(1)pom.xml引入jar包,以下:html
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency>
(2)修改項目啓動類,增長註解@EnableCaching,開啓緩存功能,以下:java
package springboot; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cache.annotation.EnableCaching; import org.springframework.scheduling.annotation.EnableScheduling; @SpringBootApplication @EnableScheduling @EnableCaching public class SpringbootApplication{ public static void main(String[] args) { SpringApplication.run(SpringbootApplication.class, args); } }
(3)application.properties中配置Redis鏈接信息,以下:redis
# Redis數據庫索引(默認爲0) spring.redis.database=0 # Redis服務器地址 spring.redis.host=172.31.19.222 # Redis服務器鏈接端口 spring.redis.port=6379 # Redis服務器鏈接密碼(默認爲空) spring.redis.password= # 鏈接池最大鏈接數(使用負值表示沒有限制) spring.redis.pool.max-active=8 # 鏈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 # 鏈接池中的最大空閒鏈接 spring.redis.pool.max-idle=8 # 鏈接池中的最小空閒鏈接 spring.redis.pool.min-idle=0 # 鏈接超時時間(毫秒) spring.redis.timeout=0
(4)新建Redis緩存配置類RedisConfig,以下:spring
package springboot.config; import org.springframework.beans.factory.annotation.Value; import org.springframework.cache.CacheManager; import org.springframework.cache.annotation.CachingConfigurerSupport; import org.springframework.cache.annotation.EnableCaching; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.data.redis.cache.RedisCacheManager; import org.springframework.data.redis.connection.RedisConnectionFactory; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.data.redis.core.StringRedisTemplate; import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer; import com.fasterxml.jackson.annotation.JsonAutoDetect; import com.fasterxml.jackson.annotation.PropertyAccessor; import com.fasterxml.jackson.databind.ObjectMapper; /** * Redis緩存配置類 * @author szekinwin * */ @Configuration @EnableCaching public class RedisConfig extends CachingConfigurerSupport{ @Value("${spring.redis.host}") private String host; @Value("${spring.redis.port}") private int port; @Value("${spring.redis.timeout}") private int timeout; //自定義緩存key生成策略 // @Bean // public KeyGenerator keyGenerator() { // return new KeyGenerator(){ // @Override // public Object generate(Object target, java.lang.reflect.Method method, Object... params) { // StringBuffer sb = new StringBuffer(); // sb.append(target.getClass().getName()); // sb.append(method.getName()); // for(Object obj:params){ // sb.append(obj.toString()); // } // return sb.toString(); // } // }; // } //緩存管理器 @Bean public CacheManager cacheManager(@SuppressWarnings("rawtypes") RedisTemplate redisTemplate) { RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate); //設置緩存過時時間 cacheManager.setDefaultExpiration(10000); return cacheManager; } @Bean public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory){ StringRedisTemplate template = new StringRedisTemplate(factory); setSerializer(template);//設置序列化工具 template.afterPropertiesSet(); return template; } private void setSerializer(StringRedisTemplate template){ @SuppressWarnings({ "rawtypes", "unchecked" }) Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class); ObjectMapper om = new ObjectMapper(); om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); jackson2JsonRedisSerializer.setObjectMapper(om); template.setValueSerializer(jackson2JsonRedisSerializer); } }
(5)新建UserMapper,以下:
數據庫
package springboot.dao; import org.apache.ibatis.annotations.Delete; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Mapper; import org.apache.ibatis.annotations.Param; import org.apache.ibatis.annotations.Select; import org.apache.ibatis.annotations.Update; import org.springframework.cache.annotation.CacheConfig; import org.springframework.cache.annotation.CacheEvict; import org.springframework.cache.annotation.CachePut; import org.springframework.cache.annotation.Cacheable; import springboot.domain.User; @Mapper @CacheConfig(cacheNames = "users") public interface UserMapper { @Insert("insert into user(name,age) values(#{name},#{age})") int addUser(@Param("name")String name,@Param("age")String age); @Select("select * from user where id =#{id}") @Cacheable(key ="#p0") User findById(@Param("id") String id); @CachePut(key = "#p0") @Update("update user set name=#{name} where id=#{id}") void updataById(@Param("id")String id,@Param("name")String name); //若是指定爲 true,則方法調用後將當即清空全部緩存 @CacheEvict(key ="#p0",allEntries=true) @Delete("delete from user where id=#{id}") void deleteById(@Param("id")String id); }
@Cacheable將查詢結果緩存到redis中,(key="#p0")指定傳入的第一個參數做爲redis的key。apache
@CachePut,指定key,將更新的結果同步到redis中緩存
@CacheEvict,指定key,刪除緩存數據,allEntries=true,方法調用後將當即清除緩存springboot
(6)service層與controller層跟上一篇整合同樣,啓動redis服務器,redis服務器的安裝與啓動能夠參考以前的博客,地址以下:服務器
http://www.cnblogs.com/gdpuzxs/p/6623171.htmlapp
(7)配置log4j日誌信息,以下:
## LOG4J配置 log4j.rootCategory=DEBUG,stdout ## 控制檯輸出 log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n
(8)驗證redis緩存
首先咱們向user表總插入一條數據,數據庫顯示以下:
如今,咱們查詢一下user表中id=24的數據,觀擦控制檯輸出的信息,以下:
經過控制檯輸出信息咱們能夠知道,此次執行了數據庫查詢,並開啓了Redis緩存查詢結果。接下來咱們再次查詢user表中id=24的數據,觀察控制檯,以下:
經過控制檯輸出信息咱們能夠知道,此次並無執行數據庫查詢,而是從Redis緩存中查詢,並返回查詢結果。咱們查看redis中的信息,以下:
方法finduser方法使用了註解@Cacheable(key="#p0"),即將id做爲redis中的key值。當咱們更新數據的時候,應該使用@CachePut(key="#p0")進行緩存數據的更新,不然將查詢到髒數據。