redis 解決key的亂碼問(wèn)題,并清理詳解

更新時(shí)間：2020年07月17日 08:36:47 作者：null_-

這篇文章主要介紹了redis 解決key的亂碼問(wèn)題,并清理詳解，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。一起跟隨小編過(guò)來(lái)看看吧

key亂碼問(wèn)題

因redis默認(rèn)使用JdkSerializationRedisSerializer來(lái)進(jìn)行序列化，造成key是亂碼，如下：

keys '*!report:flag:phon*'

1) "\xac\xed\x00\x05t\x00!report:flag:phone_156464"

2) "\xac\xed\x00\x05t\x00!report:flag:phone_198946"

3) "\xac\xed\x00\x05t\x00!report:flag:phone_183302"

解決key亂碼

private RedisTemplate redisTemplate;

 @Autowired(required = false)
 public void setRedisTemplate(RedisTemplate redisTemplate) {
  RedisSerializer stringSerializer = new StringRedisSerializer();
  redisTemplate.setKeySerializer(stringSerializer);
  redisTemplate.setValueSerializer(stringSerializer);
  redisTemplate.setHashKeySerializer(stringSerializer);
  redisTemplate.setHashValueSerializer(stringSerializer);
  this.redisTemplate = redisTemplate;
 }

清理亂碼key

官方不支持 del '*keys'方式模糊/批量刪除key。但是keys命令支持模糊匹配，所以采取以下方式：

方式1：可刪除正常key，無(wú)法刪除亂碼key

redis-cli -h 192.168.1.21 -a password -n 2 --scan --pattern '*!report:flag:phon*' | xargs redis-cli -h 192.168.1.21 -a password -n 2 DEL

方式2：成功刪除

del "\xac\xed\x00\x05t\x00!report:flag:phone_183302" "\xac\xed\x00\x05t\x00!report:flag:phone_198946"

補(bǔ)充知識(shí)：redis key和value的亂碼問(wèn)題解決，含日期轉(zhuǎn)化格式問(wèn)題

在項(xiàng)目中，遇到的問(wèn)題是redis的key和value出現(xiàn)的亂碼問(wèn)題：在這里插入圖片描述

而原本的內(nèi)容為下：

{
  "status":"success",
  "data":{
    "id":3,
    "title":"花林",
    "price":99,
    "stock":81,
    "description":"美女一只",
    "sales":17,
    "imgUrl":"https://xiaolei1996.oss-cn-shanghai.aliyuncs.com/blog/title/we1.jpg",
    "promoStatus":2,
    "promoPrice":50,
    "promoId":1,
    "startDate":"2020-03-23 21:50:59"
  }
}

原因：是因?yàn)楹蛂edis內(nèi)部的編碼協(xié)議出現(xiàn)了問(wèn)題，所以需要改進(jìn)。spring提供了一個(gè)優(yōu)化方案。springboot的redisTemplate改進(jìn)。

@Component
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 3600)
public class RedisConfig {
  @Bean
  public RedisTemplate redisTemplate(RedisConnectionFactory factory){
    RedisTemplate redisTemplate = new RedisTemplate();
    redisTemplate.setConnectionFactory(factory);

    //首先解決key的序列化問(wèn)題
    StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
    redisTemplate.setKeySerializer(stringRedisSerializer);

    //解決value的序列化問(wèn)題
    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

    return redisTemplate;
  }
}

比之前好了，但是還有點(diǎn)小問(wèn)題，json的數(shù)據(jù)比以前多了，這是因?yàn)槿掌诘霓D(zhuǎn)化出現(xiàn)問(wèn)題，這塊的知識(shí)觸及盲區(qū)，就先把解決方案寫(xiě)下面，以后有時(shí)間在研究。

public class JodaDateTimeJsonSerializer extends JsonSerializer<DateTime> {
  @Override
  public void serialize(DateTime value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
    gen.writeString(value.toString("yyyy-MM-dd HH:mm:ss"));

  }
}

public class JodaDateTimeJsonDeserializer extends JsonDeserializer<DateTime> {
  @Override
  public DateTime deserialize(JsonParser p, DeserializationContext ctxt
  ) throws IOException, JsonProcessingException {
    String dateString= p.readValueAs(String.class);
    DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");

    return DateTime.parse(dateString,dateTimeFormatter);//轉(zhuǎn)成
  }
}

@Component
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 3600)
public class RedisConfig {
  @Bean
  public RedisTemplate redisTemplate(RedisConnectionFactory factory){
    RedisTemplate redisTemplate = new RedisTemplate();
    redisTemplate.setConnectionFactory(factory);

    //首先解決key的序列化問(wèn)題
    StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
    redisTemplate.setKeySerializer(stringRedisSerializer);

    //解決value的序列化問(wèn)題
    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

    //改進(jìn)日期轉(zhuǎn)化問(wèn)題
    ObjectMapper objectMapper = new ObjectMapper();
    SimpleModule simpleModule = new SimpleModule();
    simpleModule.addSerializer(DateTime.class,new JodaDateTimeJsonSerializer());
    simpleModule.addDeserializer(DateTime.class,new JodaDateTimeJsonDeserializer());

//解決反序列化問(wèn)題	objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    objectMapper.registerModule(simpleModule);
    jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

    return redisTemplate;
  }
}

最后終于出現(xiàn)了預(yù)期的效果