我正在開發一個在eclipse中使用GWT,Hibernate,RPC的簡單應用程序。我正試圖在客戶端頁面上顯示來自數據庫的結果。在實現服務接口時,我將對象列表形式的結果轉換爲對象數組,但出現錯誤。這裏是我的代碼&錯誤:GWT RPC Hibernate:在將對象列表轉換爲對象數組時出錯
服務接口:
import java.util.ArrayList;
import hibDomain.User;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
@RemoteServiceRelativePath("testService")
public interface RpctestService extends RemoteService {
public String addUser(String firstName,String lastName) throws IllegalArgumentException;
public ArrayList<User> getUser();
}
----------------
package rpctest.client;
import java.util.ArrayList;
import hibDomain.User;
import com.google.gwt.user.client.rpc.AsyncCallback;
public interface RpctestServiceAsync {
void addUser(String firstName, String lastName,
AsyncCallback<String> callback);
void getUser(AsyncCallback<ArrayList<User>> asyncCallback);
}
實現:
package rpctest.server;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
//import com.hib.HibernateUtil;
import org.hibernate.Session;
import org.hibernate.Transaction;
import hibDomain.User;
import rpctest.client.RpctestService;
public class RpctestServiceImpl extends RemoteServiceServlet implements RpctestService {
public String addUser(String name1, String name2)
throws IllegalArgumentException {
Transaction trns = null;
Session session = HibernateUtil.getSessionFactory().openSession();
try {
trns = session.beginTransaction();
User user = new User();
user.setFirstName(name1);
user.setLastName(name2);
session.save(user);
session.getTransaction().commit();
} catch (RuntimeException e) {
if(trns != null){
trns.rollback();
}
e.printStackTrace();
} finally{
session.flush();
session.close();
}
return name1+name2; // to test flextable entris only
}
//@Override
public ArrayList<User> getUser()
{
List<User> getUser = null;
Transaction trns = null;
Session session = HibernateUtil.getSessionFactory().openSession();
try {
trns = session.beginTransaction();
getUser = session.createQuery("from User").list();
//* for (Iterator<User> iter = getUser.iterator(); iter.hasNext();)
//{
//User user = iter.next();
//
//*}
trns.commit();
} catch (RuntimeException e) {
if(trns != null){
trns.rollback();
}
e.printStackTrace();
} finally{
session.flush();
session.close();
}
return getUser.toArray(new User[getUser.size()]);
}
}
Eclipse的高燈返回getUser.toArray(新用戶[getUser.size( )]); &表明Change method return type to User[]
錯誤是隻有一個聲明,其中Eclipse建議的建議。你應該檢查Eclipse給出的建議。 –
這篇文章與'Hibernate','GWT'或者'RPC'無關...... –