我编写了一个简单的 Web 应用程序来注册用户。但我收到如下错误。
INFO: Configuration resource: /com/vaannila/config/adminuser.hbm.xml
java.lang.NullPointerException
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1399)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1378)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1298)
at com.vaannila.utility.FactoryUtil.<clinit>(FactoryUtil.java:18)
at com.vaannila.service.AdminUserBO.addUser(AdminUserBO.java:17)
at com.vaannila.delegate.AdminUserBusinessDelegate.addUser(AdminUserBusinessDelegate.java:11)
at com.vaannila.action.AdminUserAction.addUser(AdminUserAction.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:216)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at com.vaannila.service.AdminUserBO.addUser(AdminUserBO.java:17)
at com.vaannila.delegate.AdminUserBusinessDelegate.addUser(AdminUserBusinessDelegate.java:11)
at com.vaannila.action.AdminUserAction.addUser(AdminUserAction.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:216)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
1123damuammudamodardamuchinni@gmail.com
下面还有 FactoryUtil 类和 BO 类的代码
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class FactoryUtil {
//Static Session Factory
private static org.hibernate.SessionFactory sessionFactory;
private FactoryUtil() {}
static {
//Creates the SessionFactory based on the XML Configuration
try{
Configuration configs = new Configuration();
sessionFactory = configs.configure("/com/vaannila/config/adminuser.hbm.xml").buildSessionFactory();
}catch(Exception e){
e.printStackTrace();
}
}
public static SessionFactory getInstance() {
return sessionFactory;
}
public Session openSession() {
return sessionFactory.openSession();
}
public Session getCurrentSession() {
return sessionFactory.getCurrentSession();
}
public static void close() {
if (sessionFactory != null)
sessionFactory.close();
sessionFactory = null;
}
public static FactoryUtil getSessionFactory() {
// TODO Auto-generated method stub
return null;
}
}
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.vaannila.domain.AdminUserVO;
import com.vaannila.utility.FactoryUtil;
public class AdminUserBO {
public void addUser(AdminUserVO auserVO) {
// TODO Auto-generated method stub
Session session = FactoryUtil.getInstance().openSession();
Transaction transaction = null;
Long singerId = null;
try {
transaction = session.beginTransaction();
AdminUserVO userVO = new AdminUserVO();
singerId = (Long)session.save(userVO);
transaction.commit();
}
catch (HibernateException e) {
transaction.rollback();
e.printStackTrace();
}
finally {
session.close();
}
}
}
下面是映射文件。
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.vaannila.domain.AdminUserVO" table="users">
<id name="userId" type="int" column="userId" >
<generator class="increment"/>
</id>
<property name="userName">
<column name="userNm" />
</property>
<property name="password">
<column name="password" />
</property>
<property name="emailAddress">
<column name="emailId" />
</property>
</class>
</hibernate-mapping>
请任何人都可以建议我解决上述问题
编辑
public class AdminUserVO implements java.io.Serializable{
private String userName;
private String userId;
private String password;
private String emailAddress;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getUserId() {
return userId;
}
public void setUserId(String userId) {
this.userId = userId;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmailAddress() {
return emailAddress;
}
public void setEmailAddress(String emailAddress) {
this.emailAddress = emailAddress;
}
}
User Name damodar
User Id damuammu
Password 1123
Email Address damuchinni@gmail.com
以上是我输入的数据，同样也打印在 stacttrace 中。