Framework/Spring Framework

(23.01.04)Spring 프레임워크 : Java Mail Sending (POP을 통한 메일보내기)

프로그래머 오월 2023. 1. 4.

●● Java Mail Sending ●●

Post Office

Post Office Protocol(POP)

POP -> POP3 (요즘은 pop3 버전을 쓴다)

POP3 implemented server : POP3 Server(mail server)

Google POP3 Server is open

All Gmail users allowed

설정사항

-Google 2 step Authorization

-Pc, Smart Phone

-App Secure codes

-application.properties <- input here your App Secure Codes

Google 2 step Authorization , App Secure codes 2단계보안 설정 및 앱 비밀번호 만들기

2단계 인증 신청 절차
    - Google 로그인 > 브라우저 우상단 프로필 이미지 > 계정관리 > 보안 >
      Google에 로그인/2단계 인증 > 앱 비밀번호 설정 > 비밀번호 복사
    - 복사된 비밀번호를 application.properties에 입력

Google POP 설정
    - Gmail로 이동 > 우측 상단 톱니바퀴 > [모든설정 보기] > 전달 및 POP/IMAP >
      POP다운로드 / 모든 메일에 대해 POP 사용하기
    - IMAP 액세스 / IMAP 사용 > 변경사항 저장

-application.properties <- input here your App Secure Codes

- dependency 설정

●● Java에서 이메일 보내기 실습 ●●

EmailController.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
 
@Slf4j
@Controller
@RequestMapping("/mail")
public class EmailController 
{
   @Autowired
   private EmailService svc;
 
   @GetMapping("/test")
   @ResponseBody
   public String sendTestMail()
   {
      boolean isSent = svc.sendSimpleText();
      //boolean isSent = svc.sendAttachMail();
      return isSent ? "메일 보내기 성공":"메일 보내기 실패";
   }
   
   @GetMapping("/auth/{code}")  // 보낸 메일에서 이용자가 인증 링크를 클릭했을 때
   @ResponseBody
   public String index(@PathVariable("code")String code)
   {
      log.info("인증코드 확인={}", code);
      return "인증코드확인=" + code;
   }
}
Colored by Color Scripter

cs

EmailService.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import jakarta.activation.DataHandler;
import jakarta.activation.FileDataSource;
import jakarta.mail.BodyPart;
import jakarta.mail.Message;
import jakarta.mail.MessagingException;
import jakarta.mail.Multipart;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.MimeBodyPart;
import jakarta.mail.internet.MimeMessage;
import jakarta.mail.internet.MimeMultipart;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.stereotype.Service;
 
import lombok.extern.slf4j.Slf4j;
 
@Slf4j
@Service
public class EmailService
{
   @Autowired
   private JavaMailSender sender;
   
   public boolean sendSimpleText()
   {
      List<String> receivers = new ArrayList<>();
      receivers.add("??????@gamil.com");
 
      String[] arrReceiver = (String[])receivers.toArray(new String[receivers.size()]);
      
      SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
      
      simpleMailMessage.setTo(arrReceiver);
      simpleMailMessage.setSubject("Spring Boot Mail Test");
      simpleMailMessage.setText("스프링에서 메일 보내기 테스트");
      //SimpleMailMessage를 사용하여 html 을 전달하더라도 수신자의 화면에는 html이 해석되지 않음
      simpleMailMessage.setText("<a href='/mail/auth/"+ createRandomStr()+"'>인증</a>");
      
      sender.send(simpleMailMessage);
 
      return true;
   }
   
   private String createRandomStr()
   {
      UUID randomUUID = UUID.randomUUID();
      return randomUUID.toString().replaceAll("-", "");
   }
   
   public boolean sendMimeMessage()
   {
      MimeMessage mimeMessage = sender.createMimeMessage();
 
      try {
         InternetAddress[] addressTo = new InternetAddress[1];
         addressTo[0] = new InternetAddress("??????@gamil.com");
 
