上海 经营性网站备案/搜索引擎优化的内容有哪些

1、启用并配置

添加 @EnableCaching 注解
并配置 RedisCacheManager

package config;import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.json.JsonMapper;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.mapping.VendorDatabaseIdProvider;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;import java.io.Serializable;
import java.time.Duration;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Properties;@Configuration
@EnableCaching
public class RedisConfigure implements WebMvcConfigurer {/*** redis 序列化* 否则redis会出现乱码或序列化失败*/@Beanpublic RedisTemplate<String, Serializable> redisTemplate(LettuceConnectionFactory connectionFactory) {RedisTemplate<String, Serializable> redisTemplate = new RedisTemplate<>();redisTemplate.setConnectionFactory(connectionFactory);StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();Jackson2JsonRedisSerializer<?> jackson2JsonRedisSerializer = defaultTypeSerializer();redisTemplate.setKeySerializer(stringRedisSerializer);redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);redisTemplate.setHashKeySerializer(stringRedisSerializer);redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);redisTemplate.afterPropertiesSet();return redisTemplate;}/*** 设置缓存管理器*/@Beanpublic RedisCacheManager getRedisCacheManager(RedisConnectionFactory factory) {RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()//变双冒号为单冒号,和redisTemplate约定一致.computePrefixWith(name -> name + ":").entryTtl(Duration.ofDays(7)).disableCachingNullValues().serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer())).serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(defaultTypeSerializer()));return RedisCacheManager.builder(factory).cacheDefaults(cacheConfiguration).transactionAware().build();}/*** 自动转换的Jackson2JsonRedisSerializer*/Jackson2JsonRedisSerializer<Object> defaultTypeSerializer() {// 1、配置 ObjectMapperObjectMapper objectMapper = JsonMapper.builder().visibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY).activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY)// 反序列化时对字段名的大小写不敏感.enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES)// 默认使用 类上的注解来指导序列化和反序列化.enable(MapperFeature.USE_ANNOTATIONS)// 不存在的字段时，不会抛出异常.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)// 当找不解析类型（含子类），不会抛异常，继续尝试反序列化.configure(DeserializationFeature.FAIL_ON_INVALID_SUBTYPE, false)// 忽略序列化和反序列化的大小写.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true)// 当找不到类型,会序列化成空对象.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false).build(); // 创建ObjectMapper实例;// 2.1 定义自定义的日期时间格式DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");// 2.2 创建模块并注册自定义的序列化器和反序列化器SimpleModule module = new SimpleModule();module.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(formatter));module.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(formatter));// 2.3 注册模块到 ObjectMapperobjectMapper.registerModule(module);// 3 Jackson2JsonRedisSerializerreturn new Jackson2JsonRedisSerializer<>(objectMapper, Object.class);}}

2 简单的使用

package service.impl;import java.util.List;/*** <p>* 服务实现类* </p>** @author fisec* @since 2024-04-24*/
@Service
public class IpWhitelistServiceImpl extends ServiceImpl<IpWhitelistMapper, IpWhitelist> implements IIpWhitelistService {//key 可选，一般是getId ，list一般量少使用@Override@Cacheable(value = RedisKeyConstants.IP_WHITE_LIST, key = "")public List<IpWhitelist> getWhitelist() {return this.list();}@Override@CacheEvict(value = RedisKeyConstants.IP_WHITE_LIST, allEntries = true)public void add(IpWhitelist ipWhitelist) {...}@Override@CacheEvict(value = RedisKeyConstants.IP_WHITE_LIST, allEntries = true)public void delete(Long id) {...}
}