Foreword
During the National Day, it is said to prevent people from improper remarks published in major festivals, many of ip can kxsw have been closed, but when will it re-opened, not nothing went ping it, so I wrote a regular task timing ping Google server, if ping the e-mail notification, take a look at is how to do it!
Ping Tools
First, ensure that your computer before you can access Google's (shadowsocks), this class is designed to ping Google, equivalent to manual input ping www.google.com.
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/**
* @author: zp
* @Date: 2019-10-08 11:31
* @Description:
*/
public class PingUtils {
public static boolean ping02(String ipAddress){
// 读取的行信息
String line =line = null;
// 相当于cmd服务
Process exec = null;
// ping 的结果
boolean res = true;
try {
exec = Runtime.getRuntime().exec("ping " + ipAddress);
BufferedReader br = new BufferedReader(new InputStreamReader(exec.getInputStream()));
// 最多执行三秒
long endTime = System.currentTimeMillis()+3000;
// 测试输出行中是否有ttl字符串，有就说明ping通了
while ((res=true)==true&&(line = br.readLine()).indexOf("ttl")<0){
System.out.println("line = " + line);
res = false;
// 三秒还是ping不通则放弃尝试
if(System.currentTimeMillis()>endTime){
break;
}
}
System.out.println("line = " + line);
} catch (IOException e) {
e.printStackTrace();
} finally {
exec.destroy();
return res;
}
}
}
Send e-mail tools
Send e-mail first need to introduce two jar package:
maven
<dependency> <groupId>javax.mail</groupId> <artifactId>javax.mail-api</artifactId> <version>1.6.2</version> </dependency> <dependency> <groupId>com.sun.mail</groupId> <artifactId>javax.mail</artifactId> <version>1.6.2</version> </dependency>gradle
compile group: 'javax.mail', name: 'javax.mail-api', version: '1.6.2' compile group: 'com.sun.mail', name: 'javax.mail', version: '1.6.2'It is worth noting: mailbox password is the QQ-mail service has been opened stmp client authorization code! ! ! This is similar to sjhabsjhdabasf string.
import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.AddressException; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import java.util.Properties; /** * @author: zp * @Date: 2019-10-08 14:13 * @Description: */ public class MailUtils { public static void sendQQMail() throws AddressException, MessagingException { Properties properties = new Properties(); // 连接协议 properties.put("mail.transport.protocol", "smtp"); // 主机名 properties.put("mail.smtp.host", "smtp.qq.com"); // 端口号 properties.put("mail.smtp.port", 465); properties.put("mail.smtp.auth", "true"); // 设置是否使用ssl安全连接 ---一般都使用 properties.put("mail.smtp.ssl.enable", "true"); // 设置是否显示debug信息 true 会在控制台显示相关信息 properties.put("mail.debug", "true"); // 得到回话对象 Session session = Session.getInstance(properties); // 获取邮件对象 Message message = new MimeMessage(session); // 设置发件人邮箱地址 message.setFrom(new InternetAddress("[email protected]")); // 设置收件人邮箱地址，可以有多个收件人 message.setRecipients(Message.RecipientType.TO, new InternetAddress[]{new InternetAddress("[email protected]")}); // 设置邮件标题 message.setSubject("ping结果"); // 设置邮件内容 message.setText("您的IP解封了，成功ping通谷歌！"); // 得到邮差对象 Transport transport = session.getTransport(); // 连接自己的邮箱账户，密码为QQ邮箱开通的stmp服务后得到的客户端授权码！！！ transport.connect("[email protected]", "**********"); // 发送邮件 transport.sendMessage(message, message.getAllRecipients()); transport.close(); } }
Timing task class
这个类采用的是基于SchedulingConfigurer接口的，在ping通后，会修改cron表达式的值，防止重复发送邮件。（之前一分钟测一次，现在一天测一次）
```java
import com.example.demojpa.utils.MailUtils;
import com.example.demojpa.utils.PingUtils;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* @author: zp
* @Date: 2019-10-08 16:22:20
* @Description:
*/
@Configuration
@EnableScheduling
public class TaskBasedInterface implements SchedulingConfigurer {
/**
* 每小时执行一次
*/
private static String cron = "0 */1 * * * ?";
@Override
public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
taskRegistrar.addCronTask(()-> {
// 测试连接
boolean connected = PingUtils.ping02("www.google.com");
if(connected){
try {
// 修改cron表达式，每天凌晨执行给我发邮件
cron = "0 0 0 * * ? *";
MailUtils.sendQQMail();
log("已成功ping通！");
return;
} catch (Exception e) {
e.printStackTrace();
}
}
log("ping不通");
},cron);
}
public static void log(String message) {
DateFormat df = new SimpleDateFormat("YYYY-MM-dd HH:mm:ss");
String date = df.format(new Date(System.currentTimeMillis()));
System.out.println(date + " "+message);
}
}
```result
Afterword
Can have the knowledge to do some interesting things really boost your interest in the technology of it, anyway, I come to understand.