我正在使用Spring MVC编写我的应用程序。 我想验证用户注册时数据库中是否存在电子邮件。我编写了自己的注释约束,名为 UniqueEmail 。
我的用户实体 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;
}
我的注释约束 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 {};
}
我的验证工具 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;
}
}
}
此代码适用于应用程序。
当我运行我的测试代码时,它返回NullPointerException。在我的验证课程中, userService 为空。
我已阅读http://docs.spring.io/spring/docs/3.0.0.RC3/reference/html/ch05s07.html,但无法解决任何问题。
有什么想法吗?
更新
我使用JUnit。的 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("mail@example.com"); // 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/>
答案 0 :(得分:1)
您是否在bean上下文中配置了Validator。如果您通过 Validation.buildDefaultValidatorFactory(); 引导 Validator ,则绕过Spring机制,您将获得一个不了解Spring bean和组件的Validator。因此注射不起作用。在您的测试中,您希望获得Spring提供的Validator。
答案 1 :(得分:0)
如果您的主要代码有效,那么应该直接让您的测试正常运行。 您需要在测试类上使用@ContextConfiguration,有关详细信息,请参阅此处: http://docs.spring.io/spring/docs/3.2.x/spring-framework-reference/html/testing.html
一般来说,有两种方法可以测试:
对于单元测试,您需要创建UniqueEmailValidator的实例并在该实例上设置UserService(通常是模拟UserServer)。
对于集成测试,您需要按照我上面提到的那样初始化spring上下文。
答案 2 :(得分:0)
你可以拨打注射所有@Autowired服务:
@Override
public void initialize(UniqueEmail uniqueEmail) {
org.springframework.web.context.support.SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);
}