当前逻辑将检查BindingResult是否有错误并在jsp中显示数据和错误。 需要的逻辑是检查每行的错误并仅显示包含验证错误的行，并更新没有验证错误的行。 @Autowired private IncidentExtractStgService incidentExtractStgService;
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
this.DataContext = new List<String>{ "Item 1", "Item 2", "Item 3"};
}
private string ListViewItemString;
private void ChoiceA_Click(object sender, RoutedEventArgs e)
{
// What was clicked?
var clickedItem = ListViewItemString;
}
private void ListView_Opening(object sender, object e)
{
ListViewItemString = ((sender as MenuFlyout)?.Target as ListViewItem)?.Content as string;
}
}
下面的代码片段将检查模型是否包含属性＆＃34; incidetsForm＆＃34;如果是，则将相同的内容发送到example.jsp，而example.jsp将显示数据和验证错误。
function implementsInterface(object: Object, target: Interface) {
const objClass: Class = object.constructor && object.constructor.getClass();
if (objClass && objClass.implements) {
let found = false;
for (let base of objClass.implements) {
let found = interfaceExtends(base, target);
if (found) {
return true;
}
}
}
return false;
}
// recursive interface inheritance check
function interfaceExtends(i: Interface, target: Interface) {
if (i === target) {
return true;
}
if (i.extends) {
let found = false;
for (let base of i.extends) {
// do a recursive check on base interface...
found = interfaceExtends(base, target);
if (found) {
return true;
}
}
}
return false;
}
Example.jsp代码段
@RequestMapping(value = "/validatingIncidentList", method = RequestMethod.POST)
public String ValidateIncidentList( @Valid @ModelAttribute("incidentsForm") IncidentsForm incidentsForm,
BindingResult bindingResult,RedirectAttributes redirectAttributes) {
if (bindingResult.hasErrors()) {
for(ObjectError error: bindingResult.getAllErrors()){
System.out.println(error);
}
redirectAttributes.addFlashAttribute("org.springframework.validation.BindingResult.incidentsForm", bindingResult);
redirectAttributes.addFlashAttribute("incidentsForm", incidentsForm);
return "redirect:/validateIncidentList";
}
else
{
for(IncidentExtractStg ie : incidentsForm.getIncidents()) {
ie.setValidated(1);
incidentExtractStgService.update(ie);
System.out.println(ie.getNumber()+" "+ie.getWaitTime());
}
return "redirect:/validateIncidentList";
}
IncidentsForm.java：
@RequestMapping(value = "/validateIncidentList", method = RequestMethod.GET)
public String incidentList(Model model) {
if (!model.containsAttribute("incidentsForm")) {
List<IncidentExtractStg> incidents = incidentExtractStgDao.validateList();
incidentsForm.setIncidents(incidents);
model.addAttribute("incidentsForm", incidentsForm);
return "example";
}
model.addAttribute("errormessage","Please Check the Validation Errors column for Errors");
return "example";
}
IncidentExtractStg.java片段
<c:forEach var="ie" items="${incidentsForm.incidents}" varStatus="status">
<tr>
<td><form:input path="incidents[${status.index}].id" value="${ie.id}" readonly ="true"/></td>
<td><form:errors path="incidents[${status.index}].id" cssClass="error" /></td>
<td><form:input path="incidents[${status.index}].number" value="${ie.number}"/></td>
<td><form:errors path="incidents[${status.index}].number" cssClass="error" /></td>
</tr>
答案 0 :(得分：1)
首先，如果我是你，我将提取服务层内的所有逻辑。要继续，您可以创建一个接口IncidentService和它自己的具体实现IncidentServiceImpl，您可以在其中安全地处理您的需求。控制器肯定没有完成所有事情。
那么，您的需求是什么？ ＆＃34;检查每行的错误并仅显示包含验证错误的行，并更新没有验证错误的行＆＃34;
服务层内的方法可能是这样的：
public void handleErrors(IncidentsForm incidentsForm, BindingResult bindingResult){
List<String> fieldsInErrorState = new ArrayList<String>(10);
if (bindingResult.hasErrors()) { //
Map<String, Object> bindingModel = bindingResult.getModel();
for (Map.Entry<String, Object> entry : bindingModel.entrySet()) {
String key = entry.getKey();
//Object value = entry.getValue(); you don't need to parse that unless you want specific domain model handlers to run
//you need to store the key as a form field which is in error state
fieldsInErrorState.add(key);
//you already have all the stuff to parse and display errors in your JSP
//thanksfully to bindingResult and JSTL tags.
}
ContactMessageForm cmForm2 = new ContactMessageForm();
// get the list of the fields inside your form
Field[] declaredFields = ContactMessageForm.class.getDeclaredFields();
for (Field field : declaredFields) {
if (!fieldsInErrorState.contains(field.getName())) {
if (field.getName().equalsIgnoreCase("firstname")) {
cmForm2.setFirstname(contactMessageForm.getFirstname());
}
if (field.getName().equalsIgnoreCase("lastname")) {
cmForm2.setLastname(contactMessageForm.getLastname());
}
//etc for each properties of your form object.
}
// then store your dbmodel object
// BUT i think you must be carefull to your data integrity... It is maybe not safe to save an object like that with bypassing some stuff...
// Your form was built like that maybe for a good reason looking at your objects graph.
// If your form is too big, then split it in small parts, it will be much easy to handle, to update, and to work with daily.
}
}
}
当然，您需要自定义该代码，不要忘记将throws IntrospectionException添加到您的服务方法中，并且您处于良好的状态。
干杯！
答案 1 :(得分：0)
由于逻辑是仅显示包含验证错误的行，因此会创建一个新的List来存储至少有一个验证错误的行。
创建一个新的BindingResult来将错误存储在新List的索引中。（如果没有这样做，那么错误信息将不会显示在显示的行上）。
以下逻辑是针对行的每个字段检查字段错误，并且从jsp可以看到归档名称具有“事件[$ {status.index}]。id”。 - 计数器i获取行数 - 计数器j用于设置BindingResult的索引。
join例如：如果在第30行，事件[30] .number字段有验证错误。然后i = 30并且计数> 0且j = 0。
因此整个行事件[30]将保存在新初始化列表的索引0处，并且bindingresult也将在索引0处添加。如果J未被设置为result2并且使用了bindingresult，那么它将仍然指向索引30，并且不会对现在存储在索引0的字段显示错误消息。
现在，这个更新的IncidentsForm和result2将被发送到jsp页面，该页面将仅显示那些具有验证错误的行以及各自的错误消息。