spring 错误中验证器的目标无效？
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Invalid target for Validator in spring error?
提问by Pulkit
Hi all I am getting the following error whenever I am trying to invoke validator in my spring
大家好，每当我试图在我的春天调用验证器时，我都会收到以下错误
Servlet.service() for servlet spring threw exception: java.lang.IllegalStateException: Invalid target for Validator
Please have a look and help me out in this error, previously I user the validation for login page and it is working fine but now its not working.
请查看并帮助我解决此错误，以前我使用登录页面的验证，它工作正常，但现在无法工作。
Here is my code snippet .
这是我的代码片段。
Controller
控制器
@Controller
public class NewUserRegistration
{
@Autowired
private UserService userService;
@Autowired
private NewUserValidator newUserValidator;
@InitBinder
public void initBinder(WebDataBinder binder)
{
binder.setValidator(newUserValidator);
}
@RequestMapping(value="/newUserAdd", method=RequestMethod.POST)
public String addUser(@ModelAttribute("user")@Valid User user,BindingResult result, Model model)
{
return "NewUser";
}
}
}
Validator
验证器
@Component
public class NewUserValidator implements Validator
{
@Override
public boolean supports(Class<?> classz)
{
return NewUserRegistration.class.equals(classz);
}
@Override
public void validate(Object obj, Errors error)
{
//Validation login for fields
}
}
JSP Page
JSP页面
<form:form action="newUserAdd" method="POST" modelAttribute="user">
<center>
<table>
<tr><td>User Id:</td><td><input name="userId" type="text" /></td><td><font color="red"><c:out value="${userIdError}" /></font> </td></tr>
<tr><td>Password:</td><td><input name="userPassword" type="password"/></td><td><font color="red"><c:out value="${userPasswordError}" /></font></td></tr>
<tr><td>Confirm Password:</td><td><input name="userConfirmPassword" type="password"/></td><td><font color="red"><c:out value="${userPasswordError}" /></font></td></tr>
<tr><td>Name:</td><td><input name="userName" type="text"/></td><td><font color="red"><c:out value="${userPasswordError}" /></font></td></tr>
<tr><td></td><td><input type="submit" value="Create"/></td></tr>
</table>
</center>
</form:form>
回答by Pulkit
The problem is actually in Validator class you are using NewUserRegistration's object which is wrong because you want to validate your User's object not your NewUserRegistration's object.
问题实际上是在 Validator 类中，您使用的是 NewUserRegistration 的对象，这是错误的，因为您想验证 User 的对象而不是 NewUserRegistration 的对象。
@Override
public boolean supports(Class<?> classz)
{
return NewUserRegistration.class.equals(classz);
}
which should be
这应该是
@Override
public boolean supports(Class<?> classz)
{
return User.class.equals(classz);
}
