Question

使用验证API时出错。我在验证register.jsp中的输入我已经包括了所需的罐子。验证-API 1.1.0.Final.jar 冬眠验证器-5.0.1.Final.jar

register.jsp

<h4>Register</h4>
<form:form method="post" action="register" modelAttribute="user">
    <form:label path="userName">UserName</form:label>
    <form:input path="userName"/>
    <form:errors path="userName"/><br>
    <form:label path="password">Password</form:label>
    <form:password path="password"/> <br>
    <input type="submit" value="Register">
</form:form>

User.java

@Entity
@Table(name="usertable")
public class User {
    @Id
    @Column(name="username")
    @Size(min=6,max=10,message="Error Message")
    private String userName;
    @Column(name="password")
    private String password;

当我输入小于6的用户名时，result.hasErrors（）为false，但应该为true。 RegisterController.java

@Controller
@RequestMapping(value="register")
public class RegisterController {
    @Autowired
    private RegisterService registerService;
    @RequestMapping(method=RequestMethod.POST)
    public ModelAndView register(@Valid User user,BindingResult result){
        System.out.println("hi");
        if(result.hasErrors()){
            return new ModelAndView("index");
        }
        else{
            if(registerService.register(user))  
                return new ModelAndView("success");
            return new ModelAndView("failure");
        }
    }
    public RegisterService getRegisterService() {
        return registerService;
    }
    public void setRegisterService(RegisterService registerService) {
        this.registerService = registerService;
    }
}

RegisterService.java

@Service
public class RegisterService {
    @Autowired
    private RegisterDao registerDao;
    @Transactional
    public boolean register(User user){
        registerDao.register(user);
        return true;
    }
    public RegisterDao getRegisterDao() {
        return registerDao;
    }
    public void setRegisterDao(RegisterDao registerDao) {
        this.registerDao = registerDao;
    }
}

RegisterDao.java

@Repository
public class RegisterDao {
    @Autowired
    private SessionFactory sessionFactory;
    public boolean register(User user){
        this.sessionFactory.getCurrentSession().save(user);
        return true;
    }
    public SessionFactory getSessionFactory() {
        return sessionFactory;
    }
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }
}

收到此错误

SEVERE: Servlet.service() for servlet [spring] in context with path [/Annotated] threw exception [Request processing failed; nested exception is javax.validation.ConstraintViolationException: Validation failed for classes [com.labs.domain.User] during persist time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='Error Message', propertyPath=userName, rootBeanClass=class com.labs.domain.User, messageTemplate='Error Message'}
]] with root cause
javax.validation.ConstraintViolationException: Validation failed for classes [com.labs.domain.User] during persist time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='Error Message', propertyPath=userName, rootBeanClass=class com.labs.domain.User, messageTemplate='Error Message'}
]

有人能告诉我哪里出错了吗？

Answer 1

尝试将第二个需要的注释添加到Controller RequestMapping：

@RequestMapping(method=RequestMethod.POST)
public ModelAndView register(@Valid @ModelAttribute User user, BindingResult result) {
    ...
}

此外，在提交页面之前，是否有GET请求，您在最初加载页面时使用适当的用户提供模型？

Answer 2

阅读弹簧验证文档后，我知道，我必须在弹簧配置中添加<mvc:annotation-driven/>。

弹簧形式验证（JSR-303）

2 个答案: