"转：https://blog.csdn.net/qq_42175986/article/details/88576849 [图片] pom.xml org.springframework.boot spring-boot-starter-data-redis redis.clients jedis ...."

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redis实现消息队列-java代码实现

转：https://blog.csdn.net/qq_42175986/article/details/88576849

pom.xml

<!-- redis 依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
</dependency>
<!-- redis 依赖 -->

application.yml

spring:
  application:
      name: yys-redismq
  redis:
    host: 127.0.0.1
    port: 6379
    password: 123456
    pool:
      max-active: 100
      max-idle: 10
      min-idle: 0
      max-wait: 100000
    timeout: 0
    database: 2
server:
port: 8081
tomcat:
uri-encoding: UTF-8

RedisConfig.java

package com.yys.demo.config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import redis.clients.jedis.JedisPoolConfig;
/**


描述：redis 配置类


@author yys


@date 2019.03.15
*/
@Configuration
public class RedisConfig {
/** redis 服务器地址 */
@Value("${spring.redis.host}")
private String host;
/** redis 端口号 */
@Value("${spring.redis.port}")
private int port;
/** redis 服务器密码 */
@Value("${spring.redis.password}")
private String password;
/** redis 连接池最大连接数 (使用负值无限制) */
@Value("${spring.redis.pool.max-active}")
private int maxActive;
/** redis 连接池最大空闲数 */
@Value("${spring.redis.pool.max-idle}")
private int maxIdle;
/** redis 连接池小空闲数 */
@Value("${spring.redis.pool.min-idle}")
private int minIdle;
/** redis 连接池最大阻塞等待时间 (负值无限制) */
@Value("${spring.redis.pool.max-wait}")
private int maxWait;
/** redis 数据库索引 (默认 0) */
@Value("${spring.redis.database}")
private int database;
/** redis 超时时间 */
@Value("${spring.redis.timeout}")
private int timeout;
@Bean
public JedisPoolConfig getRedisConfig(){
JedisPoolConfig config = new JedisPoolConfig();
config.setMaxTotal(maxActive);
config.setMaxIdle(maxIdle);
config.setMinIdle(minIdle);
config.setMaxWaitMillis(maxWait);
return config;
}
@Bean
public JedisConnectionFactory getConnectionFactory() {
JedisConnectionFactory factory = new JedisConnectionFactory();
factory.setHostName(host);
factory.setPort(port);
factory.setPassword(password);
factory.setDatabase(database);
JedisPoolConfig config = getRedisConfig();
factory.setPoolConfig(config);
return factory;
}
@Bean
public RedisTemplate<?, ?> getRedisTemplate() {
JedisConnectionFactory factory = getConnectionFactory();
RedisTemplate<?, ?> redisTemplate = new StringRedisTemplate(factory);
return redisTemplate;
}


}

RedisClient.java

package com.yys.demo.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;
/**


描述：redis 工具类 (本配置类只有 redis 消息队列相关命令方法)


@author yys


@date 2019.03.15
*/
@Component
public class RedisClient {
@Autowired
private RedisTemplate<String, Object> redisTemplate;
/ ---------------------------------- redis 消息队列 ---------------------------------- */
/

存值
@param key 键
@param value 值
@return
*/
public boolean lpush(String key, Object value) {
try {
redisTemplate.opsForList().leftPush(key, value);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}

/**

取值 - <rpop：非阻塞式 >
@param key 键
@return
*/
public Object rpop(String key) {
try {
return redisTemplate.opsForList().rightPop(key);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}

/**

取值 - <brpop：阻塞式 > - 推荐使用
@param key 键
@param timeout 超时时间
@param timeUnit 给定单元粒度的时间段

            TimeUnit.DAYS          //天



            TimeUnit.HOURS         //小时



            TimeUnit.MINUTES       //分钟



            TimeUnit.SECONDS       //秒



            TimeUnit.MILLISECONDS  //毫秒


@return
*/
public Object brpop(String key, long timeout, TimeUnit timeUnit) {
try {
return redisTemplate.opsForList().rightPop(key, timeout, TimeUnit.SECONDS);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}

/**

查看值
@param key 键
@param start 开始
@param end 结束 0 到 -1 代表所有值
@return
*/
public List<Object> lrange(String key, long start, long end) {
try {
return redisTemplate.opsForList().range(key, start, end);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}

/** ---------------------------------- redis 消息队列 ---------------------------------- */


}

RedisProducerController.java

package com.yys.demo.controller;
import com.yys.demo.config.RedisClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Arrays;
import java.util.List;
/**


描述：生产者 (消息发送方)


@author yys


@date 2019.03.15
*/
@RestController
@RequestMapping("/producer")
public class RedisProducerController {
@Autowired
RedisClient redisClient;
/** 公共配置 */
private final static String SUCCESS = "success";
private final static String MESSAGE = "testmq";
private static final List<String> list;
static {
list = Arrays.asList(new String[]{"猿医生", "CD", "yys"});
}
/**

消息发送 API
@return
*/
@RequestMapping("/sendMessage")
public String sendMessage() {
for (String message : list) {
redisClient.lpush(MESSAGE, message);
}
return SUCCESS;
}



