我在springboot + hibernate中正确设置H2数据库时遇到问题，非常感谢您的帮助。我想我的问题出现在@Transaction Annotation中，因为相应的类会抛出NullPointerException。以下是一些背景信息：
程序的想法（尚未完成）是代理（类“AgentLogic”）可以计算多代理系统中特定任务的价格。为了计算价格，代理从数据库中提取参数。某些机器学习算法（在“MachineLearningSource”类中）需要这些参数，这将计算代理的价格。
我想在不使用XML文件的情况下设置数据库的配置，类似于http://www.baeldung.com/hibernate-4-spring中的示例
该项目具有以下结构：
包含@StanislavL变更后的更新代码
该项目在SpringBoot中实现。因此，我使用以下Application类：
package org.schlago.mldb;
import...
@SpringBootApplication
public class Application {
public static void main(String[] args) {
// ConfigurableApplicationContext context = SpringApplication.run(Application.class, args);
SpringApplicationBuilder builder = new SpringApplicationBuilder(Application.class);
builder.headless(false);
ConfigurableApplicationContext context = builder.run(args);
}
}
以下类包含Spring Hibernate中数据库的配置，名为DataBaseConfig：
package org.schlago.mldb.database;
import...
@Configuration
@Profile("param_db")
@EnableTransactionManagement
@ComponentScan({"org.schlago.mldb.mapping","org.schlago.mldb.machineLearning"})
public class DatabaseConfig {
@Autowired
private Environment env;
@Bean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(env.getProperty("datasource.driver"));
dataSource.setUrl(env.getProperty("datasource.url"));
dataSource.setUsername(env.getProperty("datasource.username"));
dataSource.setPassword(env.getProperty("datasource.password"));
return dataSource;
}
@Bean
public LocalSessionFactoryBean sessionFactory(){
LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
sessionFactoryBean.setDataSource(dataSource());
sessionFactoryBean.setPackagesToScan(env.getProperty("entitymanager.packagesToScan"));
Properties hibernateProperties = new Properties();
hibernateProperties.put("hibernate.dialect", env.getProperty("jpa.hibernate.dialect"));
hibernateProperties.put("hibernate.show_sql", env.getProperty("jpa.hibernate.show-sql"));
hibernateProperties.put("hibernate.hbm2ddl.auto", env.getProperty("jpa.hibernate.hbm2ddl.auto"));
hibernateProperties.put("spring.jpa.hibernate.ddl-auto", env.getProperty("jpa.hibernate.ddl-auto"));
sessionFactoryBean.setHibernateProperties(hibernateProperties);
return sessionFactoryBean;
}
@Bean
@Autowired
public HibernateTransactionManager transactionManager(SessionFactory sessionFactory){
HibernateTransactionManager transactionManager = new HibernateTransactionManager();
transactionManager.setSessionFactory(sessionFactory);
return transactionManager;
}
@Bean
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
return new PersistenceExceptionTranslationPostProcessor();
}
}
此配置使用以下环境（@Profile）来设置sessionFactoryBean，名为appliation.yaml：
spring.profiles: param_db
datasource:
driver: org.h2.Driver
url: jdbc:h2:tcp://localhost/~/test
username: sa
password:
jpa:
hibernate.show-sql: true
hibernate.hbm2ddl.auto: none
hibernate.dialect: org.hibernate.dialect.H2Dialect
hibernate.ddl-auto: validate
hibernate.globally_quoted_identifiers: true
entitymanager:
packagesToScan: org.schlago.mldb.mapping
参数应通过DAO使用@Transactional Annotation插入数据库。这个DAO叫做ParametersDao：
package org.schlago.mldb.mapping;
import ...
