolderNotFoundException异常。有人能解释一下出了什么问题吗？
提前谢谢你。
代码如下：
import java.io.*;
import java.util.*;
import javax.mail.*;
import javax.mail.Flags.Flag;
import javax.mail.internet.*;
import com.sun.mail.imap.IMAPFolder;
import com.sun.mail.imap.IMAPMessage;
public class FolderFetchIMAP {
public static void main(String[] args) throws MessagingException, IOException {
IMAPFolder folder = null;
Store store = null;
String subject = null;
Flag flag = null;
try
{
Properties props = System.getProperties();
props.setProperty("mail.store.protocol", "imaps");
Session session = Session.getDefaultInstance(props, null);
store = session.getStore("imaps");
store.connect("imap.googlemail.com","myemailid@gmail.com", "password");
folder = (IMAPFolder) store.getFolder("[Gmail]/Spam"); // This doesn't work for other email account
//folder = (IMAPFolder) store.getFolder("inbox"); This works for both email account
if(!folder.isOpen())
folder.open(Folder.READ_WRITE);
Message[] messages = folder.getMessages();
System.out.println("No of Messages : " + folder.getMessageCount());
System.out.println("No of Unread Messages : " + folder.getUnreadMessageCount());
System.out.println(messages.length);
for (int i=0; i < messages.length;i++)
{
System.out.println("*****************************************************************************");
System.out.println("MESSAGE " + (i + 1) + ":");
Message msg = messages[i];
//System.out.println(msg.getMessageNumber());
//Object String;
//System.out.println(folder.getUID(msg)
subject = msg.getSubject();
System.out.println("Subject: " + subject);
System.out.println("From: " + msg.getFrom()[0]);
System.out.println("To: "+msg.getAllRecipients()[0]);
System.out.println("Date: "+msg.getReceivedDate());
System.out.println("Size: "+msg.getSize());
System.out.println(msg.getFlags());
System.out.println("Body: \n"+ msg.getContent());
System.out.println(msg.getContentType());
}
}
finally
{
if (folder != null && folder.isOpen()) { folder.close(true); }
if (store != null) { store.close(); }
}
}
}回答 5
Stack Overflow用户
回答已采纳
发布于 2012-02-14 03:23:44
其中一个帐户是否使用了非英文UI？
Gmail文件夹名称根据用户本地化设置进行本地化。
目前，获取本地化文件夹名称的唯一方法是使用XLIST命令。
Stack Overflow用户
发布于 2014-03-11 12:19:31
package com.technicalkeeda;
import java.io.File;
import java.io.FileInputStream;
import java.util.Properties;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Store;
public class GmailInbox {
public static void main(String[] args) {
GmailInbox gmail = new GmailInbox();
gmail.read();
}
public void read() {
Properties props = new Properties();
try {
props.load(new FileInputStream(new File("C:\\smtp.properties")));
Session session = Session.getDefaultInstance(props, null);
Store store = session.getStore("imaps");
store.connect("smtp.gmail.com", "*************@gmail.com","your_password");
Folder inbox = store.getFolder("inbox");
inbox.open(Folder.READ_ONLY);
int messageCount = inbox.getMessageCount();
System.out.println("Total Messages:- " + messageCount);
Message[] messages = inbox.getMessages();
System.out.println("------------------------------");
for (int i = 0; i < 10; i++) {
System.out.println("Mail Subject:- " + messages[i].getSubject());
}
inbox.close(true);
store.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}Stack Overflow用户
发布于 2018-11-20 14:24:47
您可以尝试以下代码：
private List<String> getResult1(){
try {
Properties props = new Properties();
props.put("mail.store.protocol","imaps");
Session session = Session.getDefaultInstance(props, null);
Store store = session.getStore("imaps");
store.connect("imap.gmail.com", "Email Id", "App Password");
//if you want mail from specified folder, just change change folder name
//Folder inbox = store.getFolder("[Gmail]/Drafts");
Folder inbox = store.getFolder("inbox");
inbox.open(Folder.READ_ONLY);
int messageCount = inbox.getMessageCount();
Log.e("getFolder ", "getResult1: " + store.getDefaultFolder().list("*"));
javax.mail.Folder[] folders = store.getDefaultFolder().list("*");
for (javax.mail.Folder folder : folders) {
if ((folder.getType() & javax.mail.Folder.HOLDS_MESSAGES) != 0){
Log.e("getFolder ", "getResult1: " + folder.getName() );
}
}
Log.e("Mail Subject:", "Total Messages:-: " + messageCount );
javax.mail.Message[] messages = inbox.getMessages();
System.out.println("------------------------------");
Log.e("Mail Subject:", "messages: " + messages.toString());
for (int i = 0; i < messages.length; i++) {
Log.e("Mail Subject:", "getResult1: " + messages[i].getSubject());
}
inbox.close(true);
store.close();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/9263530
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