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SpringBoot之javaMail发送，支持Freemark模板
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‎chapter11/.gitignore

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/target/
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!.mvn/wrapper/maven-wrapper.jar
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### STS ###
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.apt_generated
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.classpath
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.factorypath
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.project
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.settings
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.springBeans
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.sts4-cache
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### IntelliJ IDEA ###
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.idea
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*.iws
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*.iml
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*.ipr
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### NetBeans ###
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/nbproject/private/
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/build/
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/nbbuild/
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/dist/
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/nbdist/
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/.nb-gradle/

‎chapter11/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.yukong</groupId>
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<artifactId>mail</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<packaging>jar</packaging>
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<name>mail</name>
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<description>springboot for send mail</description>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>2.1.1.RELEASE</version>
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<relativePath/> <!-- lookup parent from repository -->
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<java.version>1.8</java.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-mail</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-freemarker</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-maven-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>

‎chapter11/src/main/java/com/yukong/mail/MailApplication.java

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package com.yukong.mail;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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public class MailApplication {
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public static void main(String[] args) {
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SpringApplication.run(MailApplication.class, args);
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}
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}

‎chapter11/src/main/java/com/yukong/mail/MailSendService.java

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package com.yukong.mail;
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import com.yukong.mail.entity.Mail;
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import freemarker.template.Template;
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import freemarker.template.TemplateException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.InitializingBean;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.mail.javamail.JavaMailSender;
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import org.springframework.mail.javamail.MimeMessageHelper;
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import org.springframework.stereotype.Service;
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import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
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import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
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import javax.mail.internet.InternetAddress;
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import javax.mail.internet.MimeMessage;
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import javax.mail.internet.MimeUtility;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @author: yukong
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* @date: 2018/12/5 16:56
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*/
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@Service
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public class MailSendService {
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private Logger logger = LoggerFactory.getLogger(getClass());
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@Autowired
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private JavaMailSender javaMailSender;
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@Autowired
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private FreeMarkerConfigurer freeMarkerConfigurer;
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@Value("${spring.mail.username}")
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private String USERNAME = "yukong";
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/**
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* 根据模板名 获取邮件内容
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* @param templateName
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* @param params
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* @return
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*/
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private String getMailTextByTemplateName(String templateName, Map<String,Object> params) throws IOException, TemplateException {
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String mailText = "";
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//通过指定模板名获取FreeMarker模板实例
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Template template = freeMarkerConfigurer.getConfiguration().getTemplate(templateName);
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//FreeMarker通过Map传递动态数据
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//注意动态数据的key和模板标签中指定的属性相匹配
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//解析模板并替换动态数据，最终code将替换模板文件中的${code}标签。
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mailText = FreeMarkerTemplateUtils.processTemplateIntoString(template, params);
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return mailText;
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}
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public boolean sendWithHTMLTemplate(Mail mail) {
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try {
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//发件人的昵称
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String nick = MimeUtility.encodeText(USERNAME);
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//发件人是谁
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InternetAddress from = new InternetAddress(nick + "<541130126@qq.com>");
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MimeMessage mimeMessage = javaMailSender.createMimeMessage();
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MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage,true);
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mimeMessageHelper.setTo(mail.getEmail());
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mimeMessageHelper.setFrom(from);
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mimeMessageHelper.setSubject(mail.getSubject());
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HashMap<String, Object> params = new HashMap<>();
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// 使用模板生成html邮件内容
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String result =getMailTextByTemplateName(mail.getTemplate(), mail.getParams());
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mimeMessageHelper.setText(result, true);
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javaMailSender.send(mimeMessage);
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return true;
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} catch (Exception e) {
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logger.error("发送邮件失败" + e.getMessage());
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return false;
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}
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}
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}

‎chapter11/src/main/java/com/yukong/mail/MailTemplateNameEnum.java

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package com.yukong.mail;
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/**
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* @author: yukong
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* @date: 2018/12/5 17:23
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*/
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public enum MailTemplateNameEnum {
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LOGIN_CODE("login_code.ftl", "登录验证码模板");
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String code;
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String desc;
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private MailTemplateNameEnum(String code, String desc) {
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this.code = code;
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this.desc = desc;
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}
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public String getCode() {
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return code;
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}
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public String getDesc() {
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return desc;
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}
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}

‎chapter11/src/main/java/com/yukong/mail/entity/Mail.java

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package com.yukong.mail.entity;
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import java.io.Serializable;
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import java.util.Map;
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/**
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* @author: yukong
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* @date: 2018/12/5 17:25
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*/
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public class Mail implements Serializable {
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private static final long serialVersionUID = 1L;
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//接收方邮件
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private String email;
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//主题
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private String subject;
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//模板
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private String template;
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// 自定义参数
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private Map<String, Object> params;
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public static long getSerialVersionUID() {
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return serialVersionUID;
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}
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public String getEmail() {
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return email;
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}
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public void setEmail(String email) {
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this.email = email;
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}
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public String getSubject() {
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return subject;
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}
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public void setSubject(String subject) {
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this.subject = subject;
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}
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public String getTemplate() {
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return template;
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}
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public void setTemplate(String template) {
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this.template = template;
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}
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public Map<String, Object> getParams() {
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return params;
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}
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public void setParams(Map<String, Object> params) {
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this.params = params;
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}
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}

‎chapter11/src/main/resources/application.yml

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spring:
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mail:
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host: smtp.qq.com
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username: 541130126@qq.com
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password: xxx
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properties:
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mail:
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smtp:
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auth: true
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starttls:
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enable: true
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required: true
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freemarker:
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charset: UTF-8
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allow-request-override: false
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cache: false
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expose-request-attributes: false
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expose-session-attributes: false
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content-type: text/html
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template-loader-path: classpath:/static/template/
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expose-spring-macro-helpers: false
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check-template-location: true
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enabled: true

‎chapter11/src/main/resources/static/template/login_code.ftl

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你好，你本次的登录验证码为${code}若非本人操作，请忽略本邮件。

‎chapter11/src/test/java/com/yukong/mail/MailApplicationTests.java

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package com.yukong.mail;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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@RunWith(SpringRunner.class)
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@SpringBootTest
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public class MailApplicationTests {
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@Test
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public void contextLoads() {
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}
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}

‎chapter11/src/test/java/com/yukong/mail/MailSendServiceTest.java

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package com.yukong.mail;
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import com.yukong.mail.entity.Mail;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
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import java.util.HashMap;
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import java.util.Map;
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import static org.junit.Assert.*;
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/**
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* @author: yukong
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* @date: 2018/12/5 17:17
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*/
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@RunWith(SpringJUnit4ClassRunner.class)
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@SpringBootTest
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public class MailSendServiceTest {
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@Autowired
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private MailSendService mailSendService;
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@Test
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public void sendWithHTMLTemplate() {
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Map<String, Object> params = new HashMap<>();
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// 参数
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Integer code = (int)(Math.random()*9+1)*100000;
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params.put("code", code);
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Mail mail = new Mail();
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mail.setEmail("yukonga@vip.qq.com");
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mail.setParams(params);
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mail.setTemplate(MailTemplateNameEnum.LOGIN_CODE.getCode());
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mail.setSubject("登录验证码");
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mailSendService.sendWithHTMLTemplate(mail);
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}
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}

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