Spring 启动 + PostgreSQL : Error creating bean with name 'entityManagerFactory' defined in class path resource

Question

我在连接 Spring Boot 和 PostgreSQL 时遇到问题。我似乎无法让它发挥作用。如果有任何遗漏，我可以给你更多，但现在这些信息已经足够了

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 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 

这是我的配置:

应用程序属性:

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;
    }
}

Answer 1

确保您设置了所有这些属性:

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

并且您在类上使用 main() 启用了这些注释:

@Configuration
@EnableAutoConfiguration
@ComponentScan
public class Application {


    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }

}