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spring boot学习第十一篇:发邮件

作者：小蓝xlanll | 2024-02-15 20:15:39

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spring boot学习第十一篇:发邮件

1、pom.xml文件内容如下（是我所有学习内容需要的，不再单独分出来，包不会冲突）：

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  3.          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  4.     <modelVersion>4.0.0</modelVersion>
  5.     <parent>
  6.         <groupId>org.springframework.boot</groupId>
  7.         <artifactId>spring-boot-starter-parent</artifactId>
  8.         <version>2.6.4</version>
  9.         <relativePath/> <!-- lookup parent from repository -->
  10.     </parent>
  11.     <groupId>com.hm-email</groupId>
  12.     <artifactId>hm-email</artifactId>
  13.     <version>0.0.1-SNAPSHOT</version>
  14.     <name>hm-email</name>
  15.     <description>hm-email</description>
  16.     <properties>
  17.         <java.version>8</java.version>
  18.         <druid.version>1.2.8</druid.version>
  19.         <log4jdbc.version>1.16</log4jdbc.version>
  20.         <es.version>7.9.2</es.version>
  21.     </properties>
  22.     <dependencies>
  23.         <!-- druid数据源驱动 -->
  24.         <dependency>
  25.             <groupId>com.alibaba</groupId>
  26.             <artifactId>druid-spring-boot-starter</artifactId>
  27.             <version>${druid.version}</version>
  28.         </dependency>
  29.  
  30.         <dependency>
  31.             <groupId>org.springframework.boot</groupId>
  32.             <artifactId>spring-boot-starter</artifactId>
  33.         </dependency>
  34.  
  35.         <dependency>
  36.             <groupId>org.springframework.boot</groupId>
  37.             <artifactId>spring-boot-starter-test</artifactId>
  38.             <scope>test</scope>
  39.         </dependency>
  40.  
  41.         <!-- mybatis -->
  42.         <dependency>
  43.             <groupId>com.baomidou</groupId>
  44.             <artifactId>mybatis-plus-boot-starter</artifactId>
  45.             <version>3.5.3.1</version>
  46.         </dependency>
  47.  
  48.         <dependency>
  49.             <groupId>org.springframework.boot</groupId>
  50.             <artifactId>spring-boot-starter-web</artifactId>
  51.         </dependency>
  52.  
  53.         <dependency>
  54.             <groupId>org.springframework.boot</groupId>
  55.             <artifactId>spring-boot-starter-test</artifactId>
  56.         </dependency>
  57.  
  58.         <dependency>
  59.             <groupId>org.projectlombok</groupId>
  60.             <artifactId>lombok</artifactId>
  61.             <optional>true</optional>
  62.         </dependency>
  63.  
  64.         <!--Mysql依赖包-->
  65.         <dependency>
  66.             <groupId>mysql</groupId>
  67.             <artifactId>mysql-connector-java</artifactId>
  68.             <scope>runtime</scope>
  69.         </dependency>
  70.  
  71.         <!--lombok插件-->
  72.         <dependency>
  73.             <groupId>org.projectlombok</groupId>
  74.             <artifactId>lombok</artifactId>
  75.             <optional>true</optional>
  76.         </dependency>
  77.  
  78.         <!--监控sql日志-->
  79.         <dependency>
  80.             <groupId>org.bgee.log4jdbc-log4j2</groupId>
  81.             <artifactId>log4jdbc-log4j2-jdbc4.1</artifactId>
  82.             <version>${log4jdbc.version}</version>
  83.         </dependency>
  84.  
  85.         <dependency>
  86.             <groupId>com.alibaba</groupId>
  87.             <artifactId>fastjson</artifactId>
  88.             <version>1.2.9</version>
  89.         </dependency>
  90.  
  91.         <dependency>
  92.             <groupId>redis.clients</groupId>
  93.             <artifactId>jedis</artifactId>
  94.         </dependency>
  95.  
  96.         <dependency>
  97.             <groupId>org.apache.kafka</groupId>
  98.             <artifactId>kafka-clients</artifactId>
  99.  
  100.         </dependency>
  101.  
  102.         <dependency>
  103.             <groupId>org.springframework.kafka</groupId>
  104.             <artifactId>spring-kafka</artifactId>
  105.  
  106.         </dependency>
  107.  
  108.         <!-- high client-->
  109.         <dependency>
  110.             <groupId>org.elasticsearch.client</groupId>
  111.             <artifactId>elasticsearch-rest-high-level-client</artifactId>
  112.             <version>${es.version}</version>
  113.             <exclusions>
  114.                 <exclusion>
  115.                     <groupId>org.elasticsearch</groupId>
  116.                     <artifactId>elasticsearch</artifactId>
  117.                 </exclusion>
  118.                 <exclusion>
  119.                     <groupId>org.elasticsearch.client</groupId>
  120.                     <artifactId>elasticsearch-rest-client</artifactId>
  121.                 </exclusion>
  122.             </exclusions>
  123.         </dependency>
  124.  
  125.         <!-- rest-high-level-client 依赖如下2个jar -->
  126.         <dependency>
  127.             <groupId>org.elasticsearch</groupId>
  128.             <artifactId>elasticsearch</artifactId>
  129.             <version>${es.version}</version>
  130.         </dependency>
  131.         <dependency>
  132.             <groupId>org.elasticsearch.client</groupId>
  133.             <artifactId>elasticsearch-rest-client</artifactId>
  134.             <version>${es.version}</version>
  135.         </dependency>
  136.         <dependency>
  137.             <groupId>junit</groupId>
  138.             <artifactId>junit</artifactId>
  139.         </dependency>
  140.  
  141.         <dependency>
  142.             <groupId>org.springframework.boot</groupId>
  143.             <artifactId>spring-boot-starter-data-mongodb</artifactId>
  144.         </dependency>
  145.  
  146.         <dependency>
  147.             <groupId>org.springframework.boot</groupId>
  148.             <artifactId>spring-boot-starter-security</artifactId>
  149.         </dependency>
  150.  
  151.         <dependency>
  152.             <groupId>org.springframework.security.oauth.boot</groupId>
  153.             <artifactId>spring-security-oauth2-autoconfigure</artifactId>
  154.             <version>2.4.0</version>
  155.         </dependency>
  156.  
  157.         <dependency>
  158.             <groupId>org.springframework.boot</groupId>
  159.             <artifactId>spring-boot-starter-mail</artifactId>
  160.         </dependency>
  161.  
  162.         <dependency>
  163.             <groupId>org.springframework.boot</groupId>
  164.             <artifactId>spring-boot-starter-thymeleaf</artifactId>
  165.         </dependency>
  166.  
  167.     </dependencies>
  168.  
  169.     <build>
  170.         <plugins>
  171.             <plugin>
  172.                 <groupId>org.springframework.boot</groupId>
  173.                 <artifactId>spring-boot-maven-plugin</artifactId>
  174.             </plugin>
  175.         </plugins>
  176.     </build>
  177.  
  178. </project>

