我收到的消息无法打开连接,也没有生成任何特定的日志
我的hibernate.cfg.xml是: -
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate_oar</property>
<property name="hibernate.connection.user"> root</property>
<property name="hibernate.connection.password">dinga</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.show_sql">true</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.hbm2ddl.auto">create</property>
<property name="use_sql_comments">true</property>
<property name="hibernate.validator.apply_to_ddl">false</property>
<property name="hibernate.validator.autoregister_listeners">false</property>
<property name="minPoolSize"> 5</property>
<property name="maxPoolSize">100</property>
<property name="initialPoolSize">5</property>
<property name="validateConnectionOnBorrow">true</property>
<property name="maxStatements">10</property>
<mapping class="com.model.Student" />
</session-factory>
我正在生成会话
public class DataAccessObject {
private static Session session = null;
public static Session getSession() {
AnnotationConfiguration cfg = new AnnotationConfiguration().configure();
//cfg.addAnnotatedClass(hello.Message.class);
SessionFactory annotedSessionFactory = cfg.buildSessionFactory();
Session session = annotedSessionFactory.openSession();
return session;
}
}
我正在使用session从mysql数据库中检索数据
public class CrudDao {
private Session session;
public CrudDao() {
session = DataAccessObject.getSession();
}
public List<Student> getAllStudents() {
Transaction tx = null;
Query query = null;
List<Student> students = new ArrayList();
String myquery = "select s.studentId,s.name,s.department,s.emailId,s.status from Student s";
try {
query = session.createQuery(myquery);
List<Student> list = query.list();
System.out.println(list);
Iterator<Student> itr = list.iterator();
Student newstudent = new Student();
while (itr.hasNext()) {
Student mystudent = itr.next();
newstudent.setStudentId(mystudent.getStudentId());
newstudent.setName(mystudent.getName());
newstudent.setDepartment(mystudent.getDepartment());
newstudent.setEmailId(mystudent.getEmailId());
newstudent.setStatus(mystudent.getStatus());
students.add(newstudent);
System.out.println(students);
}
} catch (HibernateException e) {
System.err.println(e.getMessage());
} finally {
session.close();
}
return students;
}
}