很多时候日期格式输出是这样的
2018-10-09T17:39:07.097
中间有个T，尴尬，是的我们需要去掉这个T
这方法是springboot封装好了的，我们直接使用即可，普通的配置我就不贴了

教程

一、全局配置模式

创建日期config类

@Configuration
public class LocalDateTimeSerializerConfig {
    @org.springframework.beans.factory.annotation.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());
    }
}

实体类，get，set忽略

public class TestEntity {
    private String name;
    private LocalDateTime dateTimes;
}

controller使用

@GetMapping("/test")
    public TestEntity test(){
        TestEntity testEntity=new TestEntity();
        testEntity.setName("admin");
        testEntity.setDateTimes(LocalDateTime.now());
        return testEntity;
    }

成功效果

{"name":"admin","dateTimes":"2018-10-09 17:39:07"}

二，最为现在常用的方式

@JsonFormat注解

public class OrderInfo {

    @JsonFormat(locale = "zh", timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime createTime;

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

    public LocalDateTime getCreateTime() {
        return createTime;
    }

    public void setCreateTime(LocalDateTime createTime) {
        this.createTime = createTime;
    }

    public Date getUpdateTime() {
        return updateTime;
    }

    public void setUpdateTime(Date updateTime) {
        this.updateTime = updateTime;
    }
}

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