springboot 处理之时间格式

Date 类型

前端传给后端

@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
private Date updateTime;

后端传给前端

1. application.yml配置

spring:
  ...
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss
        time-zone: GMT+8        
  ...

1. 字段加上注解

@JsonFormat(pattern="yyyy-MM-dd HH:mm:ss",timezone="GMT+8")
private Date updateTime;

LocalDateTime类型

前端传给后端

GET请求

@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
private LocalDateTime updateTime;

POST请求

1. 字段加上注解 （com.fasterxml.jackson.databind.annotation.JsonDeserialize )

   @JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-dd HH:mm:ss")
   private LocalDateTime updateTime;

   或者

   @JsonDeserialize(using = DateTimeDeserializer.class)
   private LocalDateTime updateTime;

2. 配置类

   /**
   * 参数配置
   * @author guojianfeng
   * @date 2019/10/16
   */
   public class DateTimeDeserializer extends JsonDeserializer<LocalDateTime> {
    @Override
    public LocalDateTime deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException, JsonProcessingException {
        if (StringUtils.isBlank(jsonParser.getText())){
            return null;
        }
        LocalDateTime localDateTime = LocalDateTime.parse(jsonParser.getText(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
        return localDateTime;
    }
   }

后端传给前端

1. 添加依赖

   <dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
    <version>2.8.9</version>
   </dependency>

2. 添加配置 ``` package com.clamc.valuationdisclosure.config;

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;

/**

• 描述：日期统一处理 *

• @author guojianfeng at 2019/9/15 16:09 */ @Configuration public class WebDateConfig { @Value(“${spring.jackson.date-format:yyyy-MM-dd HH:mm:ss}”) private String pattern;

  @Bean public LocalDateTimeSerializer localDateTimeDeserializer() {

   return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(pattern));

  }

  @Bean public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {

   return builder -> builder.serializerByType(LocalDateTime.class, localDateTimeDeserializer());

  } }

2. 当然因为后端传给前端是用的RestController，也就是序列化的方式，也是可以采用前端传给后端POST的请求的方式。
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### 和数据库匹配
1. 添加依赖
```xml
 <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-typehandlers-jsr310</artifactId>
            <version>1.0.1</version>
        </dependency>