1. activemq
首先引入依赖
pom.xml文件
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-activemq</artifactId>
</dependency>
创建一个配置队列类
JMSConfiguration.java
package com.wangx.boot.util;
import org.apache.activemq.command.ActiveMQQueue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jms.annotation.EnableJms;
import javax.jms.Destination;
@Configuration
@EnableJms
public class JMSConfiguration {
@Bean
public Destination createDestination () {
return new ActiveMQQueue("com.wangx");
}
}
创建一个消息生产者和消息消费者
package com.wangx.boot.mq;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.stereotype.Component;
import javax.jms.Destination;
@Component
public class JMSComponent {
@Autowired
private JmsMessagingTemplate jmsMessagingTemplate;
@Autowired
private Destination destination;
public void send (String message) {
jmsMessagingTemplate.convertAndSend(destination, message);
}
@JmsListener(destination = "com.wangx")
public void listener (String message) {
System.out.println("接收到的消息：" + message);
}
}
@JmsListener中的destination必须与队列配置类中定一的queue的名字相同。
SpringBoot提供了一个默认内置的消息队列中间件，如果我们使用spring.activemq.in-memory=true时将会使用内置的消息队列，但是它也提供了我们使用外部activemq的一些配置：
#spring.activemq.broker-url=
#spring.activemq.password=
#spring.activemq.user=
#spring.activemq.packages.trust-all=false
#spring.activemq.packages.trusted=
#spring.activemq.pool.configuration.*=
#spring.activemq.pool.enabled=false
#spring.activemq.pool.expiry-timeout=0
#spring.activemq.pool.idle-timeout=30000
#spring.activemq.pool.max-connections=1
测试消息发送
package com.wangx.boot.controller;
import com.wangx.boot.mq.JMSComponent;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping("/mq")
public class JMSController {
@Autowired
private JMSComponent jmsComponent;
@RequestMapping("/send")
@ResponseBody
public String send(String msg) {
jmsComponent.send(msg);
return msg;
}
}
当访问localhost:8080/mq/send?msg=xxx时，消费者的监听方法（带有@JmsListener注解的方法）会自动监听到消息，并打印到控制台上。
2. rabbitmq的使用
首先引入pom.xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-amqp</artifactId>
</dependency>
ps:rabbitmq和activemq的依赖不能同时存在。
首先还是创建一个队列配置类
AMQConfiguration.java
package com.wangx.boot.util;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class AMQConfiguration {
@Bean
public Queue queue() {
return new Queue("hello", true);
}
}
接着创建消息生产和消费组件
package com.wangx.boot.mq;
import org.springframework.amqp.core.AmqpTemplate;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Component
public class AMQComponent {
@Autowired
private AmqpTemplate amqpTemplate;
public void send(String message) {
amqpTemplate.convertAndSend("hello", message);
}
@RabbitListener(queues = "hello")
public void receiveQueue(String text) {
System.out.println("接受到：" + text);
}
}
在SpringBoot的启动类上添加@EnableRabbit表示开启rabbit消息队列。
测试是否发送了消息
package com.wangx.boot.controller;
import com.wangx.boot.mq.AMQComponent;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@RequestMapping("/amq")
public class AMQController {
@Autowired
private AMQComponent amqComponent;
@RequestMapping("/send")
@ResponseBody
public String send(String msg) {
amqComponent.send(msg);
return msg;
}
}
访问localhost:8080/amq/send?msg=xxx，在调用放松消息的方法时。监听的方法同样会收到消息，并打印到控制台上。
3. 调用rest服务
3.1 代码实现
首先引入依赖
pom文件
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
然后随便写一个Controller接口，如：
package com.wangx.boot.controller;
import com.wangx.boot.cache.CachingBook;
import com.wangx.boot.entity.Book;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
@RestController
@RequestMapping("/api")
public class ApiController {
@Autowired
private CachingBook cachingBook;
@RequestMapping(value = "/select", method = RequestMethod.GET)
public Book get(@RequestParam(defaultValue = "遮天") String name) {
Book book = cachingBook.findById(name);
return book;
}
@RequestMapping(value = "/update", method = RequestMethod.GET)
public Book update(@RequestParam(defaultValue = "遮天") String name) {
Book bean = cachingBook.findById(name);
bean.setAuthor("耳根");
cachingBook.updateById(bean);
return bean;
}
@RequestMapping(value = "/del", method = RequestMethod.GET)
public String del(@RequestParam(defaultValue = "遮天") String name) {
return cachingBook.deleteById(name);
}
}
启动服务，在另一个工程中使用RestTemplateBuilder来访问我们启动的服务，
@Autowired
private RestTemplateBuilder restTemplateBuilder;
/**
* get请求
*/
@Test
public void getForObject() {
//发送get请求
String res = restTemplateBuilder.build().getForObject("http://localhost:8080/api/select",String.class, "遮天");
System.out.println(res);
Map<String,Object> map = new HashMap<String,Object>();
map.put("name", "遮天");
//发送post请求
res = restTemplateBuilder.build().postForObject("http://localhost:8080/api/update", map, String.class);
System.out.println(res);
}
可以成功调用我们启动的服务的接口。
3.2 使用代理
使用RestTemplate还可以自己实现代理的功能。
测试方式：
String result = restTemplateBuilder.additionalCustomizers(new ProxyCustomizer()).build().getForObject("http://www.baidu.com", String.class);
System.out.println(result);
原文 SpringBoot学习笔记(11)-----SpringBoot中使用rabbitmq,activemq消息队列和rest服务的调用