Redis-07-SpringBoot整合Redis
阿新 • • 發佈：2020-09-19
1、自動配置類，RedisAutoConfiguration
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
@Import({ LettuceConnectionConfiguration.class, JedisConnectionConfiguration.class })
public class RedisAutoConfiguration {
@Bean
@ConditionalOnMissingBean(name = "redisTemplate")
throws UnknownHostException {
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(redisConnectionFactory);
return template;
@Bean
@ConditionalOnMissingBean
public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory)
throws UnknownHostException {
StringRedisTemplate template = new StringRedisTemplate();
template.setConnectionFactory(redisConnectionFactory);
}
}
2、自動配置檔案，RedisProperties
@ConfigurationProperties(prefix = "spring.redis")
public class RedisProperties {
/**
* 連線Redis通常使用0號資料庫
*/
private int database = 0;
private String url;
private String host = "localhost";
private String password;
private int port = 6379;
//安全連線
private boolean ssl;
//連線超時
private Duration timeout;
private String clientName;
private Sentinel sentinel;
private Cluster cluster;
private final Jedis jedis = new Jedis();
private final Lettuce lettuce = new Lettuce();
//......
}
3、匯入依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
4、配置連線
spring:
redis:
host: 127.0.0.1
port: 6379
5、測試
@Test
public void test(){
redisTemplate.opsForValue().set("key","value");
System.out.println(redisTemplate.opsForValue().get("key"));
}
6、自定義RedisTemplate
-
測試程式碼
@SpringBootTest
class DemotestApplicationTests {
@Autowired
@Qualifier("redisTemplate")
private RedisTemplate redisTemplate;
@Test
void contextLoads() throws JsonProcessingException {
User user = new User("洪夢霞", 22);
redisTemplate.opsForValue().set("user",user);
System.out.println(redisTemplate.opsForValue().get("user"));
}
} -
直接把物件放到Redis中會物件沒有序列化的錯誤，所以所有的物件都需要實現序列化
-
預設的序列化為：JdkSerializationRedisSerializer，會把物件轉義
-
可在自定義RedisTemplate中實現其他的序列化方式
@Configuration
public class RedisConfig {
@Bean
@SuppressWarnings("all")
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
template.setConnectionFactory(factory);
//jackson序列化方式
//使用json解析物件
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
//使用ObjectMapper轉義
ObjectMapper om = new ObjectMapper();
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
//String序列化方式
StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
// key採用String的序列化方式
template.setKeySerializer(stringRedisSerializer);
// hash的key也採用String的序列化方式
template.setHashKeySerializer(stringRedisSerializer);
// value序列化方式採用jackson
template.setValueSerializer(jackson2JsonRedisSerializer);
// hash的value序列化方式採用jackson
template.setHashValueSerializer(jackson2JsonRedisSerializer);
template.afterPropertiesSet();
return template;
}
}
7、Redis工具類，RedisUtils
@Component
public final class RedisUtil {
@Autowired
private RedisTemplate<String, Object> redisTemplate;
// =============================common============================
/**
* 指定快取失效時間
* @param key 鍵
* @param time 時間(秒)
*/
public boolean expire(String key, long time) {
try {
if (time > 0) {
redisTemplate.expire(key, time, TimeUnit.SECONDS);
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 根據key 獲取過期時間
* @param key 鍵 不能為null
* @return 時間(秒) 返回0代表為永久有效
*/
public long getExpire(String key) {
return redisTemplate.getExpire(key, TimeUnit.SECONDS);
}
/**
* 判斷key是否存在
* @param key 鍵
* @return true 存在 false不存在
*/
public boolean hasKey(String key) {
try {
return redisTemplate.hasKey(key);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 刪除快取
* @param key 可以傳一個值 或多個
*/
@SuppressWarnings("unchecked")
public void del(String... key) {
if (key != null && key.length > 0) {
if (key.length == 1) {
redisTemplate.delete(key[0]);
} else {
redisTemplate.delete(CollectionUtils.arrayToList(key));
}
}
}
// ============================String=============================
/**
* 普通快取獲取
* @param key 鍵
* @return 值
*/
public Object get(String key) {
return key == null ? null : redisTemplate.opsForValue().get(key);
}
/**
* 普通快取放入
* @param key 鍵
* @param value 值
* @return true成功 false失敗
*/
public boolean set(