@Transactional
public class ParametersDao {
@Autowired
private SessionFactory _sessionFactory;
private Session getSession() {
return _sessionFactory.getCurrentSession();
}
public void save(Parameters parameters) { getSession().save(parameters); }
public void update(Parameters parameters) {
getSession().update(parameters);
}
public List<Parameters> getAllParameters() {
return getSession().createQuery("from Parameters").list();
}
public Parameters getParameterById(int id) {
List<Parameters> parametersList = getSession()
.createQuery("from Parameters where paramId = :theId")
.setParameter("theId", id).list();
if (parametersList.size() == 0) {
return null;
}
return parametersList.get(0);
}
}
参数通过Paramters类指定：
package org.schlago.mldb.mapping;
@Entity
@Table(name = "mlparam")
public class Parameters {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long paramId;
@Column(name = "name")
private String name;
@Column(name = "value")
private double value;
@Column(name = "timestamp")
private Date timestamp;
public Parameters(){
}
public long getParamId() {
return paramId;
}
public void setParamId(int paramId) {
this.paramId = paramId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getValue() {
return value;
}
public void setValue(double value) {
this.value = value;
}
public Date getTimestamp() {
return timestamp;
}
public void setTimestamp(Date timestamp) { this.timestamp = timestamp; }
}
我认为ParametersDao的设置方式存在错误。但是，为了您更好地理解，这里是这个项目中使用的其他类。以下类是AgentLogic，它将根据请求在稍后的代码中计算价格。由于代码仍处于早期阶段，我使用@PostConstruct而不是请求，以测试价格计算是否有效：
package org.schlago.mldb.logic;
import...
@Component
public class AgentLogic {
private static final Logger LOGGER = LoggerFactory.getLogger(Application.class);
@Autowired
private MachineLearningSource machineLearningSource;
@PostConstruct
public void init(){
int priceInCent = 50;
priceInCent = machineLearningSource.getPrice(getAgent());
LOGGER.info("Answered with offer about " + priceInCent + " Cents.");
}
// DUMMY class: Return a new agent
public static Agent getAgent(){
// Currently, an Agent is just an (empty) dummy class
Agent agent = new Agent();
return agent;
}
}
最后，下面的课程负责价格计算。由于代码仍处于早期阶段，因此价格计算是随机设置的，而不是实现机器学习算法。在方法getParameters（）中，为了测试目的，将一些参数插入到数据库中：
package org.schlago.mldb.machineLearning;
import org.schlago.mldb.Nodes.Agent;
import org.schlago.mldb.mapping.Parameters;
import org.schlago.mldb.mapping.ParametersDao;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import java.util.Date;
import java.util.HashMap;
import java.util.Random;
@Component
public class MachineLearningSource {
@Autowired
ParametersDao parametersDao;
private static final Logger LOGGER = LoggerFactory.getLogger(MachineLearningSource.class);
public int getPrice(Agent agent) {
Random r = new Random();
int thePrice = r.nextInt(99) + 1;
LOGGER.info("The price is dynamically calculated right now!");
HashMap<String, Double> parameters = getParameters();
return thePrice;
}
public HashMap<String, Double> getParameters() {
HashMap<String, Double> equationParameters = new HashMap<>();
// TEST: Since database is currently empty, parameters are inserted manually here (this will change later)
LOGGER.info("About to insert into table");
Parameters myCalcParams = new Parameters();
myCalcParams.setName("kappa");
myCalcParams.setValue(2.39583992);
myCalcParams.setTimestamp(new Date());
parametersDao.save(myCalcParams);
LOGGER.info("Successfully inserted parameters");
/*
// Get the parameters via parametersDao, work in progress!
