我想将用户输入传回到表单中的字段内，这样他就不必再写一次了，因为他忘了填写一个字段。我尝试了this question的一些方法，但现在我收到了这个错误：
org.springframework.beans.NotReadablePropertyException: Invalid property 'email' of bean class [org.springframework.validation.support.BindingAwareModelMap]: Bean property 'email' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?
我的代码是
控制器
@RequestMapping(value = "/registration", method = RequestMethod.GET)
public ModelAndView getRegistration(Model model)
{
ModelAndView modelAndView;
if(model.containsAttribute("user")) {
// **************** Here is the exception ****************
modelAndView = new ModelAndView("registration", "command", model);
}
else {
modelAndView = new ModelAndView("registration", "command", new User());
modelAndView.addObject("sexValues", SexEnum.values());
}
//ModelAndView modelAndView = new ModelAndView("registration", "command", new User());
return modelAndView;
}
@RequestMapping(value = "/registration", method = RequestMethod.POST)
public String postRegistration(HttpServletRequest request, RedirectAttributes attr, @ModelAttribute("user") User user, ModelMap model)
{
if(!Objects.equals(user.getPassword(), user.getPasswordConfirmation())) {
model.addAttribute(ERROR_ATTRIBUTE, "Hesla se neshodují.");
return "redirect:/registration";
}
try {
userManager.register(user);
return "redirect:/";
}
catch (UserValidationException e) {
//***** I'm trying to pass user data to redirect ****
model.addAttribute(ERROR_ATTRIBUTE, e.getMessage());
attr.addFlashAttribute("user", user);
return "redirect:/registration";
}
}
Registration.jsp
<form:form class="px-2 py-1 form-border" method="post">
<div class="form-row">
<div class="form-group col-md-6">
<form:label class="col-form-label" for="email" path="email">E-mail:</form:label>
<form:input type="email" class="form-control" id="email" placeholder="E-mail" maxlength="50" path="email"/>
</div>
<div class="form-group col-md-6">
<form:label class="col-form-label" for="nickname" path="username">Přezdívka:</form:label>
<form:input type="text" class="form-control" id="nickname" placeholder="Přezdívka" maxlength="50" path="username"/>
</div>
</div>
<div class="form-row">
<div class="form-group text-center col-sm-12">
<input type="submit" class="btn btn-primary col-md-5" id="registration" value="Registrovat">
</div>
</div>
User.java
@Entity
@Table(name = "Users")
public class User extends BaseObject{
/** User's name */
private String username;
/** Hash of user's password */
private String passwordHash;
/** User's e-mail */
private String email;
/** User's first name */
private String firstName;
/** User's last name */
private String lastName;
/** User's date of birth */
@DateTimeFormat(pattern = "yyyy-MM-dd")
private Date dateOfBirth;
/** User's sex */
private SexEnum sex;
/** Users's password (in web form) */
private String password;
/** Users's password confirmation (in web form) */
private String password2;
/** Date of user's creation */
private Date dateOfCreation;
/**************************************************************
* Create actual date of user creation.
**************************************************************/
@PrePersist
protected void onCreate() {
dateOfCreation = new Date();
}
/**************************************************************
* New user constructor
*
* @param username User's username
* @param email User's e-mail
* @param firstName User's first name
* @param lastName User's last name
* @param dateOfBirth User's date of birth
* @param sex User's sex
**************************************************************/
public User(String username, String email, String firstName, String lastName, Date dateOfBirth, SexEnum sex) {
this.username = username;
this.email = email;
this.firstName = firstName;
this.lastName = lastName;
this.dateOfBirth = dateOfBirth;
this.sex = sex;
}
/**************************************************************
* Default user constructor
**************************************************************/
public User() {
}
public void validate() throws UserValidationException {
if(StringUtils.isBlank(email)) {
throw new UserValidationException("E-mail je povinný!");
}
if(StringUtils.isBlank(username)) {
throw new UserValidationException("Přezdívka je povinná!");
}
if(StringUtils.isBlank(firstName)) {
throw new UserValidationException("Jméno je povinné!");
}
if(StringUtils.isBlank(lastName)) {
throw new UserValidationException("Příjmení je povinné!");
}
if(StringUtils.isBlank(password)) {
throw new UserValidationException("Heslo je povinné!");
}
if(sex == null) {
throw new UserValidationException("Pohlaví je povinné!");
}
}
}
// plus getters and setters for every field
如果我打开页面registration，它将毫无例外地打开。但是，如果我发送带有一些空白字段的表单并且代码正在通过IF部分，我将获得异常。你能否告诉我如何以正确的方式处理表单中的传递值？