         mimeMessage.setRecipients(Message.RecipientType.TO, addressTo);
 
         mimeMessage.setSubject("마임 메시지(Text) 테스트");
         
         mimeMessage.setContent("This is mimemessage", "text/plain;charset=utf-8");
         
         sender.send(mimeMessage);
         return true;
      } catch (MessagingException e) {
         log.error("에러={}", e);
      }
 
      return false;
   }
   
   public boolean sendHTMLMessage()
   {
      MimeMessage mimeMessage = sender.createMimeMessage();
 
      try {
         InternetAddress[] addressTo = new InternetAddress[1];
         addressTo[0] = new InternetAddress("??????@gamil.com");
 
         mimeMessage.setRecipients(Message.RecipientType.TO, addressTo);
 
         mimeMessage.setSubject("마임 메시지(HTML) 테스트");
         
         mimeMessage.setContent("<a href='http://localhost/mail/auth/abc123'>메일주소 인증</a>", "text/html;charset=utf-8");
         
         sender.send(mimeMessage);
         return true;
      } catch (MessagingException e) {
         log.error("에러={}", e);
      }
 
      return false;
   }
   
   public boolean sendAttachMail()
   {
      MimeMessage mimeMessage = sender.createMimeMessage();
      
      Multipart multipart = new MimeMultipart();
 
      try {
         InternetAddress[] addressTo = new InternetAddress[1];
         addressTo[0] = new InternetAddress("??????@gamil.com");
 
         mimeMessage.setRecipients(Message.RecipientType.TO, addressTo);
 
         mimeMessage.setSubject("마임 메시지(첨부파일) 테스트");
         
         // Fill the message
         BodyPart messageBodyPart = new MimeBodyPart();
 
         messageBodyPart.setContent("<a href='http://localhost/mail/auth/abc123'>메일주소 인증</a>", "text/html;charset=utf-8");
         
         multipart.addBodyPart(messageBodyPart);
          
         // Part two is attachment
         messageBodyPart = new MimeBodyPart();
         File file = new File("C:/test/첨부.txt");
         FileDataSource fds = new FileDataSource(file);
         messageBodyPart.setDataHandler(new DataHandler(fds));
         
         String fileName = fds.getName();
         messageBodyPart.setFileName(fileName);
         
         multipart.addBodyPart(messageBodyPart);
          
         // Put parts in message
         mimeMessage.setContent(multipart);
         
         sender.send(mimeMessage);
         
         return true;
      }catch(Exception ex) {
         log.error("에러={}", ex);
      }
      return false;
   }
}
Colored by Color Scripter

cs

실행결과 :

●●Java Mail Sending을 이용하여 이메일 인증 시스템 만들기●●

EmailController.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.ezen.spring.web.service.EmailService;
import jakarta.servlet.http.HttpSession;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
 
@Slf4j
@Controller
@RequestMapping("/mail")
public class EmailController {
 
    
    @Autowired
    private EmailService svc;
 
    @GetMapping("/test")
    @ResponseBody
    public String sendTestMail() {
        boolean isSent = svc.sendSimpleText();
        // boolean isSent = svc.sendAttachMail();
        return isSent ? "메일 보내기 성공" : "메일 보내기 실패";
    }
    /*
    @GetMapping("/auth/{code}") // 보낸 메일에서 이용자가 인증 링크를 클릭했을 때
    @ResponseBody
    public String index(@PathVariable("code") String code) {
        boolean result = svc.checkMessage(code);
        log.info("인증코드 확인={}", code);
        return "인증코드확인=" + code;
    }*/
    @GetMapping("/auth") // 보낸 메일에서 이용자가 인증 링크를 클릭했을 때
    @ResponseBody
    public String index(HttpSession session) {
        Map<String,Object> mailresult = svc.checkMessage(session);
        mailresult.get("code");
        log.info("인증코드보냄"+mailresult.get("code"));
        return "인증코드보냄";
    }
    @GetMapping("/auth/{code}") // 보낸 메일에서 이용자가 인증 링크를 클릭했을 때
    @ResponseBody
    public String index(@PathVariable("code") String code,HttpSession session) {
        
