英文:
How to configure Java Application to send Email with Gmail service using OAUTH2?
问题
我已配置了我的Java应用程序使用OAUTH2，但出现了错误。请问有人能提供解决方案吗？
以下是代码部分：
public static void main(String args[]) {
String TOKEN_URL = "https://www.googleapis.com/oauth2/v4/token";
String oauthClientId = "558561226799-6nvqdl1kabh863g1a1184t3t7fcvu82e.apps.googleusercontent.com";
String oauthSecret = "UAPodrF7mIAverk_-A8wlWyL";
String refreshToken = "1//0gyh0jPCTq5GSCgYIARAAGBASNwF-L9IrGNizcIn4l4tGhlORji0X6zqFsV4rsB-niM1lNtJa9nVedsTWWPBt9Uuj8pOPcHNrpfc";
String accessToken = "ya29.a0Ae4lvC2p0j2MK6Wv5CcXvcB9VwJmukivtY7M6y6ZBntBdIls5XAXe4TCjt9zr5VuWolB0CdRJjL6UBIz5mqj63KvNxjAYU0DeNsZGbWrz7daP624ruvM-DYsvHSUx1jrUcudiUDF2YhQc3lHH8WXrAhanWIBakI170w";
long tokenExpires = 1458168133864L;
String username = "bittu9601164625@gmail.com";
if (System.currentTimeMillis() > tokenExpires) {
try {
String request = "client_id=" + URLEncoder.encode(oauthClientId, "UTF-8")
+ "&client_secret=" + URLEncoder.encode(oauthSecret, "UTF-8")
+ "&refresh_token=" + URLEncoder.encode(refreshToken, "UTF-8")
+ "&grant_type=refresh_token";
HttpURLConnection conn = (HttpURLConnection) new URL(TOKEN_URL).openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
PrintWriter out = new PrintWriter(conn.getOutputStream());
out.print(request);
out.flush();
out.close();
conn.connect();
try {
HashMap<String, Object> result;
result = new ObjectMapper().readValue(conn.getInputStream(), new TypeReference<HashMap<String, Object>>() {
});
accessToken = (String) result.get("access_token");
tokenExpires = System.currentTimeMillis() + (((Number) result.get("expires_in")).intValue() * 1000);
} catch (IOException e) {
// Error handling code here
}
} catch (Exception e) {
// Error handling code here
}
}
String mailUsername = "bittu9601164625@gmail.com";
Properties props = new Properties();
props.put("mail.smtp.ssl.enable", "true");
props.put("mail.smtp.auth.mechanisms", "XOAUTH2");
try {
// Sending email code here
} catch (AddressException e) {
// Error handling code here
} catch (NoSuchProviderException e) {
// Error handling code here
} catch (MessagingException e) {
// Error handling code here
}
}
下面是我得到的错误信息，我没有将主机名设置为localhost或任何端口号，connect方法是否不起作用？
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
nested exception is:
java.net.ConnectException: Connection refused (Connection refused)
...
Caused by: java.net.ConnectException: Connection refused (Connection refused)
...
Process finished with exit code 0
请有人告诉我我做错了什么。如果有其他解决方案，将不胜感激。
英文:
I have configured my Java Application using OAUTH2 but it is giving me error. Can someone please suggest me a solution ?'
Below is the code:
public static void main (String args[]){
String TOKEN_URL = "https://www.googleapis.com/oauth2/v4/token";
String oauthClientId = "558561226799-6nvqdl1kabh863g1a1184t3t7fcvu82e.apps.googleusercontent.com";
String oauthSecret = "UAPodrF7mIAverk_-A8wlWyL";
String refreshToken = "1//0gyh0jPCTq5GSCgYIARAAGBASNwF-L9IrGNizcIn4l4tGhlORji0X6zqFsV4rsB-niM1lNtJa9nVedsTWWPBt9Uuj8pOPcHNrpfc";
String accessToken = "ya29.a0Ae4lvC2p0j2MK6Wv5CcXvcB9VwJmukivtY7M6y6ZBntBdIls5XAXe4TCjt9zr5VuWolB0CdRJjL6UBIz5mqj63KvNxjAYU0DeNsZGbWrz7daP624ruvM-DYsvHSUx1jrUcudiUDF2YhQc3lHH8WXrAhanWIBakI170w";
long tokenExpires = 1458168133864L;
String username="bittu9601164625@gmail.com";
if (System.currentTimeMillis() > tokenExpires) {
try {
String request = "client_id=" + URLEncoder.encode(oauthClientId, "UTF-8")
+ "&client_secret=" + URLEncoder.encode(oauthSecret, "UTF-8")
+ "&refresh_token=" + URLEncoder.encode(refreshToken, "UTF-8")
+ "&grant_type=refresh_token";
HttpURLConnection conn = (HttpURLConnection) new URL(TOKEN_URL).openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
PrintWriter out = new PrintWriter(conn.getOutputStream());
out.print(request); // note: println causes error
out.flush();
out.close();
conn.connect();
try {
HashMap<String, Object> result;
result = new ObjectMapper().readValue(conn.getInputStream(), new TypeReference<HashMap<String, Object>>() {
});
accessToken = (String) result.get("access_token");
tokenExpires = System.currentTimeMillis() + (((Number) result.get("expires_in")).intValue() * 1000);
} catch (IOException e) {
String line;
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
while ((line = in.readLine()) != null) {
System.out.println(line);
}
System.out.flush();
}
} catch (Exception e) {
e.printStackTrace();
}
}
String mailUsername = "bittu9601164625@gmail.com";
Properties props = new Properties();
props.put("mail.smtp.ssl.enable", "true"); // required for Gmail
props.put("mail.smtp.auth.mechanisms", "XOAUTH2");
try {
Session session = Session.getInstance(props);
Message msg = new MimeMessage(session);
msg.setFrom(new InternetAddress(mailUsername));
msg.addRecipient(Message.RecipientType.TO, new InternetAddress(mailUsername));
msg.setSubject("JavaMail OAuth2 test");
msg.setSentDate(new Date());
msg.setText("Hello, world with OAuth2!\n");
msg.saveChanges();
Transport transport = session.getTransport("smtp");
transport.connect("smtp.gmail.com", username, accessToken);
transport.send(msg, msg.getAllRecipients());
} catch (AddressException e) {
e.printStackTrace();
} catch (NoSuchProviderException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
}
And below is the error that I am getting, I have not mentioned host as localhost or any port number, is the connect method not working ? :
javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;
nested exception is:
java.net.ConnectException: Connection refused (Connection refused)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1282)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:370)
at javax.mail.Service.connect(Service.java:275)
at javax.mail.Service.connect(Service.java:156)
at javax.mail.Service.connect(Service.java:105)
at javax.mail.Transport.send0(Transport.java:168)
at javax.mail.Transport.send(Transport.java:120)
at com.rapidbox.wmscore.service.impl.VendorServiceImpl.main(VendorServiceImpl.java:158)
Caused by: java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:607)
at java.net.Socket.connect(Socket.java:556)
at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:232)
at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1250)
... 7 more
Process finished with exit code 0
Please someone tell me what I am doing wrong. Also if there is ant alternative solution then it would be appreciated.
答案1
得分: 0
似乎您的防火墙或防病毒软件正在阻止您进行连接。
请参阅JavaMail连接调试提示。
英文:
Looks like you have a firewall or antivirus preventing you from connecting.
See the JavaMail connection debugging tips.
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