Bootstrap

SpringBoot2.0整合Redis

首先引入POM依赖

		<!--nosql数据库-->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-redis</artifactId>
		</dependency>

		<!--spring2.0集成redis所需common-pool2-->
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-pool2</artifactId>
			<version>2.4.2</version>
		</dependency>

		<!--fastjson-->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.8</version>
		</dependency> 

加入配置

这里我用的是YML的格式

spring: 
    redis:
      #数据库索引
      database: 0
      host: 127.0.0.1
      port: 6379
      password:
      jedis:
        pool:
          #最大连接数
          max-active: 8
          #最大阻塞等待时间(负数表示没限制)
          max-wait: -1
          #最大空闲
          max-idle: 8
          #最小空闲
          min-idle: 0
      #连接超时时间
      timeout: 10000

正常情况下这样就可以直接使用了

@SpringBootTest
@RunWith(SpringRunner.class)
@Component
public class TestRedis {

    @Autowired
    private RedisTemplate redisTemplate;
    
    @Test
    public void set(){
        redisTemplate.opsForValue().set("test:set","testValue1");
    }
}

完了?

没错,完了!

可能你就好奇了,不对呀,刚刚还引入了fastjson啊,这就是文章的重点了,然我们跑一下刚刚的程序,看一下我们存的键值对

虽然存取是没什么问题,但是这看着让人很蓝受,让我们翻阅Redis的源码发现RedisTemplate中有这么一段

这是由于默认序列化方式导致的,竟然发现了问题,现在就解决它

首先自定义一个通用序列化方式的类

public class FastJsonRedisSerializer<T> implements RedisSerializer<T> {

    public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");

    private Class<T> clazz;

    public FastJsonRedisSerializer(Class<T> clazz) {
        super();
        this.clazz = clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException {
        if (null == t) {
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException {
        if (null == bytes || bytes.length <= 0) {
            return null;
        }
        String str = new String(bytes, DEFAULT_CHARSET);
        return (T) JSON.parseObject(str, clazz);
    }

}

然后我们找源码

org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration

毫无疑问,它就是Redis的核心配置了,新建一个类RedisConfig把RedisAutoConfiguration中的内容全部复制过来,稍加修改

@Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
public class RedisConfig {

    @Bean
    @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<Object, Object> redisTemplate(
            RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();

        //使用fastjson序列化
        FastJsonRedisSerializer fastJsonRedisSerializer = new FastJsonRedisSerializer(Object.class);
        // value值的序列化采用fastJsonRedisSerializer
        template.setValueSerializer(fastJsonRedisSerializer);
        template.setHashValueSerializer(fastJsonRedisSerializer);
        // key的序列化采用StringRedisSerializer
        template.setKeySerializer(new StringRedisSerializer());
        template.setHashKeySerializer(new StringRedisSerializer());

        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

    @Bean
    @ConditionalOnMissingBean(StringRedisTemplate.class)
    public StringRedisTemplate stringRedisTemplate(
            RedisConnectionFactory redisConnectionFactory) {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

}

如上代码所见,我们修改了key和value的序列化规则,key就用Redis本身提供的序列化方式,value就用我们刚刚定义的fastjson序列化方式。

至此完毕



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