我正在学习使用Spring Data来访问我的MySQL数据库。由于我是Spring新手并且没有使用Spring Boot，所以我找不到有用的教程。
这是我的build.gradle：
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'org.akhikhl.gretty:gretty:+'
}
}
plugins {
id('io.spring.dependency-management') version('1.0.3.RELEASE')
id 'io.franzbecker.gradle-lombok' version '1.10'
}
group 'com.perqin'
version '1.0.0'
apply plugin: 'java'
apply plugin: 'war'
apply plugin: 'org.akhikhl.gretty'
apply plugin: 'io.spring.dependency-management'
dependencyManagement {
imports {
mavenBom 'org.springframework.data:spring-data-releasetrain:Ingalls-SR6'
}
}
sourceCompatibility = 1.8
repositories {
jcenter()
maven { url 'https://repo.spring.io/libs-release' }
}
dependencies {
compile 'com.fasterxml.jackson.core:jackson-databind:2.9.0'
compile 'mysql:mysql-connector-java:8.0.7-dmr'
compile 'org.hibernate:hibernate-core:5.2.10.Final'
compile 'org.springframework.data:spring-data-jpa:1.11.6.RELEASE'
compile 'org.springframework.data:spring-data-rest-webmvc:2.6.6.RELEASE'
compile 'org.springframework.security:spring-security-config:4.2.3.RELEASE'
compile 'org.springframework.security:spring-security-web:4.2.3.RELEASE'
compile 'org.springframework:spring-webmvc:4.3.10.RELEASE'
testCompile group: 'junit', name: 'junit', version: '4.11'
testCompile group: 'junit', name: 'junit', version: '4.12'
}
这是我的持久性配置：
@Configuration
@EnableJpaRepositories("com.perqin.focus.spring.domain.repositories")
@EnableTransactionManagement
public class PersistenceJpaConfig {
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(Driver.class.getName());
dataSource.setUsername("perqin");
dataSource.setPassword("dev123456");
dataSource.setUrl("jdbc:mysql://localhost:3306/focus_spring?useUnicode=true&characterEncoding=UTF-8");
return dataSource;
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setDatabase(Database.MYSQL);
vendorAdapter.setGenerateDdl(true);
vendorAdapter.setShowSql(true);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan(EntityScanned.class.getPackage().toString());
factory.setDataSource(dataSource());
factory.setJpaProperties(jpaProperties());
return factory;
}
@Bean
PlatformTransactionManager transactionManager() {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
return transactionManager;
}
private Properties jpaProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5InnoDBDialect"); // MySQL5InnoDBDialect MySQLMyISAMDialect
properties.put("hibernate.show_sql", "true");
return properties;
}
}
private Properties jpaProperties() {
Properties properties = new Properties();
properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5InnoDBDialect"); // MySQL5InnoDBDialect MySQLMyISAMDialect
properties.put("hibernate.show_sql", "true");
return properties;
}
}
存储库：
@Repository
public interface UsersRepository extends CrudRepository<User, Long> {
}
但是在启动应用程序后，我得到了这样的输出：
10:27:07 PM: Executing external task 'appRun'...
:prepareInplaceWebAppFolder
:createInplaceWebAppFolder UP-TO-DATE
:compileJava
:processResources
:classes
:prepareInplaceWebAppClasses
:prepareInplaceWebApp
:appRun
22:27:10 INFO 2 Spring WebApplicationInitializers detected on classpath
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
22:27:10 INFO Initializing Spring root WebApplicationContext
22:27:11 WARN Failed startup of context o.a.g.JettyWebAppContext@db57326{/focus.spring,file:/home/perqin/workspaces/Focus/Focus-Server-Spring/build/inplaceWebapp/,STARTING}
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'usersController': Unsatisfied dependency expressed through field 'usersRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.perqin.focus.spring.domain.repositories.UsersRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[na:na]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[na:na]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[na:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[na:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[na:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[na:na]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[na:na]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[na:na]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[na:na]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[na:na]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[na:na]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[na:na]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[na:na]
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:443) ~[na:na]
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:325) ~[na:na]
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107) ~[na:na]
at org.eclipse.jetty.server.handler.ContextHandler.callContextInitialized(ContextHandler.java:800) ~[jetty-server-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.servlet.ServletContextHandler.callContextInitialized(ServletContextHandler.java:444) ~[jetty-servlet-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.server.handler.ContextHandler.startContext(ContextHandler.java:791) ~[jetty-server-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:294) ~[jetty-servlet-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1349) ~[jetty-webapp-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1342) ~[jetty-webapp-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741) ~[jetty-server-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:505) ~[jetty-webapp-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.akhikhl.gretty.JettyWebAppContext.super$10$doStart(JettyWebAppContext.groovy) [gretty-runner-jetty9-2.0.0.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:93) [groovy-2.4.11.jar:2.4.11]
at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325) [groovy-2.4.11.jar:2.4.11]
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1213) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:132) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuper0(ScriptBytecodeAdapter.java:152) [groovy-2.4.11.jar:2.4.11]
at org.akhikhl.gretty.JettyWebAppContext.doStart(JettyWebAppContext.groovy:44) [gretty-runner-jetty9-2.0.0.jar:na]
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) [jetty-util-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) [jetty-util-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) [jetty-util-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) [jetty-server-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:163) [jetty-server-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) [jetty-util-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) [jetty-util-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.server.Server.start(Server.java:387) [jetty-server-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) [jetty-util-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) [jetty-server-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.server.Server.doStart(Server.java:354) [jetty-server-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) [jetty-util-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.eclipse.jetty.util.component.LifeCycle$start$0.call(Unknown Source) [jetty-util-9.2.22.v20170606.jar:9.2.22.v20170606]
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117) [groovy-2.4.11.jar:2.4.11]
at org.akhikhl.gretty.JettyServerManager.startServer(JettyServerManager.groovy:45) [gretty-runner-jetty-2.0.0.jar:na]
at org.akhikhl.gretty.ServerManager$startServer$0.call(Unknown Source) [gretty-runner-2.0.0.jar:na]
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125) [groovy-2.4.11.jar:2.4.11]
at org.akhikhl.gretty.Runner.run(Runner.groovy:117) [gretty-runner-2.0.0.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_144]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_144]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_144]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_144]
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.call(PogoMetaMethodSite.java:71) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113) [groovy-2.4.11.jar:2.4.11]
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:117) [groovy-2.4.11.jar:2.4.11]
at org.akhikhl.gretty.Runner.main(Runner.groovy:44) [gretty-runner-2.0.0.jar:na]
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.perqin.focus.spring.domain.repositories.UsersRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1493) ~[na:na]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104) ~[na:na]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[na:na]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ~[na:na]
... 66 common frames omitted
22:27:11 INFO Jetty 9.2.22.v20170606 started and listening on port 8080
22:27:11 INFO focus.spring runs at:
22:27:11 INFO http://localhost:8080/focus.spring
Press any key to stop the server.
我已经提到了许多示例代码，但我找不到任何重要的差异。