SpringBoot的json序列化及时间序列化处理

使用场景：前台的多种时间格式存入后台，后台返回同时的时间格式到前台。

1 在config目录下配置jscksonConfig.java

package com.test.domi.config;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Primary;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import java.io.IOException;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 时间序列化
 */
public class JacksonConfig {

    @Bean
    @Primary
    @ConditionalOnMissingBean
    public ObjectMapper jacksonOnjectMapper(Jackson2ObjectMapperBuilder builder){
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
        //将json属性的空值null转化为空字符串""
        objectMapper.getSerializerProvider().setNullValueSerializer(new JsonSerializer