SpringBoot Web Java8日期处理

一、输出结果（Java8日期类型转换成字符串）二、接收参数（字符串转换Java8日期类型）

方式1：可在对象属性上单独添加@com.fasterxml.jackson.annotation.JsonFormat

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

方式2：全局设置

import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
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 LocalDateTimeSerializerConfig {


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

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

    
    @Bean
    public LocalDateTimeDeserializer localDateTimeDeserializer() {
        return new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(dateTimePattern));
    }

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

方式1：可在controller方法参数上、对象属性上单独添加@org.springframework.format.annotation.DateTimeFormat

//controller方法参数上
@PostMapping("/date")
public void date(@RequestParam("date") @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") LocalDateTime date) {
    // ...
}

//对象属性上
@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
private LocalDateTime createTime;

方式2：全局设置
通过application.yaml配置文件进行设置

spring:
  # springboot接受日期字符串成格式
  mvc.format:
    date: yyyy-MM-dd
    date-time: yyyy-MM-dd HH:mm:ss
    time: HH:mm:ss

亦可添加jackson日期格式配置（非必须）

spring:
  # springboot接受日期字符串成格式
  mvc.format:
    date: yyyy-MM-dd
    date-time: yyyy-MM-dd HH:mm:ss
    time: HH:mm:ss

  # jackson配置（jackson配置非必须，以下配置仅对输出结果为java.util.Date类型生效）
  jackson:
    # springboot输出日期格式配置
    date-format: yyyy-MM-dd HH:mm:ss

参考：
https://www.baeldung.com/spring-date-parameters