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我知道getFrom()
返回「From」屬性。getFrom()[0])中[0]的用法是什麼,用於獲取郵件發件人地址
並且如果「Sender」頭部字段不存在,則返回null
。此實現使用getHeader
方法獲取必需的標題字段。
但爲什麼使用[0]與getFrom()
。使用[1]拋出異常「ArrayIndexOutOfBoundsException異常:1」
import javax.mail.*;
import javax.mail.internet.MimeMessage;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;
public class VerifyEmails {
public Message message;
public int count;
public String result;
public void check(String host, String user, String password) throws IOException, MessagingException {
Properties properties = new Properties();
properties.put("mail.imap.host", host);
properties.put("mail.imap.user", user);
properties.put("mail.imap.port", "143");
properties.put("mail.imap.starttls.enable", "false");
Session emailSession = Session.getInstance(properties);
Store store = emailSession.getStore("imap");
store.connect(host, user, password);
Folder emailFolder = store.getFolder("INBOX");
emailFolder.open(Folder.READ_ONLY);
Message[] messages = emailFolder.getMessages();
System.out.println("Total messages are---" + messages.length);
for (count = 0; count < messages.length; count++) {
message = messages[count];
System.out.println("---------------------------------");
System.out.println("Email Number " + (count + 1));
System.out.println("Subject: " + message.getSubject());
System.out.println("From: " + message.getFrom()[0]);
InputStream in = messages[count].getInputStream();
StringBuilder sb = new StringBuilder();
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String read;
while ((read = br.readLine()) != null) {
sb.append(read);
}
br.close();
String mailSource = sb.toString();
System.out.println("mailSource is" + mailSource);
}
}
'getFrom'返回什麼類型的變量? –
你在說什麼課? –
你可以添加包含import語句的代碼嗎? –