好的，当我开始一个新的Java项目并集成诸如spring / hibernate之类的工具时，我是一个完全的初学者。实际上，这是我第一次这样做。因此，我敢肯定错误对于你们来说将是显而易见的。
猜测：
错误
[2016-07-28 01:29:14.869] boot - 22234 ERROR [http-nio-8080-exec-1] --- [dispatcherServlet]: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.ClassCastException: org.springframework.orm.jpa.EntityManagerHolder cannot be cast to org.springframework.orm.hibernate5.SessionHolder] with root cause java.lang.ClassCastException: org.springframework.orm.jpa.EntityManagerHolder cannot be cast to org.springframework.orm.hibernate5.SessionHolder at org.springframework.orm.hibernate5.HibernateTransactionManager.doGetTransaction(HibernateTransactionManager.java:376)
pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.pse</groupId> <artifactId>plataforma-ejercicios</artifactId> <version>1.0-SNAPSHOT</version> <properties> <java.version>1.8</java.version> <org.springframework.version>4.3.1.RELEASE</org.springframework.version> <spring-boot-starter.version>1.3.5.RELEASE</spring-boot-starter.version> <org.hibernate.version>5.2.0.Final</org.hibernate.version> <mysql-connector-java.version>5.1.38</mysql-connector-java.version> <c3p0.version>0.9.1.2</c3p0.version> </properties> <dependencies> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>${c3p0.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${org.springframework.version}</version> </dependency> <!-- Hibernate --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>5.2.1.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.1.3.Final</version> </dependency> <dependency> <groupId>org.hibernate.common</groupId> <artifactId>hibernate-commons-annotations</artifactId> <version>5.0.1.Final</version> </dependency> <dependency> <groupId>org.hibernate.javax.persistence</groupId> <artifactId>hibernate-jpa-2.0-api</artifactId> <version>1.0.1.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>5.1.0.Final</version> </dependency> <!-- Maria --> <dependency> <groupId>org.mariadb.jdbc</groupId> <artifactId>mariadb-java-client</artifactId> <version>1.1.7</version> </dependency> <!-- Spring framework --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${org.springframework.version}</version> <exclusions> <exclusion> <artifactId>commons-logging</artifactId> <groupId>commons-logging</groupId> </exclusion> </exclusions> </dependency> <!-- Spring boot --> .... ... </dependencies> </project>
base-context.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> <import resource="classpath:hibernate-context.xml" /> <context:property-placeholder location="classpath:hibernate.properties" /> <bean id="studentDAO" class="org.pse.plataformaejercicios.dao.StudentDAO"> <property name="sessionFactory" ref="sessionFactory" /> </bean> </beans>
hibernate-context.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <bean id="c3p0DataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${hibernate.connection.driver_class}" /> <property name="jdbcUrl" value="${hibernate.connection.url}" /> <property name="user" value="${hibernate.connection.username}" /> <property name="password" value="${hibernate.connection.password}" /> <property name="minPoolSize" value="${hibernate.connection.min_pool_size}" /> <property name="maxPoolSize" value="${hibernate.connection.max_pool_size}" /> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"> <property name="dataSource" ref="c3p0DataSource" /> <property name="hibernateProperties"> <props> <prop key="hibernate.show_sql">true</prop> </props> </property> <property name="packagesToScan" value="org.pse.plataformaejercicios.model" /> </bean> <tx:annotation-driven transaction-manager="transactionManager" /> <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory" /> </bean> </beans>
hibernate.properties
hibernate.dialect org.hibernate.dialect.MySQL5Dialect hibernate.connection.driver_class org.mariadb.jdbc.Driver hibernate.connection.url jdbc:mariadb://127.0.0.1:3306/pse hibernate.connection.username pse hibernate.connection.password passpse hibernate.connection.min_pool_size 2 hibernate.connection.max_pool_size 10 hibernate.connection.autocommit true hibernate.hbm2ddl.auto update hibernate.show_sql true
StudentController.java
@RestController public class StudentController { private Logger logger = LoggerFactory.getLogger(StudentController.class); private StudentService studentService; @RequestMapping(value = "/student/{studentId}/classes", method = RequestMethod.GET) public ClassDTO getClassesForStudent(){ return new ClassDTO(); } @RequestMapping("/saveStudent/{nombre}/{apellido}") public void saveStudent(@PathVariable String nombre, @PathVariable String apellido) { logger.info("Entrada al controller de: TestHibernate"); Student student = new Student(); student.setLastName(apellido); student.setName(nombre); studentService.save(student); } @Autowired public void setStudentService(StudentService studentService) { this.studentService = studentService; } }
StudentServiceImpl.java
@Service public class StudentServiceImpl implements StudentService { private StudentDAO studentDAO; @Override @Transactional(readOnly = false) public void save(Student student) { studentDAO.save(student); } @Autowired public void setStudentDAO(StudentDAO studentDAO) { this.studentDAO = studentDAO; } }
StudentDAO.java
public class StudentDAO { private SessionFactory sessionFactory; public void save(Student student){ try { Session session = sessionFactory.getCurrentSession(); session.save(student); } catch (Exception e) { e.printStackTrace(); } } @Autowired public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; } }
您是否使用Spring-Boot？是的，在我的情况下，问题出在@EnableAutoConfiguration-使用exclude = HibernateJpaAutoConfiguration.class
