想往SpringBoot項目中集成Redis的,就準備先編個測試類測試一下,結果遇到點問題。記錄下
一、集成redis
1、pom文件
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.9.0</version>
</dependency>
2、application.yml
spring:
redis:
host: 127.0.0.1
port: 6379
database: 3
jedis:
pool:
max-active: 8
max-wait: 10
min-idle: 0
max-idle: 8
password:
timeout: 20000
3、配置文件RedisConfig
2020.04.27:注意:這個配置不加的話,會導致使用redisTemplate存儲到redis上的key變成 value也是一樣
package com.jsyl.stfw.config;
import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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;
/**
* 作者: Pagegle李
* 版本:1.0
**/
@Configuration
@EnableCaching//開啓註解
public class RedisConfig {
// @Bean
// public CacheManager cacheManager(RedisTemplate<?, ?> redisTemplate) {
// CacheManager cacheManager = new RedisCacheManager(redisTemplate);
// return cacheManager;
// /*RedisCacheManager rcm = new RedisCacheManager(redisTemplate);
// // 多個緩存的名稱,目前只定義了一個
// rcm.setCacheNames(Arrays.asList("thisredis"));
// //設置緩存默認過期時間(秒)
// rcm.setDefaultExpiration(600);
// return rcm;*/
// }
// 以下兩種redisTemplate自由根據場景選擇
@Bean
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(connectionFactory);
//使用Jackson2JsonRedisSerializer來序列化和反序列化redis的value值(默認使用JDK的序列化方式)
Jackson2JsonRedisSerializer serializer = new Jackson2JsonRedisSerializer(Object.class);
ObjectMapper mapper = new ObjectMapper();
mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
serializer.setObjectMapper(mapper);
template.setValueSerializer(serializer);
//使用StringRedisSerializer來序列化和反序列化redis的key值
template.setKeySerializer(new StringRedisSerializer());
template.afterPropertiesSet();
return template;
}
@Bean
public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory factory) {
StringRedisTemplate stringRedisTemplate = new StringRedisTemplate();
stringRedisTemplate.setConnectionFactory(factory);
return stringRedisTemplate;
}
}
二、編寫測試類
public class redis {
@Resource
RedisTemplate redisTemplate;
@Test
public void testRedis(){
redisTemplate.opsForValue().set("example:", "測試");
String toekn = (String) redisTemplate.opsForValue().get("example:");
System.err.println("====="+toekn+"===");
}
}
啓動報空指針異常,原因是容器沒有啓動,單純的測試是無法注入的,要在測試類加上註解
@RunWith(SpringRunner.class)
@SpringBootTest
public class redis {
@Resource
RedisTemplate redisTemplate;
@Test
public void testRedis(){
redisTemplate.opsForValue().set("example:", "測試");
String toekn = (String) redisTemplate.opsForValue().get("example:");
System.err.println("====="+toekn+"===");
}
}
通過啓動spring容器來執行測試,但此時又報錯:
java.lang.IllegalStateException:找不到@SpringBootconfiguration,需要在測試中使用@Contextconfiguration或@SpringBootTest(classes=…)
原因是測試的包名路徑與分支不一致,當時圖省事隨意建了下測試類的包名。
改成一致跑起來就可以了。