mybatisplus日期映射报错解决

Error attempting to get column ‘trans_start_time’ from result set. Cause: java.sql.SQLFeatureNotSupportedException: getObject with type\n; getObject with type; nested exception is java.sql.SQLFeatureNotSupportedException: getObject with type…

我使用mybatisplus的版本为3.5.2：

<properties>
    <spring-boot.version>2.6.3</spring-boot.version>
    <spring-cloud.version>2021.0.1</spring-cloud.version>
    <spring-cloud-alibaba.version>2021.0.1.0</spring-cloud-alibaba.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <fastjson.version>1.2.83</fastjson.version>
    <mybatis-plus.version>3.5.2</mybatis-plus.version>
    <mybatis.version>3.5.10</mybatis.version>
    <mysql.version>8.0.30</mysql.version>
    <hutool.version>5.8.7</hutool.version>
    <hutool-all.version>5.8.7</hutool-all.version>
    <druid-spring-boot-starter.version>1.2.8</druid-spring-boot-starter.version>
    <mybatis-plus-boot-starter.version>3.5.2</mybatis-plus-boot-starter.version>
    <mybatis-typehandlers-jsr310.version>1.0.1</mybatis-typehandlers-jsr310.version>
    <mapper-spring-boot-starter.version>4.2.1</mapper-spring-boot-starter.version>
    <commons-io.version>4.2.1</commons-io.version>
    <mail.version>1.4.7</mail.version>
</properties>

很奇怪，之前项目都没遇到过日期序列化的问题，今天突然报了日期无法正常序列化与反序列化的错误，查阅资料得知缺失序列化处理的jar包

添加以下有关序列化的jar包即可解决（已验证）
参考自：「兮家小二」https://blog.csdn.net/qq_41463655/article/details/106948345

<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-typehandlers-jsr310</artifactId>
    <version>1.0.1</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
    <version>2.9.2</version>
</dependency>

也有资料说配置日期序列化器与反序列化器即可（未验证）

import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

/**
 * LocalDateTime 日期适配器
 *
 * @author MoCha
 * @date 2019/11/30
 */
@Configuration
public class LocalDateTimeConvertConfig {
    
    
    @Value("${spring.jackson.date-format:yyyy-MM-dd HH:mm:ss}")
    private String pattern;

    /**
     * 配置LocalDateTime 序列化器与反序列化器
     * <p>
     * 说明：
     * 1. 下面配置的new LocalDateTimeDeserializer()为我们定制的LocalDateTime反序列化器
     */
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
    
    
        return builder -> {
    
    
            builder.serializerByType(LocalDateTime.class, localDateTimeSerializer());
            builder.deserializerByType(LocalDateTime.class, new LocalDateTimeDeserializer());
        };
    }

    /**
     * LocalDateTime 序列化器
     */
    @Bean
    public LocalDateTimeSerializer localDateTimeSerializer() {
    
    
        return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(pattern));
    }
}

import cn.hutool.core.date.DateTime;
import cn.hutool.core.date.DateUtil;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;

import java.io.IOException;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Date;

/**
 * LocalDateTime 反序列化器
 * <p>
 * 说明：
 * 1. 借用hutool相关工具类
 *
 * @author MoCha
 * @date 2019/11/30
 */
public class LocalDateTimeDeserializer extends JsonDeserializer<LocalDateTime> {
    
    
    @Override
    public LocalDateTime deserialize(JsonParser parser, DeserializationContext context) throws IOException {
    
    
        String dateStr = parser.getText();
        DateTime dateTime;
        try {
    
    
            dateTime = DateUtil.parse(dateStr);
        } catch (Exception e) {
    
    
            dateTime = DateUtil.parseDateTime(dateStr.replaceAll("T", " "));
        }
        Date date = dateTime.toJdkDate();
        Instant instant = date.toInstant();
        ZoneId zoneId = ZoneId.systemDefault();
        return instant.atZone(zoneId).toLocalDateTime();
    }

    @Override
    public Class<?> handledType() {
    
    
        // 关键
        return LocalDateTime.class;
    }
}

mybatisplus日期映射报错解决

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