java - Spring Boot - 在类路径资源中创建名称为 'dataSource' 的 bean 时出错

Question

我有 Spring Boot Web 应用程序。它以 RESTful 方法为中心。所有配置似乎都到位，但由于某种原因 MainController 无法处理请求。它会导致 404 错误。如何解决？

@Controller
public class MainController {

    @Autowired
    ParserService parserService;

    @RequestMapping(value="/", method= RequestMethod.GET)
    public @ResponseBody String displayStartPage(){
        return "{hello}";
    }
}

应用程序

@Configuration
@ComponentScan(basePackages = "")
@EnableAutoConfiguration
public class Application extends SpringBootServletInitializer{
        public static void main(final String[] args) {
            SpringApplication.run(Application.class, args);
        }

        @Override
        protected final SpringApplicationBuilder configure(final SpringApplicationBuilder application) {
            return application.sources(Application.class);
        }
}

ParserController

@RestController
public class ParserController {

    @Autowired
    private ParserService parserService;

    @Autowired
    private RecordDao recordDao;

 private static final Logger LOG = Logger.getLogger(ParserController.class);

    @RequestMapping(value="/upload", method= RequestMethod.POST)
    public @ResponseBody String fileUploadPage(
   }
}

更新

好像 MySQL 不能被 Spring 初始化......

    Caused by: 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.

更新2

application.properties

    # Database 
    spring.datasource.driverClassName = com.mysql.jdbc.Driver
    spring.datasource.url = jdbc:mysql://localhost:3306/logparser
    spring.datasource.username = root
    spring.datasource.password = root
    
    spring.jpa.database = MYSQL
    spring.jpa.show-sql = true
    
    # Hibernate
    hibernate.dialect: org.hibernate.dialect.MySQL5Dialect
    hibernate.show_sql: true
    hibernate.hbm2ddl.auto: update
    entitymanager.packagesToScan: /

UPDATE4

即使 @RequestMapping 已设置，似乎 lite Controller 也没有响应。为什么会这样？

PS. It occurs when I run Maven's lifecycle test. When running in degub mode in IntelliJ there is no error outputted.

UPDATE5

我也按照教程中的说明使用这个 DAO....

public interface RecordDao extends CrudRepository<Record, Long> {
}

http://blog.netgloo.com/2014/10/27/using-mysql-in-spring-boot-via-spring-data-jpa-and-hibernate/

UPDATE6

我确实更改了我的应用程序属性。并尝试了每一种组合，但它拒绝工作。 ;(

Maven 输出:

-------------------------------------------------------
 T E S T S
-------------------------------------------------------
Running IntegrationTest
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.365 sec <<< FAILURE! - in IntegrationTest
saveParsedRecordsToDatabase(IntegrationTest)  Time elapsed: 2.01 sec  <<< ERROR!
java.lang.IllegalStateException: Failed to load ApplicationContext
    at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContext(CacheAwareContextLoaderDelegate.java:99)
    at org.springframework.test.context.DefaultTestContext.getApplicationContext(DefaultTestContext.java:101)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:109)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:331)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:213)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:290)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:292)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:233)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:87)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:176)
    at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:264)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:124)
    at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private javax.sql.DataSource org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.dataSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceAutoConfiguration$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.

Answer 1

看起来最初的问题在于自动配置。

如果您不需要数据源，只需将其从自动配置过程中删除:

@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})

编辑: 如果在你的主类中使用@SpringBootApplication:

@SpringBootApplication(exclude={DataSourceAutoConfiguration.class})