web-dev-qa-db-ja.com

フィールドをcom.Sun.proxy。$ Proxyに設定できません

ファイルのアップロードでは、Spring ControllerでValidatorを次のように挿入して使用しようとしています。

@RestController
@RequestMapping("/api")
public class FileController{

    @Autowired
    private MessageSource messageSource;

    @Autowired
    FileValidator validator;

    @InitBinder("file")
    public void initBinderFile(WebDataBinder binder) {
        binder.setValidator(validator);
    }

    @RequestMapping(value = "/fileUpload2", method = RequestMethod.POST, produces = {"text/plain"})
    @PreAuthorize("hasAuthority('ADMINISTRATOR')")
    public String singleFileUpload2(@Valid @ModelAttribute("file") File file, BindingResult result) throws IOException {
        if (result.hasErrors()) {
            String errorString = "";
            for (ObjectError error : result.getAllErrors()) {
                 errorString = errorString.concat(messageSource.getMessage(error.getCode(), new String[]{}, Locale.ENGLISH)+"\n");
            }
            return errorString;
        } else {
            MultipartFile multipartFile = file.getFile();

            String fileName = multipartFile.getOriginalFilename();
            System.out.println("Fetching file: "+fileName);

            return messageSource.getMessage("upload.file.success", new String[]{}, Locale.ENGLISH);
        }
    }

}

ここに私のバリデーターがあります：

@Component
public class FileValidator implements Validator {

    @Override
    public boolean supports(Class<?> clazz) {
        return File.class.isAssignableFrom(clazz);
    }

    @Override
    public void validate(Object obj, Errors errors) {
        File file = (File) obj;

        if (file.getFile().getSize() == 0) {
            errors.rejectValue("file", "missing.file");
        } else try {
            if (file.getFile().getBytes().length > 2097152l) {
                errors.rejectValue("file", "upload.file.error.size");
            }
            if(!file.getFile().getContentType().equalsIgnoreCase("text/html")){
                 errors.rejectValue("file", "incorrect.file.type");
            }
        } catch (IOException ex) {
            errors.rejectValue("file", "upload.file.error");
        } 
    }
}

検証しようとしているFileオブジェクトは次のとおりです。

public class File {

    private String name;
    private MultipartFile file;

    public File() {
    }

    public File(MultipartFile file) {
        this.file = file;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public MultipartFile getFile() {
        return file;
    }

    public void setFile(MultipartFile file) {
        this.file = file;
    }

}

そして、ここにアプリケーションを起動しようとしたときに表示されるエラーがあります：

    org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fileController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.enterprise.springapp.web.validators.FileValidator com.eurodyn.springapp.web.FileController.validator; nested exception is Java.lang.IllegalArgumentException: Can not set com.enterprise.springapp.web.validators.FileValidator field com.enterprise.springapp.web.FileController.validator to com.Sun.proxy.$Proxy101
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.Java:334) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.Java:1214) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.Java:543) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.Java:482) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.Java:306) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.Java:230) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.Java:302) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.Java:197) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.Java:772) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.Java:839) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.Java:538) ~[spring-context-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.Java:118) ~[spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.Java:766) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.Java:361) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.Java:307) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.Java:1191) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.Java:1180) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE]
    at com.enterprise.springapp.SpringApp.main(SpringApp.Java:30) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.enterprise.springapp.web.validators.FileValidator com.enterprise.springapp.web.FileController.validator; nested exception is Java.lang.IllegalArgumentException: Can not set com.enterprise.springapp.web.validators.FileValidator field com.enterprise.springapp.web.FileController.validator to com.Sun.proxy.$Proxy101
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.Java:573) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.Java:88) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.Java:331) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 17 common frames omitted
Caused by: Java.lang.IllegalArgumentException: Can not set com.enterprise.springapp.web.validators.FileValidator field com.enterprise.springapp.web.FileController.validator to com.Sun.proxy.$Proxy101
    at Sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.Java:167) ~[na:1.8.0_45]
    at Sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.Java:171) ~[na:1.8.0_45]
    at Sun.reflect.UnsafeObjectFieldAccessorImpl.set(UnsafeObjectFieldAccessorImpl.Java:81) ~[na:1.8.0_45]
    at Java.lang.reflect.Field.set(Field.Java:764) ~[na:1.8.0_45]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.Java:569) ~[spring-beans-4.2.6.RELEASE.jar:4.2.6.RELEASE]
    ... 19 common frames omitted
2016-06-09 15:12:39.909  WARN 4896 --- [           main] o.s.boot.SpringApplication               : Error handling failed (Error creating bean with name 'delegatingApplicationListener' defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: BeanPostProcessor before instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration': Initialization of bean failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importRegistry' is defined)

何が起こっているのか分かりません。誰でも助けることができますか？

javaspringspring-mvcspring-bootspring-aop
10
FunnyJava

「FileValidator」フィールド「FileController.validator」を「com.Sun.proxy。$ Proxy101」に設定できません

FileValidatorはクラスであり、インターフェイスではありません。

com.Sun.proxy.$Proxy101は、クラスプロキシではなく、インターフェイスプロキシです。

これを解決するには、主に2つの方法があります。インターフェースを介してバリデーターを注入するか、例えば：

@Autowired @Qualifier("fileValidator")
private Validator fileValidator;

またはクラスプロキシを有効にします、例：

@SpringBootApplication
@EnableAspectJAutoProxy(proxyTargetClass = true)
public class Application {

これらは単なる例であり、これら2つのソリューションを実装する他の方法があります。

22
OrangeDog

クラスFileControllerのFileValidator(class)のインターフェースを自動配線します。これを行うと、以下で説明するように@Qualifierを指定する必要がなくなります。

@Autowired
IFileValidator filevalidator;
2
pgcool