I use Spring Boot and included jackson-datatype-jsr310 with Maven:
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.7.3</version>
</dependency>
When I try to use a RequestParam with a Java 8 Date/Time type,
@GetMapping("/test")
public Page<User> get(
@RequestParam(value = "start", required = false)
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime start) {
//...
}
and test it with this URL:
/test?start=2016-10-8T00:00
I get the following error:
{
"timestamp": 1477528408379,
"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.LocalDateTime]; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@org.springframework.web.bind.annotation.RequestParam @org.springframework.format.annotation.DateTimeFormat java.time.LocalDateTime] for value '2016-10-8T00:00'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [2016-10-8T00:00]",
"path": "/test"
}
TL;DR - you can capture it as a string with just @RequestParam, or you can have Spring additionally parse the string into a java date / time class via @DateTimeFormat on the parameter as well.
the @RequestParam is enough to grab the date you supply after the = sign, however, it comes into the method as a String. That is why it is throwing the cast exception.
There are a few ways to achieve this:
- parse the date yourself, grabbing the value as a string.
@GetMapping("/test")
public Page<User> get(@RequestParam(value="start", required = false) String start){
//Create a DateTimeFormatter with your required format:
DateTimeFormatter dateTimeFormat =
new DateTimeFormatter(DateTimeFormatter.BASIC_ISO_DATE);
//Next parse the date from the @RequestParam, specifying the TO type as
a TemporalQuery:
LocalDateTime date = dateTimeFormat.parse(start, LocalDateTime::from);
//Do the rest of your code...
}
- Leverage Spring's ability to automatically parse and expect date formats:
@GetMapping("/test")
public void processDateTime(@RequestParam("start")
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME)
LocalDateTime date) {
// The rest of your code (Spring already parsed the date).
}
You did everything correct :) . Here is an example that shows exactly what you are doing. Just Annotate your RequestParam with @DateTimeFormat. There is no need for special GenericConversionService or manual conversion in the controller. This blog post writes about it.
@RestController
@RequestMapping("/api/datetime/")
final class DateTimeController {
@RequestMapping(value = "datetime", method = RequestMethod.POST)
public void processDateTime(@RequestParam("datetime")
@DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime dateAndTime) {
//Do stuff
}
}
I guess you had an issue with the format. On my setup everything works well.
Like I put in the comment, you could also use this solution in the signature method: @RequestParam @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime start
I found workaround here.
Spring/Spring Boot only supports the date/date-time format in BODY parameters.
The following configuration class adds support for date/date-time in QUERY STRING (request parameters):
// Since Spring Framwork 5.0 & Java 8+
@Configuration
public class DateTimeFormatConfiguration implements WebMvcConfigurer {
@Override
public void addFormatters(FormatterRegistry registry) {
DateTimeFormatterRegistrar registrar = new DateTimeFormatterRegistrar();
registrar.setUseIsoFormat(true);
registrar.registerFormatters(registry);
}
}
respectively:
// Until Spring Framwork 4.+
@Configuration
public class DateTimeFormatConfiguration extends WebMvcConfigurerAdapter {
@Override
public void addFormatters(FormatterRegistry registry) {
DateTimeFormatterRegistrar registrar = new DateTimeFormatterRegistrar();
registrar.setUseIsoFormat(true);
registrar.registerFormatters(registry);
}
}
It works even if you bind multiple request parameters to some class (@DateTimeFormat annotation helpless in this case):
public class ReportRequest {
private LocalDate from;
private LocalDate to;
public LocalDate getFrom() {
return from;
}
public void setFrom(LocalDate from) {
this.from = from;
}
public LocalDate getTo() {
return to;
}
public void setTo(LocalDate to) {
this.to = to;
}
}
// ...
@GetMapping("/api/report")
public void getReport(ReportRequest request) {
// ...
I ran into the same problem and found my solution here (without using Annotations)
...you must at least properly register a string to [LocalDateTime] Converter in your context, so that Spring can use it to automatically do this for you every time you give a String as input and expect a [LocalDateTime]. (A big number of converters are already implemented by Spring and contained in the core.convert.support package, but none involves a [LocalDateTime] conversion)
So in your case you would do this:
public class StringToLocalDateTimeConverter implements Converter<String, LocalDateTime> {
public LocalDateTime convert(String source) {
DateTimeFormatter formatter = DateTimeFormatter.BASIC_ISO_DATE;
return LocalDateTime.parse(source, formatter);
}
}
and then just register your bean:
<bean class="com.mycompany.mypackage.StringToLocalDateTimeConverter"/>
With Annotations
add it to your ConversionService:
@Component
public class SomeAmazingConversionService extends GenericConversionService {
public SomeAmazingConversionService() {
addConverter(new StringToLocalDateTimeConverter());
}
}
and finally you would then @Autowire in your ConversionService:
@Autowired
private SomeAmazingConversionService someAmazingConversionService;
You can read more about conversions with spring (and formatting) on this site. Be forewarned it has a ton of ads, but I definitely found it to be a useful site and a good intro to the topic.