2、application.yml内容如下：

  1. server:
  2.   port: 8081
  3.   servlet.context-path: /
  4.  
  5. #配置数据源
  6. spring:
  7.   datasource:
  8.     druid:
  9.       db-type: com.alibaba.druid.pool.DruidDataSource
  10.       driverClassName: net.sf.log4jdbc.sql.jdbcapi.DriverSpy
  11.       url: jdbc:log4jdbc:mysql://${DB_HOST:localhost}:${DB_PORT:3306}/${DB_NAME:eladmin}?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false
  12.       username: ${DB_USER:root}
  13.       password: ${DB_PWD:demo}
  14.   redis:
  15.     host: localhost
  16.     port: 6379
  17.     password: demo
  18.     database: 10
  19.   data:
  20.     mongodb:
  21.       host: 43.138.0.199
  22.       port: 27017
  23.       username: hmblogs
  24.       password: demo
  25.       database: hmblogs
  26.       authentication-database: admin
  27.   mail:
  28.     host: smtp.163.com # smtp地址，开通的时候会显示
  29.     username: southpoet@163.com # 你的邮箱账号
  30.     password: demo # 你的邮箱授权码
  31.     default-encoding: UTF-8
  32.     properties:
  33.       mail:
  34.         smtp:
  35.           socketFactory:
  36.             class: javax.net.ssl.SSLSocketFactory
  37.           auth: false
  38.           starttls:
  39.             enable: false
  40.         debug: true
  41.     protocol: smtp
  42.  
  43. es:
  44.   host: 43.138.0.199
  45.   port: 9200
  46.   scheme: http
  47.   user: elastic
  48.   password: demo

3、BackendApplication内容如下：

  1. package com.hmblogs.backend;
  2.  
  3. import org.springframework.boot.SpringApplication;
  4. import org.springframework.boot.autoconfigure.SpringBootApplication;
  5.  
  6. @SpringBootApplication
  7. public class BackendApplication {
  8.  
  9.     public static void main(String[] args) {
  10.         SpringApplication.run(BackendApplication.class, args);
  11.     }
  12.  
  13. }

