1.首先導入使用Maven導入jar包
<code><dependency>
<groupid>org.springframework.boot/<groupid>
<artifactid>spring-boot-starter-data-redis/<artifactid>
/<dependency>
<dependency>
<groupid>com.alibaba/<groupid>
<artifactid>fastjson/<artifactid>
<version>1.2.62/<version>
/<dependency>/<code>
2.在application.properties配置信息
<code># Redis數據庫索引(默認為0)
spring.redis.database=0
# Redis服務器地址
spring.redis.host=localhost
# Redis服務器連接端口
spring.redis.port=6379
# Redis服務器連接密碼(默認為空)
spring.redis.password=123456
# 連接池最大連接數(使用負值表示沒有限制)
spring.redis.pool.max-active=200
# 連接池最大阻塞等待時間(使用負值表示沒有限制)
spring.redis.pool.max-wait=-1
# 連接池中的最大空閒連接
spring.redis.pool.max-idle=10
# 連接池中的最小空閒連接
spring.redis.pool.min-idle=0
# 連接超時時間(毫秒)
spring.redis.timeout=1000ms/<code>
3.編寫Redis工具類
<code>@Configuration
@ConditionalOnClass(RedisOperations.class) //系統中有RedisOperations類時
@EnableConfigurationProperties(RedisProperties.class) //啟動RedisProperties這個類
@EnableCaching
// www.1b23.com
public class RedisConfig extends CachingConfigurerSupport {
@Autowired
RedisTemplate redisTemplate;
// 配置緩存管理器
@Bean
public RedisCacheManager cacheManager(RedisConnectionFactory connectionFactory) {
LettuceConnectionFactory jedisConnectionFactory = (LettuceConnectionFactory) redisTemplate.getConnectionFactory();
jedisConnectionFactory.setDatabase(2); //指定dbindex
redisTemplate.setConnectionFactory(jedisConnectionFactory);
jedisConnectionFactory.resetConnection();
RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
.entryTtl(Duration.ofSeconds(60*20)) // 20分鐘緩存失效
// 設置key的序列化方式
// .entryTtl(Duration.ofSeconds(10))
.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
// 設置value的序列化方式
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new FastJsonRedisSerializer(Object.class)))
// 不緩存null值
.disableCachingNullValues();
RedisCacheManager redisCacheManager = RedisCacheManager.builder(connectionFactory)
.cacheDefaults(config)
.transactionAware()
.build();
return redisCacheManager;
}
}/<code>
<code>package com.FireService.config;
import java.nio.charset.Charset;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
public class FastJsonRedisSerializerimplements RedisSerializer /<code>{
public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
private Classclazz;
static {
ParserConfig.getGlobalInstance().addAccept("com.FireService");
}
public FastJsonRedisSerializer(Classclazz) {
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);
}
}
4.SpringBoot有關緩存的幾個註解
@Cacheable:查詢可選屬性:cacheNames/value:指定緩存組件的名字;key:緩存數據使用的key,可以用來指定。默認即使用方法參數的值keyGenerator:key的生成器,可以自己指定key的生成器的組件id
<code>//自定義配置類配置keyGenerator
@Configuration
public class MyCacheConfig {
@Bean("myKeyGenerator")
public KeyGenerator keyGenerator(){
return new KeyGenerator() {
@Override
public Object generate(Object target, Method method, Object... params) {
return method.getName()+"["+ Arrays.asList(params).toString() +"]";
}
};
}
}/<code>
cacheManager:指定緩存管理器;或者cacheResolver獲取指定解析器
condition:指定符合條件的情況下才緩存;如condition="#id>0"
unless:否定緩存,當unless指定的條件為true,方法的返回值不會被緩存,可以獲取到結果進行判斷;如unless="#result==null";
sync:是否使用異步模式
例如:
<code>@Cacheable(value = "RedisInfo", key = "#root.methodName+'['+#account+']'")
@ResponseBody
@RequestMapping("/RedisTest")
public Result findUserOrder(String account) throws Exception{
if(account!=null) {
List/<code>
運行項目查看結果
1.第一次訪問
查看Druid連接信息
轉自:https://www.linuxprobe.com/springbootredis.html
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