Redis在springboot项目的使用

一、在pom.xml配置redis依赖

<!-- redis客户端代码 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- json工具 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.49</version>
</dependency>
<!-- redis需要用到这个依赖,否则报错 -->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

二、在common包中自定义一个RedisService以及其实现类

Redis的方法比较复杂，可以将经常使用的抽取成方法，形成工具类，方便调用（使用接口加实现类的方式）；调用redis时，如下

@Autowired

private RedisService redisService;

RedisService.java接口

package cn.kooun.common.redis;

import cn.kooun.common.redis.entity.MessageCommon;

/**
 * redis service
 */
public interface RedisService {
	/**
	 * 添加
	 *
	 * @param key
	 * @param value
	 * @return
	 */
	boolean set(final String key, Object value);
	/**
	 * 添加 有生命周期
	 *
	 * @param key
	 * @param value
	 * @param expireTime
	 * @return
	 */
	boolean set(final String key, Object value, Long expireTime);
	/**
	 * 获取
	 *
	 * @param key
	 * @return
	 */
	Object get(String key);
	/**
	 * 删除
	 *
	 * @param key
	 */
	void delete(final String key);
	/**
	 * 	发送广播消息
	 * @param topic
	 * @param body
	 */
	void sendTopic(String topic, MessageCommon body);
}

实现类RedisServiceImpl.java

package cn.kooun.common.redis.impl;

import java.util.concurrent.TimeUnit;

import javax.annotation.Resource;

import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Service;

import com.alibaba.fastjson.JSON;

import cn.kooun.common.redis.RedisService;
import cn.kooun.common.redis.entity.MessageCommon;

/**
 * redis工具类
 */
@Service
public class RedisServiceImpl implements RedisService{
	@Resource
    private RedisTemplate<String, Object> redisTemplate;

	/**
	 * 添加
	 *
	 * @param key
	 * @param value
	 * @return
	 */
	@SuppressWarnings("all")
	@Override
    public boolean set(final String key, Object value) {
        boolean result = false;
    	ValueOperations<String, Object> operations = redisTemplate.opsForValue();
    	operations.set(key, value);
    	return true;
    }
	/**
	 * 添加带生命周期
	 */
	@Override
    public boolean set(final String key, Object value, Long expireTime) {
        boolean result = false;
        ValueOperations<String, Object> operations = redisTemplate.opsForValue();
        operations.set(key, value, expireTime, TimeUnit.SECONDS);
        result = true;
        return result;
    }
	/**
	 * 获取
	 */
	@Override
	public Object get(final String key) {
		ValueOperations<String, Object> operations = redisTemplate.opsForValue();
		return operations.get(key);
	}
	/**
	 * 删除
	 */
	@Override
	@SuppressWarnings("all")
    public void delete(final String key) {
		redisTemplate.delete(key);
    }

	/**
	 * 	发送广播消息
	 */
	@Override
	public void sendTopic(String topic,MessageCommon body) {
		body.setConsumerTopic(topic);
		redisTemplate.convertAndSend(topic,JSON.toJSONString(body));
	}
}

redis广播消息体实体类MessageCommon

package cn.kooun.common.redis.entity;

/**
 *  redis广播消息体实体类
 * @author chenWei
 * @date 2019年11月7日 上午10:47:08
 */
public class MessageCommon {
	/**对方监听器执行回调的方法名*/
	private String method;
	/**消息体*/
	private String body;
	/**消息生产者的消费主题,便于回复消息*/
	private String producerTopic;
	/**消费者消费的主题*/
	private String consumerTopic;

	public MessageCommon(String method, String body) {
		this.method = method;
		this.body = body;
	}

	public String getMethod() {
		return method;
	}
	public void setMethod(String method) {
		this.method = method;
	}
	public String getBody() {
		return body;
	}
	public void setBody(String body) {
		this.body = body;
	}

	public String getProducerTopic() {
		return producerTopic;
	}

	public void setProducerTopic(String producerTopic) {
		this.producerTopic = producerTopic;
	}

	public String getConsumerTopic() {
		return consumerTopic;
	}

	public void setConsumerTopic(String consumerTopic) {
		this.consumerTopic = consumerTopic;
	}

	@Override
	public String toString() {
		return "MessageCommon [method=" + method + ", body=" + body + ", producerTopic=" + producerTopic
				+ ", consumerTopic=" + consumerTopic + "]";
	}

}

三、redis可视化工具乱码（springboot中添加一个类）

package cn.kooun.common.redis;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

/**
 * 	解决redis可视化工具乱码问题
 * @author HuangJingNa
 * @date 2019年12月21日 下午3:15:19
 *
 */
@Configuration
public class RedisConfigBean {

    /**
     * redis 防止key value 前缀乱码.
     *
     * @param factory redis连接 factory
     * @return redisTemplate
     */
    @Bean(name = "redisTemplate")
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(factory);
        template.setKeySerializer(new StringRedisSerializer());
        template.setValueSerializer(new GenericJackson2JsonRedisSerializer());
        template.setHashKeySerializer(new GenericJackson2JsonRedisSerializer());
        template.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
        template.afterPropertiesSet();
        return template;
    }

}

或

package cn.kooun.core.config;

import java.lang.reflect.Method;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
 * redis配置
 *
 * @author chenWei
 * @date 2019年9月12日 上午11:00:27
 *
 */
@Configuration
@EnableCaching
//自动注入自定义对象到参数列表
@SuppressWarnings("all")
public class RedisConfig  extends CachingConfigurerSupport {

	/**
	 * key的生成策略
	 */
	@Bean
    public KeyGenerator keyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb;
            }

        };
    }
    /**
     * RedisTemplate配置
     * @author chenwei
     * @date 2019年7月2日 上午10:31:44
     * @param factory
     * @return
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
    	RedisTemplate<String, Object> template = new RedisTemplate<>();
        // 配置连接工厂
        template.setConnectionFactory(factory);

        //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值（默认使用JDK的序列化方式）
        Jackson2JsonRedisSerializer jacksonSeial = new Jackson2JsonRedisSerializer(Object.class);

        ObjectMapper om = new ObjectMapper();
        // 指定要序列化的域，field,get和set,以及修饰符范围，ANY是都有包括private和public
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 指定序列化输入的类型，类必须是非final修饰的，final修饰的类，比如String,Integer等会跑出异常
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jacksonSeial.setObjectMapper(om);

        // 值采用json序列化
        template.setValueSerializer(jacksonSeial);
        //使用StringRedisSerializer来序列化和反序列化redis的key值
        template.setKeySerializer(new StringRedisSerializer());

        // 设置hash key 和value序列化模式
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setHashValueSerializer(jacksonSeial);
        template.afterPropertiesSet();

        return template;
    }

}