java - 使用 Gmail 发送电子邮件时在 Java 中设置发件人姓名

Question

我复制了“快速入门:发送 Gmail”中的代码，并对我的应用程序进行了一些修改。该代码似乎工作正常，只是无论我如何尝试都没有设置发件人的姓名。

这是我的完整代码:

import java.util.Arrays;
import java.util.Properties;

import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.auth.oauth2.GoogleOAuthConstants;
import com.google.api.client.googleapis.auth.oauth2.GoogleTokenResponse;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson.JacksonFactory;
import com.google.api.client.repackaged.org.apache.commons.codec.binary.Base64;
import com.google.api.services.gmail.Gmail;
import com.google.api.services.gmail.model.Message;

public class Test{
	private static final String SCOPE = "https://www.googleapis.com/auth/gmail.modify";
	private static final String APP_NAME = "XYZ";
	// Path to the client_secret.json file deloper Console
	private static final String CLIENT_SECRET_PATH = "src/testapp/auth_client.json";

	private static GoogleClientSecrets clientSecrets;
	private static GoogleAuthorizationCodeFlow flow;
	private static HttpTransport httpTransport;
	private static JsonFactory jsonFactory;
	private static Gmail service;

	public static String getRequestUrl() throws FileNotFoundException, IOException{
		httpTransport = new NetHttpTransport();
		jsonFactory = new JacksonFactory();
		
		clientSecrets = GoogleClientSecrets.load(jsonFactory, new FileReader(
				CLIENT_SECRET_PATH));
		
		// Allow user to authorize via url.
		flow = new GoogleAuthorizationCodeFlow.Builder(
				httpTransport, jsonFactory, clientSecrets, Arrays.asList(SCOPE))
		.setAccessType("online").setApprovalPrompt("auto").build();
		
		String url = flow.newAuthorizationUrl()
				.setRedirectUri(GoogleOAuthConstants.OOB_REDIRECT_URI).build();
		
		return url;
	}
	
	public static void sendMail(String to, String sub, String body) throws IOException, MessagingException {

		Message message = createMessageWithEmail(createEmail(to, "me", sub, body));
	    message = service.users().messages().send("me", message).execute();
	    
	    System.out.println("Message id: " + message.getId());
	    System.out.println(message.toPrettyString());
	}

	static void emailCredentialSetup(String code) throws IOException {
		// Generate Credential using retrieved code.
		GoogleTokenResponse response = flow.newTokenRequest(code)
				.setRedirectUri(GoogleOAuthConstants.OOB_REDIRECT_URI)
				.execute();
		GoogleCredential credential = new GoogleCredential()
				.setFromTokenResponse(response);

		// Create a new authorized Gmail API client
		service = new Gmail.Builder(httpTransport, jsonFactory,
				credential).setApplicationName(APP_NAME).build();
	}
	
	/**
	   * Create a MimeMessage using the parameters provided.
	   *
	   * @param to Email address of the receiver.
	   * @param from Email address of the sender, the mailbox account.
	   * @param subject Subject of the email.
	   * @param bodyText Body text of the email.
	   * @return MimeMessage to be used to send email.
	   * @throws MessagingException
	 * @throws UnsupportedEncodingException 
	   */
	  private static MimeMessage createEmail(String to, String from, String subject,
	      String bodyText) throws MessagingException, UnsupportedEncodingException {
	    Properties props = new Properties();
	    Session session = Session.getDefaultInstance(props, null);

	    MimeMessage email = new MimeMessage(session);

	    email.setFrom(new InternetAddress(from, "SPecial message"));
	    email.addRecipient(javax.mail.Message.RecipientType.TO,
	                       new InternetAddress(to));
	    email.setSubject(subject);
	    email.setText(bodyText);
	    return email;
	  }
	  
	  /**
	   * Create a Message from an email
	   *
	   * @param email Email to be set to raw of message
	   * @return Message containing base64 encoded email.
	   * @throws IOException
	   * @throws MessagingException
	   */
	  private static Message createMessageWithEmail(MimeMessage email)
	      throws MessagingException, IOException {
	    ByteArrayOutputStream baos = new ByteArrayOutputStream();
	    email.writeTo(baos);
	    String encodedEmail = Base64.encodeBase64URLSafeString(baos.toByteArray());
	    Message message = new Message();
	    message.setRaw(encodedEmail);
	    return message;
	  }
	  
	public static void main(String[] args) throws FileNotFoundException, IOException, MessagingException {
		System.out.println(getRequestUrl());
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		emailCredentialSetup(br.readLine());
		
		sendMail("myemail@gmail.com", "TEST1", "Hello");
	}
}

有人可以帮我将发件人姓名设置为自定义字符串吗？经过一些谷歌搜索后，我尝试将名称设置为“特殊消息”，但它不起作用。

Answer 1

从你正在做的代码看来:

  email.setFrom(new InternetAddress("me", "SPecial message"));

它试图在电子邮件标题中使用“我”作为电子邮件地址，但这是行不通的。您需要将其设置为用户的真实电子邮件地址，或者只是不提供“发件人” header 以使其自动设置。 (如果“发件人” header 中的电子邮件地址对于用户而言是错误的，则会删除整个 header 并设置一个有效的 header 。)