SpringBoot整合连接Redis集群

第一步，新建项目maven项目，添加依赖

（1）本文所采用的SpringBoot的版本如下

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.2.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

（2）加入Redis相关依赖

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

第二步，application.yml加入redis相关配置

spring:
  application:
    name: redis-cluster
  redis:
    cluster:
      nodes: 192.168.0.102:6379,192.168.0.103:6379,192.168.0.105:6379
      max-redirects: 6
redis:
  timeout: 10000 #客户端超时时间单位是毫秒 默认是2000
  maxIdle: 300 #最大空闲数
  maxTotal: 1000 #控制一个pool可分配多少个jedis实例,用来替换上面的redis.maxActive,如果是jedis 2.4以后用该属性
  maxWaitMillis: 1000 #最大建立连接等待时间。如果超过此时间将接到异常。设为-1表示无限制。
  minEvictableIdleTimeMillis: 300000 #连接的最小空闲时间 默认1800000毫秒(30分钟)
  numTestsPerEvictionRun: 1024 #每次释放连接的最大数目,默认3
  timeBetweenEvictionRunsMillis: 30000 #逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1
  testOnBorrow: true #是否在从池中取出连接前进行检验,如果检验失败,则从池中去除连接并尝试取出另一个
  testWhileIdle: true #在空闲时检查有效性, 默认false
  password: 123456 #密码
server:
  port: 8080

第三步，编写配置类

package com.qxj.redis;

import java.util.HashSet;
import java.util.Set;

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.RedisClusterConfiguration;
import org.springframework.data.redis.connection.RedisNode;
import org.springframework.data.redis.connection.RedisPassword;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
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;

import redis.clients.jedis.JedisPoolConfig;

@Configuration
public class RedisClusterConfig {

    @Value("${spring.redis.cluster.nodes}")
    private String clusterNodes;
    @Value("${spring.redis.cluster.max-redirects}")
    private int maxRedirects;
    @Value("${redis.password}")
    private String password;
    @Value("${redis.timeout}")
    private int timeout;
    @Value("${redis.maxIdle}")
    private int maxIdle;
    @Value("${redis.maxTotal}")
    private int maxTotal;
    @Value("${redis.maxWaitMillis}")
    private int maxWaitMillis;
    @Value("${redis.minEvictableIdleTimeMillis}")
    private int minEvictableIdleTimeMillis;
    @Value("${redis.numTestsPerEvictionRun}")
    private int numTestsPerEvictionRun;
    @Value("${redis.timeBetweenEvictionRunsMillis}")
    private int timeBetweenEvictionRunsMillis;
    @Value("${redis.testOnBorrow}")
    private boolean testOnBorrow;
    @Value("${redis.testWhileIdle}")
    private boolean testWhileIdle;

    /**
     * Redis连接池的配置
     * 
     * @return JedisPoolConfig
     */
    @Bean
    public JedisPoolConfig getJedisPoolConfig() {
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        // 最大空闲数
        jedisPoolConfig.setMaxIdle(maxIdle);
        // 连接池的最大数据库连接数
        jedisPoolConfig.setMaxTotal(maxTotal);
        // 最大建立连接等待时间
        jedisPoolConfig.setMaxWaitMillis(maxWaitMillis);
        // 逐出连接的最小空闲时间 默认1800000毫秒(30分钟)
        jedisPoolConfig.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        // 每次逐出检查时 逐出的最大数目 如果为负数就是 : 1/abs(n), 默认3
        jedisPoolConfig.setNumTestsPerEvictionRun(numTestsPerEvictionRun);
        // 逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1
        jedisPoolConfig.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        // 是否在从池中取出连接前进行检验,如果检验失败,则从池中去除连接并尝试取出另一个
        jedisPoolConfig.setTestOnBorrow(testOnBorrow);
        // 在空闲时检查有效性, 默认false
        jedisPoolConfig.setTestWhileIdle(testWhileIdle);
        return jedisPoolConfig;
    }

    /**
     * Redis集群的配置
     * 
     * @return RedisClusterConfiguration
     */
    @Bean
    public RedisClusterConfiguration redisClusterConfiguration() {
        RedisClusterConfiguration redisClusterConfiguration = new RedisClusterConfiguration();
        // Set<RedisNode> clusterNodes
        String[] serverArray = clusterNodes.split(",");
        Set<RedisNode> nodes = new HashSet<RedisNode>();
        for (String ipPort : serverArray) {
            String[] ipAndPort = ipPort.split(":");
            nodes.add(new RedisNode(ipAndPort[0].trim(), Integer.valueOf(ipAndPort[1])));
        }
        redisClusterConfiguration.setClusterNodes(nodes);
        redisClusterConfiguration.setMaxRedirects(maxRedirects);
        redisClusterConfiguration.setPassword(RedisPassword.of(password));
        return redisClusterConfiguration;
    }