        boolean result = svc.checkMessageResult(code,session);
        
        log.info("인증 확인={}", result);
        return "인증확인=" + result;
    }
}
Colored by Color Scripter

cs

EmailService.java

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197

import java.io.File;
import java.util.*;
import java.util.UUID;
import jakarta.activation.DataHandler;
import jakarta.activation.FileDataSource;
import jakarta.mail.BodyPart;
import jakarta.mail.Message;
import jakarta.mail.MessagingException;
import jakarta.mail.Multipart;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.MimeBodyPart;
import jakarta.mail.internet.MimeMessage;
import jakarta.mail.internet.MimeMultipart;
import jakarta.security.auth.message.callback.PrivateKeyCallback.Request;
import jakarta.servlet.http.HttpSession;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.stereotype.Service;
 
import lombok.extern.slf4j.Slf4j;
 
@Slf4j
@Service
public class EmailService
{
   @Autowired
   private JavaMailSender sender;
   
   private HttpSession session;
   
   public void setSession(HttpSession session) {
        this.session = session;
    }
    
   
   public boolean sendSimpleText()
   {
      List<String> receivers = new ArrayList<>();
      //메일 보낼 수신자를 db에서 써내서 리스트에 담아서 반복문을 돌린다.
      receivers.add("???????@gmail.com");
 
      String[] arrReceiver = (String[])receivers.toArray(new String[receivers.size()]);
                                                          //배열의 저장공간 확보(메모리 크기지정)
      
      SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
      //심플의 뜻은 일반 텍스트만 보내겠다는 뜻
      //메세지 종류:심플메일메세지 , 마임메세지
      
      simpleMailMessage.setTo(arrReceiver);
      simpleMailMessage.setSubject("Spring Boot Mail Test");
      simpleMailMessage.setText("스프링에서 메일 보내기 테스트");
      //SimpleMailMessage를 사용하여 html 을 전달하더라도 수신자의 화면에는 html이 해석되지 않음
      simpleMailMessage.setText("<a href='/mail/auth/"+ createRandomStr()+"'>인증</a>");
                                                          //유일한 인증문자열을 생성하는 자바 메소드
      
      sender.send(simpleMailMessage);
 
      return true;
   }
   
   private String createRandomStr()
   {
      UUID randomUUID = UUID.randomUUID();
      return randomUUID.toString().replaceAll("-", "");
                                      //"-"를 없앰
   }
   
   public boolean sendMimeMessage()
   {
      MimeMessage mimeMessage = sender.createMimeMessage();
 
      try {
         InternetAddress[] addressTo = new InternetAddress[1];
         addressTo[0] = new InternetAddress("???????@gmail.com");
 
         mimeMessage.setRecipients(Message.RecipientType.TO, addressTo);
 
         mimeMessage.setSubject("마임 메시지(Text) 테스트");
         
         mimeMessage.setContent("This is mimemessage", "text/plain;charset=utf-8");
                                                     //text/html or text/plain
         
         sender.send(mimeMessage);
         return true;
      } catch (MessagingException e) {
         log.error("에러={}", e);
      }
 
      return false;
   }
   
   public boolean sendHTMLMessage()
   {
      MimeMessage mimeMessage = sender.createMimeMessage();
 
      try {
         InternetAddress[] addressTo = new InternetAddress[1];
         addressTo[0] = new InternetAddress("???????@gmail.com");
 
         mimeMessage.setRecipients(Message.RecipientType.TO, addressTo);
 
         mimeMessage.setSubject("마임 메시지(HTML) 테스트");
         
         mimeMessage.setContent("<a href='http://localhost/mail/auth/abc123'>메일주소 인증</a>", "text/html;charset=utf-8");
         
         sender.send(mimeMessage);
         return true;
      } catch (MessagingException e) {
         log.error("에러={}", e);
      }
 
      return false;
   }
   
   public boolean sendAttachMail()
   {
      MimeMessage mimeMessage = sender.createMimeMessage();
      
