springboot redis缓存乱码问题
1、创建一个spring boot应用，添加redis依赖，还有jackson依赖
2、启用缓存，添加配置类，附加注解@EnableCaching，并且覆盖父类方法，自定义keyGenerator荑樊综鲶,代码如下@Override @Bean public KeyGenerator keyGenerator() { // TODO Auto-generated method stub return new KeyGenerator() { @Override public Object generate(Object object, Method method, Object... objects) { // TODO Auto-generated method stub StringBuilder sb = new StringBuilder(); sb.append(object.getClass().getName()); sb.append(method.getName()); for (Object obj : objects) { if (obj != null) { sb.append(obj.toString()); } } return sb.toString(); } }; }
3、添加一个业务类，使用缓存注解，用于测试
4、在启动类中调用业务类方法，如下图所示
5、到redis数据库中查找存入的数据，发现value为一堆乱码
6、解决办法，自定义CacheManager巳呀屋饔,在配置类中添加如下代码private RedisSerializer<String> keySerializer() { return new StringRedisSerializer(); } //使用Jackson序列化器 private RedisSerializer<Object> valueSerializer() { return new GenericJackson2JsonRedisSerializer(); }@Bean public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) { //缓存配置对象 RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig(); redisCacheConfiguration = redisCacheConfiguration.entryTtl(Duration.ofMinutes(30L)) //设置缓存的默认超时时间：30分钟 .disableCachingNullValues() //如果是空值，不缓存 .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer())) //设置key序列化器 .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer((valueSerializer()))); //设置value序列化器 return RedisCacheManager .builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory)) .cacheDefaults(redisCacheConfiguration).build(); }
7、重新测试，数据正常肉眼可查看，json数据
8、整个配置文竭惮蚕斗件如下package com.zuli;import org.springframework.cac茑霁酌绡he.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.RedisCacheConfiguration;import org.springframework.data.redis.cache.RedisCacheManager;import org.springframework.data.redis.cache.RedisCacheWriter;import org.springframework.data.redis.connection.RedisConnectionFactory;import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;import org.springframework.data.redis.serializer.RedisSerializationContext;import org.springframework.data.redis.serializer.RedisSerializer;import org.springframework.data.redis.serializer.StringRedisSerializer;import java.lang.reflect.Method;import java.time.Duration;@Configuration@EnableCachingpublic class CachingConfig extends CachingConfigurerSupport { private RedisSerializer<String> keySerializer() { return new StringRedisSerializer(); } //使用Jackson序列化器 private RedisSerializer<Object> valueSerializer() { return new GenericJackson2JsonRedisSerializer(); } @Bean public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) { //缓存配置对象 RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig(); redisCacheConfiguration = redisCacheConfiguration.entryTtl(Duration.ofMinutes(30L)) //设置缓存的默认超时时间：30分钟 .disableCachingNullValues() //如果是空值，不缓存 .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer())) //设置key序列化器 .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer((valueSerializer()))); //设置value序列化器 return RedisCacheManager .builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory)) .cacheDefaults(redisCacheConfiguration).build(); } @Override @Bean public KeyGenerator keyGenerator() { // TODO Auto-generated method stub return new KeyGenerator() { @Override public Object generate(Object object, Method method, Object... objects) { // TODO Auto-generated method stub StringBuilder sb = new StringBuilder(); sb.append(object.getClass().getName()); sb.append(method.getName()); for (Object obj : objects) { if (obj != null) { sb.append(obj.toString()); } } return sb.toString(); } }; }}