Spring 4和Hibernate 4 Session錯誤

Question

在My Spring MVC和hibernate Web項目上，什么是Java基礎配置，它是從Entity類happly生成表，但是當我嘗試從post表中生成數據列表時，卻出現了關於getCurrent Session的錯誤……

我的實體類：

@Entity
@Table(name="post")
public class Post{

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;

@Column(nullable = false)
String title;

@Column(nullable = false)
@Type(type="text")
String body;

@Column(nullable = true)
String feature_image;

@Column(nullable = true)
int active_status = 1;

 }

道：

@Repository
public class TestDao {

@Autowired
private SessionFactory sessionFactoryBean;

private Session getCurrentSession() {
    return sessionFactoryBean.getCurrentSession();
}


@SuppressWarnings("unchecked")
public List<Post> listProduct() {
    return (List<Post>) 
   getCurrentSession().createCriteria(Post.class).list();
  }
}

服務：

@Service
@Transactional
public class TestService{

@Autowired
private TestDao testDao;

public List<Post> postList(){
return testDao.listProduct();
 }
}

控制器：

@Controller
public class HomeController {

@Autowired
TestService testService;

@RequestMapping(value = "/", method = RequestMethod.GET)
public String index(ModelMap map) {

    List<Post> results = testService.postList();
    Post lastPost=null;
    if(!results.isEmpty()){
        Collections.reverse(results);
        lastPost = results.get(0);
        results.remove(0);
    }
    map.addAttribute("lastPost",lastPost);
    map.addAttribute("postList",results);
    return "home";
  }
}

配置類：

@Configuration
@PropertySource("classpath:db.properties")
public class AppDataSourceConfig {

@Bean
public DataSource dataSource() {
    DriverManagerDataSource dataSource = new DriverManagerDataSource();     
    dataSource.setDriverClassName("com.mysql.jdbc.Driver");
    dataSource.setUrl("jdbc:mysql://localhost:3306/testdb?useSSL=false");
    dataSource.setUsername("root");
    dataSource.setPassword("root");

    return dataSource;
}

@Bean
public LocalSessionFactoryBean sessionFactory() {
    LocalSessionFactoryBean sessionFactoryBean = new 
    LocalSessionFactoryBean();
    sessionFactoryBean.setDataSource(dataSource());
    sessionFactoryBean.setPackagesToScan("com.imran.model");
    sessionFactoryBean.setHibernateProperties(hibProperties());
    return sessionFactoryBean;
}

private Properties hibProperties() {
    Properties properties = new Properties();
    properties.put("hibernate.dialect", 
    "org.hibernate.dialect.MySQLDialect");
    properties.put("hibernate.show_sql", "true");
    properties.put("hibernate.hbm2ddl.auto","update");
    return properties;  
  }

@Bean
public HibernateTransactionManager transactionManager() {
    HibernateTransactionManager transactionManager = new 
    HibernateTransactionManager();
    transactionManager.setSessionFactory(sessionFactory().getObject());
    return transactionManager;
  }
}

最后是錯誤：

   Mar 04, 2018 10:28:52 PM org.apache.catalina.core.StandardWrapperValve 
  invoke
  SEVERE: Servlet.service() for servlet [dispatcher] in context with path 
    [/BlogSolutionUsingSpringHibernateWithClassLevelConfig] threw exception 
     [Request processing failed; nested exception is 
      org.hibernate.HibernateException: Could not obtain transaction-
     synchronized 
      Session for current thread] with root cause
      org.hibernate.HibernateException: Could not obtain transaction-
       synchronized Session for current thread at 

org.springframework.orm.hibernate4.SpringSessionContext.currentSession（SpringSes sionContext.java:134）在org.hibernate.internal.SessionFactoryImpl.getCurrentSession（SessionFactoryImpl.java:1014）在com.imran.dao.TestDao.getCurrentSession（TestDao.java ：21）位於com.imran.dao.TestDao.listProduct（TestDao.java:27）位於com.imran.service.TestService.postList（TestService.java:23）位於com.imran.controller.HomeController.index（HomeController。 java：29）位於sun.reflect.NativeMethodAccessorImpl.invoke0（本地方法）位於sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）位於sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） org.springframework.web.method.support.InvocableHandlerMethod.doInvoke（Method.java:497）在org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod .java：136），位於org.springframework.web.servlet.mvc.method.annot org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod（RequestMappingHandlerAdapter.java:871）上的ation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:102）在org.springframework.web.servlet.mvc.method上。 org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.org）上的注解.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:777）在org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:87） org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:925）的org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:978）的org.springframework.web.servlet的java：991） org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet）上的javax.servlet.http.HttpServlet.service（HttpServlet.java:622）上的.FrameworkServlet.doGet（FrameworkServlet.java:870）。 org.apache.catalina.core.ApplicationFilterChain的javax.servlet.http.HttpServlet.service（HttpServlet.java:729）的java：855）org.apache.catalina.core.ApplicationFilterChain的org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:291） org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52）處的org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:239）處的.doFilter（ApplicationFilterChain.java:206） org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:217）的org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:206）在org.apache.catalina.core.StandardContextValve.invoke（ org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:502）處的org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:142）處的StandardContextValve.java:106） org.apache.catalina.valves.AbstractA上的.valves.ErrorReportValve.invoke（ErrorReportValve.java:79） org處的org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:88）處的ccessLogValve.invoke（AbstractAccessLogValve.java:616）org處的org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:518） .apache.coyote.http11.AbstractHttp11Processor.process（AbstractHttp11Processor.java:1091）在org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process（AbstractProtocol.java:673）在org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor org.apache.tomcat.util.net上的.doRun（NioEndpoint.java:1500），java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1142）上的org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.run（NioEndpoint.java:1456） org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）處的java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:617）在java.lang.Thread.run（線程（java：745）

Answer 1

在您的課程上添加@EnableTransactionManagement應該可以解決您的問題