spring controller 参数解析 以及Jackson 数据序列化和反序列化方案

package com.linkmcn.mcn.web.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.linkmcn.mcn.common.core.config.LocalDateTimeJsonDeserializer;
import com.linkmcn.mcn.common.core.config.LocalDateTimeJsonSerializer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.converter.Converter;
import org.springframework.util.StringUtils;

import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;


@Configuration
public class ConverterConfig {

    /**
     * 只识别 LocalDateTime 参数
     * 

     * 时间戳转localDateTime
     */
    @Bean
    public Converter longLocalDateTimeConverter() {
        return new Converter() {
            @Override
            public LocalDateTime convert(String str) {
                if (StringUtils.hasText(str)) {
                    long timestamp = Long.parseLong(str);
                    return LocalDateTime.ofInstant(Instant.ofEpochMilli(timestamp), ZoneId.systemDefault());
                }
                return null;
            }
        };
    }

    /**
     * @param
     * @Description: JackSon 序列化和反序列化的时候  识别LocalDateTime 入参为时间戳转日期 出参为日期转时间戳
     * @return: com.fasterxml.jackson.databind.ObjectMapper
     * @Author: Mr.Zhong
     * @Date: 2019-08-02 11:11
     */
    @Bean
    public ObjectMapper objectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        JavaTimeModule timeModule = new JavaTimeModule();
        timeModule.addSerializer(LocalDateTime.class, new LocalDateTimeJsonSerializer()); //此处要自定义JSON解析类
        timeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeJsonDeserializer());//此处要自定义JSON解析类        mapper.registerModule(timeModule);
        return mapper;
    }

/**
 * @program: mcn
 * @description: 自定义JSON 反序列化 跟上文 
 * @author: Mr.Zhong
 * @create: 2019-08-01 20:42
 **/
@JsonComponent  //如果是序列化则继承JsonSerializer
public class LocalDateTimeJsonDeserializer extends JsonDeserializer{
    @Override
    public LocalDateTime deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) {

        try {
            if (StringUtils.hasText(jsonParser.getText())) {
                return LocalDateTime.ofInstant(Instant.ofEpochMilli(Long.valueOf(jsonParser.getText())), ZoneId.systemDefault());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

}