Question

我的控制器中的Save方法有问题

我有一张带旅行的表格，可选择旅行我尝试做的是，如果travel2所有字段都填满，那么保存travel1 + travel2 否则只有travel1

但是日志说我不能，因为它在注释之前的某个地方失败了

编辑：如果未填写日期，则会崩溃

#2result:org.springframework.validation.BeanPropertyBindingResult: 1 errors
Field error in object 'FormModel' on field 'travel2.traveldate': rejected value []; codes [typeMismatch.FormModel.travel2.traveldate,typeMismatch.travel2.traveldate,typeMismatch.traveldate,typeMismatch.java.util.Date,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [FormModel.travel2.traveldate,travel2.traveldate]; arguments []; default message [travel2.traveldate]]; default message [Failed to convert property value of type 'java.lang.String' to required type 'java.util.Date' for property 'travel2.traveldate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [java.util.Date] for value ''; nested exception is java.lang.IllegalArgumentException]

那么如何在不设置DB允许的NULLABLE的情况下更改行为？

@RequestMapping(value = "/users", method = RequestMethod.POST)
public String saveOrUpdateUser(@ModelAttribute("FormModel") @Validated FormModel formmodel, 
        BindingResult result, Model model, final RedirectAttributes redirectAttributes) {....
        if (result.hasErrors()) {
System.out.println("#2result:"+result);
//IF ...(formmodel.getTravel2().allFilled())
        //travelService.save(formmodel.getTravel(),formmodel.getTravel2());

formmodel wrapperclass：

public class FormModel {
    private User user;
    private Costcenter costcenter;
    private Travel travel;
    private Travel travel2;...

形式：

<form:hidden path="travel2.t_id" />   
            <spring:bind path="travel2.traveldate">
                <div class="form-group has-feedback${status.error ? 'has-error' : ''}">
                    <label class="col-md-2 control-label">Travel Date</label>
                    <div class="col-md-10">
                        <form:input path="travel2.traveldate" class="form-control"
                            id="datepicker2" type="text" placeholder="Traveldate" />
                        <span class="glyphicon glyphicon-calendar form-control-feedback"></span>
                        <form:errors path="travel2.traveldate" class="control-label" />
                    </div>
                </div>
            </spring:bind>

编辑：也许我可以查看“结果” 并做一些类似

的事情

if(no errors)-> keep going
elseif(error with date) //<<<<catch stuff here, if date not filled... result.getFieldError().getRejectedValue()==""
else show errorpage

edit2：旅行课

public class Travel {
Integer t_id;

Date traveldate;    
Time starttime;
String start;
String destination;

public Integer gett_id() {
    return t_id;
}

public void sett_id(Integer t_id) {
    this.t_id = t_id;
}...
public boolean allFilled(){
    if (traveldate!=null && starttime!= null 
        && start !=null && start !=""
        && destination != null && destination != ""){
    return true;
    } else {
        return false;
    }

}....

Answer 1

在错误日志中，明确提到Travel类中的属性travelDate类型不匹配。您可能在域类中使用日期类型，但是当您在UI页面中填充相同字段的值时，它将以String格式发布值。尝试使用以下参考更改travelDate的getter和setter方法的代码。

private Date createdOn;

public String getCreatedOn() {
    String dateInString=null;
    if(createdOn!=null){
        DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
        dateInString = df.format(createdOn);
    }
    return dateInString;
}
public void setCreatedOn(String createdOn) {
    try {

        SimpleDateFormat sdf=new SimpleDateFormat("dd/MM/yyyy");
        sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
        this.createdOn = sdf.parse(createdOn);
    } catch(ParseException e) {
        this.createdOn=null;  
    }        
}

如果这似乎不起作用，请发布UI页面的代码。

改变弹簧映射行为

1 个答案: