Spring BootBean异常：无法确定数据库类型NONE的嵌入式数据库驱动程序类

Question

我正在尝试运行一个由其他人制作的Spring Boot应用程序。我曾尝试将本地数据库附加到应用程序,但当我运行该应用程序时,它会出现以下错误；

工作台：

Name: Local instance wampmysqld64
Host: localhost
Port: 3306
Server: MySQL Community Server (GPL)
Version: 5.7.18-log
Connector: C++ 1.1.4 
Login User: root
Current User: root@localhost
SSL: Disabled

并且服务器已启动并运行。

编辑

<project>

<modelVersion>4.0.0</modelVersion>

<groupId>****</groupId>
<artifactId>****</artifactId>
<version>0.0.1-SNAPSHOT</version>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.3.6.RELEASE</version>
</parent>

<dependencies>
    <dependency>
      <groupId>org.modelmapper</groupId>
      <artifactId>modelmapper</artifactId>
      <version>1.1.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-rest</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
       <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

</project>

spring.datasource.url=jdbc:mysql://localhost:3306/xxx
spring.datasource.username=root
spring.datasource.password=root

spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQLDialect
spring.jpa.properties.hibernate.id.new_generator_mappings = false
spring.jpa.properties.hibernate.format_sql = true
logging.level.org.hibernate.SQL=DEBUG
logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE 

package gdprserver;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.data.rest.RepositoryRestMvcAutoConfiguration;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;
import org.springframework.context.annotation.Bean;

@SpringBootApplication(exclude = RepositoryRestMvcAutoConfiguration.class)
public class Application extends SpringBootServletInitializer {
    @Override
    protected SpringApplicationBuilder configure(final SpringApplicationBuilder application) {
        return application.sources(Application.class);
    }

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

    @Bean
    public ModelMapper modelMapper() {
        return new ModelMapper();
    }
}

Answer 1

异常“无法确定数据库类型None的嵌入式数据库驱动程序类。”是由于Spring找不到定义数据库的属性造成的。它告诉我们它没有创建/配置数据源所必需的信息。

有可能是IDE相关的问题。使用maven构建jar并尝试运行它。如果您得到相同的异常，打开罐子并查看它的内部，以确保正确添加了它。