我正在尝试构建一个使用 2 个数据源的 Spring Boot 应用程序。我现在的主要数据库是内存数据库（仅用于测试目的），其中的表是在我创建的 sql 文件的帮助下填充的。另一个数据库（oracledb）具有已填充的表。
我想实现什么目标？我正在尝试从 oracledb 中提取数据，对其进行处理并填充 h2 数据库中的表。
我面临的问题是什么？我只希望 h2 数据库的实体被创建为 in-mem 数据库中的表（我希望能够指定 h2 要扫描和创建表的实体，而不是所有具有@Entity注解）。所有有的班级@Entity在我的内存数据库中创建为表，这就是我试图避免的。
我尝试了什么？我为属于 h2 和 oracledb 的实体创建了两个单独的包，并使用@EntityScan我只扫描了包含 h2 实体的包。这有效，但是，我需要扫描 oracledb 的其他实体，以便我能够使用它们。
我所拥有的代码片段：
我的 applications.properties 文件
#spring.jpa.hibernate.ddl-auto=none
spring.jpa.generate-ddl=true
spring.h2.console.enabled=true
spring.h2.console.path=/h2
# first data source
spring.datasource.url=jdbc:h2:mem:mydb
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.application.name=Health Monitor
## 2nd data source
spring.production-datasource.url= jdbc:oracle://localhost:3306/db2
spring.production-datasource.driverClassName=oracle.jdbc.driver.OracleDriver
spring.production-datasource.username=abcd
spring.production-datasource.password=xyz123
演示应用程序.java
package com.automation.demo;
import java.sql.SQLException;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.Bean;
@SpringBootApplication
//@EntityScan( basePackages = {"domain"} )
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
@Bean(initMethod = "start", destroyMethod = "stop")
public org.h2.tools.Server inMemoryH2DatabaseaServer() throws SQLException {
return org.h2.tools.Server.createTcpServer(
"-tcp", "-tcpAllowOthers", "-tcpPort", "9090");
}
}
配置数据库.java
package com.automation.demo.configurations;
import javax.sql.DataSource;
import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import com.zaxxer.hikari.HikariDataSource;
@Configuration
public class ConfigureDB {
@Primary
@Bean
@ConfigurationProperties(prefix="spring.datasource")
public DataSourceProperties devDataSourceProperties() {
return new DataSourceProperties();
}
@Bean
@Primary
@ConfigurationProperties("spring.datasource.configuration")
public DataSource devDataSource() {
return devDataSourceProperties().initializeDataSourceBuilder()
.type(HikariDataSource.class).build();
}
@Bean
@ConfigurationProperties("spring.production-datasource")
public DataSourceProperties productionDataSourceProperties() {
return new DataSourceProperties();
}
@Bean
@ConfigurationProperties("spring.production-datasource.configuration")
public DataSource productionDataSource() {
return productionDataSourceProperties().initializeDataSourceBuilder()
.type(HikariDataSource.class).build();
}
}
员工.java（对于h2数据库）
package com.automation.demo.dev.entities;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="test")
public class Employee {
// define fields
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="ID")
private int id;
@Column(name="FirstName")
private String firstName;
@Column(name="LastName")
private String lastName;
@Column(name="Email")
private String email;
// define constructors
public Employee() {
}
public Employee(String firstName, String lastName, String email) {
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
}
// define getter/setter
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;
}
// define tostring
@Override
public String toString() {
return "Employee [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + "]";
}
}
客户信息.java（这是代表oracledb中表的实体，我想阻止在h2数据库中创建代表该实体的表）
package com.automation.demo.production.entities;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="customer")
public class CustomerInfo {
// define fields
@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="ID")
private int id;
@Column(name="FirstName")
private String firstName;
@Column(name="LastName")
private String lastName;
@Column(name="Email")
private String email;
// define constructors
public CustomerInfo() {
}
public CustomerInfo(String firstName, String lastName, String email) {
this.firstName = firstName;
this.lastName = lastName;
this.email = email;
}
// define getter/setter
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;
}
// define tostring
@Override
public String toString() {
return "Customer [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", email=" + email + "]";
}
}
如果我错过了什么，请告诉我。另外，如果我犯了任何其他错误，但与我当前的问题无关，请也指出这些错误。
Thanks.
