88--spring cloud (Springboot 整合RabbitMQ)

RabbitMQ - Spring boot 整合

新建项目

导入依赖RabbtiMQ

pom.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.jt</groupId>
    <artifactId>springBootDemo-rabbitmq</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springBootDemo-rabbitmq</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.3.0.RELEASE</spring-boot.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.amqp</groupId>
            <artifactId>spring-rabbit-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.0.RELEASE</version>
                <configuration>
                    <mainClass>com.jt.SpringBootDemoRabbitmqApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

application.yml配置

spring:
  rabbitmq:
    host: 120.53.24.172
    username: admin
    password: admin

简单模式

主程序

Spring提供的Queue类,是队列的封装对象,它封装了队列的参数信息.

RabbitMQ的自动配置类,会发现这些Queue实例,并在RabbitMQ服务器中定义这些队列.

package com.jt;

import org.springframework.amqp.core.Queue;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class SpringBootDemoRabbitmqApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootDemoRabbitmqApplication.class, args);
    }
    @Bean
	public Queue task_queue() {
		/*
		 * 可用以下形式: 
		 * new Queue("helloworld") - 持久,非排他,非自动删除
		 * new Queue("helloworld",false,false,false,null)
		 */
		return new Queue("helloworld",false);
	}

}

生产者

AmqpTemplate是rabbitmq客户端API的一个封装工具,提供了简便的方法来执行消息操作.

AmqpTemplate由自动配置类自动创建

package com.jt.m1;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class SimpleSender {
	@Autowired
	AmqpTemplate t;
	
	public void send() {
		// 这里向 helloworld 队列发送消息
		t.convertAndSend("helloworld", "Hello world!! "+System.currentTimeMillis());
		System.out.println("消息已发送");
	}

}

消费者

通过@RabbitListener从指定的队列接收消息

使用@RebbitHandler注解的方法来处理消息

package com.jt.m1;

import org.springframework.amqp.core.Queue;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

@Component
@RabbitListener(queues = "helloworld")
public class SimpleReceiver {
	@RabbitHandler
	public void receive(String msg) {
		System.out.println("收到: "+msg);
	}
	
}

这里还可以使用另一种形式:

@Component
public class SimpleReceiver {
	@RabbitListener(queues = "helloworld")
	public void receive(String msg) {
		System.out.println("收到: "+msg);
	}
}

另外,@RabbitListener 注解中也可以直接定义队列:

	@RabbitListener(queuesToDeclare = @Queue(name = "helloworld",durable = "false"))

测试类

在存放测试代码的目录中,创建测试类

package com.jt.m1;

import java.util.Scanner;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class SimpleTests {
	@Autowired
	SimpleSender simpleSender;

	@Test
	void test1() throws Exception {
		while(true) {
			
			simpleSender.send();
			System.out.println("[按回车结束]");
			new Scanner(System.in).nextLine();
		}
	}

}

工作模式

主程序

在主程序中创建名为task_queue的持久队列

package com.jt;

import org.springframework.amqp.core.Queue;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class SpringBootDemoRabbitmqApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootDemoRabbitmqApplication.class, args);
    }
    @Bean
	public Queue task_queue() {
		// 这个构造方法创建的队列参数为: 持久,非排他,非自动删除
		return new Queue("task_queue");
	}
//    @Bean
//	public Queue task_queue() {
//		/*
//		 * 可用以下形式: 
//		 * new Queue("helloworld") - 持久,非排他,非自动删除
//		 * new Queue("helloworld",false,false,false,null)
//		 */
//		return new Queue("helloworld",false);
//	}

}

生产者

package com.jt.m2;

import java.util.Scanner;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class WorkSender {
	@Autowired
	AmqpTemplate t;
	
	public void send() {
		while (true) {
			System.out.print("输入:");
			String s = new Scanner(System.in).nextLine();
			
			//spring 默认将消息的 DeliveryMode 设置为 PERSISTENT 持久化,
			t.convertAndSend("task_queue", s);
		}
	}

}

spring boot封装的 rabbitmq api 中, 发送的消息默认是持久化消息.
如果希望发送非持久化消息, 需要在发送消息时做以下设置:

使用 MessagePostProcessor 前置处理器参数
从消息中获取消息的属性对象
在属性中把 DeliveryMode 设置为非持久化

	//如果需要设置消息为非持久化,可以取得消息的属性对象,修改它的deliveryMode属性
	t.convertAndSend("task_queue", (Object) s, new MessagePostProcessor() {
		@Override
		public Message postProcessMessage(Message message) throws AmqpException {
			MessageProperties props = message.getMessageProperties();
			props.setDeliveryMode(MessageDeliveryMode.NON_PERSISTENT);
			return message;
		}
	});

消费者

ack模式

在 spring boot 中提供了三种确认模式:

NONE - 使用rabbitmq的自动确认
AUTO - 使用rabbitmq的手动确认, springboot会自动发送确认回执 (默认)
MANUAL - 使用rabbitmq的手动确认, 且必须手动执行确认操作

默认的 AUTO 模式中, 处理消息的方法抛出异常, 则表示消息没有被正确处理, 该消息会被重新发送.

