8

Spring と統合された REST サービス プロジェクトがあります。Bean 検証を統合しようとしています。カスタム注釈を作成しました:

 /**
  * Denotes a field as being no empty.
  *
  * @author pguzun
  */
 @Target({METHOD, FIELD, ANNOTATION_TYPE})
 @Retention(RUNTIME)
 @Constraint(validatedBy = {INotEmptyValidator.class})
 public @interface NotEmpty {

    Error error() default Error.ServerError;

    String message() default "{error.notEmpty}";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};
}

と

@Constraint(validatedBy = {INotEmptyValidator.class})

バリデータ インターフェイスを指定しました。

これがバリデーターの実装です。

 /**
  * Checks that a String is not empty.
  *
  * @see StringUtils#isEmpty(java.lang.CharSequence)
  * @author pguzun
  */
@Component
public class NotEmptyValidatorImpl implements INotEmptyValidator {


 @Override
 public void initialize(NotEmpty notEmpty) {
     // NOTHING TO DO
 }

 @Override
 public boolean isValid(String value, ConstraintValidatorContext context) {
     return !StringUtils.isEmpty(value);
 }
}

カスタム Validator Constraint Factory を作成しました

    /**
    * Is custom an {@link ConstraintValidatorFactory }. Engine for defining factory
    * methods for {@link ConstraintValidator}'s.
    *
    * @author pguzun
    */
    public class NeoSpringConstraintValidatorFactory implements ConstraintValidatorFactory, ApplicationContextAware {

        private ApplicationContext applicationContext;

        public NeoSpringConstraintValidatorFactory() {
        }

        @Override
        public <T extends ConstraintValidator<?, ?>> T getInstance(Class<T> key) {
            Map<String, T> beansByNames = applicationContext.getBeansOfType(key);
            if (beansByNames.isEmpty()) {
                try {
                    return key.newInstance();
                } catch (InstantiationException e) {
                    throw new RuntimeException("Could not instantiate constraint validator class '" + key.getName() + "'", e);
                } catch (IllegalAccessException e) {
                    throw new RuntimeException("Could not instantiate constraint validator class '" + key.getName() + "'", e);
                }
            }
            if (beansByNames.size() > 1) {
                throw new RuntimeException("Only one bean of type '" + key.getName() + "' is allowed in the application context");
            }
            return (T) beansByNames.values().iterator().next();
        }

        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
            Assert.notNull(applicationContext, "applicationContext can not be null");
            this.applicationContext = applicationContext;
        }
    }

そして、このように構成しました

<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" >
    <property name="constraintValidatorFactory" ref="constraintValidatorFactory"/> 
</bean>
<bean id="constraintValidatorFactory" class="com...NeoSpringConstraintValidatorFactory" >
</bean>

このように注釈が付けられたフィールドを持つ Bean で validate in service を呼び出すと、

/**
* The User's value object definition
*
* @author pguzun
*/
@XmlRootElement()
@XmlAccessorType(XmlAccessType.FIELD)
public class UserVO {

    @XmlElement
    private long id;
    @NotEmpty(error = Error.EmailVoid)
    private String email;

