[英]No qualifying bean of type UserRepository found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency
[英]NoSuchBeanDefinitionException: No qualifying bean of type [Repository] found for dependency: expected at least 1 bean which qualifies as autowire
我发现类似的问题解释了许多门户网站。 但我想这是独特的情况。 我在 spring mvc 应用程序中遇到错误。
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。 请帮助我了解缺少什么以及如何解决此问题。 任何帮助都会很棒......! 代码: 应用初始化程序:
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[]{"/"};
}
}
SQLDEV 配置:
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();
}
}
类别存储库:
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:(由于对此添加了很多评论,因此也想添加这些详细信息)
我指的是https://github.com/scottfrederick/spring-music 。 它使用public class AppInitializer implements WebApplicationInitializer
为 appinitializer public class AppInitializer implements WebApplicationInitializer
。
完整代码在这里,我在旧项目中使用的代码。 这确实手动注册配置类并且它正在工作。 但是当我们从AbstractAnnotationConfigDispatcherServletInitializer
扩展时,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);
}
}
在AbstractAnnotationConfigDispatcherServletInitializer
情况下,方法getRootConfigClasses
和getServletConfigClasses
隐式地进行注册。现在我正在寻找我上面的代码不起作用的原因。 我有解决方法,比如我可以通过恢复到 XMLs 或WebApplicationInitializer
使其工作。 如果可能,我正在寻找更新代码而不是 API 文档的解决方案和原因。 我需要一个教程。 API 文档不会帮助我解决问题。
您自己的WebApplicationInitializer
实现和扩展AbstractAnnotationConfigDispatcherServletInitializer
的实现是不同的。 它们的行为不同,这是因为您没有注册自定义ApplicationContextInitializer
。 javadoc 中解释了如何注册ApplicationContextInitializer
(注意设置ApplicationContextInitializer
集合的两种方法。)。
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设置环境或系统属性无法完成的事情。
spring.profiles.active=SQLDev
当你这样做时,你不需要那个初始化。
我也坚信您的@EnableJpaRepositories
在错误的类上,您想要启用这些的事实不应该取决于您的个人资料。
@ComponentScan(basePackages = "base package") @EntityScan(basePackages ="base package") @EnableJpaRepositories(basePackages = "base package")
使用此注释,如果您使用的是 spring-data-jpa,则扩展 CrudRepository 或 PagingAndSortingRepository 而不是 JpaRepository。并且在 TestController 中给出这样的自动装配:
@Autowired(required = true) CategoryRepository catRepo; 还要检查 Category 类型的 id 是否为BigDecimal 。
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