解决 SpringBoot 在 JDK8 中 LocalDateTime (反)序列化问题问题复现解决方案

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问题复现

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Java 8 date/time type `java.time.LocalDateTime` not supported by default:add Module "com.fasterxml.jackson.datatype:jackson-datatype-jsr310" to enable handling....

翻译

在默认情况下Java 8不支持 LocalDateTime 需要添加 com.fasterxml.jackson.datatype:jackson-datatype-jsr310 依赖

原因

没有添加序列化和反序列化器

解决方案

添加依赖

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<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
    <version>2.13.0</version>
</dependency>

指定LocalDateTime的序列化以及反序列化器

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@JsonDeserialize(using = LocalDateTimeDeserializer.class)
@JsonSerialize(using = LocalDateTimeSerializer.class)

例如：

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import com.baomidou.mybatisplus.annotation.*;

import java.time.LocalDateTime;
import java.io.Serializable;

import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import io.swagger.annotations.ApiModelProperty;

public class Workorder implements Serializable {
    private static final long serialVersionUID = 1L;

@ApiModelProperty(value = "创建时间")
    @JsonDeserialize(using = LocalDateTimeDeserializer.class)
    @JsonSerialize(using = LocalDateTimeSerializer.class)
    @TableField(fill = FieldFill.INSERT)
    private LocalDateTime createTime;

@ApiModelProperty(value = "更新时间")
    @JsonDeserialize(using = LocalDateTimeDeserializer.class)
    @JsonSerialize(using = LocalDateTimeSerializer.class)
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private LocalDateTime updateTime;
}

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import com.baomidou.mybatisplus.annotation.*;

import java.time.LocalDateTime;
import java.io.Serializable;

import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import io.swagger.annotations.ApiModelProperty;


public class Workorder implements Serializable {
    private static final long serialVersionUID = 1L;

    @ApiModelProperty(value = "创建时间")
    @JsonDeserialize(using = LocalDateTimeDeserializer.class)
    @JsonSerialize(using = LocalDateTimeSerializer.class)
    @TableField(fill = FieldFill.INSERT)
    private LocalDateTime createTime;

    @ApiModelProperty(value = "更新时间")
    @JsonDeserialize(using = LocalDateTimeDeserializer.class)
    @JsonSerialize(using = LocalDateTimeSerializer.class)
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private LocalDateTime updateTime;
}