想往SpringBoot项目中集成Redis的,就准备先编个测试类测试一下,结果遇到点问题。记录下
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:这个配置不加的话,会导致使用redisTemplate存储到redis上的key变成 value也是一样
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//开启注解
public class RedisConfig {
// @Bean
// public CacheManager cacheManager(RedisTemplate<?, ?> redisTemplate) {
// CacheManager cacheManager = new RedisCacheManager(redisTemplate);
// return cacheManager;
// /*RedisCacheManager rcm = new RedisCacheManager(redisTemplate);
// // 多个缓存的名称,目前只定义了一个
// rcm.setCacheNames(Arrays.asList("thisredis"));
// //设置缓存默认过期时间(秒)
// rcm.setDefaultExpiration(600);
// return rcm;*/
// }
// 以下两种redisTemplate自由根据场景选择
@Bean
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(connectionFactory);
//使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值(默认使用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来序列化和反序列化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、编写测试类
public class redis {
@Resource
RedisTemplate redisTemplate;
@Test
public void testRedis(){
redisTemplate.opsForValue().set("example:", "测试");
String toekn = (String) redisTemplate.opsForValue().get("example:");
System.err.println("====="+toekn+"===");
}
}
启动报空指针异常,原因是容器没有启动,单纯的测试是无法注入的,要在测试类加上注解
@RunWith(SpringRunner.class)
@SpringBootTest
public class redis {
@Resource
RedisTemplate redisTemplate;
@Test
public void testRedis(){
redisTemplate.opsForValue().set("example:", "测试");
String toekn = (String) redisTemplate.opsForValue().get("example:");
System.err.println("====="+toekn+"===");
}
}
通过启动spring容器来执行测试,但此时又报错:
java.lang.IllegalStateException:找不到@SpringBootconfiguration,需要在测试中使用@Contextconfiguration或@SpringBootTest(classes=…)
原因是测试的包名路径与分支不一致,当时图省事随意建了下测试类的包名。
改成一致跑起来就可以了。