1、预警服务引入邮箱功能

2、新增邮箱发送工具类

xjs-business/xjs-business-warning/pom.xml

@@ -28,6 +28,17 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-websocket</artifactId>
         </dependency>
+
+        <!--邮箱发送-->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-mail</artifactId>
+        </dependency>
+        <!--邮箱发送静态模板-->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
     </dependencies>
 
 </project>

xjs-business/xjs-business-warning/src/main/java/com/xjs/domain/mall/MailBean.java

@@ -0,0 +1,36 @@
+package com.xjs.domain.mall;
+
+import lombok.Data;
+
+import java.io.Serializable;
+
+/**
+ * 邮箱发送实体
+ *
+ * @author xiejs
+ * @since 2022-04-13
+ */
+@Data
+public class MailBean implements Serializable {
+
+    private static final long serialVersionUID = -2116367492649751914L;
+
+    /**
+     * 邮件接收人
+     */
+    private String recipient;
+    /**
+     * 邮件主题
+     */
+    private String subject;
+    /**
+     * 邮件内容
+     */
+    private String content;
+
+    /**
+     * 附件地址
+     */
+    private String absolutePath;
+
+}

xjs-business/xjs-business-warning/src/main/java/com/xjs/server/MailServer.java

@@ -0,0 +1,167 @@
+package com.xjs.server;
+
+import com.xjs.domain.mall.MailBean;
+import lombok.extern.log4j.Log4j2;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.io.FileSystemResource;
+import org.springframework.mail.SimpleMailMessage;
+import org.springframework.mail.javamail.JavaMailSender;
+import org.springframework.mail.javamail.MimeMessageHelper;
+import org.springframework.stereotype.Component;
+import org.thymeleaf.TemplateEngine;
+import org.thymeleaf.context.Context;
+
+import javax.annotation.Resource;
+import javax.mail.internet.MimeMessage;
+import java.io.File;
+
+/**
+ * 邮箱发送工具
+ *
+ * @author xiejs
+ * @since 2022-04-13
+ */
+@Component
+@Log4j2
+public class MailServer {
+
+    @Value("${spring.mail.username}")
+    //邮件发送者
+    private String MAIL_SENDER;
+
+    @Resource
+    private JavaMailSender javaMailSender;
+
+    @Autowired
+    private TemplateEngine templateEngine;
+
+
+    // todo 优化 邮箱发送失败重试机制、防止邮件被识别为垃圾邮件，固定时间内发送邮件的限制等。
+
+
+    /**
+     * 发送文本邮件
+     *
+     * @param mailBean 邮箱实体
+     */
+    public void sendSimpleMail(MailBean mailBean) {
+        try {
+            SimpleMailMessage mailMessage = new SimpleMailMessage();
+            mailMessage.setFrom(MAIL_SENDER);
+            mailMessage.setTo(mailBean.getRecipient());
+            mailMessage.setSubject(mailBean.getSubject());
+            mailMessage.setText(mailBean.getContent());
+
+            javaMailSender.send(mailMessage);
+        } catch (Exception e) {
+            log.error("文本邮件发送失败:{}", e.getMessage());
+        }
+    }
+
+    /**
+     * 发送HTML格式邮件
+     *
+     * @param mailBean 邮箱实体
+     */
+    public void sendHTMLMail(MailBean mailBean) {
+        MimeMessage mimeMailMessage = null;
+        try {
+            mimeMailMessage = javaMailSender.createMimeMessage();
+            //true 表示需要创建一个multipart message
+            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMailMessage, true);
+            mimeMessageHelper.setFrom(MAIL_SENDER);
+            mimeMessageHelper.setTo(mailBean.getRecipient());
+            mimeMessageHelper.setSubject(mailBean.getSubject());
+            //邮件抄送
+            //mimeMessageHelper.addCc("抄送人");
+            mimeMessageHelper.setText(mailBean.getContent(), true);
+            javaMailSender.send(mimeMailMessage);
+        } catch (Exception e) {
+            log.error("HTML格式邮件发送失败:{}", e.getMessage());
+        }
+    }
+
+
+    /**
+     * 附件格式邮件发送
+     *
+     * @param mailBean 邮箱实体
+     */
+    public void sendAttachmentMail(MailBean mailBean) {
+        MimeMessage mimeMailMessage = null;
+        try {
+            mimeMailMessage = javaMailSender.createMimeMessage();
+            //true 表示需要创建一个multipart message
+            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMailMessage, true);
+            mimeMessageHelper.setFrom(MAIL_SENDER);
+            mimeMessageHelper.setTo(mailBean.getRecipient());
