Question

我有以下配置：

    @Bean
    @Primary
    public ObjectMapper objectMapper(Jackson2ObjectMapperBuilder builder) {
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
//        objectMapper.configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, false);
        return objectMapper;
    }

以及以下依赖项：

ext {
        springBootVersion = '1.5.2.RELEASE'
    }
.... 
dependencies {
    compile('org.springframework.boot:spring-boot-starter-websocket')
    compile("org.springframework:spring-messaging")
    compile('org.springframework.boot:spring-boot-starter-actuator')
    compile('org.springframework.boot:spring-boot-starter-thymeleaf')
    compile('org.springframework.boot:spring-boot-starter-validation')
    compile('org.springframework.boot:spring-boot-starter-web')
    compile group: 'net.jcip', name: 'jcip-annotations', version: '1.0'
    compile ("com.fasterxml.jackson.datatype:jackson-datatype-jsr310")
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

我添加了以下控制器：

@PostMapping("/validation_test")
    public String testValidation(@Valid @RequestBody ClientInputMessage clientInputMessage, BindingResult result) {
        logger.info(Arrays.toString(result.getAllErrors().toArray()));
        return "main";
    }


public class ClientInputMessage {
    @NotEmpty
    private String num1;
    @NotEmpty
    private String num2;
    @Past
    private LocalDateTime date;

如果我像这样传递json：

{
      "num1":"324",
      "num2":123,
      "date":"2014-01-01"
    }

应用程序打印输出：

Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize value of type java.time.LocalDateTime from String "2014-01-01": Text '2014-01-01' could not be parsed at index 10
 at [Source: java.io.PushbackInputStream@1204f40f; line: 4, column: 8] (through reference chain: model.ClientInputMessage["date"]); nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Can not deserialize value of type java.time.LocalDateTime from String "2014-01-01": Text '2014-01-01' could not be parsed at index 10
 at [Source: java.io.PushbackInputStream@1204f40f; line: 4, column: 8] (through reference chain: model.ClientInputMessage["date"])

Answer 1

原始答案：

java中的LocalDateTime不接受“2014-01-01”作为有效日期字符串。

其他一些信息：

如果您实际上并不关心日期的类型（LocalDate，OffsetDate，ZonedDate，...），您可以将其设为TemporalAccessor，然后使用DateTimeFormatter::parseBest来解析日期。

<强> P.S。
字符串“2014-01-01T00：00：00”对LocalDateTime

有效

Answer 2

您可以简单地告诉反序列化器，即使输出为LocalDate，也应该是LocalDateTime，请注意为LocalDate设置替代设置器变体。

类似：

@JsonDeserialize(as = LocalDate.class)
@Past
private LocalDateTime date;

public void setDate(LocalDateTime input) {
    date = input;
}

public void setDate(LocalDate input) {
    date = input.atStartOfDay();
}

无法从String反序列化java.time.LocalDateTime类型的值

2 个答案: