Question

在Cassandra中，列类型设置为Date，而在Model类中，字段类型设置为带有getter和setter的java.util.Date。在com.datastax.driver.mapping.Mapper.save期间，我收到以下异常：

Codec not found for requested operation: [date <-> java.util.Date]

Caused by: com.datastax.driver.core.exceptions.CodecNotFoundException: Codec not found for requested operation: [date <-> java.util.Date]
at com.datastax.driver.core.exceptions.CodecNotFoundException.copy(CodecNotFoundException.java:56)
at com.datastax.driver.core.exceptions.CodecNotFoundException.copy(CodecNotFoundException.java:25)
at com.datastax.driver.mapping.DriverThrowables.propagateCause(DriverThrowables.java:41)
at com.datastax.driver.mapping.Mapper.save(Mapper.java:272)

在Google搜索过程中找到以下内容：

DATE      <-> com.datastax.driver.core.LocalDate : use getDate()

Answer 1

您必须将java.util.Date转换为com.datastax.driver.core.LocalDate

示例：

 LocalDate localDate = LocalDate.fromMillisSinceEpoch(date.getTime());

Answer 2

我在使用时间戳时遇到了同样的问题

reactor.core.Exceptions$ErrorCallbackNotImplemented: com.datastax.oss.driver.api.core.type.codec.CodecNotFoundException: Codec not found for requested operation: [TIMESTAMP <-> java.util.Date]
Caused by: com.datastax.oss.driver.api.core.type.codec.CodecNotFoundException: Codec not found for requested operation: [TIMESTAMP <-> java.util.Date]
    at com.datastax.oss.driver.internal.core.type.codec.registry.CachingCodecRegistry.createCodec(CachingCodecRegistry.java:609) ~[java-driver-core-4.9.0.jar:na]
    at com.datastax.oss.driver.internal.core.type.codec.registry.DefaultCodecRegistry$1.load(DefaultCodecRegistry.java:95) ~[java-driver-core-4.9.0.jar:na]
    at com.datastax.oss.driver.internal.core.type.codec.registry.DefaultCodecRegistry$1.load(DefaultCodecRegistry.java:92) ~[java-driver-core-4.9.0.jar:na]

从驱动程序 4.0 开始，CQL 类型时间戳不再映射到 java.util.Date，而是映射到 java.time.Instant。使用 Instant 对我有用。

找不到所请求操作的编解码器：[date＆lt; - ＆gt; java.util.Date]

2 个答案: