Question

我的Spring MVC出了问题。

@RequestMapping(value = "/novo", method = RequestMethod.GET)
public ModelAndView novoTimeSheet() {
    return new ModelAndView("timesheetcrud/novo", "timesheet", new TimeSheet());
}

我的TimeSheet班有：

@NotNull(message = "timesheet.cadastro.horainicio.obrigatorio")
@Temporal(TemporalType.TIME)
@Column(name = "INICIO", nullable = false)
private Date horaInicio;

@NotNull(message = "timesheet.cadastro.horafim.obrigatorio")
@Temporal(TemporalType.TIME)
@Column(name = "FIM", nullable = false)
private Date horaFim;

我的addTimeSheet：

@RequestMapping(value = "/addtimesheet", method = RequestMethod.POST)
public String addTimeSheet(@ModelAttribute("timesheet")TimeSheet timeSheet,
                         ModelMap model) {

在浏览器中，当我放置不相等的日期时，我有这个错误：

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 2 errors
Field error in object 'timesheet' on field 'horaFim': rejected value [lala]; 
codes [typeMismatch.timesheet.horaFim,typeMismatch.horaFim,typeMismatch.java.util.Date,typeMismatch]; 
arguments [
  org.springframework.context.support.DefaultMessageSourceResolvable: codes [timesheet.horaFim,horaFim]; 
  arguments []; 
  default message [horaFim]
]; 
default message [
  Failed to convert property value of type 'java.lang.String' to required type 'java.util.Date' for property 'horaFim'; 
  nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type java.lang.String to type @javax.validation.constraints.NotNull @javax.persistence.Temporal @javax.persistence.Column java.util.Date for value 'lala'; 
  nested exception is java.lang.IllegalArgumentException
]
Field error in object 'timesheet' on field 'horaInicio': rejected value [teste]; 
codes [typeMismatch.timesheet.horaInicio,typeMismatch.horaInicio,typeMismatch.java.util.Date,typeMismatch]; 
arguments [
  org.springframework.context.support.DefaultMessageSourceResolvable: codes [timesheet.horaInicio,horaInicio]; 
  arguments []; 
  default message [horaInicio]
]; 
default message [
  Failed to convert property value of type 'java.lang.String' to required type 'java.util.Date' for property 'horaInicio'; 
  nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type java.lang.String to type @javax.validation.constraints.NotNull @javax.persistence.Temporal @javax.persistence.Column java.util.Date for value 'teste'; 
  nested exception is java.lang.IllegalArgumentException
]

我该怎么办？期待Date，但我将String放在字段中，我想在我的控制器之前验证。

Answer 1

您需要为Controller添加一些绑定，例如：

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

Answer 2

试试这个：

@RequestMapping(value = "/addtimesheet", method = RequestMethod.POST)
public String addTimeSheet(@ModelAttribute("timesheet") TimeSheet timeSheet,
                           BindingResult bindingResult,
                           ModelMap model) {
  if (bindingResult.hasErrors()) {
    // validation error (binding error) handling code goes here.
  }
}

确保在timeSheet参数后面右边放置bindingResult参数。

http://static.springsource.org/spring/docs/3.1.x/javadoc-api/org/springframework/web/bind/annotation/RequestMapping.htm

Handler methods which are annotated with this annotation are allowed to 
have very flexible signatures. They may have arguments of the following types, 
in arbitrary order (except for validation results, which need to follow right 
after the corresponding command object, if desired)

spring mvc中的转换数据类型

2 个答案: