Java 使用struts2从hibernate获取数据时出现问题
我正在尝试从表中获取数据，但除了日志文件中的一些错误外，我什么都没有得到…请有人帮助我 catalina.2013-11-15.log 2013年11月15日11:13:32.521信息[http-apr-8080-exec-2]Java 使用struts2从hibernate获取数据时出现问题,java,sql,hibernate,struts2,Java,Sql,Hibernate,Struts2,我正在尝试从表中获取数据，但除了日志文件中的一些错误外，我什么都没有得到…请有人帮助我 catalina.2013-11-15.log 2013年11月15日11:13:32.521信息[http-apr-8080-exec-2]HCANN000001:Hibernate Commons注释{4.0.2.Final} 2013年11月15日11:13:32.557信息[http-apr-8080-exec-2]null.null HH000412:Hibernate核心{4.2.7.Final}
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/ecommerce</property>
<property name="hibernate.connection.username">root</property>
<property name="connection.password"></property>
<property name="connection.pool_size">10</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySqlDialect</property>
<property name="show_sql">true</property>
<mapping resource="com/ecommerce/model/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/ecommerce</property>
<property name="hibernate.connection.username">root</property>
<property name="connection.password"></property>
<property name="connection.pool_size">10</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySqlDialect</property>
<property name="show_sql">true</property>
<mapping resource="com/ecommerce/model/User.hbm.xml"/>
</session-factory>
</hibernate-configuration>
public String execute() {
UserServiceDao userServiceDao = new UserServiceImpl();
User user = new User();
users = new ArrayList<User>();
try {
users = userServiceDao.fetchService();
} catch (Exception e) {
e.printStackTrace();
}
return "SUCCESS";
}
public List getUsers() {
return this.users;
}
public void setUsers(List users) {
this.users = users;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public int getContactNumber() {
return contactNumber;
}
public void setContactNumber(int contactNumber) {
this.contactNumber = contactNumber;
}
public static SessionFactory getSessionFactory() throws HibernateException {
try{
Configuration configuration = new Configuration();
configuration.configure();
serviceRegistry = new serviceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
} catch(HibernateException e) {
throw new HibernateException( " \nSession factory"+e );
}
}
public List getAllUser() throws ClassNotFoundException,Exception{
Session session = DataBaseConnection.getSessionFactory().openSession();
Transaction transaction = null;
List users = null;
try {
transaction = session.beginTransaction();
users = session.createQuery("from user").list();
transaction.commit();
} catch (HibernateException e) {
transaction.rollback();
throw new Exception("Exception in UserImpl " + e);
} finally {
session.close();
}
return users;
}
<hibernate-mapping>
<class name="com.ecommerce.hibernate.model.User" table="user">
<meta attribute="class-description">
This class contains the user details.
</meta>
<id name="id" type="int" column="id">
<generator class="increment"/>
</id>
<property name="name">
<column name="name" />
</property>
<property name="userName">
<column name="username"/>
</property>
<property name="password">
<column name="password"/>
</property>
<property name="phone">
<column name="phone"/>
</property>
</class>
</hibernate-mapping>
<s:iterator value="users">
<tr>
<td><s:property value="id"/></td>
<td><s:property value="name"/></td>
<td><s:property value="userName"/></td>
<td><s:property value="password"/></td>
<td><s:property value="contactNumber"/></td>
<td><s:property value="address"/></td>
<td><s:property value="city"/></td>
<td><s:property value="email"/></td>
</tr>
</s:iterator>
private static SessionFactory getSessionFactory() {
try {
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
return sessionFactory;
} catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
我对你的密码没有什么疑问 1 users=session.createQueryfrom**user**.list； 您可以将用户更改为用户并重试吗 2 UserServiceDao UserServiceDao=新的userserviceinpl 我认为这不是正确的做法。。这是命名约定的问题吗 试一试
您的hibernate.cfg.xml是否在类路径中？是的，它在类路径中，恰好在/src或WEB-INF/classes文件夹中？在C:\apache-tomcat-8.0.0-RC5\webapps\HibernateExample1\WEB-INF\classes\hibernate.cfg.xml中默认池大小为20，没有限制，因此，在您的情况下，这似乎没有用。关于您的疑问：1我改为用户是我自己犯的错误。2这也是我自己犯的错误命名约定…非常感谢。。但同样的问题仍然存在，这可能是个愚蠢的问题，但问题来了。。如何确保您没有从查询中获取任何数据？我还注意到您没有提到User.hbm.xml中属性的数据类型。如果我没有错的话，我觉得这是强制属性。
private static SessionFactory getSessionFactory() {
try {
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
return sessionFactory;
} catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
private static SessionFactory getSessionFactory() {
try {
SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
return sessionFactory;
} catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}