MyBatis中对于LocalDateTime类型数据的查询限制主要包括以下几点:
MyBatis不支持直接对LocalDateTime类型数据进行查询,需要通过自定义TypeHandler来处理LocalDateTime类型的数据。
在Mapper.xml文件中,需要使用TypeHandler来处理LocalDateTime类型的参数和结果,例如:
<parameterMap type="map" id="myParameterMap">
<parameter property="startTime" javaType="java.time.LocalDateTime" jdbcType="TIMESTAMP" typeHandler="com.example.LocalDateTimeTypeHandler"/>
</parameterMap>
<select id="selectByTime" parameterMap="myParameterMap" resultType="com.example.User">
SELECT * FROM user WHERE start_time = #{startTime}
</select>
public class LocalDateTimeTypeHandler extends BaseTypeHandler<LocalDateTime> {
@Override
public void setNonNullParameter(PreparedStatement ps, int i, LocalDateTime parameter, JdbcType jdbcType) throws SQLException {
ps.setTimestamp(i, Timestamp.valueOf(parameter));
}
@Override
public LocalDateTime getNullableResult(ResultSet rs, String columnName) throws SQLException {
Timestamp timestamp = rs.getTimestamp(columnName);
return timestamp.toLocalDateTime();
}
@Override
public LocalDateTime getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
Timestamp timestamp = rs.getTimestamp(columnIndex);
return timestamp.toLocalDateTime();
}
@Override
public LocalDateTime getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
Timestamp timestamp = cs.getTimestamp(columnIndex);
return timestamp.toLocalDateTime();
}
}
亿速云「云服务器」,即开即用、新一代英特尔至强铂金CPU、三副本存储NVMe SSD云盘,价格低至29元/月。点击查看>>
相关推荐:MyBatis中localdatetime类型查询的性能优化方法有哪些