创建 ets.config.DemoAppConfig 中定义的名称为“sessionFactory”的 bean 时出错：通过工厂方法进行的 bean 实例化失败

Question

Full stacktrace:

     GenerationTarget encountered exception accepting command : Error executing DDL "create table employee (id integer generated by default as identity, email varchar(255), first_name varchar(255), last_name varchar(255), employee_detail_id integer, primary key (id))" via JDBC Statement
org.hibernate.tool.schema.spi.CommandAcceptanceException: Error executing DDL "create table employee (id integer generated by default as identity, email varchar(255), first_name varchar(255), last_name varchar(255), employee_detail_id integer, primary key (id))" via JDBC Statement
    at org.hibernate.tool.schema.internal.exec.GenerationTargetToDatabase.accept(GenerationTargetToDatabase.java:67)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlString(SchemaCreatorImpl.java:440)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.applySqlStrings(SchemaCreatorImpl.java:424)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.createFromMetadata(SchemaCreatorImpl.java:315)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.performCreation(SchemaCreatorImpl.java:166)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:135)
    at org.hibernate.tool.schema.internal.SchemaCreatorImpl.doCreation(SchemaCreatorImpl.java:121)
    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.performDatabaseAction(SchemaManagementToolCoordinator.java:155)
    at org.hibernate.tool.schema.spi.SchemaManagementToolCoordinator.process(SchemaManagementToolCoordinator.java:72)
    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:309)
    at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:462)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:708)
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
    at org.springframework.orm.hibernate5.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:615)
    at org.springframework.orm.hibernate5.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:599)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1769)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1706)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:583)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:742)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:676)
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:545)
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:499)
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:172)
    at javax.servlet.GenericServlet.init(GenericServlet.java:203)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1441)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1240)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5343)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:5588)
    at com.sun.enterprise.web.WebModule.start(WebModule.java:516)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:877)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:860)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:644)
    at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:2020)
    at com.sun.enterprise.web.WebContainer.loadWebModule(WebContainer.java:1666)
    at com.sun.enterprise.web.WebApplication.start(WebApplication.java:83)
    at org.glassfish.internal.data.EngineRef.start(EngineRef.java:98)

DemoAppConfig类：

     @Configuration
@EnableWebMvc
@ComponentScan
@EnableTransactionManagement
@PropertySource("classpath:persistence-mysql.properties")
public class DemoAppConfig implements WebMvcConfigurer {


    @Autowired
    private Environment env;

    private Logger logger = Logger.getLogger(getClass().getName());

    @Bean
    public DataSource dataSource() {

        // create connection pool
        ComboPooledDataSource myDataSource = new ComboPooledDataSource();

        // set the jdbc driver
        try {
            myDataSource.setDriverClass("com.mysql.jdbc.Driver");
        }
        catch (PropertyVetoException exc) {
            throw new RuntimeException(exc);
        }

        // for sanity's sake, let's log url and user ... just to make sure we are reading the data
        logger.info("jdbc.url=" + env.getProperty("jdbc.url"));
        logger.info("jdbc.user=" + env.getProperty("jdbc.user"));

        // set database connection props
        myDataSource.setJdbcUrl(env.getProperty("jdbc.url"));
        myDataSource.setUser(env.getProperty("jdbc.user"));
        myDataSource.setPassword(env.getProperty("jdbc.password"));

        // set connection pool props
        myDataSource.setInitialPoolSize(getIntProperty("connection.pool.initialPoolSize"));
        myDataSource.setMinPoolSize(getIntProperty("connection.pool.minPoolSize"));
        myDataSource.setMaxPoolSize(getIntProperty("connection.pool.maxPoolSize"));
        myDataSource.setMaxIdleTime(getIntProperty("connection.pool.maxIdleTime"));

        return myDataSource;
    }

    private Properties getHibernateProperties() {

        // set hibernate properties
        Properties props = new Properties();

        props.setProperty("hibernate.dialect", env.getProperty("hibernate.dialect"));
        props.setProperty("hibernate.show_sql", env.getProperty("hibernate.show_sql"));

        return props;
    }


    // need a helper method
    // read environment property and convert to int

    private int getIntProperty(String propName) {

        String propVal = env.getProperty(propName);