      Multipart multipart = new MimeMultipart();
 
      try {
         InternetAddress[] addressTo = new InternetAddress[1];
         addressTo[0] = new InternetAddress("parkjh080@gmail.com");
 
         mimeMessage.setRecipients(Message.RecipientType.TO, addressTo);
 
         mimeMessage.setSubject("마임 메시지(첨부파일) 테스트");
         
         // Fill the message 바디 파트를 만들어야한다.
         BodyPart messageBodyPart = new MimeBodyPart();
 
         messageBodyPart.setContent("<a href='http://localhost/mail/auth/abc123'>메일주소 인증</a>", "text/html;charset=utf-8");
         
         multipart.addBodyPart(messageBodyPart);
          
         // Part two is attachment
         messageBodyPart = new MimeBodyPart();
         File file = new File("C:/test/첨부.txt");
         FileDataSource fds = new FileDataSource(file);
         messageBodyPart.setDataHandler(new DataHandler(fds));
         
         String fileName = fds.getName();
         messageBodyPart.setFileName(fileName);
         
         multipart.addBodyPart(messageBodyPart);
          
         // Put parts in message
         mimeMessage.setContent(multipart);
         
         sender.send(mimeMessage);
         
         return true;
      }catch(Exception ex) {
         log.error("에러={}", ex);
      }
      return false;
   }
   public Map<String,Object> checkMessage(HttpSession session)
   {
      MimeMessage mimeMessage = sender.createMimeMessage();
 
      try {
         InternetAddress[] addressTo = new InternetAddress[1];
         addressTo[0] = new InternetAddress("???????@gmail.com");
 
         mimeMessage.setRecipients(Message.RecipientType.TO, addressTo);
 
         mimeMessage.setSubject("마임 메시지(HTML) 테스트");
         String str = createRandomStr();//유일한 인증문자열을 생성하는 자바 메소드
         
         mimeMessage.setContent("<a href='http://localhost/mail/auth/"+str+"'>메일주소 인증</a>", "text/html;charset=utf-8");
         
         sender.send(mimeMessage);
         session.setAttribute("code", str);
         Map<String,Object> map = new HashMap<>();
         map.put("result", true);
         map.put("code",str);
         return map;
      } catch (MessagingException e) {
         log.error("에러={}", e);
      }
 
      return null;
   }
   public boolean checkMessageResult(String code,HttpSession session)
   {
       log.info("코드"+session.getAttribute("code"));
       if(session.getAttribute("code").equals(code)) {
           
           return true;
       }
       return false;
   }
}
 
Colored by Color Scripter

cs

160 ~ 195 까지 메소드 활용

실행결과 :

이클립스 콘솔창:

'Framework > Spring Framework' 카테고리의 다른 글

(23.01.06)Spring 프레임워크 : thymeleaf를 이용한 보안 로그인 - 로그인 에러 (0)	2023.01.09
(23.01.05)Spring 프레임워크: 로그인 보안 (SimpleSecurity) (0)	2023.01.09
(23.01.02)Spring 프레임워크: 웹소켓을 이용한 채팅프로그램 만들기 (0)	2023.01.02
(22.12.30)Spring 프레임워크:WebSocket을 사용한 채팅 프로그램 만들기 (1)	2022.12.30
(22.12.29)Spring 프레임워크: Thymeleaf, JPA, Spring 프레임워크에 dependency하여 활용 및 CRUD (0)	2022.12.29

(23.01.04)Spring 프레임워크 : Java Mail Sending (POP을 통한 메일보내기)

●● Java Mail Sending ●●

●● Java에서 이메일 보내기 실습 ●●

●●Java Mail Sending을 이용하여 이메일 인증 시스템 만들기●●

'Framework > Spring Framework' 카테고리의 다른 글

댓글

티스토리툴바