List<Parameters> parameters = parametersDao.getAllParameters();
Parameters myParam = parametersDao.getParameterById(3748);
if (myParam == null) {
LOGGER.info("Dataset does not exist!");
}
for (Parameters param : parameters) {
equationParameters.put(param.getName(), param.getValue());
LOGGER.info("Actual parameter for price calculation: " + param.getName());
LOGGER.info("Value: " + param.getValue());
}
*/
// TEST: Return dummy equationParameters
equationParameters.put("a", 2.48238948239);
equationParameters.put("b", 8.23482489729);
return equationParameters;
}
}
更新的错误声明
不幸的是，我仍然收到错误：
2017-02-03 14:41:39.005 INFO 7416 --- [ main] org.schlago.mldb.Application : Starting Application on mobile-97 with PID 7416 (C:\Users\Jan\Documents\Masterarbeit\12_MLDBtest\target\classes started by Jan in C:\Users\Jan\Documents\Masterarbeit\12_MLDBtest)
2017-02-03 14:41:39.005 INFO 7416 --- [ main] org.schlago.mldb.Application : The following profiles are active: param_db
2017-02-03 14:41:39.083 INFO 7416 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@79ca92b9: startup date [Fri Feb 03 14:41:39 CET 2017]; root of context hierarchy
2017-02-03 14:41:40.581 INFO 7416 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'databaseConfig' of type [class org.schlago.mldb.database.DatabaseConfig$$EnhancerBySpringCGLIB$$829d3967] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2017-02-03 14:41:40.721 INFO 7416 --- [ main] o.s.j.d.DriverManagerDataSource : Loaded JDBC driver: org.h2.Driver
2017-02-03 14:41:41.004 INFO 7416 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2017-02-03 14:41:41.020 INFO 7416 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2017-02-03 14:41:41.129 INFO 7416 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {4.3.11.Final}
2017-02-03 14:41:41.129 INFO 7416 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2017-02-03 14:41:41.129 INFO 7416 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2017-02-03 14:41:41.394 INFO 7416 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
2017-02-03 14:41:41.521 INFO 7416 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect
2017-02-03 14:41:41.693 INFO 7416 --- [ main] o.h.h.i.ast.ASTQueryTranslatorFactory : HHH000397: Using ASTQueryTranslatorFactory
2017-02-03 14:41:42.363 INFO 7416 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
2017-02-03 14:41:42.432 INFO 7416 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
2017-02-03 14:41:42.510 WARN 7416 --- [ main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'agentLogic': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.schlago.mldb.machineLearning.MachineLearningSource org.schlago.mldb.logic.AgentLogic.machineLearningSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'machineLearningSource': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.schlago.mldb.mapping.ParametersDao org.schlago.mldb.machineLearning.MachineLearningSource.parametersDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.schlago.mldb.mapping.ParametersDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2017-02-03 14:41:42.510 INFO 7416 --- [ main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2017-02-03 14:41:42.510 INFO 7416 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000227: Running hbm2ddl schema export
2017-02-03 14:41:42.559 INFO 7416 --- [ main] org.hibernate.tool.hbm2ddl.SchemaExport : HHH000230: Schema export complete
2017-02-03 14:41:42.559 ERROR 7416 --- [ main] o.s.boot.SpringApplication : Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'agentLogic': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.schlago.mldb.machineLearning.MachineLearningSource org.schlago.mldb.logic.AgentLogic.machineLearningSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'machineLearningSource': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.schlago.mldb.mapping.ParametersDao org.schlago.mldb.machineLearning.MachineLearningSource.parametersDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.schlago.mldb.mapping.ParametersDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.schlago.mldb.machineLearning.MachineLearningSource org.schlago.mldb.logic.AgentLogic.machineLearningSource; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'machineLearningSource': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.schlago.mldb.mapping.ParametersDao org.schlago.mldb.machineLearning.MachineLearningSource.parametersDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.schlago.mldb.mapping.ParametersDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'machineLearningSource': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.schlago.mldb.mapping.ParametersDao org.schlago.mldb.machineLearning.MachineLearningSource.parametersDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.schlago.mldb.mapping.ParametersDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: org.schlago.mldb.mapping.ParametersDao org.schlago.mldb.machineLearning.MachineLearningSource.parametersDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.schlago.mldb.mapping.ParametersDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations:
