LocalDateTime返回的格式为 2019-10-15T20:46:45，处理json返回时间中带有T的情况

因为LocalDateTime默认使用的iso 时间格式：所以返回json的时候时间会出现T

   /**
     * The ISO date-time formatter that formats or parses a date-time without
     * an offset, such as '2011-12-03T10:15:30'.
     * 

     * This returns an immutable formatter capable of formatting and parsing
     * the ISO-8601 extended offset date-time format.
     * The format consists of:
     * 

     * 
The {@link #ISO_LOCAL_DATE}
     * 
The letter 'T'. Parsing is case insensitive.
     * 
The {@link #ISO_LOCAL_TIME}
     * 
     * 

     * The returned formatter has a chronology of ISO set to ensure dates in
     * other calendar systems are correctly converted.
     * It has no override zone and uses the {@link ResolverStyle#STRICT STRICT} resolver style.
     */
    public static final DateTimeFormatter ISO_LOCAL_DATE_TIME;
    static {
        ISO_LOCAL_DATE_TIME = new DateTimeFormatterBuilder()
                .parseCaseInsensitive()
                .append(ISO_LOCAL_DATE)
                .appendLiteral('T')
                .append(ISO_LOCAL_TIME)
                .toFormatter(ResolverStyle.STRICT, IsoChronology.INSTANCE);
    }

解决办法：

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
import org.codehaus.jackson.annotate.JsonValue;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

/**
 * @Title: LocalDateTimeSerializerConfig
 * @Description:
 * @Auther:wangli
 * @Version: 1.0
 * @create 2019-08-22 15:23
 */
@Configuration
public class LocalDateTimeSerializerConfig {

    //方法 一

    @Bean
    public LocalDateTimeSerializer localDateTimeDeserializer() {
        return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
    }
    
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return builder -> builder.serializerByType(LocalDateTime.class, localDateTimeDeserializer());
    }

    //方法 二

 /*   @Bean(name = "mapperObject")
    public ObjectMapper getObjectMapper() {
        ObjectMapper om = new ObjectMapper();
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
        javaTimeModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
        om.registerModule(javaTimeModule);
        return om;
    }*/
}