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:00
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//article/details/
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; } }
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