用springboot做一个雨雪天气给自己发邮件的项目

﹏ヽ暗。殇╰゛Y 2023-09-24 20:13 102阅读 0赞

# 项目目标 #

每天早上7点跑定时任务，调用天气预报api，如果当天是雨雪天气，就发邮件提醒

# 需要资源 #

一台阿里云轻量服务器

![format_png][]

注册聚合数据账号，也可以用和风天气api [www.juhe.cn/][www.juhe.cn] 发邮件的邮箱账号，我用的是网易邮箱。 进入设置，开启IAMP和POP3服务，复制授权码，待会儿有用

# 代码实现 #

调用api查询天气

public Weather queryWeather(String cityName) {
        Map<String, Object> params = new HashMap<>();//组合参数
        params.put("city", cityName);
        params.put("key", weatherConfig.getApiKey());
        String queryParams = urlencode(params);
    
        String responseJsonStr = doGet(weatherConfig.getApiUrl(), queryParams);
        try {
            JSONObject response = new JSONObject(responseJsonStr);
            int error_code = response.getInt("error_code");
            if (error_code == 0) {
                System.out.println("调用接口成功");
    
                JSONObject result = response.getJSONObject("result");
                JSONArray future = result.getJSONArray("future");
                String todayDate = DateUtil.formatDate(new Date());
                for (int i = 0; i < future.size(); i++) {
                    JSONObject jsonObj = future.getJSONObject(i);
                    String date = jsonObj.getStr("date");
                    if (!todayDate.equals(date)) {
                        continue;
                    }
                    String weatherStr = jsonObj.getStr("weather");
                    String temperature = jsonObj.getStr("temperature");
                    String[] temperatureArr = temperature.split("/");
                    Integer minTemperature = ReUtil.getFirstNumber(temperatureArr[0]);
                    Integer maxTemperature = ReUtil.getFirstNumber(temperatureArr[1]);
    
                    Weather weather = new Weather();
                    weather.setDate(date);
                    weather.setWeather(weatherStr);
                    weather.setMinTemperature(minTemperature);
                    weather.setMaxTemperature(maxTemperature);
                    return weather;
                }
                return null;
            } else {
                System.out.println("调用接口失败：" + response.getStr("reason"));
                return null;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    复制代码

发送邮件

public void send(Weather weather) {
        String text = String.format("今天是%s, 天气%s, 最高温度%d, 最低温度%d",
                weather.getDate(),
                weather.getWeather(),
                weather.getMaxTemperature(),
                weather.getMinTemperature());
        mailService.sendSimpleMail(mailUserConfig.getList(), text);
    }
    复制代码

public void sendSimpleMail(List<MailUser> userList, String text) {
        for (MailUser user : userList) {
            try {
                // 创建简单邮件消息
                SimpleMailMessage message = new SimpleMailMessage();
                // 谁发的
                message.setFrom("mundane799699@163.com");
                // 谁要接收
                message.setTo(user.getMailAddress());
                // 邮件标题
                message.setSubject("天气预报");
                String newText = String.format("亲爱的%s,\n%s", user.getName(), text);
                // 邮件内容
                message.setText(newText);
                mailSender.send(message);
            } catch (MailException e) {
                e.printStackTrace();
            }
        }
    }
    复制代码

创建一个定时任务

@Component
    public class WeatherTask {
    
        @Autowired
        private ScheduleService scheduleService;
    
        @Autowired
        private WeatherService weatherService;
    
        @Scheduled(cron = "0 0 7 * * ?")
        public void cron() {
            try {
                Weather weather = weatherService.queryWeather("杭州");
                String weatherStr = weather.getWeather();
                if (weatherStr.contains("雨") || weatherStr.contains("雪") || weatherStr.contains("雷")) {
                    scheduleService.send(weather);
                    System.out.println("发送成功");
                }
            } catch (Exception e) {
                e.printStackTrace();
                System.out.println("发送失败");
            }
        }
    }
    复制代码

### 部署到服务器 ###

先安装alibaba toolkit插件

![format_png 1][]

远程连接到阿里云，先给服务器安装jdk，可参考后面的参考文章。  
创建/springboot目录和/scripts目录。  
/springboot是个空目录，/scripts中放一个服务启动的脚本。  
脚本内容如下：

nohup java -jar /springboot/mail-0.0.1-SNAPSHOT.jar > nohup.log 2>&1 &
    复制代码

![format_png 2][]

用mvn package -Dmaven.test.skip=true 生成一下jar包 使用cloud toolkit部署，参考[Cloud Toolkit 部署应用到阿里云轻量应用服务器][Cloud Toolkit] 远程连接服务器，用ps -ef命令看一下进程是否起来

# 测试效果 #

调用接口看看效果

@RestController
    @RequestMapping("/weather")
    public class WeatherController {
    
        @Autowired
        private ScheduleService scheduleService;
    
        @Autowired
        private WeatherService weatherService;
    
        @GetMapping("/send")
        public String sendWeatherReport() {
            try {
                Weather weather = weatherService.queryWeather("杭州");
                scheduleService.send(weather);
            } catch (Exception e) {
                e.printStackTrace();
                return "发送失败";
            }
            return "发送成功";
        }
    }
    复制代码

![format_png 3][]

最后再附上一个配置文件的代码吧

server:
      port: 8088
    spring:
      mail:
        host: smtp.163.com
        port: 465
        username: 你的邮箱
        password: 你的邮箱授权码
        protocol: smtps
    mail:
      weather:
        apiUrl: http://apis.juhe.cn/simpleWeather/query
        apiKey: 你的apikey
      user:
        list:
          -
            name: 圆圆
            mailAddress: 发件人邮箱
          -
            name: 壮壮
            mailAddress: 发件人邮箱
          -
            name: 旺仔
            mailAddress: 发件人邮箱

[format_png]: https://img-blog.csdnimg.cn/img_convert/a48362fef0bd28c6428c278001af2ae4.webp?x-oss-process=image/format,png
[www.juhe.cn]: https://link.juejin.cn?target=https%3A%2F%2Fwww.juhe.cn%2F
[format_png 1]: https://img-blog.csdnimg.cn/img_convert/e14286e6cd138b6983e3bf35506b3bc6.webp?x-oss-process=image/format,png
[format_png 2]: https://img-blog.csdnimg.cn/img_convert/2cd482cdf0b0f83c153914db704dc565.webp?x-oss-process=image/format,png
[Cloud Toolkit]: https://link.juejin.cn?target=https%3A%2F%2Fdeveloper.aliyun.com%2Farticle%2F696335
[format_png 3]: https://img-blog.csdnimg.cn/img_convert/9e09bdb0698744860a0aed984d9d8d7f.webp?x-oss-process=image/format,png