在My Spring MVC和hibernate Web项目上,什么是Java基础配置,它是从Entity类happly生成表,但是当我尝试从post表中生成数据列表时,却出现了关于getCurrent Session的错误……
我的实体类:
@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();
}
}
服务:
@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";
}
}
配置类:
@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;
}
}
最后是错误:
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)
在com.imran.dao.TestDao.listProduct(TestDao.java:27)
在com.imran.service.TestService.postList(TestService.java:23)
在com.imran.controller.HomeController.index(HomeController.java:29)
在sun.reflect.NativeMethodAccessorImpl.invoke0(本机方法)处
在sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
在sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
在java.lang.reflect.Method.invoke(Method.java:497)
在org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
在org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
在org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
在org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:871)
在org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:777)
在org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
在org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
在org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
在org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978)
在org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:870)
在javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
在org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855)
在javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
在org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
在org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
在org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
在org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
在org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
在org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
在org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
在org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
在org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
在org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
在org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
在org.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.doRun(NioEndpoint.java:1500)
在org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.run(NioEndpoint.java:1456)
在java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
在java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:617)
在org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run(TaskThread.java:61)
在java.lang.Thread.run(Thread.java:745)
最佳答案
在您的课程上添加@EnableTransactionManagement应该可以解决您的问题
关于java - Spring 4和Hibernate 4 Session错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49103346/