NoSuchBeanDefinitionException：没有为依赖项找到类型[Repository]的限定bean：预期至少有1个bean有资格作为autowire

时间：2016-05-28 10:43:06

标签： java spring repository spring-data-jpa autowired

我发现类似的问题解释了许多门户网站。但我猜这是独特的情况。我在spring mvc app中收到错误。

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'testController' defined in file [C:\Program Files (x86)\sts-bundle\pivotal-tc-server-developer-3.1.2.RELEASE\base-instance\wtpwebapps\ExpT1\WEB-INF\classes\com\expt\controller\TestController.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [com.expt.repositories.CategoryRepository]: No qualifying bean of type [com.expt.repositories.CategoryRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.expt.repositories.CategoryRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749)
    org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185)

.....

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.expt.repositories.CategoryRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1373)

代码如下。我认为已经复制了足够多的代码。请帮助我了解缺少的内容以及如何解决此问题。任何帮助都会很棒...... !! 码： Appinitializer：

package com.expt.config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;


public class AppInitialzer extends AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        // TODO Auto-generated method stub
        return new Class[]{SpringAppContInit.class, SQLDevDataSource.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        // TODO Auto-generated method stub
        return new Class[]{WebMvcConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        // TODO Auto-generated method stub
        return new String[]{"/"};
    }

}

SQLDEVConfig：

package com.expt.config;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSource;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;

@Configuration
@Profile("SQLDev")
@EnableJpaRepositories(basePackages={"com.expt.repositories"})
public class SQLDevDataSource extends AbstractJpaConfig {

    @Override
    public DataSource getDataSource() {
        // TODO Auto-generated method stub
        return createBasicDataSource("jdbc:jtds:sqlserver://LOCAL:1433/MYDB;", "net.sourceforge.jtds.jdbc.Driver", "UNMA", "PWD123");
    }
    public BasicDataSource createBasicDataSource(String jdbcUrl, String driverClass, String userName, String password) {
        BasicDataSource dataSource = new BasicDataSource();
        dataSource.setUrl(jdbcUrl);
        dataSource.setDriverClassName(driverClass);
        dataSource.setUsername(userName);
        dataSource.setPassword(password);
        return dataSource;
    }

}

SpringAPpContInit：

package com.expt.config;

import org.springframework.context.ApplicationContextInitializer;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;

public class SpringAppContInit implements ApplicationContextInitializer<AnnotationConfigWebApplicationContext> {

    @Override
    public void initialize(AnnotationConfigWebApplicationContext applicationContext) {
        // TODO Auto-generated method stub
        ConfigurableEnvironment configEnv = applicationContext.getEnvironment();
        configEnv.addActiveProfile("SQLDev");
    }

}

AbstrackJpaConfig：

   package com.expt.config;

import java.util.HashMap;
import java.util.Map;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.spi.PersistenceProvider;
import javax.sql.DataSource;

import org.hibernate.dialect.SQLServer2008Dialect;
import org.hibernate.jpa.HibernatePersistenceProvider;
import org.springframework.context.annotation.Bean;
import org.springframework.orm.jpa.JpaDialect;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.JpaVendorAdapter;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
import org.springframework.transaction.PlatformTransactionManager;

import com.expt.domain.Category;

public abstract class AbstractJpaConfig {

    public abstract DataSource getDataSource();

    @Bean(name="entityManagerFactory")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource){
        Map<String, String> properties = new HashMap<String, String>();
        properties.put(org.hibernate.cfg.Environment.HBM2DDL_AUTO, "validate");
        properties.put(org.hibernate.cfg.Environment.DIALECT, SQLServer2008Dialect.class.getName());
        properties.put(org.hibernate.cfg.Environment.SHOW_SQL, "true");

        LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
        em.setDataSource(dataSource);
        //em.setPackagesToScan(Expense.class.getPackage().getName());
        em.setPackagesToScan(Category.class.getPackage().getName());
        //em.setPersistenceProvider(new HibernatePersistenceProvider());
        em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
        em.setJpaPropertyMap(properties);       
        return em;
    }

    @Bean(name = "transactionManager")
    public PlatformTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
        return new JpaTransactionManager(entityManagerFactory);
    }
}

控制器：

package com.expt.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.expt.domain.Category;
import com.expt.repositories.CategoryRepository;