    /**
     * redis连接工厂类
     * 
     * @return JedisConnectionFactory
     */
    @Bean
    public JedisConnectionFactory jedisConnectionFactory() {
        // 集群模式
        JedisConnectionFactory factory = new JedisConnectionFactory(redisClusterConfiguration(), getJedisPoolConfig());
        return factory;
    }

    /**
     * 实例化 RedisTemplate 对象
     * 
     * @return RedisTemplate<String, Object>
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate() {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        // Template初始化
        initDomainRedisTemplate(redisTemplate);
        return redisTemplate;
    }

    /**
     * 设置数据存入 redis 的序列化方式 使用默认的序列化会导致key乱码
     */
    private void initDomainRedisTemplate(RedisTemplate<String, Object> redisTemplate) {
        // 开启redis数据库事务的支持
        redisTemplate.setEnableTransactionSupport(true);
        redisTemplate.setConnectionFactory(jedisConnectionFactory());

        // 如果不配置Serializer，那么存储的时候缺省使用String，如果用User类型存储，那么会提示错误User can't cast to
        // String！
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringRedisSerializer);
        // hash的key也采用String的序列化方式
        redisTemplate.setHashKeySerializer(stringRedisSerializer);

        // jackson序列化对象设置
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(
                Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        // value序列化方式采用jackson
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        // hash的value序列化方式采用jackson
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

        redisTemplate.afterPropertiesSet();
    }
}

第四步，编写Controller测试类

package com.qxj.application;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController {

    @Autowired
    private RedisTemplate<String, Object> template;

    @RequestMapping("/test")
    public String test() {
        template.opsForValue().set("demo", "hello world! 你好，世界");
        String str = (String) template.opsForValue().get("demo");
        return str;
    }

}

参考文献：https://blog.csdn.net/WYA1993/article/details/88046628

https://www.cnblogs.com/wps54213/p/12608777.html

在springboot使用搭建好的redis集群----lettuce方式

添加redis和连接池依赖

   <!--redis连接池 start-->
       <dependency>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-pool2</artifactId>
       </dependency>
       <!--redis连接池 end-->

       <!--redis start-->
       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-data-redis</artifactId>
           <version>2.2.6.RELEASE</version>
       </dependency>
       <!--redis end-->

在配置文件中配置连接池和sentinel

ip: 39.97.234.52
spring:
  redis:
    lettuce:
      pool:
        max-active: 10
        max-idle: 8
        max-wait: -1ms
        min-idle: 0
    sentinel:
      master: mymaster
      nodes: ${ip}:26379,${ip}:26380,${ip}:26381
    password: test@dbuser2018

添加redis配置类,修改springboot默认的redis序列化方式

@Configuration
public class RedisConfig {
    /**
     * 把任何数据保存到redis时，都需要进行序列化，默认使用JdkSerializationRedisSerializer进行序列化。
     * 默认的序列化会给所有的key,value的原始字符前，都加了一串字符（例如：\xAC\xED\x00\），不具备可读性
     * 所以需要配置jackson序列化方式
     */
    @Bean
    public RedisTemplate<String,Object> redisTemplate(LettuceConnectionFactory factory){
        RedisTemplate<String,Object> template=new RedisTemplate<>();
        template.setConnectionFactory(factory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        //key采用String的序列化方式
        template.setKeySerializer(stringRedisSerializer);
        //value采用jackson序列化方式
        template.setValueSerializer(jackson2JsonRedisSerializer);
        //hash的key采用String的序列化方式
        template.setHashKeySerializer(stringRedisSerializer);
        //hash的value采用String的序列化方式
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }
}

创建redis服务

    @Service
    public class RedisServiceImpl implements RedisService {

    @Autowired
    private RedisTemplate redisTemplate;

    @Override
    public boolean put(String key, Object value, long seconds) throws JsonProcessingException {
        redisTemplate.opsForValue().set(key, value, seconds, TimeUnit.SECONDS);
        return true;
    }

    @Override
    public <T> T get(String key, Class<T> clazz) throws IOException {
        Object o = redisTemplate.opsForValue().get(key);
        if (o != null) {
            String json = String.valueOf(o);
            T t = JsonUtil.stringToObject(json, clazz);
            return t;
        }
        return null;
    }
    }

创建redisController测试redis服务

    @RestController
    public class RedisController {

        @Autowired
        private RedisService redisService;

        @PostMapping(value = "put")
        public String put(String key,String value,long seconds){

            redisService.put(key,value,seconds);
            return "ok";
        }

        @GetMapping(value = "get")
        public Object get(String key){

            Object o=redisService.get(key);
            if(o!=null){
                return String.valueOf(o);
            }
            return "not_ok";
        }
    }