Java BeanCreationException：无法确定数据库类型 NONE 的嵌入式数据库驱动程序类

BeanCreationException: Cannot determine embedded database driver class for database type NONE

提问by Mathias Mahlknecht

I'm trying to run my program, I always get this exception:

我正在尝试运行我的程序，但总是遇到此异常：

Caused by: org.springframework.beans.factory.BeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath.
at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.getDriverClassName(DataSourceProperties.java:137)
at org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$NonEmbeddedConfiguration.dataSource(DataSourceAutoConfiguration.java:117)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
... 45 more

I'm importing all dependencies via gradle:

我正在通过 gradle 导入所有依赖项：

buildscript {
repositories {
    mavenCentral()
}
dependencies {
    classpath("org.springframework.boot:spring-boot-gradle-plugin:1.2.7.RELEASE")
}
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'spring-boot'

jar {
baseName = 'flatify-backend-service'
version =  '0.1.0'
}

repositories {
mavenCentral()
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

dependencies {
compile("org.springframework.boot:spring-boot-starter-web")
compile 'org.springframework.boot:spring-boot-starter-data-jpa'
compile 'org.hibernate:hibernate-core:4.3.6.Final'
compile 'javax.servlet:javax.servlet-api:3.1.0'
compile 'org.javassist:javassist:3.15.0-GA'
compile 'mysql:mysql-connector-java:5.1.31'
compile 'commons-dbcp:commons-dbcp:1.4'
testCompile("junit:junit")
testCompile("org.springframework:spring-test")
}

task wrapper(type: Wrapper) {
gradleVersion = '2.5'
}

As you can see I'm adding the mysql-connector isn't that what's supposed to add the driver classes to my project? Am I missing something?

如您所见，我添加的 mysql-connector 不是应该将驱动程序类添加到我的项目吗？我错过了什么吗？

I only added to last exception, because all others are caused by this one. If you need any other details please let my know.

我只添加了最后一个异常，因为所有其他异常都是由这个异常引起的。如果您需要任何其他详细信息，请告诉我。

Thanks

谢谢

My Config class:

我的配置类：

@Configuration
@EnableTransactionManagement
public class PersistenceJPAConfig {

@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
    LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
    em.setDataSource(dataSource());
    em.setPackagesToScan(new String[] { "at.flatify.persistance.entity" });

    JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
    em.setJpaVendorAdapter(vendorAdapter);
    em.setJpaProperties(additionalProperties());

    return em;
}


@Bean(destroyMethod = "close")
public DataSource dataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();
    dataSource.setDriverClassName("com.mysql.jdbc.Driver");
    dataSource.setUrl("jdbc:mysql://localhost:3306/flatify");
    dataSource.setUsername("user");
    dataSource.setPassword("password");

    return dataSource;
}

@Bean
public PlatformTransactionManager transactionManager(EntityManagerFactory emf){
    JpaTransactionManager transactionManager = new JpaTransactionManager();
    transactionManager.setEntityManagerFactory(emf);

    return transactionManager;
}

@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation(){
    return new PersistenceExceptionTranslationPostProcessor();
}

Properties additionalProperties() {
    Properties properties = new Properties();
    properties.setProperty("hibernate.hbm2ddl.auto", "create-drop");
    properties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
    return properties;
}

}

回答by Daniel Burrell

Spring boot is unable to determine which driver to use. You need to specify the following property somewhere: spring.datasource.driverClassName There are other properties which you will need to specify, check the documentation.

Spring boot 无法确定使用哪个驱动程序。您需要在某处指定以下属性： spring.datasource.driverClassName 您还需要指定其他属性，请查看文档。

回答by Ishan Joshi

I Faced the same Problem, I solved it by simply adding an eclipselink-javax.persistence-2.0 jar in the classpath of my project. you can download it from the link given below. or simply add the add the following dependency

我遇到了同样的问题，我通过简单地在我的项目的类路径中添加一个 eclipselink-javax.persistence-2.0 jar 来解决它。你可以从下面给出的链接下载它。或者简单地添加添加以下依赖项

<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>javax.persistence</artifactId>
<version>2.0.0</version>
</dependency>

Jar download Link

Jar下载链接