我得到别的什么时候开始申请春季启动下面的错误。
应用程序未能启动
描述:
在com.base.model.AbstractDao现场会话所需类型的bean的org.hibernate.SessionFactory实例“,可能不会被发现。
行动:
考虑配置中的定义类型的豆“org.hibernate.SessionFactory实例”。
我已经加入执行我的应用程序:
的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>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.2.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Hibernate dependency -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.1.5.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.0.3.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
application.property
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username = root
spring.datasource.password = root
hibernate.dialect = org.hibernate.dialect.MySQLDialect
spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate4.SpringSessionContext
配置类
@Configuration
@EnableTransactionManagement
@ComponentScan({"configure"})
@PropertySource({"classpath:application.properties"})
public class HibernateConfiguration {
@Autowired
private Environment environment;
@Bean
public LocalSessionFactoryBean sessionFactory(){
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(dataSource());
sessionFactory.setPackagesToScan(new String[]{"com.base","com.base.model"});
sessionFactory.setMappingResources(new String[]{"Employee.hbm.xml"});
sessionFactory.setHibernateProperties(hibernateProperties());
return sessionFactory;
}
@Bean
public Properties hibernateProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
properties.put("hibernate.show_sql", environment.getRequiredProperty("hiberante.show_sql"));
properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
return properties;
}
@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.setUsername(environment.getRequiredProperty("jdbc.password"));
return dataSource;
}
@Bean
public SessionFactory sessionFactory(HibernateEntityManagerFactory hemf){
return hemf.getSessionFactory();
}
}
Employee.java
public class Employee implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
private int id;
private String name;
private String country;
public int getId(){
return this.id;
}
public void setId(int id){
this.id = id;
}
public String getName(){
return this.name;
}
public void setName(String name){
this.name = name;
}
public void setCountry(String country){
this.country = country;
}
public String getCountry(){
return this.getCountry();
}
@Override
public String toString() {
return "Employee [id=" + id + ", name=" + name + ", country="
+ country + "]";
}
}
Employee.hbm.xml
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.base.model.Employee" table="Person">
<id name="id" type="java.lang.Integer">
<generator class="native"></generator>
</id>
<property name="name" type="java.lang.String">
<column name="name" not-null="true"></column>
</property>
<property name="country" type="java.lang.String">
<column name="country"></column>
</property>
</class>
</hibernate-mapping>
EmployeeDaoImpl
@Component
public class EmployeeDataDaoImpl {
@Autowired
SessionFactory sessionFactory;
public List<Employee> findAllEmployee(){
//// Criteria cri = getSession().createCriteria(Employee.class);
// List<Employee> dbList = cri.list();
// for (Employee employee : dbList) {
// System.out.println(employee.getCountry());
// }
return null;
}
}
我已经看过了计算器上相同的错误代码,但没有一个解决方案的工作,所以在这里再次与我的代码张贴。其他希望有人能指出我要去的地方错了。
对于初学者有您的配置有几个事情
对于1和2只是删除<version>
了标签spring-orm
和hibernate-core
和hibernate-entitymanager
经理的依赖。春季启动已经管理这些。实际上,你可以删除所有org.springframework
这些都已经在由起动器(实际上是休眠的人也)拉的依赖。
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
接下来,在你的配置至少有2 SessionFactory
的配置。我会建议使用注释来定义实体,而不是hbm.xml
文件。
@Entity
@Table("person")
public class Employee implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue
private int id;
@Column(nullable=false)
private String name;
private String country;
}
当使用JPA注解Hibernate会自动检测您的实体(尤其是春季引导相结合),这使得它非常强大。Ofcourse您现在可以删除Employee.hbm.xml
。
接下来你EmployeeDataDaoImpl
我强烈建议在使用Hibernate使用纯JPA。一般来说,对于您提供足够的与工作。
@Repository
public class EmployeeDataDaoImpl {
@PersistenceContext
private EntityManager entityManger;
public List<Employee> findAllEmployee(){
return em.createQuery("select e from Employee e", Employee.class).getResultList();
}
}
有了这个设置你基本上可以完全删除你的HibernateConfiguration
。是的,你可以像春天开机检测休眠和自动创建JpaTransactionManager
,使交易和预配置一个EntityManagerFactory
。
如果你真的想使用纯休眠与SessionFactory
只使用一个HibernateJpaSessionFactoryBean
,露出底层SessionFactory
的EntityManagerFactory
。
@Bean
public HibernateJpaSessionFactoryBean sessionFactory(EntityManagerFactory emf) {
HibernateJpaSessionFactoryBean factory = new HibernateJpaSessionFactoryBean();
factory.setEntityManagerFactory(emf);
return factory;
}
但是如前所述,我会强烈建议使用纯JPA,因为这是一个更容易安装和使用JPA的当前状态,它提供了多达近的功能直接使用Hibernate一样。
专业提示你有依赖spring-boot-starter-data-jpa
,这意味着你正在对春数据JPA的依赖。这将使事情,即使你将使用JPA更加容易。您可以移除EmployeeDataDaoImpl
,只是创建一个接口并使用它。
public interface EmployeeRepository extends JpaRepository<Employee, Long> {}
这就是它,所有的CRUD方法(findOne
,findAll
,save
提供等)为您无需您创建一个实现。
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