问题：
存在redis里面的内容有日期，但是存进去的格式不对。
1 @Cacheable(value = "banner", key = "'selectIndexList'")
2 @ApiOperation(value = "获取首页banner")
3 @GetMapping4 public R index() {
5 List<CmsBanner> list = bannerService.selectIndexList();
6 return R.ok().data("bannerList", list);
7 }
1 Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.time.LocalDateTime` (no Creators, like default construct, exist): cannot deserialize from Object value (no delegate- or property-based Creator)
2 at [Source: (byte[])"["com.atguigu.commonutils.R",{"success":true,"code":20000,"message":"成功","data":["java.util.HashMap",{"bannerList":["java.util.ArrayList",[["com.atguigu.cmsservice.entity.CmsBanner",{"id":"1194607458461216770","title":"Golang","typeId":"","imageUrl":"https://my-online-education-project.oss-cn-beijing.aliyuncs.com/2021/05/03/3dc5bbacc2ea4f9fa8e1cf9e73ab4f0cgo.png","color":null,"linkUrl":"/course/1389184259991093249","sort":0,"gmtCreate":{"date":{"year":2021,"month":"MAY","day":4,"dayOfMonth":"[truncated 2351 bytes]; line: 1, column: 446] (through reference chain: com.atguigu.commonutils.R["data"]->java.util.HashMap["bannerList"]->java.util.ArrayList[0]->com.atguigu.cmsservice.entity.CmsBanner["gmtCreate"])
3 at com.fasterxml.jackson.databind.exc.InvalidDefinitionException.from(InvalidDefinitionException.java:67)
4 at com.fasterxml.jackson.databind.DeserializationContext.reportBadDefinition(DeserializationContext.java:1589)
5 at com.fasterxml.jackson.databind.DeserializationContext.handleMissingInstantiator(DeserializationContext.java:1055)
6 at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:1297)
7 at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:326)
8 at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)
9 at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:129)
10 at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:288)
11 at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
12 at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer._deserialize(AsArrayTypeDeserializer.java:120)
13 at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer.deserializeTypedFromAny(AsArrayTypeDeserializer.java:71)
14 at com.fasterxml.jackson.databind.deser.std.UntypedObjectDeserializer$Vanilla.deserializeWithType(UntypedObjectDeserializer.java:712)
15 at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:288)
16 at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:245)
17 at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:27)
18 at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer._deserialize(AsArrayTypeDeserializer.java:120)
19 at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer.deserializeTypedFromAny(AsArrayTypeDeserializer.java:71)
20 at com.fasterxml.jackson.databind.deser.std.UntypedObjectDeserializer$Vanilla.deserializeWithType(UntypedObjectDeserializer.java:712)
21 at com.fasterxml.jackson.databind.deser.std.MapDeserializer._readAndBindStringKeyMap(MapDeserializer.java:529)
22 at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:364)
23 at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:29)
24 at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer._deserialize(AsArrayTypeDeserializer.java:120)
25 at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer.deserializeTypedFromObject(AsArrayTypeDeserializer.java:61)
26 at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserializeWithType(MapDeserializer.java:400)
27 at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:138)
28 at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:288)
29 at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:151)
30 at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer._deserialize(AsArrayTypeDeserializer.java:120)
31 at com.fasterxml.jackson.databind.jsontype.impl.AsArrayTypeDeserializer.deserializeTypedFromAny(AsArrayTypeDeserializer.java:71)
32 at com.fasterxml.jackson.databind.deser.std.UntypedObjectDeserializer$Vanilla.deserializeWithType(UntypedObjectDeserializer.java:712)
33 at com.fasterxml.jackson.databind.deser.impl.TypeWrappedDeserializer.deserialize(TypeWrappedDeserializer.java:68)
34 at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4202)
