java - 不要创建 userRepository bean

Question

我是 Spring 初学者，请帮忙

实体

    @Entity
@Table(name="users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
    private String username;
    private String password;

    @ManyToMany
    @JoinTable(name = "users_roles",
            joinColumns = {@JoinColumn(name = "user_id")},
            inverseJoinColumns = @JoinColumn(name = "role_id"))
    private Set<Role> roles;

    public Set<Role> getRoles() {
        return roles;
    }

    public void setRoles(Set<Role> roles) {
        this.roles = roles;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public long getId() {
        return id;
    }

    public void setId(long id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    protected User(){}
    public User(String name, String pass) {
        username = name;
        password = pass;
    }

}

存储库:

public interface UserRepository extends JpaRepository<User, Long> {
    User findByUsername(String username);
}

Controller :

  @RestController
    @RequestMapping("/users")
    @PreAuthorize("hasRole('ADMIN')")
    public class UserController {
        @Autowired
        UserRepository userRepository;

        @RequestMapping(method = RequestMethod.GET)
        public List<User> getUsers()
        {
            List<User> result = new ArrayList<User>();
            userRepository.findAll().forEach(result::add);
            return result;
        }

        @RequestMapping(method = RequestMethod.POST)
        public User addUser(String username, String password, String password_confirm)
        {
            if (username.isEmpty() || password.isEmpty() || password_confirm.isEmpty())
                return null;
            if (!password.equals(password_confirm))
                return null;
            return userRepository.save(new User(username, password));
        }

        @RequestMapping(value = "/add",method = RequestMethod.GET)
        public ModelAndView getUserForm()
        {
            return new ModelAndView("add");
        }

        @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
        public void delete(@PathVariable("id") Long id)
        {
            userRepository.delete(id);
        }

        @RequestMapping(value = "/{id}", method = RequestMethod.GET)
        public User getUser(@PathVariable("id") Long id)
        {
            return userRepository.findOne(id);
        }
    }

数据配置:

@Configuration
@EnableTransactionManagement
@PropertySource(value = {"classpath:hibernate.properties"})
@EnableJpaRepositories( "com.sergey.repository")
public class DataConfig {
    @Autowired
    private Environment environment;

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
        dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));


    dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
            dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
            return dataSource;
        }

    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan("com.sergey.entity");
        sessionFactory.setHibernateProperties(hibernateProperties());

        return sessionFactory;
    }

    private Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
        properties.put("show_sql", environment.getRequiredProperty("hibernate.show_sql"));
        properties.put("hibernate.hbm2ddl.auto", environment.getRequiredProperty("hibernate.hbm2ddl.auto"));
        return properties;
    }

    @Bean
    @Autowired
    public HibernateTransactionManager transactionManager(SessionFactory s) {
        HibernateTransactionManager txManager = new HibernateTransactionManager();
        txManager.setSessionFactory(s);
        return txManager;
    }

    @Bean
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }


    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean emfb = new LocalContainerEntityManagerFactoryBean();
        emfb.setDataSource(dataSource());
        emfb.setPackagesToScan("com.sergey.entity");
        emfb.setJpaVendorAdapter(jpaVendorAdapter());
        emfb.setJpaProperties(hibernateProperties());
        return emfb;
    }

    @Bean
    public JpaVendorAdapter jpaVendorAdapter() {
        return new HibernateJpaVendorAdapter();
    }

    @Bean
    public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(emf);
        return transactionManager;
    }

}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>springSecure</groupId>
    <artifactId>springSecure</artifactId>
    <version>1.0-SNAPSHOT</version>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <properties>
        <spring.version>4.3.2.RELEASE</spring.version>
        <spring.security.version>4.0.4.RELEASE</spring.security.version>
        <hibernate-version>5.0.11.Final</hibernate-version>
        <jdk.version>1.8</jdk.version>
    </properties>

    <dependencies>
        <!--Spring Framework-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--Spring Security-->
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <!--Spring DB-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-jpa

--> org.springframework.data spring-data-jpa 1.10.2.RELEASE org.springframework.data spring-data-commons-core 1.4.0.RELEASE org.hibernate hibernate-core ${hibernate-version} jstl jstl 1.2 javax.servlet javax.servlet-api 3.0.1 provided com.fasterxml.jackson.core jackson-annotations 2.8.1 org.postgresql postgresql 9.4.1211.jre7

    </dependencies>

</project>

错误:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager' defined in class path resource [com/sergey/config/DataConfig.class]: Ambiguous factory method matches found in bean 'transactionManager' (hint: specify index/type/name arguments for simple parameters to avoid type ambiguities): [public org.springframework.transaction.PlatformTransactionManager com.sergey.config.DataConfig.transactionManager(javax.persistence.EntityManagerFactory), public org.springframework.orm.hibernate5.HibernateTransactionManager com.sergey.config.DataConfig.transactionManager(org.hibernate.SessionFactory)] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:561) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:776) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:861) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:541) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:444) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:326) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5116) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5634) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1863) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown Source) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(Unknown Source) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(Unknown Source) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(Unknown Source) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(Unknown Source) at javax.management.remote.rmi.RMIConnectionImpl.access$300(Unknown Source) at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(Unknown Source) at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(Unknown Source) at javax.management.remote.rmi.RMIConnectionImpl.invoke(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source) at sun.rmi.transport.Transport$1.run(Unknown Source) at sun.rmi.transport.Transport$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Unknown Source) at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

окт 29, 2016 3:33:04 PM org.apache.catalina.core.ApplicationContext log

Answer 1

Spring 存储库是由 Spring-JPA 框架在运行时实现的，@NoRepositoryBean 应该只为 BaseRepositories 标记，用于为所有子接口(interface)(如果有)提供一些默认行为。

异常表示“没有找到依赖项[com.sergey.repository.UserRepository]”类型的合格bean，这是因为Spring容器没有提供实现，因为它被标记为@NoRepositoryBean

换句话说，您不应该向 UserRepository 添加 @NoRepositoryBean 注解，因为它是一个具体的存储库接口(interface)，需要由 Spring-JPA 框架实现(在运行时)。所以去掉顶部的注解，然后UserRepository类就变成如下:

public interface UserRepository extends JpaRepository<User, Long> {
    User findByUsername(String username);
}

请参阅以下文档了解更多详细信息:

http://docs.spring.io/spring-data/jpa/docs/current/reference/html/