redis 解決key的亂碼問題,并清理詳解

2020-10-28 21:27:37

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key亂碼問題

因redis默認使用JdkSerializationRedisSerializer來進行序列化，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"

補充知識：redis key和value的亂碼問題解決，含日期轉化格式問題

在項目中，遇到的問題是redis的key和value出現的亂碼問題：在這里插入圖片描述

而原本的內容為下：

{  "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：是因為和redis內部的編碼協議出現了問題，所以需要改進。spring提供了一個優化方案。springboot的redisTemplate改進。

@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的序列化問題    StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();    redisTemplate.setKeySerializer(stringRedisSerializer);    //解決value的序列化問題    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);    return redisTemplate;  }}

比之前好了，但是還有點小問題，json的數據比以前多了，這是因為日期的轉化出現問題，這塊的知識觸及盲區，就先把解決方案寫下面，以后有時間在研究。

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的序列化問題    StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();    redisTemplate.setKeySerializer(stringRedisSerializer);    //解決value的序列化問題    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);    //改進日期轉化問題    ObjectMapper objectMapper = new ObjectMapper();    SimpleModule simpleModule = new SimpleModule();    simpleModule.addSerializer(DateTime.class,new JodaDateTimeJsonSerializer());    simpleModule.addDeserializer(DateTime.class,new JodaDateTimeJsonDeserializer());//解決反序列化問題	objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);    objectMapper.registerModule(simpleModule);    jackson2JsonRedisSerializer.setObjectMapper(objectMapper);    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);    return redisTemplate;  }}

最后終于出現了預期的效果