Spring Boot Integrated Redis

Own development environment needs to install Redis service, Baidu a lot, the following main description Springboot integrated Redis explained

My version java8 + redis3.0 + springboot 1.5.9. Spring Redis integrates the Jedis

The bytes is stored in Redis

1 Spring boot already supports integrated Redis, and only adds dependencies in MVN. The POM configuration fragment is as follows

<parent>    <groupId>org.springframework.boot</groupId>    <artifactId> spring-boot-starter-parent</artifactid>    <version>1.5.  9. release</version>  </parent> ... <!--adding Redis cache Support-    <dependency>      <groupId>org.springframework.boot</groupId>      <artifactId>spring-boot-starter-data-redis</artifactId>    </dependency>

1.2 Configuring Redis, modifying configuration Files Application.properties

# # Redis Configuration # # Redis Database index (default is 0) spring.redis.database=0# # Redis server address Spring.redis.host=127.0.0.1# # Redis Server connection Port Spring.redis.port=6379# # Redis Server connection password (default is empty) Spring.redis.password=# # Connection pool Maximum number of connections (use negative values to indicate no limit) Spring.redis.pool.max-active=8# # Connection pool maximum blocking wait time (using negative values to indicate no limit) Spring.redis.pool.max-wait=-1# # Maximum idle connection in the connection pool Spring.redis.pool.max-idle=8# # The minimum idle connection in the connection pool spring.redis.pool.min-idle=0# # Connection time-out (ms) Spring.redis.timeout=0

2 connecting Redis requires Redisconnection and redisconnectionfactory,

Redisconnection is created by Redisconnectionfactory.

Redisconnection provides lower-level data operations ( byte arrays)

2.1 Creating a Configuration Class Redisconfig

@Configuration  Public class redisconfig {    @Autowired    private  redisconnectionfactory redisconnectionfactory;    } 

3 redistemplate

Redistemplate is the core class of the Redis module and is a rich feature of the high abstraction of redis operations. His focus is on serialization and connection management. He is thread safe and provides the following interface for operation

Hashoperationshyperloglogoperationslistoperationssetoperationsvalueoperationszsetoperations

Spring also provides a stringredistemplate to facilitate the processing of strings. Objects are often encountered in Java, and you can use Jackson for object-string conversions. can provide a tool class.

Jsonutil

 Public classJsonutil {Private StaticObjectmapper Objectmapper =NewObjectmapper ();  Public StaticString convertobj2string (ObjectObject) {String s=NULL; Try{s= Objectmapper.writevalueasstring (Object); } Catch(jsonprocessingexception e) {e.printstacktrace (); }        returns; }     Public Static<T> T Convertstring2obj (String s, class<t>clazz) {T T=NULL; Try{T=Objectmapper.readvalue (S, clazz); } Catch(IOException e) {e.printstacktrace (); }        returnT; }}

At this point, the Redis configuration is as follows

@Configuration  Public class redisconfig {    @Autowired    private  redisconnectionfactory redisconnectionfactory;    @Bean    public redistemplate<string, string> redistemplate () {         New  stringredistemplate (redisconnectionfactory);         return redistemplate;}    }

Description: By default, the Bean name and method name are the same, and you can use the Name property to specify. A bean with ID redistemplate is registered in the IOC container above.

4 using Redistemplate for additional pruning and checking

@Service Public classRedisservice {@AutowiredPrivatestringredistemplate redistemplate; /** * How many seconds a week*/    Private StaticFinalLongWeek_seconds =7* -* -* -; /** * Store key,value in Redis database with default setting expiration of one week * * @param key * @param value*/     Public void Set(String key, Object value) {Redistemplate.opsforvalue ().Set(Key, jsonutil.convertobj2string (value), Week_seconds, timeunit.seconds); }    /** * Store the Key,value in the Redis database, set the expiration unit in seconds * * @param key * @param value * @param expiretime */     Public void Set(String key, Object value,Longexpiretime) {Redistemplate.opsforvalue ().Set(Key, jsonutil.convertobj2string (value), Expiretime, timeunit.seconds); }    /** * determine if key is in the Redis database * * @param key * @return*/     PublicBoolean exists (final String key) {returnRedistemplate.haskey (key); }    /** * Get the object corresponding to key * @param key * @param clazz target Object type * @param <T> * @return*/     Public<T> TGet(String key, class<t>clazz) {String s=Get(key); if(s = =NULL) {            return NULL; }        returnJsonutil.convertstring2obj (S, clazz); }    /** * Get the string corresponding to key * @param key * @return*/     PublicStringGet(String key) {returnRedistemplate.opsforvalue ().Get(key); }    /** * Delete key corresponding to value * @param key*/     Public voidDelete (String key) {redistemplate.delete (key); }}

Spring Boot Integrated Redis