依赖

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-avro</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
        </dependency>

pojo对象

@Data
public class TestEntity implements Serializable {
    private static final long serialVersionUID = 1L;
    /**
     * 创建时间
     */
    private LocalDateTime createTime;
    /**
     * 修改时间
     */
    private LocalDateTime updateTime;
}

全局配置

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

@Configuration
public class GlobalConfig {

    @Bean
    public ObjectMapper initObjectMapper(){
        ObjectMapper objectMapper=new ObjectMapper();
        JavaTimeModule javaTimeModule=new JavaTimeModule();
        javaTimeModule.addDeserializer(LocalDateTime.class,new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        javaTimeModule.addSerializer(LocalDateTime.class,new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        //localDateTime按照 "yyyy-MM-dd HH:mm:ss"的格式进行序列化、反序列化
        objectMapper.registerModule(javaTimeModule);

        return objectMapper;
    }
}

测试

1、数据准备

image.png

2、加全局配置测试返回数据

{
    "status":0,
    "data":[
        {
            "createTime":"2021-04-12 11:37:43",
            "updateTime":"2021-04-12 11:40:01"
        },
        {
            "createTime":"2021-04-12 11:41:18",
            "updateTime":"2021-04-12 11:41:42"
        },
        {
            "createTime":"2021-04-12 11:43:10",
            "updateTime":"2021-04-12 11:43:20"
        },
        {
            "createTime":null,
            "updateTime":null
        }
    ]
}

3、不加配置测试返回数据

{
    "status":0,
    "data":[
        {
            "createTime":"2021-04-12T11:37:43",
            "updateTime":"2021-04-12T11:40:01"
        },
        {
            "createTime":"2021-04-12T11:41:18",
            "updateTime":"2021-04-12T11:41:42"
        },
        {
            "createTime":"2021-04-12T11:43:10",
            "updateTime":"2021-04-12T11:43:20"
        },
        {
            "createTime":null,
            "updateTime":null
        }
    ]
}

参考链接：https://blog.csdn.net/weixin_43931625/article/details/107395262