        // now convert to int
        int intPropVal = Integer.parseInt(propVal);

        return intPropVal;
    }

    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan(
                new String[]{"ets.entity"});
        sessionFactory.setHibernateProperties(hibernateProperties());

        return sessionFactory;
    }

    @Bean
    public PlatformTransactionManager hibernateTransactionManager() {
        HibernateTransactionManager transactionManager
                = new HibernateTransactionManager();
        transactionManager.setSessionFactory(sessionFactory().getObject());
        return transactionManager;
    }

    private final Properties hibernateProperties() {
        Properties hibernateProperties = new Properties();
        hibernateProperties.setProperty(
                "hibernate.hbm2ddl.auto", "create-drop");
        hibernateProperties.setProperty(
                "hibernate.dialect", "org.hibernate.dialect.H2Dialect");

        return hibernateProperties;
    }

}

班级Employee:

  package ets.entity;

import javax.persistence.*;

@Entity
@Table(name="employee")
public class Employee {

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    @Column(name="id")
    private int id;

    @Column(name = "first_name")
    private String firstName;

    @Column(name = "last_name")
    private String lastName;

    @Column(name = "email")
    private String email;

    @OneToOne(cascade= {CascadeType.PERSIST, CascadeType.MERGE,
            CascadeType.DETACH, CascadeType.REFRESH})
    @JoinColumn(name = "employee_detail_id")
    private EmployeeDetail employeeDetail;

    public Employee() {
    }

    public Employee(int id, String firstName, String lastName, String email, EmployeeDetail employeeDetail) {
        this.id = id;
        this.firstName = firstName;
        this.lastName = lastName;
        this.email = email;
        this.employeeDetail = employeeDetail;
    }

    public int getId() {
        return id;
    }

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

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public EmployeeDetail getEmployeeDetail() {
        return employeeDetail;
    }

    public void setEmployeeDetail(EmployeeDetail employeeDetail) {
        this.employeeDetail = employeeDetail;
    }

    @Override
    public String toString() {
        return "Employee{" +
                "id=" + id +
                ", firstName='" + firstName + '\'' +
                ", lastName='" + lastName + '\'' +
                ", email='" + email + '\'' +
                ", employeeDetail=" + employeeDetail +
                '}';
    }
}

班级employeeDetail

      package ets.entity;

import javax.persistence.*;

@Entity
@Table(name = "employee_detail")
public class EmployeeDetail {

    @Id
    @GeneratedValue(strategy= GenerationType.IDENTITY)
    @Column(name="id")
    private int id;

    @Column(name="work_experience")
    private int workExperience;

    @Column(name="hobby")
    private int hobby;

    @Column(name="language")
    private int language;

    @OneToOne(mappedBy = "employee")
private Employee employee;

    public Employee getEmployee() {
        return employee;
    }

    public void setEmployee(Employee employee) {
        this.employee = employee;
    }

    public EmployeeDetail() {
    }

    public EmployeeDetail(int workExperience, int hobby, int language) {
        this.workExperience = workExperience;
        this.hobby = hobby;
        this.language = language;
    }

    public int getId() {
        return id;
    }

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

    public int getWorkExperience() {
        return workExperience;
    }

    public void setWorkExperience(int workExperience) {
        this.workExperience = workExperience;
    }

    public int getHobby() {
        return hobby;
    }

    public void setHobby(int hobby) {
        this.hobby = hobby;
    }

    public int getLanguage() {
        return language;
    }

    public void setLanguage(int language) {
        this.language = language;
    }

    @Override
    public String toString() {
        return "EmployeeDetail{" +
                "id=" + id +
                ", workExperience=" + workExperience +
                ", hobby=" + hobby +
                ", language=" + language +
                ", employee=" + employee +
                '}';
    }
}

sessiono 工厂有什么问题？如果你需要更多我的代码，我会分享

Answer 1

对于这个错误：

 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ets.config.DemoAppConfig: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Unknown mappedBy in: ets.entity.EmployeeDetail.employee, referenced property unknown: ets.entity.Employee.employee

尝试将EmployeeDetail 中@OneToOne 中的mappedBy 注释更改为：

@OneToOne(mappedBy = "employeeDetail")
private Employee employee;