使用Spring Mvc Rest Service的@DateTimeFormat(pattern ="yyyy-MM-dd")给出"错误400请求语法不正确"

Question

我不能让这个工作:

@RequestMapping(value = "/people", method = RequestMethod.GET, produces = "application/json")
    public @ResponseBody
    List<IPerson> searchPerson(@RequestParam(value = "birthDay", required = false) @DateTimeFormat(pattern="yyyy-MM-dd") Date birthDay) {

随请求:

http://localhost:8080/rest/people?birthDay=2014-05-25

错误总是:

"HTTP状态400 - 客户端发送的请求在语法上不正确".

我找不到任何资源能给我一个明确的答案/指南来理解潜在的问题......有人可以帮助我吗？谢谢!

编辑: 例外是:

Caused by: 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.util.Date for value '2010-10-10'; nested exception is java.lang.IllegalArgumentException
    at org.springframework.core.convert.support.ObjectToObjectConverter.convert(ObjectToObjectConverter.java:78)
    at org.springframework.core.convert.support.ConversionUtils.invokeConverter(ConversionUtils.java:35)
    at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:168)
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:161)
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:93)
    at org.springframework.beans.TypeConverterSupport.doConvert(TypeConverterSupport.java:61)

... 40 more
Caused by: java.lang.IllegalArgumentException
    at java.util.Date.parse(Date.java:615)
    at java.util.Date.<init>(Date.java:272)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at org.springframework.core.convert.support.ObjectToObjectConverter.convert(ObjectToObjectConverter.java:73)
    ... 45 more

Answer 1

最后我找到了解决方案，也许对其他有同样问题的人有用。只需将此方法添加到控制器即可：

@InitBinder
public void initBinder(WebDataBinder binder) {
    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
    dateFormat.setLenient(false);
    binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, false));
}

就在文档中：http://docs.spring.io/spring/docs/3.1.x/spring-framework-reference/htmlsingle/spring-framework-reference.html#mvc-ann-webdatabinder

但仍然不明白为什么 @DateTimeFormat(pattern="yyyy-MM-dd") 不起作用...使用这个解决方案不需要 DateTimeFormat，所以我像其他人一样注释了参数：

@RequestParam(required = false) Date birthDay