设置 ack 模式

spring:
  rabbitmq:
    listener:
      simple:
        # acknowledgeMode: NONE # rabbitmq的自动确认
        acknowledgeMode: AUTO # rabbitmq的手动确认, springboot会自动发送确认回执 (默认)
        # acknowledgeMode: MANUAL # rabbitmq的手动确认, springboot不发送回执, 必须自己编码发送回执

手动执行确认操作

如果设置为 MANUAL 模式,必须手动执行确认操作

	@RabbitListener(queues="task_queue")
	public void receive1(String s, Channel c, @Header(name=AmqpHeaders.DELIVERY_TAG) long tag) throws Exception {
		System.out.println("receiver1 - 收到: "+s);
		for (int i = 0; i < s.length(); i++) {
			if (s.charAt(i) == '.') {
				Thread.sleep(1000);
			}
		}
		// 手动发送确认回执
		c.basicAck(tag, false);
	}

抓取数量

工作模式中, 为了合理地分发数据, 需要将 qos 设置成 1, 每次只接收一条消息, 处理完成后才接收下一条消息.

spring boot 中是通过 prefetch 属性进行设置, 改属性的默认值是 250.

spring:
  rabbitmq:
    listener:
      simple:
        prefetch: 1 # qos=1, 默认250

消费者代码

package com.jt.m2;

import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.messaging.handler.annotation.Header;
import org.springframework.stereotype.Component;

import com.rabbitmq.client.Channel;


@Component
public class WorkReceiver1 {
	@RabbitListener(queues="task_queue")
	public void receive1(String s, Channel c, @Header(name=AmqpHeaders.DELIVERY_TAG) long tag) throws Exception {
		System.out.println("receiver1 - 收到: "+s);
		for (int i = 0; i < s.length(); i++) {
			if (s.charAt(i) == '.') {
				Thread.sleep(1000);
			}
		}
		c.basicAck(tag,false);
	}
	
	@RabbitListener(queues="task_queue")
	public void receive2(String s, Channel c, @Header(name=AmqpHeaders.DELIVERY_TAG) long tag) throws Exception {
		System.out.println("receiver2 - 收到: "+s);
		for (int i = 0; i < s.length(); i++) {
			if (s.charAt(i) == '.') {
				Thread.sleep(1000);
			}
		}
		c.basicAck(tag,false);
	}
	
}

发布和订阅模式

主程序

创建 FanoutExcnahge 实例, 封装 fanout 类型交换机定义信息.

spring boot 的自动配置类会自动发现交换机实例, 并在 RabbitMQ 服务器中定义该交换机.

package cn.tedu.rabbitmq.m3;

import org.springframework.amqp.core.FanoutExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class,args);
    }


    //定义一个交换机
    @Bean
    public FanoutExchange LogsExchange(){
        return  new FanoutExchange("logs",false,false);//非持久 不自动删除

    }
}

生产者

生产者向指定的交换机 logs 发送数据.

不需要指定队列名或路由键, 即使指定也无效, 因为 fanout 交换机会向所有绑定的队列发送数据, 而不是有选择的发送.

package cn.tedu.rabbitmq.m3;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Scanner;
//发布订阅模式
@Component
public class Producer {
    @Autowired
    private AmqpTemplate amqpTemplate;

    public  void send(){
        while (true){
            System.out.println("输入消息");
            String msg = new Scanner(System.in).nextLine();
            amqpTemplate.convertAndSend("logs","",msg);
        }
    }

}

消费者

消费者需要执行以下操作:

定义随机队列(随机命名,非持久,排他,自动删除)
定义交换机(可以省略, 已在主程序中定义)
将队列绑定到交换机

spring boot 通过注解完成以上操作:

@RabbitListener(bindings = @QueueBinding( //这里进行绑定设置
	value = @Queue, //这里定义随机队列,默认属性: 随机命名,非持久,排他,自动删除
	exchange = @Exchange(name = "logs", declare = "false") //指定 logs 交换机,因为主程序中已经定义,这里不进行定义
))

package cn.tedu.rabbitmq.m3;

import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Component
public class Consumer {
    