私は得る

    SEVERE: Servlet.service() for servlet jersey-serlvet threw exception
    javax.validation.ValidationException: HV000032: Unable to initialize com.backend.rest.validation.validator.NotEmptyValidatorImpl.
        at org.hibernate.validator.internal.engine.ConstraintTree.initializeConstraint(ConstraintTree.java:450)
        at org.hibernate.validator.internal.engine.ConstraintTree.createAndInitializeValidator(ConstraintTree.java:352)
        at org.hibernate.validator.internal.engine.ConstraintTree.getInitializedValidator(ConstraintTree.java:334)
        at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:155)
        at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:125)
        at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:86)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:442)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:387)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:351)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:303)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:133)
        at org.springframework.validation.beanvalidation.SpringValidatorAdapter.validate(SpringValidatorAdapter.java:194)
        at com.backend.rest.UserResourceImpl.validateGuest(UserResourceImpl.java:100)
        at com.backend.rest.UserResourceImpl.register(UserResourceImpl.java:77)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
        at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
        at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
        at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
        at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
        at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
        at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353)
        at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:662)
    Caused by: java.lang.ClassCastException: $Proxy84 cannot be cast to com.backend.rest.validation.validator.NotEmpty
        at com.backend.rest.validation.validator.NotEmptyValidatorImpl.initialize(NotEmptyValidatorImpl.java:18)
        at org.hibernate.validator.internal.engine.ConstraintTree.initializeConstraint(ConstraintTree.java:447)
        ... 49 more
    Jun 4, 2012 1:36:57 PM org.apache.catalina.core.StandardWrapperValve invoke
    SEVERE: Servlet.service() for servlet jersey-serlvet threw exception
    javax.validation.ValidationException: HV000032: Unable to initialize com.backend.rest.validation.validator.NotEmptyValidatorImpl.
        at org.hibernate.validator.internal.engine.ConstraintTree.initializeConstraint(ConstraintTree.java:450)
        at org.hibernate.validator.internal.engine.ConstraintTree.createAndInitializeValidator(ConstraintTree.java:352)
        at org.hibernate.validator.internal.engine.ConstraintTree.getInitializedValidator(ConstraintTree.java:334)
        at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:155)
        at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:125)
        at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:86)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:442)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:387)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:351)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:303)
        at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:133)
        at org.springframework.validation.beanvalidation.SpringValidatorAdapter.validate(SpringValidatorAdapter.java:194)
        at com.backend.rest.UserResourceImpl.validateGuest(UserResourceImpl.java:100)
        at com.backend.rest.UserResourceImpl.register(UserResourceImpl.java:77)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
        at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
        at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
        at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
        at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
        at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
        at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1483)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1414)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1363)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1353)
        at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:414)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:662)
    Caused by: java.lang.ClassCastException: $Proxy84 cannot be cast to com.backend.rest.validation.validator.NotEmpty
        at com.backend.rest.validation.validator.NotEmptyValidatorImpl.initialize(NotEmptyValidatorImpl.java:18)
        at org.hibernate.validator.internal.engine.ConstraintTree.initializeConstraint(ConstraintTree.java:447)
        ... 49 more

java.lang.ClassCastException: $Proxy84 cannot be cast to Clazz は、インターフェイスを使用しない場合の古典的なスプリング例外ですが、ここでは注釈として NotEmpty を使用します

私が間違っていることを教えてください。

ps。このバージョンのフレームワークを使用しています

   <properties>
    <spring.version>3.1.1.RELEASE</spring.version>
    <hibernate.version>4.1.3.Final</hibernate.version>
    <jersey.version>1.12</jersey.version>
    <validation.api.version>1.0.0.GA</validation.api.version>
    <hibernate.validator.version>4.3.0.Final</hibernate.validator.version>
4

3 に答える 3

8

この問題に時間を割いてくださったことに感謝したいと思います。
エラーは、この制約バリデータを持つ他の実装された注釈から発生します。 @Constraint(validatedBy = {INotEmptyValidator.class}). これは間違いなく行われました。

最後にこれは、インターフェイスとして制約バリデーターを指定して Bean 検証を行う良い例です @Constraint(validatedBy = {INotEmptyValidator.class})。実装NotEmptyValidatorImplはSpring Beanです。

于 2012-06-11T11:17:33.477 に答える
1

インポートを確認します。これを誤ってどこかにインポートしたと思います: org.hibernate.validator.constraints.NotEmpty 代わりに: com.backend.rest.validation.validator.NotEmpty

于 2012-06-04T13:12:02.637 に答える
1

余談ですが、正規表現に構文エラーがある場合、この同じ例外が発生します。構文エラーが問題であることに気付く前に、ここに来ました。

あなたの助けにはなりませんが、私は将来の貧しい魂がさらに検索する手間を省くことを望んでいます.

于 2014-07-28T15:23:39.070 に答える