关于spring:使用SpringBoot发送Gmail和QQ邮箱

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如何应用 SpringBoot 发送 Gmail、QQ 邮箱，发送文本、附件和模板。

DemoApplication.java

`package com.example.sendmail.demo;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
@SpringBootApplication
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
    @Controller
    class MainController{
        @Value(“${spring.mail.username}”)
        private String username;
        /**
         * 发送邮件页面
         * @return
         */
        @GetMapping(value = {“/”,”/send/form”})
        public String form(Model model){
            model.addAttribute(“from”,username);
            return “send-form”;
        }
    }
}
`

MailController.java

`package com.example.sendmail.demo;
import lombok.RequiredArgsConstructor;
import lombok.extern.log4j.Log4j2;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import javax.mail.MessagingException;
@Log4j2
@RestController
@RequiredArgsConstructor
@RequestMapping(“/send”)
public class MailController {
    private final MailService mailService;
    /**
     * 发送文本
     * @param mailBody
     * @return
     */
    @PostMapping(“/text”)
    public Boolean text(@RequestBody MailBody mailBody){
        return mailService.sendText(mailBody);
    }
    /**
     * 发送附件
     * @param mailBody
     * @param file
     * @return
     * @throws MessagingException
     */
    @PostMapping(“/attach”)
    public Boolean attach(@RequestParam(“mailBody”) MailBody mailBody,@RequestParam(“file”) MultipartFile file) throws MessagingException {
        mailBody.setFile(file);
        log.info(“file name:{}”,file.getOriginalFilename());
        log.info(“mailBody:{},”,mailBody.toString());
        return mailService.sendAttachment(mailBody);
    }
    /**
     * 发送模板
     * @param mailBody
     * @return
     * @throws MessagingException
     */
    @PostMapping(“/template”)
    public boolean template(@RequestBody MailBody mailBody) throws MessagingException {
        return mailService.sendTemplate(mailBody);
    }
}
`