我正在研究使用Spring Boot，Hibernate和thymeleaf的java web应用程序。目前，我正在尝试为我的应用程序实施注册过程，而且我遇到了实体类的问题。
User @Entity clas的一部分
@Column(name = "aktywny")
private boolean enabled;
@Column(name = "token")
private String confirmationToken;
public boolean getEnabled() {
return enabled;
}
public void setEnabled(boolean value) {
this.enabled = value;
}
请求方法
@RequestMapping(value = "/register", method = RequestMethod.POST)
public ModelAndView processRegistrationForm(Model model, ModelAndView modelAndView, @Valid User user, BindingResult bindingResult, @RequestParam Map requestParams, RedirectAttributes redir, HttpServletRequest httpServletRequest){
//Lookup user in db by email
User userExist = userService.findByEmail(user.getEmail());
System.out.println(userExist);
if( userExist != null){
model.addAttribute("alreadyRegisteredMessage", "Użytkownik o podanym adresie e-mail już istnieje");
bindingResult.reject("email");
}
if(bindingResult.hasErrors()){
modelAndView.setViewName("home");
}else {
//set disabled until confirmation link clicked
user.setEnabled(false);
//generate string token
user.setConfirmationToken(UUID.randomUUID().toString());
Zxcvbn passwordCheck = new Zxcvbn();
Strength strength = passwordCheck.measure(requestParams.get("password").toString());
if(strength.getScore() < 3) {
bindingResult.reject("password");
redir.addFlashAttribute("errorMessage", "Twoje hasło jest zbyt słabe, wybierz silniejsze");
modelAndView.setViewName("redirect: confirm?token=" + requestParams.get("token"));
System.out.println(requestParams.get("token"));
// Set new password
user.setPassword(bCryptPasswordEncoder.encode(requestParams.get("password").toString()));
}
userService.saveUser(user);
String appUrl = httpServletRequest.getScheme() + "://" + httpServletRequest.getServerName();
SimpleMailMessage registrationEmail = new SimpleMailMessage();
registrationEmail.setTo(user.getEmail());
registrationEmail.setSubject("Potwierdzenie rejestracji");
registrationEmail.setText("Aby dokończyć rejestrację, kliknij w poniższy link: "
+ appUrl + "/confirm?token=" + user.getConfirmationToken());
registrationEmail.setFrom("hotelwaltertorun@gmail.com");
emailService.sendEmail(registrationEmail);
if (user == null) { // No token found in DB
modelAndView.addObject("invalidToken", "Oops! This is an invalid confirmation link.");
} else { // Token found
modelAndView.addObject("confirmationToken", user.getConfirmationToken());
}
model.addAttribute("confirmationMessage", "E-mail potwierdzający został wysłany na adres " + user.getEmail());
modelAndView.setViewName("home");
}
return modelAndView;
}
HTML表单代码
<form th:autocomplete="on" id="register_form" class="form-horizontal" action="#"
th:action="@{/register}" th:object="${user}" method="post" role="form"
data-toggle="validator">
<input type="hidden" name="token" th:value="${confirmationToken}">
<div class="col-md-6 form-group">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="text" th:field="*{firstname}"
placeholder="Imię" class="form-control" required/>
</div>
</div>
<div class="col-md-6 form-group">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="text" th:field="*{lastname}"
placeholder="Nazwisko" class="form-control" required/> </div>
</div>
<div class="col-md-6 form-group">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-user"></i></span>
<input type="text" th:field="*{username}"
placeholder="Login" class="form-control" required/>
</div>
</div>
<div class="col-md-6 form-group">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-lock"></i></span>
<input name="password" type="password" id="password"
placeholder="Hasło" class="form-control" required />
</div>
</div>
<div class="col-md-6 form-group">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-lock"></i></span>
<input type="password" class="form-control" id="signup-password-confirm" placeholder="Potwierdź hasło" name="ConfirmPassword" data-fv-notempty="true"
data-fv-notempty-message="Please confirm password"
data-fv-identical="true"
data-fv-identical-field="password"
data-fv-identical-message="Both passwords must be identical" />
</div>
</div>
<div class="col-md-6 form-group">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-envelope"></i></span>
<input type="email" th:field="*{email}"
placeholder="Adres e-mail" class="form-control"
data-error="This email address is invalid" required />
</div>
</div>
<div class="col-md-6 form-group">
<div class="input-group">
<span class="input-group-addon"><i class="glyphicon glyphicon-phone"></i></span>
<input type="tel" th:field="*{phone}"
placeholder="Telefon" class="form-control"
data-error="This email address is invalid" required />
</div>
</div>
<div class="col-md-6 form-group">
<button id="register" class="btn btn-success" name="register" style="width:100%;">Zarejestruj <span class="glyphicon glyphicon-send"></span></button>
</div>
</form>
来自浏览器的错误说明
出现意外错误（type = Internal Server Error，status = 500）。 org.hibernate.PropertyAccessException：将空值赋给com.kaceper.model.User.enabled的原始类型setter的属性[class com.kaceper.model.User.enabled]
感谢您的帮助
答案 0 :(得分：0)
Thymeleaf正试图执行这样的事情：
user.setEnabled(null)
导致NullPointerException。将enabled字段更改为Boolean而不是boolean，并相应地更新getter和setter。