How to use LocalDateTime RequestParam in Spring? I get “Failed to convert String to LocalDateTime”

Question

I use Spring Boot and included jackson-datatype-jsr310 with Maven:

    com.fasterxml.jackson.datatype

        

Answer 1

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

Answer 2

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 );
            }
        } );
    }
}

Answer 3

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);
            }
        };
    }

Answer 4

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));
    }

}