}

RedisConsumerController.java

package com.yys.demo.controller;
import com.yys.demo.config.RedisClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.concurrent.TimeUnit;
/**


描述：消费者 (消息接收方)


@author yys


@date 2019.03.15
*/
@RestController
@RequestMapping("/consumer")
public class RedisConsumerController {
@Autowired
RedisClient redisClient;
/** 公共配置 */
private final static String MESSAGE = "testmq";
/**

接收消息 API
@return
*/
@RequestMapping("/receiveMessage")
public String sendMessage() {
return (String) redisClient.brpop(MESSAGE, 0, TimeUnit.SECONDS);
}



}

注：批量消费消息例子如下

package com.cashloan.analytics.controller;
import com.cashloan.analytics.model.DcProjectCount;
import com.cashloan.analytics.utils.RedisQueue;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.TimeUnit;
@RestController
@RequestMapping("/test")
public class Test {
@Autowired
private RedisQueue redisQueue;
</span><span style="color: rgba(0, 128, 0, 1)">/**</span><span style="color: rgba(0, 128, 0, 1)"> 公共配置 </span><span style="color: rgba(0, 128, 0, 1)">*/</span>
<span style="color: rgba(0, 0, 255, 1)">private</span> <span style="color: rgba(0, 0, 255, 1)">final</span> <span style="color: rgba(0, 0, 255, 1)">static</span> String MESSAGE = "testmq"<span style="color: rgba(0, 0, 0, 1)">;

@RequestMapping(</span>"/send"<span style="color: rgba(0, 0, 0, 1)">)
</span><span style="color: rgba(0, 0, 255, 1)">public</span><span style="color: rgba(0, 0, 0, 1)"> String sendMessage(String[] strs) {
    List</span>&lt;String&gt; str =<span style="color: rgba(0, 0, 0, 1)"> Arrays.asList(strs);
    </span><span style="color: rgba(0, 0, 255, 1)">for</span><span style="color: rgba(0, 0, 0, 1)"> (String msg : str) {
        DcProjectCount dcProjectCount </span>= <span style="color: rgba(0, 0, 255, 1)">new</span><span style="color: rgba(0, 0, 0, 1)"> DcProjectCount();
        dcProjectCount.setId(Long.valueOf(msg));
        redisQueue.lpush(MESSAGE, dcProjectCount);
    }
    </span><span style="color: rgba(0, 0, 255, 1)">return</span> "1"<span style="color: rgba(0, 0, 0, 1)">;
}

@GetMapping(</span>"/see"<span style="color: rgba(0, 0, 0, 1)">)
</span><span style="color: rgba(0, 0, 255, 1)">public</span> List&lt;Object&gt;<span style="color: rgba(0, 0, 0, 1)"> see() {
    List</span>&lt;Object&gt; lrange = redisQueue.lrange(MESSAGE, 0, -1<span style="color: rgba(0, 0, 0, 1)">);
    </span><span style="color: rgba(0, 0, 255, 1)">return</span><span style="color: rgba(0, 0, 0, 1)"> lrange;
}

@GetMapping(</span>"/get"<span style="color: rgba(0, 0, 0, 1)">)
</span><span style="color: rgba(0, 0, 255, 1)">public</span><span style="color: rgba(0, 0, 0, 1)"> Object get() {
    List</span>&lt;Object&gt; lrange = redisQueue.lrange(MESSAGE, 0, -1<span style="color: rgba(0, 0, 0, 1)">);
    </span><span style="color: rgba(0, 0, 255, 1)">int</span> size =<span style="color: rgba(0, 0, 0, 1)"> lrange.size();
    System.out.println(</span>"size:" +<span style="color: rgba(0, 0, 0, 1)"> size);
    </span><span style="color: rgba(0, 0, 255, 1)">if</span> (size &gt;= 10<span style="color: rgba(0, 0, 0, 1)">) {
        List</span>&lt;DcProjectCount&gt; dcProjectCounts = <span style="color: rgba(0, 0, 255, 1)">new</span> ArrayList&lt;&gt;<span style="color: rgba(0, 0, 0, 1)">();
        </span><span style="color: rgba(0, 0, 255, 1)">for</span> (<span style="color: rgba(0, 0, 255, 1)">int</span> i = 0; i &lt; size; i++<span style="color: rgba(0, 0, 0, 1)">) {
            Object brpop </span>= redisQueue.brpop(MESSAGE, 0<span style="color: rgba(0, 0, 0, 1)">, TimeUnit.SECONDS);
            </span><span style="color: rgba(0, 0, 255, 1)">if</span> (brpop != <span style="color: rgba(0, 0, 255, 1)">null</span><span style="color: rgba(0, 0, 0, 1)">) {
                dcProjectCounts.add((DcProjectCount) brpop);
            }
        }
        </span><span style="color: rgba(0, 0, 255, 1)">for</span><span style="color: rgba(0, 0, 0, 1)"> (DcProjectCount dcProjectCount : dcProjectCounts) {
            System.out.println(dcProjectCount.getId());
        }
    }
    </span><span style="color: rgba(0, 0, 255, 1)">return</span> "true"<span style="color: rgba(0, 0, 0, 1)">;
}

}

DcProjectCount 类只要设置 private Long id 并添加 set、get 方法即可！

redis实现消息队列-java代码实现

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