SpringBoot--日期格式化

1、為了統一轉轉，可以使用日期格式化類

package com.example.demo.resource;

import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

@Configuration
public class LocalDateConfig {

    @Value("${spring.jackson.data-format:yyyy-MM-dd HH:mm:ss}")
    private String pattern;

    @Bean
    public LocalDateTimeSerializer localDateTimeSerializer(){
        return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(pattern));
    }

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer(){
        return builder->builder.serializerByType(LocalDateTime.class,localDateTimeSerializer());
    }
}

2、定義Bean對象

　　如果使用通用的格式化，直接定義就OK，如果是需要個性化定制，在屬性上單加注解即可。

package com.example.demo.entity;

import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;

import java.time.LocalDateTime;

@Data
public class Order {
    @JsonFormat(pattern = "yyyy-MM-dd")
    private LocalDateTime payTime;

    private LocalDateTime newTime;

}

3、Controller

　　新增Controller中方法對第2步中的兩個屬性賦值

    @ResponseBody
    @RequestMapping(value = "/order")
    public Order getOrder(){
        Order order = new Order();
        order.setPayTime(LocalDateTime.now());
        order.setNewTime(LocalDateTime.now());
        return  order;
    }

4、測試