@RestController
@RequestMapping("/test")
public class TestController {

    CategoryRepository catRepo;

    @Autowired
    public TestController(CategoryRepository catRepo) {
        this.catRepo = catRepo;
    }

    /*private CategoryService catSvc;

    @Autowired
    public TestController(CategoryService catSvc) {
        this.catSvc = catSvc;
    }*/

    @RequestMapping("/simple")
    public String test(){
        return "testing";
    }

    @RequestMapping("/json")
    public Iterable<Category> testJ(){
        return catRepo.findAll();
    }
}

CategoryRepository：

package com.expt.repositories;

import java.math.BigDecimal;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

import com.expt.domain.Category;

@Repository
public interface CategoryRepository extends JpaRepository<Category, BigDecimal> {

}

=============================================== ==========

编辑:(由于添加了很多评论，想要添加这些细节）

我指的是https://github.com/scottfrederick/spring-music。其中public class AppInitializer implements WebApplicationInitializer用于appinitializer。

完整代码就在这里，我在旧项目中使用的是什么。这会手动注册配置类，并且它正在运行。但是当我们从AbstractAnnotationConfigDispatcherServletInitializer延伸时，它不需要。

   public class AppInitializer implements WebApplicationInitializer{

    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        // TODO Auto-generated method stub
        configureAppContextInitializers(servletContext, SpringAppContInit.class.getName());

        AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
        rootContext.register(RepositoryConfig.class);
        servletContext.addListener(new ContextLoaderListener(rootContext));

        AnnotationConfigWebApplicationContext webContext = new AnnotationConfigWebApplicationContext();
        webContext.register(WebMvcConfig.class);

        DispatcherServlet dispatcherServlet = new DispatcherServlet(webContext);
        ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", dispatcherServlet);
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/");
    }

    private void configureAppContextInitializers(ServletContext container, String... initClassNames) {
        String initializerClasses = container.getInitParameter(ContextLoader.CONTEXT_INITIALIZER_CLASSES_PARAM);

        String delimitedClassNames = StringUtils.arrayToDelimitedString(initClassNames, " ");

        if (StringUtils.hasText(initializerClasses)) {
            initializerClasses += " " + delimitedClassNames;
        }
        else {
            initializerClasses = delimitedClassNames;
        }

        container.setInitParameter(ContextLoader.CONTEXT_INITIALIZER_CLASSES_PARAM, initializerClasses);
    }
}

如果是AbstractAnnotationConfigDispatcherServletInitializer，方法getRootConfigClasses和getServletConfigClasses会隐式注册。现在我正在查找上述代码无效的原因。我有一些解决方法，我可以通过恢复到XML或WebApplicationInitializer来使其工作。我正在寻找一个解决方案，并尽可能使用更新的代码而不是API文档。我需要一个教程。 API文档无法帮助我解决问题。

2 个答案:

答案 0 :(得分：1)

您自己实施的WebApplicationInitializer和实施扩展AbstractAnnotationConfigDispatcherServletInitializer是不同的。它们表现不同，这是因为您没有注册自定义ApplicationContextInitializer。如何注册ApplicationContextInitializer在javadoc中进行了解释（请注意设置ApplicationContextInitializer集合的2种方法。）。 

public class AppInitialzer extends AbstractAnnotationConfigDispatcherServletInitializer {

    ...    

    protected ApplicationContextInitializer<?>[] getRootApplicationContextInitializers() {
        return new ApplicationContextInitializer[] { new SpringAppContInit() } ;
    }
}

然而，ApplicationContextInitializer并没有真正添加任何通过简单地设置环境或系统属性而无法完成的事情。 

spring.profiles.active=SQLDev

当你这样做时，你不需要那个init。

我也非常相信你的@EnableJpaRepositories是错误的，你想要启用它们的事实不应该取决于你的个人资料。

答案 1 :(得分：0)

  

@ComponentScan（basePackages =“base package”）       @EntityScan（basePackages =“base package”）       @EnableJpaRepositories（basePackages =“base package”）

使用这个注释，如果你使用的是spring-data-jpa，那么在TestController中扩展CrudRepository或PagingAndSortingRepository而不是JpaRepository.And，就像这样自动装配：

  

@Autowired（required = true）CategoryRepository catRepo;   同时检查类别是否为 BigDecimal 。

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