我是 Java EE 的新手，我正在尝试向现有的 Java EE 应用程序添加一个新的数据库表和程序，该应用程序使用带有持久性和 Spring 框架的休眠。我收到一条错误消息，提示找不到符号我创建了 4 个类：-
public interface ncs_userInterface extends Persistable {
public abstract int getVersion();
public abstract String getPERSONIDNO();
public abstract String getFULLNAME();
public abstract long getID();
public abstract Date getCreationDate();
public abstract int getROLEID();
public abstract int getSCHEMEID();
public abstract String getSCHEMETITLE();
public abstract String getROLENAME();
public abstract void setVersion(int version);
public abstract void setPERSONIDNO(String PERSONIDNO);
public abstract void setFULLNAME(String FULLNAME);
public abstract void setID(long ID);
public abstract void setCreationdate(Date creationdate);
public abstract void setROLEID(int ROLEID);
public abstract void setSCHEMEID(int SCHEMEID);
public abstract void setSCHEMETITLE(String SCHEMETITLE);
public abstract void setROLENAME(String ROLENAME);
}
public class ncs_user extends PersistentObject implements ncs_userInterface{
private long ID;
private int version;
private Date creationdate;
private String PERSONIDNO;
private String FULLNAME;
private int ROLEID;
private String ROLENAME;
private int SCHEMEID;
private String SCHEMETITLE;
public ncs_user() {
}
public ncs_user(String PERSONIDNO, int version){
this.PERSONIDNO=PERSONIDNO;
this.version=version;
}
// All the getters and setters follow this but haven't listed them in this code
}
public abstract class ncs_userManager extends BasicManager{
protected static ncs_userManager INSTANCE;
public static final synchronized ncs_userManager getInstance() {
return INSTANCE;
}
public abstract void createAndPersistncs_user(ncs_userInterface newNcs_user);
public abstract List findNcs_usersByIdentity(String PERSONIDNO);
public abstract void updateNcs_user(ncs_userInterface changedNcs_user);
public abstract void deleteNcs_user(ncs_userInterface deletableNcs_user);
}
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.hibernate.Hibernate;
import org.hibernate.type.Type;
import org.olat.admin.user.delete.service.UserDeletionManager;
import org.olat.core.commons.persistence.DB;
import org.olat.core.commons.persistence.DBFactory;
import org.olat.core.gui.UserRequest;
import org.olat.core.gui.control.WindowControl;
import org.olat.core.id.Identity;
import org.olat.core.logging.OLog;
import org.olat.core.logging.Tracing;
import org.olat.core.util.coordinate.CoordinatorManager;
import org.olat.user.UserDataDeletable;
public class ncs_userManagerImpl extends ncs_userManager implements UserDataDeletable{
private static OLog log = Tracing.createLoggerFor(ncs_userManagerImpl.class);
public ncs_userManagerImpl(final UserDeletionManager userDeletionManager) {
userDeletionManager.registerDeletableUserData(this);
INSTANCE = this;
}
@Override
public void createAndPersistncs_user(final ncs_userInterface newNcs_user) {
final DB db = DBFactory.getInstance();
db.saveObject(newNcs_user);
if (log.isDebug()) {
log.debug("NCS_USER has been created: " + newNcs_user.getPERSONIDNO());
}
}
@Override
public List<ncs_userInterface> findNcs_usersByIdentity(final String PERSONIDNO) {
final String query = "from org.olat.ncs_user.ncs_user as b where b.PERSONIDNO = ?";
return DBFactory.getInstance().find(query, PERSONIDNO, Hibernate.LONG);
}
@Override
public void updateNcs_user(final ncs_userInterface changedNcs_user) {
DBFactory.getInstance().updateObject(changedNcs_user);
}
@Override
public void deleteNcs_user(final ncs_userInterface deletableNcs_user) {
DBFactory.getInstance().deleteObject(deletableNcs_user);
}
@Override
public void deleteUserData(final Identity identity, final String aString) {
}
}
我还为上面的代码创建了一个休眠映射文件和一个弹簧上下文文件。我正在尝试使用以下代码创建一个单例：-
final ncs_userManager n;
n = new ncs_userManager.getInstance();
final ncs_userInterface newncs_user = new ncs_user(login, 0);
List l = n.findNcs_usersByIdentity(PERSONIDNO);
我在行中遇到错误n = new ncs_userManager.getInstance()：-
org/olat/admin/user/imp/ImportStep00.java:[205,75] error: cannot find symbol
我想知道是否有人可以帮助我弄清楚我犯了什么错误。