4、EmailService文件内容如下：

  1. package com.hmblogs.backend.service;
  2.  
  3. import lombok.extern.slf4j.Slf4j;
  4. import org.springframework.beans.factory.annotation.Autowired;
  5. import org.springframework.beans.factory.annotation.Value;
  6. import org.springframework.mail.SimpleMailMessage;
  7. import org.springframework.mail.javamail.JavaMailSender;
  8. import org.springframework.mail.javamail.MimeMessageHelper;
  9. import org.springframework.stereotype.Service;
  10.  
  11. import javax.mail.MessagingException;
  12. import javax.mail.internet.MimeMessage;
  13. import java.io.File;
  14.  
  15. @Service
  16. @Slf4j
  17. public class EmailService {
  18.  
  19.     @Autowired
  20.     private JavaMailSender mailSender;
  21.  
  22.     @Value("${spring.mail.username}")
  23.     private String username;
  24.  
  25.     /**
  26.      * 使用thymeleaf模板
  27.      * @param to
  28.      * @param subject
  29.      * @param context
  30.      */
  31.     public void sendHtmlMail(String to ,String subject,String context){
  32.         try {
  33.             MimeMessage mimeMessage = mailSender.createMimeMessage();
  34.             MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
  35.             mimeMessageHelper.setFrom(username);
  36.             mimeMessageHelper.setTo(to);
  37.             mimeMessageHelper.setText(context);
  38.             mimeMessageHelper.setSubject(subject);
  39.             mailSender.send(mimeMessage);
  40.         } catch (MessagingException e) {
  41.             e.printStackTrace();
  42.         }
  43.     }
  44.  
  45.     /**
  46.      * 发送文本邮件
  47.      *
  48.      * @param to      收件人地址
  49.      * @param subject 邮件主题
  50.      * @param content 邮件内容
  51.      * @param cc      抄送地址
  52.      */
  53.     public  void sendSimpleMail(String to, String subject, String content, String... cc) {
  54.         SimpleMailMessage message = new SimpleMailMessage();
  55.         message.setFrom(username);
  56.         message.setTo(to);
  57.         message.setSubject(subject);
  58.         message.setText(content);
  59.         if (cc!=null) {
  60.             message.setCc(cc);
  61.         }
  62.         mailSender.send(message);
  63.     }
  64.  
  65.     /**
  66.      * 发送带附件的邮件
  67.      *
  68.      * @param to       收件人地址
  69.      * @param subject  邮件主题
  70.      * @param content  邮件内容
  71.      * @param filePath 附件地址
  72.      * @param cc       抄送地址
  73.      */
  74.     public  void sendAttachmentsMail(String to, String subject, String content, String filePath, String... cc) {
  75.         try {
  76.             MimeMessage message = mailSender.createMimeMessage();
  77.             MimeMessageHelper helper = new MimeMessageHelper(message, true,"UTF-8");
  78.             helper.setFrom(username);
  79.             helper.setTo(to);
  80.             helper.setSubject(subject);
  81.             helper.setText(content, true);
  82.             if (cc!=null) {
  83.                 helper.setCc(cc);
  84.             }
  85.             File file = new File(filePath);
  86.             String fileName = filePath.substring(filePath.lastIndexOf(File.separator));
  87.             helper.addAttachment(fileName, file);
  88.             mailSender.send(message);
  89.         } catch (MessagingException e) {
  90.             log.error("发送邮件失败,收件人:{}", to, e);
  91.         }
  92.     }
  93. }
  94.