    //定义两个消费者
    //交换机 随机队列 绑定
    @RabbitListener(bindings = @QueueBinding(
            exchange = @Exchange(name = "logs",declare = "false"),
            value =@Queue //若无参数 则为随机队列 非持久 独占 自动删除

    ))
    public void receiver1(String s){

        System.out.println("消费者1收到"+s);
    }

    @RabbitListener(bindings = @QueueBinding(
            exchange = @Exchange(name = "logs",declare = "false"),
            value =@Queue //若无参数 则为随机队列 非持久 独占 自动删除

    ))
    public void receiver2(String s){

        System.out.println("消费者2收到"+s);
    }
}

测试类

package cn.tedu.rabbitmq.m3;

import cn.tedu.rabbitmq.m3.Producer;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class Test3 {

    @Autowired
    Producer producer;
    @Test
    public  void  test1(){
        producer.send();
    }

}

路由模式

与发布和订阅模式代码类似, 只是做以下三点调整:

使用 direct 交换机
队列和交换机绑定时, 设置绑定键
发送消息时, 指定路由键

主程序

主程序中使用 DirectExcnahge 对象封装交换机信息, spring boot 自动配置类会自动发现这个对象, 并在 RabbitMQ 服务器上定义这个交换机.

package cn.tedu.rabbitmq.m4;

import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.FanoutExchange;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
//路由模式
@SpringBootApplication
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class,args);
    }


    //定义一个交换机
    @Bean
    public DirectExchange directLogsExchange(){

        return  new DirectExchange("direct_logs",false,false);//非持久 不自动删除

    }
}

生产者

生产者向指定的交换机发送消息, 并指定路由键.

package cn.tedu.rabbitmq.m4;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Scanner;

//发布订阅模式
@Component
public class Producer {
    @Autowired
    private AmqpTemplate amqpTemplate;

    public  void send(){
        while (true){
            System.out.println("输入消息");
            String msg = new Scanner(System.in).nextLine();
            System.out.println("输入路由键");
            String key = new Scanner(System.in).nextLine();
            amqpTemplate.convertAndSend("direct_logs",key,msg);
        }
    }

}

消费者

消费者通过注解来定义随机队列, 绑定到交换机, 并指定绑定键:

@RabbitListener(bindings = @QueueBinding( // 这里做绑定设置
	value = @Queue, // 定义队列, 随机命名,非持久,排他,自动删除
	exchange = @Exchange(name = "direct_logs", declare = "false"), // 指定绑定的交换机,主程序中已经定义过队列,这里不进行定义
	key = {"error","info","warning"} // 设置绑定键
))

package cn.tedu.rabbitmq.m4;

import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Component
public class Consumer {
    //交换机 随机队列  使用绑定键绑定
    @RabbitListener(bindings = @QueueBinding(
            exchange = @Exchange(name = "direct_logs",declare = "false"),
            value =@Queue, //若无参数 则为随机队列 非持久 独占 自动删除
            key = {"error"}
    ))
    public void receiver1(String s){

        System.out.println("消费者1收到"+s);
    }

    //交换机 随机队列  使用绑定键绑定
    @RabbitListener(bindings = @QueueBinding(
            exchange = @Exchange(name = "direct_logs",declare = "false"),
            value =@Queue, //若无参数 则为随机队列 非持久 独占 自动删除
            key = {"error","info","warning"}
    ))
    public void receiver2(String s){

        System.out.println("消费者2收到"+s);
    }
}

测试类

package cn.tedu.rabbitmq.m4;

import cn.tedu.rabbitmq.m4.Producer;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class Test4 {

    @Autowired
    Producer producer;
    @Test
    public  void  test1(){

        producer.send();
    }
}

主题模式

主题模式不过是具有特殊规则的路由模式, 代码与路由模式基本相同, 只做如下调整:

使用 topic 交换机
使用特殊的绑定键和路由键规则

主程序

package cn.tedu.rabbitmq.m5;

import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

//路由模式
@SpringBootApplication
public class Main {
    public static void main(String[] args) {
        SpringApplication.run(Main.class,args);
    }


    //定义一个交换机
    @Bean
    public TopicExchange directLogsExchange(){

        return  new TopicExchange("topic_logs",false,false);//非持久 不自动删除

    }
}

生产者

package cn.tedu.rabbitmq.m5;

import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.Scanner;

