02 Springboot整合redis
阿新 • • 發佈:2022-05-12
02 Springboot整合redis
專案的搭建
建立springboot專案哦
1 加入依賴
<!-- spring boot redis快取引入 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <!-- 快取連線池--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> </dependency> <!-- redis 儲存 json序列化 --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> </dependency> <dependency> <groupId>com.fasterxml.jackson.datatype</groupId> <artifactId>jackson-datatype-jsr310</artifactId> </dependency> <!-- 生成getset方法 --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency>
2 實體類
/**
* @author : look-word
* @date : 2022-05-12 15:55
**/
@Component
@Data
public class Student implements Serializable {
@Value("1")
private Long id;
@Value("李四")
private String name;
@Value("18")
private String age;
}
3 配置檔案
application.yaml
server: port: 8110 # 服務埠 spring: #spring: redis: host: # 主機地址 port: 7003 # 埠 database: 0 password: 317311 # 預設為空 timeout: 3000ms #最大等待時間,超時則丟擲異常,否則請求一直等待 lettuce: pool: max-active: 20 #最大連線數,負值表示沒有限制,預設8 max-wait: -1 #最大阻塞等待時間,負值表示沒限制,預設-1 max-idle: 8 #最大空閒連線,預設8 min-idle: 0 #最小空閒連線,預設0
測試
@SpringBootTest public class RedisTest { /** * 注入我們交給spring管理的物件 * */ @Resource private Student student; /** * 注入redis */ @Resource private RedisTemplate<String, Student> redisTemplate; @Test void save(){ // key 一般使用這個格式 look:student:id 用冒號隔開 redisTemplate.opsForValue().set("look:student:id",new Student(),1, TimeUnit.MINUTES); } }
結果
發現RedisTemplate預設使用了JDK的序列化方式儲存了key和value
解決亂碼
建立RedisConfig配置檔案
@Configuration
public class RedisConfig {
@Bean
public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory redisConnectionFactory) {
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(redisConnectionFactory);
//首先解決key的序列化方式
StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
redisTemplate.setKeySerializer(stringRedisSerializer);
//解決value的序列化方式
Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
//序列化時將類的資料型別存入json,以便反序列化的時候轉換成正確的型別
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL);
// 解決jackson2無法反序列化LocalDateTime的問題
objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
objectMapper.registerModule(new JavaTimeModule());
jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
return redisTemplate;
}
}
效果如下