相信大家应该都知道,在实体Entity里面,可以使用java.sql.Date、java.sql.Timestamp、java.util.Date来映射到数据库的date、timestamp、datetime等字段
但是,java.sql.Date、java.sql.Timestamp、java.util.Date这些类都不好用,很多方法都过时了。
Java8里面新出来了一些API,LocalDate、LocalTime、LocalDateTime 非常好用
默认的情况下,在mybatis里面不支持java8的时间、日期。直接使用,会报如下错误
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Caused by: java.lang.IllegalStateException: No typehandler found
for
property createTime
at org.apache.ibatis.mapping.ResultMapping$Builder.validate(ResultMapping.java:
151
)
at org.apache.ibatis.mapping.ResultMapping$Builder.build(ResultMapping.java:
140
)
at org.apache.ibatis.builder.MapperBuilderAssistant.buildResultMapping(MapperBuilderAssistant.java:
382
)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.buildResultMappingFromContext(XMLMapperBuilder.java:
378
)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:
280
)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElement(XMLMapperBuilder.java:
252
)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.resultMapElements(XMLMapperBuilder.java:
244
)
at org.apache.ibatis.builder.xml.XMLMapperBuilder.configurationElement(XMLMapperBuilder.java:
116
)
...
81
common frames omitted
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解决方法如下:
直接加入如下依赖
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<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-typehandlers-jsr310</artifactId>
<version>
1.0
.
1
</version>
</dependency>
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配置好这个依赖之后,就可以把Entity里面的Date替换成LocalDate、LocalDateTime了,其他的不用改
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public
class
User {
private
Integer id;
private
String name;
private
LocalDate createDate;
private
LocalDateTime createTime;
}
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以上仅在mybatis 3.4.0版本中测试有效
如果使用的mybatis版本低于3.4.0,则还需要配置如下
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<typeHandlers>
<typeHandler handler=
"org.apache.ibatis.type.InstantTypeHandler"
/>
<typeHandler handler=
"org.apache.ibatis.type.LocalDateTimeTypeHandler"
/>
<typeHandler handler=
"org.apache.ibatis.type.LocalDateTypeHandler"
/>
<typeHandler handler=
"org.apache.ibatis.type.LocalTimeTypeHandler"
/>
<typeHandler handler=
"org.apache.ibatis.type.OffsetDateTimeTypeHandler"
/>
<typeHandler handler=
"org.apache.ibatis.type.OffsetTimeTypeHandler"
/>
<typeHandler handler=
"org.apache.ibatis.type.ZonedDateTimeTypeHandler"
/>
</typeHandlers>
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