使用@DateTimeFormat注解的时候报错

使用Springboot框架搭建项目

@DateTimeFormat作用是前后到后台的时间格式的转换,使用"yyyy-MM-dd"格式的字符串传入日期类型数据是入参转换没有问题,使用"yyyy-MM-dd HH:mm:ss"格式时间字符串就会报错

@Data
public class DemoVO {
	private Date inputTime;
}

 

报错信息:

"message": "Could not read document: Can not deserialize value of type java.util.Date from String \"2016-03-03 12:12:12\": not a valid representation (error: Failed to parse Date value '2016-03-03 12:12:12': Can not parse date \"2016-03-03 12:12:12Z\": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSS'Z'', parsing fails (leniency? null))\n at [Source: java.io.PushbackInputStream@541af790; line: 3, column: 14] (through reference chain: com.icbc.patrol.entity.vo.DemoVO[\"inputTime\"]); nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Can not deserialize value of type java.util.Date from String \"2016-03-03 12:12:12\": not a valid representation (error: Failed to parse Date value '2016-03-03 12:12:12': Can not parse date \"2016-03-03 12:12:12Z\": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSS'Z'', parsing fails (leniency? null))\n at [Source: java.io.PushbackInputStream@541af790; line: 3, column: 14] (through reference chain: com.icbc.patrol.entity.vo.DemoVO[\"inputTime\"])",

原因是springboot默认采用jackson,而jackson只能识别以下几种日期格式

"yyyy-MM-dd'T'HH:mm:ss.SSSZ";

"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";

"yyyy-MM-dd";

"EEE, dd MMM yyyy HH:mm:ss zzz";

long类型的时间戳(毫秒时间戳)

解决办法有以下几种:

1.、采用long时间戳,如:1537191968000 

2、在传参的对象上加上@JsonFormat注解并且指定时区

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

如果项目中使用json解析框架为fastjson框架,在实体字段上使用@JsonFormat注解格式化日期

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

3、采用全局处理方式统一处理,推荐这个做法,重写springboot默认转换

参考https://blog.csdn.net/qq906627950/article/details/79503801

public class MyDateFormat extends DateFormat {

    private DateFormat dateFormat;

    private SimpleDateFormat format1 = new SimpleDateFormat("yyy-MM-dd HH:mm:ss");

    public MyDateFormat(DateFormat dateFormat) {
        this.dateFormat = dateFormat;
    }

    @Override
    public StringBuffer format(Date date, StringBuffer toAppendTo, FieldPosition fieldPosition) {
        return dateFormat.format(date, toAppendTo, fieldPosition);
    }

    @Override
    public Date parse(String source, ParsePosition pos) {

        Date date = null;

        try {

            date = format1.parse(source, pos);
        } catch (Exception e) {

            date = dateFormat.parse(source, pos);
        }

        return date;
    }

    // 主要还是装饰这个方法
    @Override
    public Date parse(String source) throws ParseException {

        Date date = null;

        try {

            // 先按我的规则来
            date = format1.parse(source);
        } catch (Exception e) {

            // 不行,那就按原先的规则吧
            date = dateFormat.parse(source);
        }

        return date;
    }

    // 这里装饰clone方法的原因是因为clone方法在jackson中也有用到
    @Override
    public Object clone() {
        Object format = dateFormat.clone();
        return new MyDateFormat((DateFormat) format);
    }


}
@Configuration
public class WebConfig {

    @Autowired
    private Jackson2ObjectMapperBuilder jackson2ObjectMapperBuilder;

    @Bean
    public MappingJackson2HttpMessageConverter MappingJsonpHttpMessageConverter() {

        ObjectMapper mapper = jackson2ObjectMapperBuilder.build();

        // ObjectMapper为了保障线程安全性,里面的配置类都是一个不可变的对象
        // 所以这里的setDateFormat的内部原理其实是创建了一个新的配置类
        DateFormat dateFormat = mapper.getDateFormat();
        mapper.setDateFormat(new MyDateFormat(dateFormat));

        MappingJackson2HttpMessageConverter mappingJsonpHttpMessageConverter = new MappingJackson2HttpMessageConverter(
                mapper);
        return mappingJsonpHttpMessageConverter;
    }

}

 

你可能感兴趣的:(异常解决方案)