Spring 弹簧靴&x2B;PostgreSQL:创建名为';实体管理工厂&x27;在类路径资源中定义
我在将Spring Boot与PostgreSQL连接时遇到问题。我似乎无法让它工作。如果有什么遗漏,我可以给你更多,但现在这是足够的信息 完整错误:Spring 弹簧靴&x2B;PostgreSQL:创建名为';实体管理工厂&x27;在类路径资源中定义,spring,postgresql,spring-boot,Spring,Postgresql,Spring Boot,我在将Spring Boot与PostgreSQL连接时遇到问题。我似乎无法让它工作。如果有什么遗漏,我可以给你更多,但现在这是足够的信息 完整错误: Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.2.RELEASE:run (default-cli) on project resorts-restful-project: An exception occurred while runni
Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:1.5.2.RELEASE:run (default-cli) on project resorts-restful-project: An exception occurred while running. null: InvocationTargetException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
以下是我的配置:
application.properties:
spring.datasource.url= jdbc:postgresql://localhost:5433/qwerty
spring.datasource.username=postgres spring.datasource.password=postgres@qwerty
spring.jpa.hibernate.ddl-auto=create-drop
我的模型:
package com.fvthree.domain;
import javax.persistence.*;
import java.io.Serializable;
@Entity
public class Resort implements Serializable {
@Id
@GeneratedValue
@Column(name="resorts_id")
private Long id;
@Column(name="name")
private String name;
@Column(name="location")
private String location;
@Column(name="contact_id")
private Long contactId;
public Resort() {
}
public Resort(Long id, String name, String location, Long contactId) {
this.id = id;
this.name = name;
this.location = location;
this.contactId = contactId;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getLocation() {
return location;
}
public void setLocation(String location) {
this.location = location;
}
public Long getContactId() {
return contactId;
}
public void setContactId(Long contactId) {
this.contactId = contactId;
}
}
确保已设置所有这些属性:
spring.datasource.driverClassName=org.postgresql.Driver
spring.datasource.url=
spring.datasource.username=
spring.datasource.password=
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
spring.jpa.show-sql=false
spring.jpa.hibernate.ddl-auto=create-drop
在main()类上启用了这些注释:
我已经解决了这个问题 application.properties文件需要完整:
# Configure postgres
spring.jpa.database=POSTGRESQL
spring.datasource.platform=postgres
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=create-drop
spring.database.driverClassName=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5432/qweqwe
spring.datasource.username=postgres
spring.datasource.password=dontcopythis
我还将@EntityScan和@EnableJpaRepositories添加到主目录中:
package com.fvthree;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
@SpringBootApplication
@EntityScan(basePackages = {"com.fvthree.domain" })
@EnableJpaRepositories(basePackages = {"com.fvthree.repository"})
public class ResortsRestfulProjectApplication {
public static void main(String[] args) {
SpringApplication.run(ResortsRestfulProjectApplication.class, args);
}
}
(1) 在文件application.properties
中,请注意spring.datasource.username=postgres-spring.datasource.password=postgres@qwerty
是两行,而不是一行
(2) 由于此错误:
在以下情况下,对方言解析信息的访问不能为空:
未设置“hibernate.dialogue”
你失踪了
hibernate.dia方言=…
例如,如果使用PostgreSQL 9.5,则
hibernate.dialogue=org.hibernate.dialogue.postgresql95dialogue
参考资料:有没有办法让org.hibernate.dialent.postgresql95dialent使用spring启动程序数据jpa:1.5.3.RELEASE?它不包含hibernate的版本,而hibernate的版本应该是这样的。您应该使用最新的PostgreSQL版本,然后使用
org.hibernate.dialent.PostgreSQL95dialent
notorg.hibernate.dialent.PostgreSQLdialent
Spring Boot 1.5.3.RELEASE使用hibernate托管依赖版本5.0.12.Final。请参阅:(hibernate orm部分),您必须覆盖托管依赖项版本。但这会使应用程序不稳定。
package com.fvthree;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
@SpringBootApplication
@EntityScan(basePackages = {"com.fvthree.domain" })
@EnableJpaRepositories(basePackages = {"com.fvthree.repository"})
public class ResortsRestfulProjectApplication {
public static void main(String[] args) {
SpringApplication.run(ResortsRestfulProjectApplication.class, args);
}
}