2017-02-03 14:41:42.575 INFO 7416 --- [ main] .b.l.ClasspathLoggingApplicationListener : Application failed to start with classpath: [file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/charsets.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/deploy.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/access-bridge-64.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/cldrdata.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/dnsns.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/jaccess.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/jfxrt.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/localedata.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/nashorn.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/sunec.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/sunjce_provider.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/sunmscapi.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/sunpkcs11.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/ext/zipfs.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/javaws.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/jce.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/jfr.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/jfxswt.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/jsse.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/management-agent.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/plugin.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/resources.jar, file:/C:/Program%20Files/Java/jdk1.8.0_60/jre/lib/rt.jar, file:/C:/Users/Jan/Documents/Masterarbeit/12_MLDBtest/target/classes/, file:/C:/Users/Jan/.m2/repository/org/springframework/boot/spring-boot-starter-data-jpa/1.3.5.RELEASE/spring-boot-starter-data-jpa-1.3.5.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/boot/spring-boot-starter/1.3.5.RELEASE/spring-boot-starter-1.3.5.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/boot/spring-boot/1.3.5.RELEASE/spring-boot-1.3.5.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/1.3.5.RELEASE/spring-boot-autoconfigure-1.3.5.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/boot/spring-boot-starter-logging/1.3.5.RELEASE/spring-boot-starter-logging-1.3.5.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/ch/qos/logback/logback-classic/1.1.7/logback-classic-1.1.7.jar, file:/C:/Users/Jan/.m2/repository/ch/qos/logback/logback-core/1.1.7/logback-core-1.1.7.jar, file:/C:/Users/Jan/.m2/repository/org/slf4j/jul-to-slf4j/1.7.21/jul-to-slf4j-1.7.21.jar, file:/C:/Users/Jan/.m2/repository/org/slf4j/log4j-over-slf4j/1.7.21/log4j-over-slf4j-1.7.21.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-core/4.2.6.RELEASE/spring-core-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/yaml/snakeyaml/1.16/snakeyaml-1.16.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/boot/spring-boot-starter-aop/1.3.5.RELEASE/spring-boot-starter-aop-1.3.5.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-aop/4.2.6.RELEASE/spring-aop-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/aopalliance/aopalliance/1.0/aopalliance-1.0.jar, file:/C:/Users/Jan/.m2/repository/org/aspectj/aspectjweaver/1.8.9/aspectjweaver-1.8.9.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/boot/spring-boot-starter-jdbc/1.3.5.RELEASE/spring-boot-starter-jdbc-1.3.5.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/apache/tomcat/tomcat-jdbc/8.0.33/tomcat-jdbc-8.0.33.jar, file:/C:/Users/Jan/.m2/repository/org/apache/tomcat/tomcat-juli/8.0.33/tomcat-juli-8.0.33.