5、EmailServiceTest测试类内容如下：

  1. package com.hmblogs.backend.util;
  2.  
  3. import com.hmblogs.backend.BackendApplication;
  4. import com.hmblogs.backend.service.EmailService;
  5. import org.junit.Test;
  6. import org.junit.runner.RunWith;
  7. import org.springframework.beans.factory.annotation.Autowired;
  8. import org.springframework.boot.test.context.SpringBootTest;
  9. import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
  10. import org.thymeleaf.TemplateEngine;
  11. import org.thymeleaf.context.Context;
  12.  
  13. import javax.annotation.Resource;
  14.  
  15. @RunWith(SpringJUnit4ClassRunner.class)
  16. @SpringBootTest(classes={BackendApplication.class, EmailServiceTest.class})
  17. public class EmailServiceTest {
  18.  
  19.     @Resource
  20.     private EmailService emailService;
  21.  
  22.     private static final String to = "southcxy@163.com";
  23.  
  24.     @Test
  25.     public void test(){
  26.         emailService.sendSimpleMail(to,"简单测试22","简单测试");
  27.     }
  28.  
  29.     @Test
  30.     public void testWithAttachment(){
  31.         emailService.sendAttachmentsMail(to,"附件测试22","附件测试","E:\\fileTest.txt");
  32.     }
  33.  
  34.     @Autowired
  35.     TemplateEngine templateEngine;
  36.  
  37.     @Test
  38.     public void sendHtmlMailThymeleaf(){
  39.         Context context = new Context();
  40.         context.setVariable("username","cyc");
  41.         String mail = templateEngine.process("mailtemplate.html",context);
  42.         emailService.sendHtmlMail(to,"恭喜22！",mail);
  43.     }
  44. }
  45.

启动服务，执行该方法，报错如下：

  1. org.springframework.mail.MailSendException: Mail server connection failed; nested exception is javax.mail.MessagingException: Could not convert socket to TLS;
  2.   nested exception is:
  3. 	javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target. Failed messages: javax.mail.MessagingException: Could not convert socket to TLS;
  4.   nested exception is:
  5. 	javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  6. ; message exception details (1) are:
  7. Failed message 1:
  8. javax.mail.MessagingException: Could not convert socket to TLS;
  9.   nested exception is:
  10. 	javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  11. 	at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:2140)
  12. 	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:734)
  13. 	at javax.mail.Service.connect(Service.java:342)
  14. 	at org.springframework.mail.javamail.JavaMailSenderImpl.connectTransport(JavaMailSenderImpl.java:518)
  15. 	at org.springframework.mail.javamail.JavaMailSenderImpl.doSend(JavaMailSenderImpl.java:437)
  16. 	at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:323)
  17. 	at org.springframework.mail.javamail.JavaMailSenderImpl.send(JavaMailSenderImpl.java:312)
  18. 	at com.hmblogs.backend.service.EmailService.sendSimpleMail(EmailService.java:42)
  19. 	at com.hmblogs.backend.util.EmailServiceTest.test(EmailServiceTest.java:21)
  20. 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  21. 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  22. 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  23. 	at java.lang.reflect.Method.invoke(Method.java:498)
  24. 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
  25. 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
  26. 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
  27. 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
  28. 	at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
  29. 	at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
  30. 	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
  31. 	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
  32. 	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
  33. 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
  34. 	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
  35. 	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
  36. 	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
  37. 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
  38. 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
  39. 	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
  40. 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
  41. 	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
  42. 	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
  43. 	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
  44. 	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
  45. 	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
  46. 	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
  47. 	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
  48. 	at com.intellij.rt.junit.IdeaTestRunner$Repeater$1.execute(IdeaTestRunner.java:38)
  49. 	at com.intellij.rt.execution.junit.TestsRepeater.repeat(TestsRepeater.java:11)
  50. 	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:35)
  51. 	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:232)
  52. 	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:55)
  53. Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  54. 	at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
  55. 	at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1949)
  56. 	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:302)
  57. 	at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:296)
  58. 	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1514)
  59. 	at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
  60. 	at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1026)
  61. 	at sun.security.ssl.Handshaker.process_record(Handshaker.java:961)
  62. 	at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1062)
  63. 	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1375)
  64. 	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1403)
  65. 	at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1387)
  66. 	at com.sun.mail.util.SocketFetcher.configureSSLSocket(SocketFetcher.java:602)
  67. 	at com.sun.mail.util.SocketFetcher.startTLS(SocketFetcher.java:529)
  68. 	at com.sun.mail.smtp.SMTPTransport.startTLS(SMTPTransport.java:2135)
  69. 	... 41 more
  70. Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  71. 	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:387)
  72. 	at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
  73. 	at sun.security.validator.Validator.validate(Validator.java:260)
  74. 	at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
  75. 	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:229)
  76. 	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:124)
  77. 	at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1496)
  78. 	... 51 more
  79. Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  80. 	at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
  81. 	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
  82. 	at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
  83. 	at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:382)
  84. 	... 57 more
  85.

查了一圈资料，和SSL证书有关的，都不行，最后试着改改配置文件，发现搞好了

目标邮箱收到了如下邮件：

发件邮箱，发的邮件如下：

但是，问题是，模板html没解析出来，非研发同学肯定看不懂邮件内容，

 怎么处理呢？

比对网上的资料，

问题解决了，邮件截图如下：

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