Spring Boot提供Redis,MongoDB,Neo4j,Elasticsearch,Solr Cassandra,Couchbase和LDAP的自动配置; 如果你要想使用其他nosql技术,需要自己参考“https://projects.spring.io/spring-data/”的文档。
使用redis
Redis是一个缓存,消息代理和功能丰富的键值对存储。Spring Boot为Jedis客户端库和Spring Data Redis提供自动配置和抽象类 。项目需依赖“spring-boot-starter-data-redis”的Starter。使用的时候在bean中注入RedisConnectionFactory,StringRedisTemplate或者RedisTemplate的实例即可,字符串操作推荐使用StringRedisTemplate其他类型推荐使用RedisTemplate。没有配置redis链接地址的情况下默认为localhost:6379。
pom依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
redis配置
import java.lang.reflect.Method;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
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 org.springframework.data.redis.serializer.StringRedisSerializer;
import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport {
@Bean
public KeyGenerator keyGenerator() {
return new KeyGenerator() {
@Override
public Object generate(Object target, Method method, Object... params) {
StringBuilder sb = new StringBuilder();
sb.append(target.getClass().getName());
sb.append(method.getName());
for (Object obj : params) {
sb.append(obj.toString());
}
return sb.toString();
}
};
}
@Bean
public CacheManager cacheManager(@SuppressWarnings("rawtypes") RedisTemplate redisTemplate) {
RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
// 失效时间(秒),默认不失效
cacheManager.setDefaultExpiration(60);
return cacheManager;
}
@Bean
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<Object, Object>();
redisTemplate.setConnectionFactory(factory);
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setValueSerializer(buildJackson2JsonRedisSerializer());
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
@Bean
public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory factory) {
StringRedisTemplate stringRedisTemplate = new StringRedisTemplate(factory);
stringRedisTemplate.setDefaultSerializer(new StringRedisSerializer());
stringRedisTemplate.afterPropertiesSet();
return stringRedisTemplate;
}
private Jackson2JsonRedisSerializer<Object> buildJackson2JsonRedisSerializer() {
Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
return jackson2JsonRedisSerializer;
}
}
注入
@RunWith(SpringJUnit4Cla***unner.class)
@SpringBootTest(classes = Application.class)
public class RedisTemplateTest {
@Resource
private RedisTemplate<String, Object> redisTemplate;
@Resource
private StringRedisTemplate stringRedisTemplate;
......
}