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Failed to Instantiate Java 8 Date and Time class if perform direct parameter binding [SPR-13362] #17946

Failed to Instantiate Java 8 Date and Time class if perform direct parameter binding [SPR-13362] #17946

in: web Issues in web modules (web, webmvc, webflux, websocket) status: declined A suggestion or change that we don’t feel we should currently apply

Comments

Simon Wong opened SPR-13362 and commented

Failed to Instantiate Java 8 Date and Time class if perform direct parameter binding

@RestController @RequestMapping("some_path") public class MyController < @RequestMapping(value = "/my_sub_path", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE) public void test(@DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate myDate) < // throws org.springframework.beans.BeanInstantiationException: Failed to instantiate [java.time.LocalDate]: No default constructor found; >> 

There are several workaround with their own limitations

@RestController @RequestMapping("some_path") public class MyController < @ModelAttribute LocalDate myDate() < return LocalDate.now(); >@RequestMapping(value = "/my_sub_path", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE) public void test(@DateTimeFormat(iso = DateTimeFormat.ISO.DATE) @ModelAttribute LocalDate myDate) < // It could instantiate the LocalDate class, but it WILL NOT do any data binding from web parameter also called "myDate" >> 

@RestController @RequestMapping("some_path") public class MyController < @ModelAttribute LocalDate myDate() < return LocalDate.now(); >@RequestMapping(value = "/my_sub_path", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE) public void test(@DateTimeFormat(iso = DateTimeFormat.ISO.DATE) @RequestParam @ModelAttribute LocalDate myDate) < // Works perfectly if explicit @RequestParam or @RequestParam("myDate") annotation is provided >> 

@RestController @RequestMapping("some_path") public class MyController < @RequestMapping(value = "/my_sub_path", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE) public void test(@DateTimeFormat(iso = DateTimeFormat.ISO.DATE) @RequestParam LocalDate myDate) < // This will also create a LocalDate model attribute impliclity and works perfectly!! >> 

Affects: 4.1.2

The text was updated successfully, but these errors were encountered:

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Spring Boot + LocalDate: «Нет основного или конструктора по умолчанию»

Это, конечно, правильно, но, насколько я понимаю, не имеет значения, потому что, согласно документации: «[. ] аннотация @DateTimeFormat должна работать с java.time на Java 8 и Spring 4.» Метод контроллера:

@PostMapping("/users") public String register(String user, String pw, @DateTimeFormat(iso=DateTimeFormat.ISO.DATE) LocalDate beginning) < MyUser myUser = MyUser.create(user,pw); MyUser.setEnabled(beginning); repo.register(myUser); return "redirect:/users/"+user; >

 
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Spring Boot + LocalDate: «Нет основного или конструктора по умолчанию»

Я создал простую форму с для приложения Spring Boot. Я бы хотел, чтобы это превратилось в LocalDate в контроллере. Я получаю ошибку:

Fri Aug 17 15:32:01 CEST 2018 There was an unexpected error (type=Internal Server Error, status=500). No primary or default constructor found for class java.time.LocalDate 

Это, безусловно, правильно, но — насколько я понимаю — не должно иметь значения, потому что, согласно документации: «[. ] @DateTimeFormat аннотация должна работать с java.time на Java 8 и Spring 4.»

@PostMapping("/users") public String register(String user, String pw, @DateTimeFormat(iso=DateTimeFormat.ISO.DATE) LocalDate beginning) < MyUser myUser = MyUser.create(user,pw); MyUser.setEnabled(beginning); repo.register(myUser); return "redirect:/users/"+user; >

 
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    org.springframework.boot spring-boot-dependencies 2.0.4.RELEASE pom import     org.springframework.boot spring-boot-starter-thymeleaf  org.springframework.boot spring-boot-starter-web  . 1.8  

     
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Neuen Benutzer Registrieren
 
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