35 at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3309)
36 at org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer.deserialize(Jackson2JsonRedisSerializer.java:73)
37 ... 65 more
redis里面内容：
“[/”com.atguigu.commonutils.R/”,{/”success/”:true,/”code/”:20000,/”message/”:/”/xe6/x88/x90/xe5/x8a/x9f/”,/”data/”:[/”java.util.HashMap/”,{/”bannerList/”:[/”java.util.ArrayList/”,[[/”com.atguigu.cmsservice.entity.CmsBanner/”,{/”id/”:/”1194607458461216770/”,/”title/”:/”Golang/”,/”typeId/”:/”/”,/”imageUrl/”:/”https://my-online-education-project.oss-cn-beijing.aliyuncs.com/2021/05/03/3dc5bbacc2ea4f9fa8e1cf9e73ab4f0cgo.png/”,/”color/”:null,/”linkUrl/”:/”/course/1389184259991093249/”,/”sort/”:0,/”gmtCreate/”:{/”date/”:{/”year/”:2021,/”month/”:/”MAY/”,/”day/”:4,/”dayOfMonth/”:4,/”monthValue/”:5,/”chronology/”:{/”id/”:/”ISO/”,/”calendarType/”:/”iso8601/”},/”dayOfWeek/”:/”TUESDAY/”,/”era/”:[/”java.time.chrono.IsoEra/”,/”CE/”],/”dayOfYear/”:124,/”leapYear/”:false,/”prolepticMonth/”:24256},/”time/”:{/”hour/”:1,/”minute/”:20,/”second/”:50,/”nano/”:0},/”month/”:/”MAY/”,/”year/”:2021,/”dayOfMonth/”:4,/”hour/”:1,/”minute/”:20,/”monthValue/”:5,/”nano/”:0,/”second/”:50,/”dayOfWeek/”:/”TUESDAY/”,/”dayOfYear/”:124,/”chronology/”:[/”java.time.chrono.IsoChronology/”,{/”id/”:/”ISO/”,/”calendarType/”:/”iso8601/”}]},/”gmtModified/”:{/”date/”:{/”year/”:2021,/”month/”:/”MAY/”,/”day/”:4,/”dayOfMonth/”:4,/”monthValue/”:5,/”chronology/”:{/”id/”:/”ISO/”,/”calendarType/”:/”iso8601/”},/”dayOfWeek/”:/”TUESDAY/”,/”era/”:[/”java.time.chrono.IsoEra/”,/”CE/”],/”dayOfYear/”:124,/”leapYear/”:false,/”prolepticMonth/”:24256},/”time/”:{/”hour/”:1,/”minute/”:20,/”second/”:52,/”nano/”:0},/”month/”:/”MAY/”,/”year/”:2021,/”dayOfMonth/”:4,/”hour/”:1,/”minute/”:20,/”monthValue/”:5,/”nano/”:0,/”second/”:52,/”dayOfWeek/”:/”TUESDAY/”,/”dayOfYear/”:124,/”chronology/”:[/”java.time.chrono.IsoChronology/”,{/”id/”:/”ISO/”,/”calendarType/”:/”iso8601/”}]}}],[/”com.atguigu.cmsservice.entity.CmsBanner/”,{/”id/”:/”1194607458461216769/”,/”title/”:/”C++/”,/”typeId/”:/”/”,/”imageUrl/”:/”https://my-online-education-project.oss-cn-beijing.aliyuncs.com/2021/05/03/e02259dcfb244936a9ecae3db3377970safjkalsfj.jpg/”,/”color/”:null,/”linkUrl/”:/”/course/1389181626911899650/”,/”sort/”:2,/”gmtCreate/”:{/”date/”:{/”year/”:2021,/”month/”:/”MAY/”,/”day/”:4,/”dayOfMonth/”:4,/”monthValue/”:5,/”chronology/”:{/”id/”:/”ISO/”,/”calendarType/”:/”iso8601/”},/”dayOfWeek/”:/”TUESDAY/”,/”era/”:[/”java.time.chrono.IsoEra/”,/”CE/”],/”dayOfYear/”:124,/”leapYear/”:false,/”prolepticMonth/”:24256},/”time/”:{/”hour/”:1,/”minute/”:19,/”second/”:17,/”nano/”:0},/”month/”:/”MAY/”,/”year/”:2021,/”dayOfMonth/”:4,/”hour/”:1,/”minute/”:19,/”monthValue/”:5,/”nano/”:0,/”second/”:17,/”dayOfWeek/”:/”TUESDAY/”,/”dayOfYear/”:124,/”chronology/”:[/”java.time.chrono.IsoChronology/”,{/”id/”:/”ISO/”,/”calendarType/”:/”iso8601/”}]},/”gmtModified/”:{/”date/”:{/”year/”:2021,/”month/”:/”MAY/”,/”day/”:4,/”dayOfMonth/”:4,/”monthValue/”:5,/”chronology/”:{/”id/”:/”ISO/”,/”calendarType/”:/”iso8601/”},/”dayOfWeek/”:/”TUESDAY/”,/”era/”:[/”java.time.chrono.IsoEra/”,/”CE/”],/”dayOfYear/”:124,/”leapYear/”:false,/”prolepticMonth/”:24256},/”time/”:{/”hour/”:1,/”minute/”:19,/”second/”:20,/”nano/”:0},/”month/”:/”MAY/”,/”year/”:2021,/”dayOfMonth/”:4,/”hour/”:1,/”minute/”:19,/”monthValue/”:5,/”nano/”:0,/”second/”:20,/”dayOfWeek/”:/”TUESDAY/”,/”dayOfYear/”:124,/”chronology/”:[/”java.time.chrono.IsoChronology/”,{/”id/”:/”ISO/”,/”calendarType/”:/”iso8601/”}]}}]]]}]}]
可以看出来应该是序列化日期对象的时候失败了。
解决：
注入如下的bean对象
1 @Bean(name = "mapperObject")
2 public ObjectMapper getObjectMapper() {
3 ObjectMapper om = new ObjectMapper();
4 JavaTimeModule javaTimeModule = new JavaTimeModule();
5 javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
6 javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
7 javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
8 om.registerModule(javaTimeModule);
9 return om;
10 }
再在实体类的时间属性上面加上以下注解
@JsonDeserialize(using = LocalDateTimeDeserializer.class) @JsonSerialize(using = LocalDateTimeSerializer.class) private LocalDateTime gmtModified;
原创文章，作者：506227337，如若转载，请注明出处：https://blog.ytso.com/272037.html