+            mimeMessageHelper.setSubject(mailBean.getSubject());
+            mimeMessageHelper.setText(mailBean.getContent());
+            //文件路径 目前写死在代码中，之后可以当参数传过来，或者在MailBean中添加属性absolutePath
+            FileSystemResource file = new FileSystemResource(new File(mailBean.getAbsolutePath()));
+            //FileSystemResource file = new FileSystemResource(new File("src/main/resources/static/image/email.png"));
+            String fileName = mailBean.getAbsolutePath().substring(mailBean.getAbsolutePath().lastIndexOf(File.separator));
+            //添加附件,第一个参数表示添加到 Email 中附件的名称，第二个参数是图片资源
+            mimeMessageHelper.addAttachment(fileName, file);
+            //多个附件
+            //mimeMessageHelper.addAttachment(fileName1, file1);
+
+            javaMailSender.send(mimeMailMessage);
+        } catch (Exception e) {
+            log.error("附件格式邮件发送失败:{}", e.getMessage());
+        }
+    }
+
+
+    /**
+     * 静态资源格式邮件发送
+     *
+     * @param mailBean 邮箱实体
+     */
+    public void sendInlineMail(MailBean mailBean) {
+        MimeMessage mimeMailMessage = null;
+        try {
+            mimeMailMessage = javaMailSender.createMimeMessage();
+            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMailMessage, true);
+            mimeMessageHelper.setFrom(MAIL_SENDER);
+            mimeMessageHelper.setTo(mailBean.getRecipient());
+            mimeMessageHelper.setSubject(mailBean.getSubject());
+            mimeMessageHelper.setText(mailBean.getContent(), true);
+            //文件路径
+            FileSystemResource file = new FileSystemResource(new File(mailBean.getAbsolutePath()));
+            //FileSystemResource file = new FileSystemResource(new File("src/main/resources/static/image/email.png"))
+            //添加多个图片可以使用多条 <img src='cid:" + rscId + "' > 和 mimeMessageHelper.addInline(rscId, res) 来实现
+            mimeMessageHelper.addInline("picture", file);
+
+            javaMailSender.send(mimeMailMessage);
+        } catch (Exception e) {
+            log.error("静态资源格式邮件发送失败:{}", e.getMessage());
+        }
+    }
+
+    /**
+     * 发送Thymeleaf模版邮件
+     *
+     * @param recipient 接受者邮箱
+     * @param name      用户名称
+     * @param title     主体
+     */
+    public void sendTempLateMail(String recipient, String name, String title) {
+        //注意：Context 类是在org.thymeleaf.context.Context包下的。
+        Context context = new Context();
+        //html中填充动态属性值
+        context.setVariable("username", name);
+        context.setVariable("url", "#");
+        //注意：process第一个参数名称要和templates下的模板名称一致。要不然会报错
+        //org.thymeleaf.exceptions.TemplateInputException: Error resolving template [email]
+        String emailContent = templateEngine.process("email", context);
+        MailBean mailBean = new MailBean();
+        mailBean.setRecipient(recipient);
+        mailBean.setSubject(title);
+        mailBean.setContent(emailContent);
+        this.sendHTMLMail(mailBean);
+    }
+
+
+}

xjs-business/xjs-business-warning/src/main/resources/templates/email.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en" xmlns:th="http://www.thymeleaf.org">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+</head>
+<body>
+<h3 th:text="|尊敬的${username} :|"></h3><br />
+<img th:src="@{images/i.png}" /> 您有代金券即将到期，逾期失效，请尽早使用。<a th:href = "${url}" >点此查看</a>
+<br />
+</body>
+</html>

xjs-business/xjs-business-warning/src/test/java/com/xjs/server/MailServerTest.java

@@ -0,0 +1,41 @@
+package com.xjs.server;
+
+import com.xjs.XjsWarningApp;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/**
+ * @author xiejs
+ * @since 2022-04-13
+ */
+@SpringBootTest(classes = XjsWarningApp.class)
+class MailServerTest {
+
+    @Autowired
+    private MailServer mailServer;
+
+
+    @Test
+    void sendSimpleMail() {
+    }
+
+    @Test
+    void sendHTMLMail() {
+    }
+
+    @Test
+    void sendAttachmentMail() {
+    }
+
+    @Test
+    void sendInlineMail() {
+    }
+
+    @Test
+    void sendTempLateMail() {
+        mailServer.sendTempLateMail("1294405880@qq.com","生哥","这是标题");
+    }
+}