这是尝试运行我的Web应用程序时抛出的错误：
[INFO] WARNING: Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.dataSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceAutoConfiguration$NonEmbeddedConfiguration.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public javax.sql.DataSource org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$NonEmbeddedConfiguration.dataSource()] threw exception; nested exception is 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.: [INFO] 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. [INFO] at org.springframework.boot.autoconfigure.jdbc.DataSourceProperties.getDriverClassName(DataSourceProperties.java:91) [INFO] at org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration$NonEmbeddedConfiguration.dataSource(DataSourceAutoConfiguration.java:100) [INFO] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [INFO] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [INFO] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [INFO] at java.lang.reflect.Method.invoke(Method.java:606) [INFO] at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:115) [INFO] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166) [INFO] at org.springframework.beans.factory.support.ConstructorResolver$3.run(ConstructorResolver.java:580) [INFO] at java.security.AccessController.doPrivileged(Native Method) [INFO] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:577) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1094) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:989) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304) [INFO] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) [INFO] at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1017) [INFO] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:960) [INFO] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858) [INFO] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480) [INFO] at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) [INFO] at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304) [INFO] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) [INFO] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:370) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1094) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:989) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504) [INFO] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304) [INFO] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) [INFO] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) [INFO] at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:973) [INFO] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:750) [INFO] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) [INFO] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:683) [INFO] at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [INFO] at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:142) [INFO] at org.springframework.boot.legacy.context.web.SpringBootContextLoaderListener.initWebApplicationContext(SpringBootContextLoaderListener.java:60) [INFO] at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) [INFO] at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548) [INFO] at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) [INFO] at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) [INFO] at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) [INFO] at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) [INFO] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) [INFO] at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) [INFO] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) [INFO] at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) [INFO] at org.mortbay.jetty.Server.doStart(Server.java:224) [INFO] at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) [INFO] at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:249) [INFO] at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:306) [INFO] at com.google.appengine.tools.development.AutomaticInstanceHolder.startUp(AutomaticInstanceHolder.java:26) [INFO] at com.google.appengine.tools.development.AbstractModule.startup(AbstractModule.java:79) [INFO] at com.google.appengine.tools.development.Modules.startup(Modules.java:88) [INFO] at com.google.appengine.tools.development.DevAppServerImpl.doStart(DevAppServerImpl.java:254) [INFO] at com.google.appengine.tools.development.DevAppServerImpl.access$000(DevAppServerImpl.java:47) [INFO] at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:212) [INFO] at com.google.appengine.tools.development.DevAppServerImpl$1.run(DevAppServerImpl.java:210) [INFO] at java.security.AccessController.doPrivileged(Native Method) [INFO] at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:210) [INFO] at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:277) [INFO] at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48) [INFO] at com.google.appengine.tools.development.DevAppServerMain.run(DevAppServerMain.java:219) [INFO] at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:210)
我相信我datanucleus-appengine和datanucleusjar的搭配正确：
datanucleus-appengine
datanucleus
2.1：需要DataNucleus 3.1.x（核心，api-jdo，api-jpa，增强器）。需要SDK 1.6.4+。请注意，DataNucleus项目不再支持此版本的Datanucleus
JPA应用程序配置：
@Configuration @EnableJpaRepositories("demo.core.entity") @EnableTransactionManagement class JpaApplicationConfig { private static final Logger logger = Logger .getLogger(JpaApplicationConfig.class.getName()); @Bean public AbstractEntityManagerFactoryBean entityManagerFactory() { logger.info("Loading Entity Manager..."); LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean(); factory.setPersistenceUnitName("transactions-optional"); return factory; } @Bean public PlatformTransactionManager transactionManager() { logger.info("Loading Transaction Manager..."); JpaTransactionManager txManager = new JpaTransactionManager(); txManager.setEntityManagerFactory(entityManagerFactory().getObject()); return txManager; } @Bean public PersistenceExceptionTranslator persistenceExceptionTranslator() { return new OpenJpaDialect(); } }
应用程序
@Configuration @ComponentScan @EnableAutoConfiguration @RestController public class Application { private static final EntityManagerFactory INSTANCE = Persistence.createEntityManagerFactory("transactions-optional"); public static void main(String[] args) { SpringApplication.run(Application.class, args); } @RequestMapping("/") public String home() { return "Hello World"; } }
POM：
