Java 8 datetime type `java.time.LocalDateTime` not supported by default add Module com.fasterxml.jac

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之前的项目好好的，突然报Java 8 date/time type java.time.LocalDateTime not supported by default: add Module “com.fasterxml.jackson.datatype:jackson-datatype-jsr310” to enable handling错误，
原因是之前基本上没有涉及LocalDateTime相关的代码所有问题一直没有发现，我们使用springboot的默认的jackson序列化，也没有封装自己的序列化bean，发现还是由于序列化组件的原因，现记录一下解决方式，
以下方式只我试验我们的项目中可用，如有误请指定，可能下面的方式也不适合于所有的情况。

解决方法：直接在增加一个Bean即可：Jackson2ObjectMapperBuilderCustomizer

主要还是需要增加那个LocalDate相关的序列器解析

一、在Configuration中增加Bean如下：

package cn.gzsendi.config;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.Map;

import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;

/**
 * Jackson2ObjectMapperBuilderCustomizer
 * Java8序列化时间处理器配置
 * @author liujh
 */
@Configuration
public class LocalDateTimeSerializerConfig {
    
    
	
	private static final DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
    private static final DateTimeFormatter DATE_FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd");
    private static final DateTimeFormatter TIME_FORMATTER = DateTimeFormatter.ofPattern("HH:mm:ss");
    
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
    
    
        Map<Class<?>, JsonSerializer<?>> serializers = new HashMap<>();
        serializers.put(LocalDateTime.class, new LocalDateTimeSerializer(DATE_TIME_FORMATTER));
        serializers.put(LocalDate.class, new LocalDateSerializer(DATE_FORMATTER));
        serializers.put(LocalTime.class, new LocalTimeSerializer(TIME_FORMATTER));
        Map<Class<?>, JsonDeserializer<?>> deserializers = new HashMap<>();
        deserializers.put(LocalDateTime.class, new LocalDateTimeDeserializer(DATE_TIME_FORMATTER));
        deserializers.put(LocalDate.class, new LocalDateDeserializer(DATE_FORMATTER));
        deserializers.put(LocalTime.class, new LocalTimeDeserializer(TIME_FORMATTER));
        return builder -> builder.serializersByType(serializers).deserializersByType(deserializers);
    }

}

增加完bean后，重启springboot测试效果即可