java - 配置 Jackson 而不是使用 DateTimeFormat.ISO.DATE - 不工作

Question

我想在每次请求日期时使用 DateTimeFormat.ISO.DATE 配置 Jackson，例如:

@RequestMapping(value = "income")
  public ResponseEntity calculateIncome(
      @RequestParam(value = "companyName") String companyName,
      @DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
      @RequestParam(value = "startDate") LocalDate startDate,
      @DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
      @RequestParam(value = "endDate") LocalDate endDate
  ) 

我已经尝试在 JacksonConfig 中设置它

mapper.enable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);

或

mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);

还有

mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);

或

mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, true);

即使在 application.properties 中我也尝试过

spring.jackson.serialization.write_dates_as_timestamps=true

我正在使用 spring-boot 机智的依赖项

 <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <version>1.5.10.RELEASE</version>
    </dependency>
<dependency>
      <groupId>com.fasterxml.jackson.datatype</groupId>
      <artifactId>jackson-datatype-jsr310</artifactId>
      <version>${jackson.version}</version>
    </dependency>

我只是不想一遍又一遍地重复相同的@DataTimeFormat但没有它，我仍然会遇到错误:

在 IntelJ 中

2018-03-01 15:35:05.539 WARN 8168 --- [nio-8080-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Failed to bind request element: org.springframework.web.method.annotation.MethodArgumentTypeMismatchException: Failed to convert value of type 'java.lang.String' to required type 'java.time.LocalDate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@org.springframework.web.bind.annotation.RequestParam java.time.LocalDate] for value '2018-02-28'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [2018-02-28]

postman

{
    "timestamp": 1519914905555,
    "status": 400,
    "error": "Bad Request",
    "exception": "org.springframework.web.method.annotation.MethodArgumentTypeMismatchException",
    "message": "Failed to convert value of type 'java.lang.String' to required type 'java.time.LocalDate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@org.springframework.web.bind.annotation.RequestParam java.time.LocalDate] for value '2018-02-28'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [2018-02-28]",
    "path": "/incVat"
}

或

{
    "timestamp": "2018-03-01T15:36:44.823+0000",
    "status": 400,
    "error": "Bad Request",
    "exception": "org.springframework.web.method.annotation.MethodArgumentTypeMismatchException",
    "message": "Failed to convert value of type 'java.lang.String' to required type 'java.time.LocalDate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@org.springframework.web.bind.annotation.RequestParam java.time.LocalDate] for value '2018-02-28'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [2018-02-28]",
    "path": "/incVat"
}

Answer 1

解决方案:我找到了解决方案 here这都是关于 LocalDate 的自定义编辑器和 Formatter

的实现

@Bean
  public Formatter<LocalDate> localDateFormatter() {
    return new Formatter<LocalDate>() {
      @Override
      public LocalDate parse(String text, Locale locale) throws ParseException {
        return LocalDate.parse(text, DateTimeFormatter.ISO_DATE);
      }

      @Override
      public String print(LocalDate object, Locale locale) {
        return DateTimeFormatter.ISO_DATE.format(object);
      }
    };
  }