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="..."> <modelVersion>4.0.0</modelVersion> <groupId>org.demohq</groupId> <artifactId>demo-boot</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name>demo-boot</name> <description>Demo project</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.1.0.BUILD-SNAPSHOT</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-legacy</artifactId> <version>1.1.0.BUILD-SNAPSHOT</version> </dependency> <!--<dependency>--> <!--<groupId>net.kindleit</groupId>--> <!--<artifactId>gae-runtime</artifactId>--> <!--<version>${gae.version}</version>--> <!--<type>pom</type>--> <!--<scope>provided</scope>--> <!--</dependency>--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> </dependency> <!--<dependency>--> <!--<groupId>org.hsqldb</groupId>--> <!--<artifactId>hsqldb</artifactId>--> <!--<scope>runtime</scope>--> <!--</dependency>--> <dependency> <groupId>com.google.appengine</groupId> <artifactId>appengine-api-labs</artifactId> <version>${gae.version}</version> <scope>test</scope> </dependency> <dependency> <groupId>com.google.appengine</groupId> <artifactId>appengine-api-stubs</artifactId> <version>${gae.version}</version> <scope>test</scope> </dependency> <dependency> <groupId>com.google.appengine</groupId> <artifactId>appengine-testing</artifactId> <version>${gae.version}</version> <scope>test</scope> </dependency> <!-- DataNucleus --> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-api-jpa</artifactId> <version>${datanucleus.jpa.version}</version> </dependency> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-core</artifactId> <version>${datanucleus.jpa.version}</version> </dependency> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-enhancer</artifactId> <version>${datanucleus.jpa.version}</version> </dependency> <dependency> <groupId>com.google.appengine.orm</groupId> <artifactId>datanucleus-appengine</artifactId> <version>${datanucleus.version}</version> <!-- Need to exclude the enhancer since it interfere with the enhancer plugin. --> <exclusions> <exclusion> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-enhancer</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>javax.jdo</groupId> <artifactId>jdo-api</artifactId> <version>3.0.1</version> </dependency> <dependency> <groupId>org.apache.geronimo.specs</groupId> <artifactId>geronimo-jpa_2.0_spec</artifactId> <version>1.1</version> </dependency> <!-- OpenJPA --> <dependency> <groupId>org.apache.openjpa</groupId> <artifactId>openjpa-persistence</artifactId> <version>2.3.0</version> </dependency> </dependencies> <properties> <start-class>demo.Application</start-class> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.7</java.version> <m2eclipse.wtp.contextRoot>/</m2eclipse.wtp.contextRoot> <datanucleus.jpa.version>3.1.1</datanucleus.jpa.version> <datanucleus.version>2.1.2</datanucleus.version> <gae.version>1.8.8</gae.version> <gae.home>${settings.localRepository}/com/google/appengine/appengine-java-sdk/${gae.version}/appengine-java-sdk/appengine-java-sdk-${gae.version}</gae.home> <gae.application.version>test</gae.application.version> <!--<org.springframework-version>4.0.5.RELEASE</org.springframework-version>--> </properties> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <!-- <plugin> <groupId>net.kindleit</groupId> <artifactId>maven-gae-plugin</artifactId> <version>0.9.6</version> <dependencies> <dependency> <groupId>net.kindleit</groupId> <artifactId>gae-runtime</artifactId> <version>${gae.version}</version> <type>pom</type> </dependency> </dependencies> </plugin> --> <plugin> <groupId>com.google.appengine</groupId> <artifactId>appengine-maven-plugin</artifactId> <version>${gae.version}</version> <configuration> <enableJarClasses>false</enableJarClasses> </configuration> </plugin> <plugin> <artifactId>maven-release-plugin</artifactId> <configuration> <goals>gae:deploy</goals> </configuration> </plugin> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat6-maven-plugin</artifactId> <version>2.0</version> <configuration> <path>/</path> </configuration> </plugin> <plugin> <groupId>org.datanucleus</groupId> <artifactId>maven-datanucleus-plugin</artifactId> <version>${datanucleus.jpa.version}</version> <configuration> <api>JPA</api> <!--<mappingIncludes>**/entity/*.class</mappingIncludes>--> <verbose>true</verbose> </configuration> <dependencies> <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-core</artifactId> <version>${datanucleus.jpa.version}</version> </dependency> </dependencies> <executions> <execution> <phase>compile</phase> <goals> <goal>enhance</goal> </goals> </execution> </executions> </plugin> </plugins> </build> <profiles> <!-- We can configure our integration server to activate this profile and perform gae:deploy, thus uploading latest snapshot to the http://1.latest.<applicationName>.appspot.com automatically --> <profile> <id>integration-build</id> <properties> <gae.application.version>stage</gae.application.version> </properties> </profile> <!-- This profile will activate automatically during release and upload application to the http://2.latest.<applicationName>.appspot.com (We might want to set the 2nd version as our applications Default version to be accessible at http://<applicationName>.appspot.com) --> <profile> <id>release-build</id> <activation> <property> <name>performRelease</name> <value>true</value> </property> </activation> <properties> <!-- During release, set application version in appengine-web.xml to 2 --> <gae.application.version>release</gae.application.version> </properties> </profile> </profiles> <repositories> <repository> <id>spring-snapshots</id> <name>Spring Snapshots</name> <url>http://repo.spring.io/snapshot</url> <snapshots> <enabled>true</enabled> </snapshots> </repository> <repository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>http://repo.spring.io/milestone</url> <snapshots> <enabled>false</enabled> </snapshots> </repository> </repositories> <pluginRepositories> <pluginRepository> <id>spring-snapshots</id> <name>Spring Snapshots</name> <url>http://repo.spring.io/snapshot</url> <snapshots> <enabled>true</enabled> </snapshots> </pluginRepository> <pluginRepository> <id>spring-milestones</id> <name>Spring Milestones</name> <url>http://repo.spring.io/milestone</url> <snapshots> <enabled>false</enabled> </snapshots> </pluginRepository> </pluginRepositories> </project>
我想知道我的应用程序中可能缺少什么？我按照此处的说明在Google Appengine上使用Spring Data JPA
你没有为Spring Boot提供足够的信息来自动配置DataSource。为此，你需要application.properties使用spring.datasource前缀添加一些属性。查看DataSourceProperties，以查看可以设置的所有属性。
DataSource
application.properties
spring.datasource
DataSourceProperties
你需要提供适当的url和驱动程序类名称：
spring.datasource.url = … spring.datasource.driver-class-name = …
