SpringBoot快速集成Redis

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- 使用lettuce做redis的连接池需要额外引入这个包-->
<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
</dependency>

spring:
  redis:
    # 地址
    host: 192.168.56.102
    # 端口号
    port: 3306
    # 密码
    password: 123456
    # 超时时间，单位毫秒
    timeout: 3000
    # 数据库编号
    database: 0
    # 配置lettuce
    lettuce:
      pool:
        # 连接池中的最小空闲连接
        min-idle: 1
        # 连接池中的最大空闲连接
        max-idle: 6
        # 连接池最大连接数（使用负值表示没有限制,不要配置过大，否则可能会影响redis的性能）
        max-active: 10
        # 连接池最大阻塞等待时间（使用负值表示没有限制）；单位毫秒
        max-wait: 1000
      #关闭超时时间；单位毫秒
      shutdown-timeout: 200

@Autowired
private StringRedisTemplate stringRedisTemplate;


/**
 * 增删查改示例1
 */
@Override
public String crud1() {
    ValueOperations<String, String> operations = this.stringRedisTemplate.opsForValue();
    // 获取数据
    String val = operations.get("student:1");
    if(null==val){
        log.info("缓存中数据不存在");
        Student student = Student.create();
        val = JSON.toJSONString(student);
        // 添加数据
        operations.set("student:1", val);


        Student student2 = Student.create();
        student2.setId(2L);
        operations.set("student:2", JSON.toJSONString(student2));
        this.stringRedisTemplate.opsForList().leftPush("student_list", JSON.toJSONString(student));
        this.stringRedisTemplate.opsForList().leftPush("student_list", JSON.toJSONString(student2));


    }else {
        // 删除数据
        this.stringRedisTemplate.delete("student:2");
        log.info("删除缓存");
    }
    log.info(val);


    // 获取列表数据
    List<String> list = this.stringRedisTemplate.opsForList().range("student_list", 0, 3);
    log.info(JSON.toJSONString(list));
    return val;
}

@Configuration
public class RedisConfig<K, V> extends CachingConfigurerSupport {


    /**
     * 自定义缓存注解key的生成策略。默认的生成策略是看不懂的(乱码内容)
     * 通过Spring 的依赖注入特性进行自定义的配置注入并且此类是一个配置类可以更多程度的自定义配置
     * 这里是生成的key是：类全名.方法名 方法参数（的md5加密）
     */
    @Bean
    @Override
    public KeyGenerator keyGenerator() {
        return (target, method, params) -> {
            StringBuilder prefix = new StringBuilder();
            prefix.append(target.getClass().getName());
            prefix.append(".").append(method.getName());
            StringBuilder sb = new StringBuilder();
            for (Object obj : params) {
                sb.append(obj.toString());
            }
            return prefix.append(DigestUtils.md5DigestAsHex(sb.toString().getBytes()));
        };
    }


    /**
     * 缓存配置管理器
     */
    @Bean
    public CacheManager cacheManager(LettuceConnectionFactory factory) {
        //以锁写入的方式创建RedisCacheWriter对象
        RedisCacheWriter writer = RedisCacheWriter.lockingRedisCacheWriter(factory);
        //设置缓存注解的缓存时间，缓存1小时
        Duration duration = Duration.ofSeconds(3600L);
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig().entryTtl(duration);
        return new RedisCacheManager(writer, redisCacheConfiguration);
    }


    /**
     * 修改redisTemplate的序列化方式
     *
     * @param factory LettuceConnectionFactory
     */
    @Bean(name = "redisTemplate")
    public RedisTemplate<K, V> redisTemplate(LettuceConnectionFactory factory) {
        //创建RedisTemplate对象
        RedisTemplate<K, V> template = new RedisTemplate<K, V>();
        template.setConnectionFactory(factory);
        //设置key的序列化方式
        template.setKeySerializer(keySerializer());
        template.setHashKeySerializer(keySerializer());


        //设置RedisTemplate的Value序列化方式Jackson2JsonRedisSerializer；默认是JdkSerializationRedisSerializer
        template.setValueSerializer(valueSerializer());
        template.setHashValueSerializer(valueSerializer());


        template.afterPropertiesSet();
        return template;
    }


    private RedisSerializer<String> keySerializer() {
        return new StringRedisSerializer();
    }


    private RedisSerializer<Object> valueSerializer() {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(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等会抛出异常
        om.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL);
        //解决时间序列化问题
        om.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        om.registerModule(new JavaTimeModule());


        jackson2JsonRedisSerializer.setObjectMapper(om);
        return jackson2JsonRedisSerializer;
    }


}

@Autowired
private RedisTemplate<String, Student> redisTemplate;


@Override
public Student crud2() {
    ValueOperations<String, Student> operations = this.redisTemplate.opsForValue();
    // 获取数据
    Student val = operations.get("student2:1");
    if(null==val){
        log.info("缓存中数据不存在");
        val = Student.create();
        // 添加数据
        operations.set("student2:1", val);
        
        Student student2 = Student.create();
        student2.setId(2L);
        operations.set("student2:2", student2);
        this.redisTemplate.opsForList().leftPush("student_list2", val);
        this.redisTemplate.opsForList().leftPush("student_list2", student2);
    }else {
        // 删除数据
        this.redisTemplate.delete("student2:2");
        log.info("删除缓存");
    }
    log.info(JSON.toJSONString(val));
    
    // 获取列表数据
    List<Student> list = this.redisTemplate.opsForList().range("student_list2", 0, 3);
    log.info(JSON.toJSONString(list));
    return val;
}