【springboot】后端使用LocalDate接收日期时
报错内容Failed to convert property value of type 'java.lang.String' to required type 'java.time.LocalDate' for property 'xxxx';nested exception is org.springframework.core.convert.ConversionFailedExceptio
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报错内容
Failed to convert property value of type 'java.lang.String' to required type 'java.time.LocalDate' for property 'xxxx';
nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [java.time.LocalDate] for value '2021-10-03';
nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [2021-10-03]
当后端的实体类 使用jdk8的时间时,会报以上的问题
这个时候就需要使用 @DateTimeFormat(pattern = “yyyy-MM-dd”) 注解
该注解中的pattern 要和前端传过来的日期格式保持一致
如果是 LocalDateTime 可以使用 @DateTimeFormat(pattern = “yyyy-MM-dd HH:mm:ss”)
这是反序列化时的做法,当序列化时 也就是后端传给前端时,转换时间格式使用 @JsonFormat(pattern = “yyyy-MM-dd”, timezone = “GMT+8”) 注解
@DateTimeFormat(pattern = "yyyy-MM-dd")
@JsonFormat(pattern = "yyyy-MM-dd", timezone = "GMT+8")
private LocalDate beginTime;
也可以设置全局
@Bean
@Primary
@ConditionalOnMissingBean(ObjectMapper.class)
public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
ObjectMapper objectMapper = builder.createXmlMapper(false).build();
// 全局配置序列化返回 JSON 处理
SimpleModule simpleModule = new SimpleModule();
//封装类型 Long ==> String
simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
simpleModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATETIME_PATTERN)));
simpleModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATETIME_PATTERN)));
simpleModule.addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN)));
simpleModule.addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_DATE_PATTERN)));
simpleModule.addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DatePattern.NORM_TIME_PATTERN)));
simpleModule.addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DatePattern.NORM_TIME_PATTERN)));
objectMapper.registerModule(simpleModule);
objectMapper.setDateFormat(new SimpleDateFormat(DatePattern.NORM_DATETIME_PATTERN));
objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
return objectMapper;
}
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