
- Spring Boot Tutorial
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- Spring Beans & Dependency Injection
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- Spring Boot - Application Properties
- Spring Boot - Logging
- Building RESTful Web Services
- Spring Boot - Exception Handling
- Spring Boot - Interceptor
- Spring Boot - Servlet Filter
- Spring Boot - Tomcat Port Number
- Spring Boot - Rest Template
- Spring Boot - File Handling
- Spring Boot - Service Components
- Spring Boot - Thymeleaf
- Consuming RESTful Web Services
- Spring Boot - CORS Support
- Spring Boot - Internationalization
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- Spring Boot - Enabling HTTPS
- Spring Boot - Eureka Server
- Service Registration with Eureka
- Zuul Proxy Server and Routing
- Spring Cloud Configuration Server
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- Spring Boot - Enabling Swagger2
- Spring Boot - Creating Docker Image
- Tracing Micro Service Logs
- Spring Boot - Flyway Database
- Spring Boot - Sending Email
- Spring Boot - Hystrix
- Spring Boot - Web Socket
- Spring Boot - Batch Service
- Spring Boot - Apache Kafka
- Spring Boot - Twilio
- Spring Boot - Unit Test Cases
- Rest Controller Unit Test
- Spring Boot - Database Handling
- Securing Web Applications
- Spring Boot - OAuth2 with JWT
- Spring Boot - Google Cloud Platform
- Spring Boot - Google OAuth2 Sign-In
- Spring Boot Resources
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Spring Boot - Sending Email
By using Spring Boot RESTful web service, you can send an email with Gmail Transport Layer Security. In this chapter, let us understand in detail how to use this feature.
First, we need to add the Spring Boot Starter Mail dependency in your build configuration file.
Maven users can add the following dependency into the pom.xml file.
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency>
Gradle users can add the following dependency in your build.gradle file.
compile('org.springframework.boot:spring-boot-starter-mail')
The code of main Spring Boot application class file is given below −
package com.tutorialspoint.emailapp; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class EmailappApplication { public static void main(String[] args) { SpringApplication.run(EmailappApplication.class, args); } }
You can write a simple Rest API to send to email in Rest Controller class file as shown.
package com.tutorialspoint.emailapp; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class EmailController { @RequestMapping(value = "/sendemail") public String sendEmail() { return "Email sent successfully"; } }
You can write a method to send the email with Attachment. Define the mail.smtp properties and used PasswordAuthentication.
private void sendmail() throws AddressException, MessagingException, IOException { Properties props = new Properties(); props.put("mail.smtp.auth", "true"); props.put("mail.smtp.starttls.enable", "true"); props.put("mail.smtp.host", "smtp.gmail.com"); props.put("mail.smtp.port", "587"); Session session = Session.getInstance(props, new javax.mail.Authenticator() { protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication("tutorialspoint@gmail.com", "<your password>"); } }); Message msg = new MimeMessage(session); msg.setFrom(new InternetAddress("tutorialspoint@gmail.com", false)); msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse("tutorialspoint@gmail.com")); msg.setSubject("Tutorials point email"); msg.setContent("Tutorials point email", "text/html"); msg.setSentDate(new Date()); MimeBodyPart messageBodyPart = new MimeBodyPart(); messageBodyPart.setContent("Tutorials point email", "text/html"); Multipart multipart = new MimeMultipart(); multipart.addBodyPart(messageBodyPart); MimeBodyPart attachPart = new MimeBodyPart(); attachPart.attachFile("/var/tmp/image19.png"); multipart.addBodyPart(attachPart); msg.setContent(multipart); Transport.send(msg); }
Now, call the above sendmail() method from the Rest API as shown −
@RequestMapping(value = "/sendemail") public String sendEmail() throws AddressException, MessagingException, IOException { sendmail(); return "Email sent successfully"; }
Note − Please switch ON allow less secure apps in your Gmail account settings before sending an email.
The complete build configuration file is given below.
Maven – pom.xml
<?xml version = "1.0" encoding = "UTF-8"?> <project xmlns = "http://maven.apache.org/POM/4.0.0" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.tutorialspoint</groupId> <artifactId>emailapp</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>emailapp</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
Gradle – build.gradle
buildscript { ext { springBootVersion = '1.5.9.RELEASE' } repositories { mavenCentral() } dependencies { classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}") } } apply plugin: 'java' apply plugin: 'eclipse' apply plugin: 'org.springframework.boot' group = 'com.tutorialspoint' version = '0.0.1-SNAPSHOT' sourceCompatibility = 1.8 repositories { mavenCentral() } dependencies { compile('org.springframework.boot:spring-boot-starter-web') compile('org.springframework.boot:spring-boot-starter-mail') testCompile('org.springframework.boot:spring-boot-starter-test') }
Now, you can create an executable JAR file, and run the Spring Boot application by using the Maven or Gradle commands shown below −
For Maven, you can use the command as shown −
mvn clean install
After “BUILD SUCCESS”, you can find the JAR file under the target directory.
For Gradle, you can use the command as shown −
gradle clean build
After “BUILD SUCCESSFUL”, you can find the JAR file under the build/libs directory.
Now, run the JAR file by using the command given below −
java –jar <JARFILE>
You can see that the application has started on the Tomcat port 8080.

Now hit the following URL from your web browser and you will receive an email.
http://localhost:8080/sendemail