//发布订阅模式
@Component
public class Producer {
    @Autowired
    private AmqpTemplate amqpTemplate;

    public  void send(){
        while (true){
            System.out.println("输入消息");
            String msg = new Scanner(System.in).nextLine();
            System.out.println("输入路由键");
            String key = new Scanner(System.in).nextLine();
            amqpTemplate.convertAndSend("topic_logs",key,msg);
        }
    }

}

消费者

package cn.tedu.rabbitmq.m5;

import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Component
public class Consumer {
    //交换机 随机队列  使用绑定键绑定
    @RabbitListener(bindings = @QueueBinding(
            exchange = @Exchange(name = "topic_logs",declare = "false"),
            value =@Queue, //若无参数 则为随机队列 非持久 独占 自动删除
            key = {"*.orange.*"}
    ))
    public void receiver1(String s){

        System.out.println("消费者1收到"+s);
    }

    //交换机 随机队列  使用绑定键绑定
    @RabbitListener(bindings = @QueueBinding(
            exchange = @Exchange(name = "topic_logs",declare = "false"),
            value =@Queue, //若无参数 则为随机队列 非持久 独占 自动删除
            key = {"*.*.rabbit","lazy.#"}
    ))
    public void receiver2(String s){

        System.out.println("消费者2收到"+s);
    }
}

测试

package cn.tedu.rabbitmq.m5;

import cn.tedu.rabbitmq.m5.Producer;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class Test5 {

    @Autowired
    Producer producer;
    @Test
    public  void  test1(){

        producer.send();
    }
}

RPC异步调用

主程序

主程序中定义两个队列

发送调用信息的队列: rpc_queue
返回结果的队列: 随机命名

package cn.tedu.m6;

import java.util.UUID;

import org.springframework.amqp.core.Queue;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class Main {

	public static void main(String[] args) {
		SpringApplication.run(Main.class, args);
	}
	@Bean
	public Queue sendQueue() {
		return new Queue("rpc_queue",false);
	}
	@Bean
	public Queue rndQueue() {
		return new Queue(UUID.randomUUID().toString(), false);
	}
}

服务端

从rpc_queue接收调用数据, 执行运算求斐波那契数,并返回计算结果.
@Rabbitlistener注解对于具有返回值的方法:

会自动获取 replyTo 属性
自动获取 correlationId 属性
向 replyTo 属性指定的队列发送计算结果, 并携带 correlationId 属性

package cn.tedu.m6;

import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Component
public class RpcServer {
	@RabbitListener(queues = "rpc_queue")
	public long getFbnq(int n) {
		return f(n);
	}

	private long f(int n) {
		if (n==1 || n==2) {
			return 1;
		}
		return f(n-1) + f(n-2);
	}
}

客户端

使用 SPEL 表达式获取随机队列名: "#{rndQueue.name}"

发送调用数据时, 携带随机队列名和correlationId

从随机队列接收调用结果, 并获取correlationId

package cn.tedu.m6;

import java.util.UUID;

import org.springframework.amqp.AmqpException;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessagePostProcessor;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.messaging.handler.annotation.Header;
import org.springframework.stereotype.Component;

@Component
public class RpcClient {
	@Autowired
	AmqpTemplate t;
	
	@Value("#{rndQueue.name}")
	String rndQueue;
	
	public void send(int n) {
		// 发送调用信息时, 通过前置消息处理器, 对消息属性进行设置, 添加返回队列名和关联id
		t.convertAndSend("rpc_queue", (Object)n, new MessagePostProcessor() {
			@Override
			public Message postProcessMessage(Message message) throws AmqpException {
				MessageProperties p = message.getMessageProperties();
				p.setReplyTo(rndQueue);
				p.setCorrelationId(UUID.randomUUID().toString());
				return message;
			}
		});
	}
	
	//从随机队列接收计算结果
	@RabbitListener(queues = "#{rndQueue.name}")
	public void receive(long r, @Header(name=AmqpHeaders.CORRELATION_ID) String correlationId) {
		System.out.println("\n\n"+correlationId+" - 收到: "+r);
	}
	
}

测试类

package cn.tedu.m6;

import java.util.Scanner;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
class TopicTests {
	@Autowired
	RpcClient client;

	@Test
	void test1() throws Exception {
		while (true) {
			System.out.print("求第几个斐波那契数: ");
			int n = new Scanner(System.in).nextInt();
			client.send(n);
		}
	}

}

posted on 2020-08-31 21:47 liqiangbk 阅读(382) 评论(0) 编辑收藏举报

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