(十二)SpringBoot2.0整合Redis缓存技术

一. 项目整合

1. pom文件依赖

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-redis</artifactId>
		</dependency>
		<!-- 高版本redis的lettuce需要commons-pool2 -->
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-pool2</artifactId>
		</dependency>

2. redis配置类

/**
 * @author: hejr
 * @desc: Redis配置类
 * @date: 2019/4/9 16:26
 */
@Configuration
public class RedisConfig {


    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // 使用Jackson2JsonRedisSerialize 替换默认的jdkSerializeable序列化
        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);
        // 设置value的序列化规则和 key的序列化规则
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
}

3. application.xml配置

server:
  port: 8096

# Redis配置
spring:
  redis:
    database: 0
    host: 127.0.0.1
    jedis:
      pool:
        #最大连接数据库连接数,设 0 为没有限制
        max-active: 8
        #最大等待连接中的数量,设 0 为没有限制
        max-idle: 8
        #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。
        max-wait: -1ms
        #最小等待连接中的数量,设 0 为没有限制
        min-idle: 0
    lettuce:
      pool:
        max-active: 8
        max-idle: 8
        max-wait: -1ms
        min-idle: 0
      shutdown-timeout: 100ms
    password: ''
    port: 6379

4. 新建redisUtil工具类

/**
 * @author: hejr
 * @desc: Redis工具类
 * @date: 2019/4/9 16:30
 */

@Component
public class RedisUtil {

    @Autowired
    private RedisTemplate<Object, Object> redisTemplate;

    /**
     * 添加字符串KEY
     * @param key      字符串KEY
     * @param value    值 可以为对象
     * @param expire   过期时间
     * @param timeUnit TimeUnit中定义的时间单位
     */
    public void addKey(String key, Object value, long expire, TimeUnit timeUnit) {
        this.redisTemplate.opsForValue().set(key, value, expire, timeUnit);
    }


    /**
     * 根据KEY获取VALUE
     *
     * @param key
     * @return value
     */
    public Object getValue(String key) {
        return this.redisTemplate.opsForValue().get(key);
    }

}

二. 演示

1. 单元测试类

/**
 * @author: hejr
 * @desc:
 * @date: 2019/4/9 16:35
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class RedisUtilTest {

    @Autowired
    private RedisUtil redisUtil;

    @Test
    public void addKey() {
        this.redisUtil.addKey("userName", "何金荣", 60, TimeUnit.SECONDS);
        System.out.println("添加成功");
    }

    @Test
    public void getKey() {
        String value1 = (String) this.redisUtil.getValue("userName");
        System.out.println("获取到key为userName的值：" + value1);
    }
}

三. 源码下载

https://gitee.com/hejr.cn.com/SpringBoot2.0_2019/tree/master/springboot2_007

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