compile('org.springframework.boot:spring-boot-starter-data-redis')# application.yml配置
spring: # redis redis: database: 0 host: localhost port: 6379 password: 12345 jedis: pool: max-active: 10 min-idle: 0 max-idle: 8 timeout: 10000# redis配置类 new RedisConfiguration
package com.futao.springmvcdemo.foundation.configurationimport org.springframework.cache.CacheManagerimport org.springframework.cache.annotation.CachingConfigurerSupportimport org.springframework.cache.annotation.EnableCachingimport org.springframework.cache.interceptor.KeyGeneratorimport org.springframework.context.annotation.Beanimport org.springframework.context.annotation.Configurationimport org.springframework.data.redis.cache.RedisCacheManagerimport org.springframework.data.redis.connection.RedisConnectionFactoryimport org.springframework.data.redis.core.RedisTemplateimport org.springframework.data.redis.serializer.StringRedisSerializerimport javax.annotation.Resource@Configuration@EnableCachingopen class RedisConfiguration : CachingConfigurerSupport() { @Bean override fun keyGenerator(): KeyGenerator { return KeyGenerator { target, method, params -> val builder = StringBuilder() builder.append("${target.javaClass.simpleName}-") .append("${method.name}-") for (param in params) { builder.append("$param-") } builder.toString().toLowerCase() } } @Bean open fun redisTemplate(factory: RedisConnectionFactory): RedisTemplate# 自定义redis中数据的序列化与反序列化 new FastJsonRedisSerializer{ val redisTemplate = RedisTemplate () val fastJsonRedisSerializer = FastJsonRedisSerializer(Any::class.java) val stringRedisSerializer = StringRedisSerializer() return redisTemplate.apply { defaultSerializer = fastJsonRedisSerializer keySerializer = stringRedisSerializer hashKeySerializer = stringRedisSerializer valueSerializer = fastJsonRedisSerializer hashValueSerializer = fastJsonRedisSerializer connectionFactory = factory } } @Resource lateinit var redisConnectionFactory: RedisConnectionFactory override fun cacheManager(): CacheManager { return RedisCacheManager.create(redisConnectionFactory) } }
package com.futao.springmvcdemo.foundation.configurationimport com.alibaba.fastjson.JSONimport com.alibaba.fastjson.serializer.SerializerFeatureimport com.futao.springmvcdemo.model.system.SystemConfigimport org.springframework.data.redis.serializer.RedisSerializerimport java.nio.charset.Charsetclass FastJsonRedisSerializer# 启动类(java: Class ) : RedisSerializer { private val clazz: Class ? = null override fun serialize(t: T?): ByteArray? { return if (t == null) { null } else { JSON.toJSonString(t, SerializerFeature.WriteClassName).toByteArray(Charset.forName(SystemConfig.UTF8_ENCODE)) } } override fun deserialize(bytes: ByteArray?): T? { return if (bytes == null || bytes.isEmpty()) { null } else { val string = String(bytes, Charset.forName(SystemConfig.UTF8_ENCODE)) JSON.parseObject(string, clazz) as T } } }
package com.futao.springmvcdemo;import com.alibaba.fastjson.parser.ParserConfig;import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.web.servlet.ServletComponentScan;import org.springframework.cache.annotation.EnableCaching;@SpringBootApplication@ServletComponentScan@MapperScan("com.futao.springmvcdemo.dao")@EnableCaching//@EnableAspectJAutoProxypublic class SpringmvcdemoApplication { public static void main(String[] args) { SpringApplication.run(SpringmvcdemoApplication.class, args); ParserConfig.getGlobalInstance().setAutoTypeSupport(true); } }# 使用
1. 基于注解的方式
@Cacheable() redis中的key会根据我们的keyGenerator方法来生成,比如对应下面这个例子,如果曾经以mobile,pageNum,pageSize,orderBy的值执行过list这个方法的话,方法返回的值会存在redis缓存中,下次如果仍然以相同的mobile,pageNum,pageSize,orderBy的值来调用这个方法的话会直接返回缓存中的值
@Servicepublic class UserServiceImpl implements UserService { @Override @Cacheable(value = "user") public Listlist(String mobile, int pageNum, int pageSize, String orderBy) { PageResultUtils pageResultUtils = new PageResultUtils<>(); final val sql = pageResultUtils.createCriteria(User.class.getSimpleName()) .orderBy(orderBy) .page(pageNum, pageSize) .getSql(); return userDao.list(sql); } }
测试
第一次请求(可以看到执行了sql,数据是从数据库中读取的)
第一次请求
通过redis desktop manager查看redis缓存中已经存储了我们刚才list返回的值
image.png
后续请求(未执行sql,直接读取的是redis中的值)
后续请求
2. 通过java代码手动set与get
package com.futao.springmvcdemo.controllerimport com.futao.springmvcdemo.model.entity.Userimport org.springframework.data.redis.core.RedisTemplateimport org.springframework.http.MediaTypeimport org.springframework.web.bind.annotation.GetMappingimport org.springframework.web.bind.annotation.RequestMappingimport org.springframework.web.bind.annotation.RequestParamimport org.springframework.web.bind.annotation.RestControllerimport javax.annotation.Resource@RestController@RequestMapping(path = ["kotlinTest"], produces = [MediaType.APPLICATION_JSON_UTF8_VALUE])open class KotlinTestController { @Resource private lateinit var redisTemplate: RedisTemplate @GetMapping(path = ["setCache"]) open fun cache( @RequestParam("name") name: String, @RequestParam("age") age: Int ): User { val user = User().apply { username = name setAge(age.toString()) } redisTemplate.opsForValue().set(name, user) return user } @GetMapping(path = ["getCache"]) open fun getCache( @RequestParam("name") name: String ): User? { return if (redisTemplate.opsForValue().get(name) != null) { redisTemplate.opsForValue().get(name) as User } else null } }
测试结果
请求(序列化)
image.png
作者:FutaoSmile丶
链接:https://www.jianshu.com/p/38b733f7f5f3