The answers above didn't work for me, but I blundered on to one which did here: https://blog.codecentric.de/en/2017/08/parsing-of-localdate-query-parameters-in-spring-boot/ The winning snippet was the ControllerAdvice annotation, which has the advantage of applying this fix across all your controllers:
@ControllerAdvice
public class LocalDateTimeControllerAdvice
{
@InitBinder
public void initBinder( WebDataBinder binder )
{
binder.registerCustomEditor( LocalDateTime.class, new PropertyEditorSupport()
{
@Override
public void setAsText( String text ) throws IllegalArgumentException
{
LocalDateTime.parse( text, DateTimeFormatter.ISO_DATE_TIME );
}
} );
}
}
Following works well with Spring Boot 2.1.6:
Controller
@Slf4j
@RestController
public class RequestController {
@GetMapping
public String test(RequestParameter param) {
log.info("Called services with parameter: " + param);
LocalDateTime dateTime = param.getCreated().plus(10, ChronoUnit.YEARS);
LocalDate date = param.getCreatedDate().plus(10, ChronoUnit.YEARS);
String result = "DATE_TIME: " + dateTime + "<br /> DATE: " + date;
return result;
}
@PostMapping
public LocalDate post(@RequestBody PostBody body) {
log.info("Posted body: " + body);
return body.getDate().plus(10, ChronoUnit.YEARS);
}
}
Dto classes:
@Value
public class RequestParameter {
@DateTimeFormat(iso = DATE_TIME)
LocalDateTime created;
@DateTimeFormat(iso = DATE)
LocalDate createdDate;
}
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class PostBody {
LocalDate date;
}
Test class:
@RunWith(SpringRunner.class)
@WebMvcTest(RequestController.class)
public class RequestControllerTest {
@Autowired MockMvc mvc;
@Autowired ObjectMapper mapper;
@Test
public void testWsCall() throws Exception {
String pDate = "2019-05-01";
String pDateTime = pDate + "T23:10:01";
String eDateTime = "2029-05-01T23:10:01";
MvcResult result = mvc.perform(MockMvcRequestBuilders.get("")
.param("created", pDateTime)
.param("createdDate", pDate))
.andExpect(status().isOk())
.andReturn();
String payload = result.getResponse().getContentAsString();
assertThat(payload).contains(eDateTime);
}
@Test
public void testMapper() throws Exception {
String pDate = "2019-05-01";
String eDate = "2029-05-01";
String pDateTime = pDate + "T23:10:01";
String eDateTime = eDate + "T23:10:01";
MvcResult result = mvc.perform(MockMvcRequestBuilders.get("")
.param("created", pDateTime)
.param("createdDate", pDate)
)
.andExpect(status().isOk())
.andReturn();
String payload = result.getResponse().getContentAsString();
assertThat(payload).contains(eDate).contains(eDateTime);
}
@Test
public void testPost() throws Exception {
LocalDate testDate = LocalDate.of(2015, Month.JANUARY, 1);
PostBody body = PostBody.builder().date(testDate).build();
String request = mapper.writeValueAsString(body);
MvcResult result = mvc.perform(MockMvcRequestBuilders.post("")
.content(request).contentType(APPLICATION_JSON_VALUE)
)
.andExpect(status().isOk())
.andReturn();
ObjectReader reader = mapper.reader().forType(LocalDate.class);
LocalDate payload = reader.readValue(result.getResponse().getContentAsString());
assertThat(payload).isEqualTo(testDate.plus(10, ChronoUnit.YEARS));
}
}
You can add to config, this solution does work with optional as well as with non-optional parameters.
@Bean
public Formatter<LocalDate> localDateFormatter() {
return new Formatter<>() {
@Override
public LocalDate parse(String text, Locale locale) {
return LocalDate.parse(text, DateTimeFormatter.ISO_DATE);
}
@Override
public String print(LocalDate object, Locale locale) {
return DateTimeFormatter.ISO_DATE.format(object);
}
};
}
@Bean
public Formatter<LocalDateTime> localDateTimeFormatter() {
return new Formatter<>() {
@Override
public LocalDateTime parse(String text, Locale locale) {
return LocalDateTime.parse(text, DateTimeFormatter.ISO_DATE_TIME);
}
@Override
public String print(LocalDateTime object, Locale locale) {
return DateTimeFormatter.ISO_DATE_TIME.format(object);
}
};
}
来源：https://stackoverflow.com/questions/40274353/how-to-use-localdatetime-requestparam-in-spring-i-get-failed-to-convert-string