关于 Apache Wicket 的问题:我有一个包含多个文本输入字段的表单。在我添加 DateTextField 之前它工作正常。重写方法 onSubmit() 不再被调用。我查看了 Wicket 示例，但看不出我的代码有什么重大区别。
html 代码如下:
<html xmlns:wicket="http://wicket.apache.org">
<head>
<title>Students</title>
</head>
<body>
<div class="container">
<form id="createStudent" wicket:id="createStudent">
<div>
<span id="lastNameLabel"><wicket:message key="lastNameLabel" /></span>
<input id="lastName" wicket:id="lastName" type="text" />
</div>
<div>
<span id="firstNameLabel"><wicket:message key="firstNameLabel" /></span>
<input id="firstName" wicket:id="firstName" type="text" />
</div>
<div>
<span id="dateOfBirthLabel"><wicket:message key="dateOfBirthLabel" /></span>
<input id="dateOfBirth" wicket:id="dateOfBirth" type="text" />
</div>
<div>
<input id="submit" type="submit" value="" wicket:message="value:submitLabel"/>
</div>
</form>
</div>
</body>
</html>对应的java文件:
package it.foo;
import java.util.Locale;
import org.apache.wicket.Session;
import org.apache.wicket.datetime.StyleDateConverter;
import org.apache.wicket.datetime.markup.html.form.DateTextField;
import org.apache.wicket.markup.html.form.Button;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.model.CompoundPropertyModel;
import org.apache.wicket.spring.injection.annot.SpringBean;
import org.joda.time.DateTime;
public class CreateStudentForm extends Form<Student> {
private static final long serialVersionUID = 1L;
private String lastName;
private String firstName;
private DateTime dateOfBirth;
@SpringBean
StudentDao studentDao;
public CreateStudentForm(String id) {
super(id);
setDefaultModel(new CompoundPropertyModel<>(this));
add(new TextField<String>("lastName"));
add(new TextField<String>("firstName"));
final DateTextField dateOfBirthField = new DateTextField("dateOfBirth", new StyleDateConverter("S-", true)) {
private static final long serialVersionUID = 1L;
@Override
public Locale getLocale() {
return Session.get().getLocale();
}
};
dateOfBirthField.setType(DateTime.class);
add(dateOfBirthField);
}
@Override
protected void onSubmit() {
// does not get called as soon as the DateTextField is present. Works fine otherwise.
Student student = new Student(this.lastName, this.firstName, this.dateOfBirth);
studentDao.store(student);
setResponsePage(StudentsPage.class);
}
}
我查看了浏览器中呈现的 html。如果 dateTextField 不存在，则如下所示:
<html>
<head>
<title>Students</title>
</head>
<body>
<div class="container">
<form id="createStudent" method="post" action="./?2-1.IFormSubmitListener-createStudent"><div style="width:0px;height:0px;position:absolute;left:-100px;top:-100px;overflow:hidden"><input type="hidden" name="createStudent_hf_0" id="createStudent_hf_0" /></div>
<div>
<span id="lastNameLabel">Nachname: </span>
<input id="lastName" type="text" value="" name="lastName"/>
</div>
<div>
<span id="firstNameLabel">Vorname:</span>
<input id="firstName" type="text" value="" name="firstName"/>
</div>
<!-- <div>
<span id="dateOfBirthLabel"><wicket:message key="dateOfBirthLabel" /></span>
<input id="dateOfBirth" wicket:id="dateOfBirth" type="text" />
</div> -->
<div>
<input id="submit" type="submit" value="Schüler anlegen"/>
</div>
</form>
</div>
</body>
</html>一旦存在 dateTextField，表单就会通过 JavaScript 调用进行额外的划分。
<html>
<head>
<title>Students</title>
</head>
<body>
<div class="container">
<form id="createStudent" method="post" action="./?6-7.IFormSubmitListener-createStudent"><div style="width:0px;height:0px;position:absolute;left:-100px;top:-100px;overflow:hidden"><input type="hidden" name="createStudent_hf_0" id="createStudent_hf_0" /></div><div style="width:0px;height:0px;position:absolute;left:-100px;top:-100px;overflow:hidden"><input type="text" tabindex="-1" autocomplete="off"/><input type="submit" tabindex="-1" name="p::submit" onclick=" var b=document.getElementById('submit'); if (b!=null&&b.onclick!=null&&typeof(b.onclick) != 'undefined') { var r = Wicket.bind(b.onclick, b)(); if (r != false) b.click(); } else { b.click(); }; return false;" /></div>
<div>
<span id="lastNameLabel">Nachname: </span>
<input id="lastName" type="text" value="Matthias" name="lastName"/>
</div>
<div>
<span id="firstNameLabel">Vorname:</span>
<input id="firstName" type="text" value="Tonhäuser" name="firstName"/>
</div>
<div>
<span id="dateOfBirthLabel">Geburtsdatum: </span>
<input id="dateOfBirth" type="text" value="06.09.17" name="dateOfBirth"/>
</div>
<div>
<input id="submit" type="submit" value="Schüler anlegen" name="p::submit"/>
</div>
</form>
</div>
</body>
</html>我不太明白为什么突然要增加部门。我的猜测是 JavaScript 调用不起作用。
谢谢。
最佳答案
onSubmit() 方法未调用可能是因为 dateField 值的验证不正确。您必须将反馈面板添加到您的页面并检查。
关于java - 为什么当存在 DateTimeField 时不调用表单的 onSubmit 方法？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46215383/