我試圖學習spring-boot基本註釋配置與hiberanate,使自己的模板,將始終工作。 我使用STS(彈簧工具套件)3.8.3上的spring-boot最新版本1.51。春季啓動+休眠 - 實體未映射+配置的最佳方式
這裏是我的主:
@SpringBootApplication
@EnableAutoConfiguration
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
現在
,我知道@SpringBootApplication automaticaly自帶@componetScan, 所以我沒有加入它。
我的配置類:
@Configuration
@EnableTransactionManagement
@EnableJpaRepositories(entityManagerFactoryRef = "someEntityManagerFactory", transactionManagerRef = "someTransactionManager", basePackages = {
"com.example.*" })
@EntityScan(basePackages = "com.demo.models")
@ConfigurationProperties(prefix = "mysql.datasource")
public class DataBaseConfig {
@Autowired
private Environment env;
@Bean
public DataSource someDataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("mysql.datasource.driver-class-name"));
dataSource.setUrl(env.getProperty("mysql.datasource.url"));
dataSource.setUsername(env.getProperty("mysql.datasource.username"));
dataSource.setPassword(env.getProperty("mysql.datasource.password"));
return dataSource;
}
@Bean
public LocalContainerEntityManagerFactoryBean someEntityManagerFactory() {
LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
em.setDataSource(someDataSource());
em.setPackagesToScan(new String[] { "org.openlegacy.analytics.models" });
JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
em.setJpaVendorAdapter(vendorAdapter);
em.setJpaProperties(additionalProperties());
return em;
}
@Bean
public PlatformTransactionManager someTransactionManager() {
JpaTransactionManager tm = new JpaTransactionManager();
tm.setEntityManagerFactory(someEntityManagerFactory().getObject());
tm.setDataSource(someDataSource());
return tm;
}
Properties additionalProperties() {
Properties properties = new Properties();
properties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("spring.jpa.hibernate.ddl-auto"));
properties.setProperty("hibernate.dialect", env.getProperty("spring.jpa.properties.hibernate.dialect"));
properties.setProperty("spring.jpa.show-sql", env.getProperty("spring.jpa.show-sql"));
properties.setProperty("spring.jpa.hibernate.naming.physical-strategy",
env.getProperty("spring.jpa.hibernate.naming.physical-strategy"));
return properties;
}
}
我的控制器類
我的倉庫類
@Transactional
@Repository
public class UserRepository {
@PersistenceContext
private EntityManager entityManager;
@SuppressWarnings("unchecked")
public List<User> getUsers() {
return entityManager.createQuery("select u from User u").getResultList();
}
public String getMessage() {
return "hello";
}
}
我的實體類
@Entity(name = "user")
public class User implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
@Column(name = "user_name")
private String userName;
@Column(name = "password")
private String password;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
和我的屬性文件
# DataSource settings: set here your own configurations for the database connection.
mysql.datasource.username=openlegacy
mysql.datasource.password=openlegacy
mysql.datasource.driver-class-name=com.mysql.jdbc.Driver
mysql.datasource.url=jdbc:mysql://localhost:3306/olbank
spring.jpa.database= MYSQL
spring.data.jpa.repositories.enabled=true
#spring.jpa.database-platform=org.hibernate.dialect.MYSQL5Dialect
# Show or not log for each sql query
spring.jpa.show-sql = true
# Hibernate ddl auto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto = update
# Naming strategy
#spring.jpa.hibernate.naming.strategy= org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.hibernate.naming.physical-strategy= org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
,當我綁到從用戶表reteive數據 我收到此錯誤:
org.hibernate.hql.internal.ast.QuerySyntaxException: User is not mapped...
我的問題是:
- 爲什麼我得到這個錯誤?我知道該用戶是由 類名稱映射的,這就是我正在做的。
- 這是用spring-boot配置hibernate的最佳方法嗎?通過最佳實踐編寫代碼對我來說非常重要。
請給出詳細的答案,以便我可以從中學習。 任何其他可用的信息,歡迎:) 謝謝。
您的@EntityScan註釋表示basePackages =「com.demo.models」。您的用戶實體是否在該包中? –
是的,它在「com.demo.models」包中 - @M。 Rizzo –
太好了。你的DemoApplication包含什麼包? –