嗨，我是 spring mvc 验证框架的新手。我正在尝试为登录表单实现一个简单的自定义验证器。
我这样做了，但是 result.hasErrors() 总是返回 null 并且我的控件正在移动到成功页面。
登录.jsp
<form:form method="POST" action="/SampleWeb/logins" commandName="USER">
<table align="center" border="5" bordercolor="orange">
<tr>
<td style="color: white" align="center"><label>User Name</label></td>
<td><input name="userName" /></td>
</tr>
<tr>
<td style="color: white" align="center"><label>Password</label></td>
<td><input name="password" type="password"/></td>
</tr>
<tr>
<td colspan="2" style="color: white" align="center">
<input type="submit" value="Submit"/>
</td>
</tr>
</table>
<h3 align="center" style="color: red">${error}</h3>
</form:form>
示例-servlet.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:annotation-config />
<mvc:annotation-driven />
<context:component-scan base-package="com.sample.web.controller" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="/WEB-INF/messages"/>
</bean>
</beans>
UserValidator（我的自定义验证器）
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
@Component
public class UsersValidator implements Validator {
@Override
public boolean supports(Class<?> clazz) {
return clazz.isAssignableFrom(users.class);
}
@Override
public void validate(Object obj, Errors errors) {
users user = (users) obj;
String userName = user.getUserName();
validateuserName(userName, errors);
}
private void validateuserName(String userName, Errors errors) {
if (isValidString(userName) && isNotBirminghamuserName(userName)) {
errors.rejectValue("userName", "UsersValidator.userName.notBirmingham",
"Not a b group user ");
}
}
private boolean isValidString(String str) {
return isNotNull(str) && (str.length() > 0);
}
private boolean isNotNull(String userName) {
return userName != null;
}
/** The first character of the Birmingham post code is 'B' */
private boolean isNotBirminghamuserName(String userName) {
char val = userName.charAt(0);
return val != 'B';
}
}
控制器
import javax.validation.Valid;
@Controller
public class LoginController {
@Autowired
private UsersValidator usersValidator;
final RequestHandler requestHandler = new RequestHandler();
@RequestMapping(value = "/login", method = RequestMethod.GET)
public ModelAndView login() {
return new ModelAndView("login", "users", new users());
}
@InitBinder
protected void initBinder(WebDataBinder binder) {
binder.setValidator(usersValidator);
}
@RequestMapping(value = "/logins",method = RequestMethod.POST)
public ModelAndView validateUser(@Valid users user, BindingResult result,@ModelAttribute("USER")users users,RedirectAttributes redirectAttributes,ModelMap model) {
if (result.hasErrors()) {
model.addAttribute("error",
"No Errors This Time for postal code: " + user.getUserName());
}
return new ModelAndView("sample", model);
}
}
Users.java（我的 pojo）
public class users implements Serializable {
private String userName;
private String password;
//getter setters
}
我的意思是跳过验证器类中的验证，控件直接进入成功页面。有人可以在这个问题上帮助我吗？