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-jdbc/4.2.6.RELEASE/spring-jdbc-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/hibernate/hibernate-entitymanager/4.3.11.Final/hibernate-entitymanager-4.3.11.Final.jar, file:/C:/Users/Jan/.m2/repository/org/jboss/logging/jboss-logging/3.3.0.Final/jboss-logging-3.3.0.Final.jar, file:/C:/Users/Jan/.m2/repository/org/jboss/logging/jboss-logging-annotations/1.2.0.Beta1/jboss-logging-annotations-1.2.0.Beta1.jar, file:/C:/Users/Jan/.m2/repository/org/hibernate/hibernate-core/4.3.11.Final/hibernate-core-4.3.11.Final.jar, file:/C:/Users/Jan/.m2/repository/antlr/antlr/2.7.7/antlr-2.7.7.jar, file:/C:/Users/Jan/.m2/repository/org/jboss/jandex/1.1.0.Final/jandex-1.1.0.Final.jar, file:/C:/Users/Jan/.m2/repository/dom4j/dom4j/1.6.1/dom4j-1.6.1.jar, file:/C:/Users/Jan/.m2/repository/xml-apis/xml-apis/1.0.b2/xml-apis-1.0.b2.jar, file:/C:/Users/Jan/.m2/repository/org/hibernate/common/hibernate-commons-annotations/4.0.5.Final/hibernate-commons-annotations-4.0.5.Final.jar, file:/C:/Users/Jan/.m2/repository/org/hibernate/javax/persistence/hibernate-jpa-2.1-api/1.0.0.Final/hibernate-jpa-2.1-api-1.0.0.Final.jar, file:/C:/Users/Jan/.m2/repository/org/javassist/javassist/3.18.1-GA/javassist-3.18.1-GA.jar, file:/C:/Users/Jan/.m2/repository/javax/transaction/javax.transaction-api/1.2/javax.transaction-api-1.2.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/data/spring-data-jpa/1.9.4.RELEASE/spring-data-jpa-1.9.4.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/data/spring-data-commons/1.11.4.RELEASE/spring-data-commons-1.11.4.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-orm/4.2.6.RELEASE/spring-orm-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-context/4.2.6.RELEASE/spring-context-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-expression/4.2.6.RELEASE/spring-expression-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-tx/4.2.6.RELEASE/spring-tx-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-beans/4.2.6.RELEASE/spring-beans-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/org/slf4j/jcl-over-slf4j/1.7.21/jcl-over-slf4j-1.7.21.jar, file:/C:/Users/Jan/.m2/repository/org/springframework/spring-aspects/4.2.6.RELEASE/spring-aspects-4.2.6.RELEASE.jar, file:/C:/Users/Jan/.m2/repository/com/sparkjava/spark-core/1.1.1/spark-core-1.1.1.jar, file:/C:/Users/Jan/.m2/repository/org/slf4j/slf4j-api/1.7.21/slf4j-api-1.7.21.jar, file:/C:/Users/Jan/.m2/repository/org/eclipse/jetty/jetty-server/9.2.16.v20160414/jetty-server-9.2.16.v20160414.jar, file:/C:/Users/Jan/.m2/repository/javax/servlet/javax.servlet-api/3.1.0/javax.servlet-api-3.1.0.jar, file:/C:/Users/Jan/.m2/repository/org/eclipse/jetty/jetty-http/9.2.16.v20160414/jetty-http-9.2.16.v20160414.jar, file:/C:/Users/Jan/.m2/repository/org/eclipse/jetty/jetty-util/9.2.16.v20160414/jetty-util-9.2.16.v20160414.jar, file:/C:/Users/Jan/.m2/repository/org/eclipse/jetty/jetty-io/9.2.16.v20160414/jetty-io-9.2.16.v20160414.jar, file:/C:/Users/Jan/.m2/repository/org/eclipse/jetty/jetty-webapp/9.2.16.v20160414/jetty-webapp-9.2.16.v20160414.jar, file:/C:/Users/Jan/.m2/repository/org/eclipse/jetty/jetty-xml/9.2.16.v20160414/jetty-xml-9.2.16.v20160414.jar, file:/C:/Users/Jan/.m2/repository/org/eclipse/jetty/jetty-servlet/9.2.16.v20160414/jetty-servlet-9.2.16.v20160414.jar, file:/C:/Users/Jan/.m2/repository/org/eclipse/jetty/jetty-security/9.2.16.v20160414/jetty-security-9.2.16.v20160414.jar, file:/C:/Users/Jan/.m2/repository/net/sf/xenqtt/xenqtt/0.9.7/xenqtt-0.9.7.jar, file:/C:/Users/Jan/.m2/repository/org/json/json/20151123/json-20151123.jar, file:/C:/Users/Jan/.m2/repository/com/pi4j/pi4j-core/1.0/pi4j-core-1.0.jar, file:/C:/Users/Jan/.m2/repository/org/bouncycastle/bcprov-jdk15on/1.54/bcprov-jdk15on-1.54.jar, file:/C:/Users/Jan/.m2/repository/org/bouncycastle/bcpkix-jdk15on/1.54/bcpkix-jdk15on-1.54.jar, file:/C:/Users/Jan/.m2/repository/com/h2database/h2/1.4.192/h2-1.4.192.jar, file:/C:/Users/Jan/.m2/repository/org/opcfoundation/ua/1.02.337.10/ua-1.02.337.10.jar, file:/C:/Users/Jan/.m2/repository/com/prosys/ua/server-client-sdk/2.2/server-client-sdk-2.2.jar, file:/C:/Program%20Files%20(x86)/JetBrains/IntelliJ%20IDEA%202016.2.5/lib/idea_rt.jar]
答案 0 :(得分：0)
尝试将@Component注释添加到MachineLearningSource服务类，并检查dao和服务是否包含在@ComponentScan
更新
在AgentLogic中，您手动创建machineLearningSource
MachineLearningSource machineLearningSource = new MachineLearningSource();
priceInCent = machineLearningSource.getPrice(getAgent());
改为添加
@Autowired
private MachineLearningSource machineLearningSource;
让类让Spring正确初始化。或者您可以在课堂上自动装配dao并手动调用
machineLearningSource.setDao(theAutowiredDao);
UPDATE2：
现在dao没有被标记为被检测为弹簧豆。将@Repository注释添加到DAO。
UPDATE3：
sessionFactoryBean.setPackagesToScan(env.getProperty("entitymanager.packagesToScan"));
检查在那里扫描哪些包。需要包含存储实体类的所有包。