我正在使用Spring MVC寫我的應用程序。 我想驗證用戶註冊時數據庫中是否存在電子郵件。我寫了自己的註釋約束,名爲UniqueEmail。如何在ConstraintValidator自動裝配服務
我的用戶實體User.java:
@Entity
@Table(name="users")
public class User {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@Column(name = "email", length = 100, nullable = false, unique = true)
@NotEmpty
@Email
@UniqueEmail(message = "E-mail is not unique")
private String email;
@Column(name = "password", nullable = false)
@NotEmpty
@Size(min = 5, message = "size must be more 5")
private String password;
}
我的註釋約束UniqueEmail.java:
@Target({FIELD})
@Retention(RUNTIME)
@Constraint(validatedBy = UniqueEmailValidator.class)
@Documented
public @interface UniqueEmail {
String message() default "Email is exist";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
}
我的驗證UniqueEmailValidator.java:
@Component
public class UniqueEmailValidator implements ConstraintValidator<UniqueEmail, String> {
@Autowired
private UserService userService;
@Override
public void initialize(UniqueEmail uniqueEmail) {
}
@Override
public boolean isValid(String s, ConstraintValidatorContext constraintValidatorContext) {
try {
return userService.isExistEmail(s);
} catch (Exception e) {
System.out.println(e);
return false;
}
}
}
此代碼適用於應用程序。
當我運行我的測試代碼時,它返回NullPointerException。在我的驗證類userService爲空。
我讀過http://docs.spring.io/spring/docs/3.0.0.RC3/reference/html/ch05s07.html,但不能解決任何問題。
有什麼想法?
更新
我使用JUnit。 UserClassTest.java
@ContextConfiguration("file:src/main/webapp/WEB-INF/mvc-dispatcher-servlet.xml")
public class UserClass {
private static Validator validator;
@BeforeClass
public static void setup() {
ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
validator = factory.getValidator();
}
@Test
public void emailIsUnique() {
User user = new User();
user.setEmail("[email protected]"); // I've written exist email in DB.
Set<ConstraintViolation<User>> constraintViolations = validator.validateProperty(user, "email");
assertEquals(1, constraintViolations.size());
assertEquals("E-mail is not unique", constraintViolations.iterator().next().getMessage());
}
}
更新
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="ru.yadoka"/>
<import resource="db/db-config.xml"/>
<!-- Apache tiles -->
<bean id="tilesConfigurer"
class="org.springframework.web.servlet.view.tiles3.TilesConfigurer">
<property name="definitions">
<list>
<value>/WEB-INF/tiles.xml</value>
</list>
</property>
</bean>
<bean id="viewResolver"
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.tiles3.TilesView"/>
</bean>
<!-- Mapping resources from theme -->
<mvc:resources mapping="/css/**" location="/resources/css/"/>
<mvc:resources mapping="/js/**" location="/resources/js/"/>
<mvc:resources mapping="/fonts/**" location="/resources/
<mvc:annotation-driven/>
如果userService爲空,這意味着你沒有它正確自動裝配。 – Eugene
您是否在applicationcontext中使用? –
Koitoer
Kiotoer - yes''。在我的控制器中,userService自動裝配正確。 –
Mufanu