大家好，正在通过构建一个简单的 Web 应用程序表单来练习休眠和 servlet。如果我不使用休眠来保存数据而只使用 JSP 和 servlet，该程序可以正常工作。现在，如果我添加我的 Hibernate 代码，它会产生这个错误。
SEVERE: Servlet.service() for servlet [com.ApplicationForm.ApplicationForm] in context with path [/ApplicationForm] threw exception [Servlet execution threw an exception] with root cause
java.lang.ClassNotFoundException: org.hibernate.HibernateException
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
at com.ApplicationForm.AppFormServletHelper.doPost(AppFormServletHelper.java:54)
at com.ApplicationForm.ApplicationForm.doPost(ApplicationForm.java:24)
//More errors messages here
错误消息始终指向包含我的 Hibernate 实例类 AppFormServletHelper 的此类。（下面的完整代码）
public class AppFormServletHelper extends ApplicationFormServletBase {
private static AppDetails applicant = new AppDetails();
private static SaveApplicantData list = new SaveApplicantData();
public AppFormServletHelper(HttpServlet servlet, HttpServletRequest request, HttpServletResponse response){
super(servlet, request, response);
}
public void doPost() throws ServletException, IOException{
int userID=0;
String stringUserID, firstName, lastName, address, mobile, landLine;
String sex, university;
stringUserID = request.getParameter((Integer.toString(userID)));
firstName = request.getParameter("firstName");
lastName = request.getParameter("lastName");
address = request.getParameter("address");
mobile = request.getParameter("mobile");
landLine = request.getParameter("landLine");
sex = request.getParameter("sex");
university = request.getParameter("university");
//more request.getParameter lines here
recordApplicantDetails(userID, firstName, lastName, address, mobile, landLine, sex);
recordApplicantEducation(university, uniDateGrad, hsGrad, hsDateGrad, elem, elemDateGrad);
recordApplicantEmployment(companyN, jobRole, jobResp);
//Save data using hibernate
**##Error pointing to this line**
**HibernateSaveData save = new HibernateSaveData();
save.beginHibernateTransaction(applicant);**
list.addApplicantData(applicant);
list.setApplicantData(applicant, list);
request.setAttribute("AppDetails", applicant);
RequestDispatcher dispatch = request.getRequestDispatcher("/WEB-INF/UserDetails.jsp");
dispatch.forward(request, response);
}
//Implementation of recordApplicantDetails method
//Implementation of recordApplicantEducation method
//Implementation of recordApplicantEmployment method
}
这是 ApplicationFormServletBase 类
@WebServlet("/appFormServlet")
public class ApplicationForm extends HttpServlet {
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
AppFormServletHelper controllerHelper = new AppFormServletHelper(this,req, resp);
controllerHelper.doPost();
}
这是我的 HibernateSaveData 类
public class HibernateSaveData {
private Session session;
public void beginHibernateTransaction(AppDetails details){
session = new HibernateFactoryUtil().getSessionFactory().openSession();
try{
session.beginTransaction();
session.save(details);
session.getTransaction().commit();
}
catch (HibernateException e){
if (session.getTransaction()!=null){
session.getTransaction().rollback();
}
System.out.println("Hibernate exception occured: "+ e);
}
finally {
session.close();
}
}
}
此外，我已经配置了我的 hibernate.cfg.xml 并且我正在为 servlet 使用 @WebServlet 注释，所以我没有配置任何 xml 映射。我没有发布所有代码，但如果它有助于解决这个问题，我会发布它们。谁能帮我这个？提前致谢。
更新
这就是我设置文件夹的方式
这是我的 hibernate.cfg.xml
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.url">jdbc:postgresql://localhost:5432/ApplicationForm</property>
<property name="connection.username">postgres</property>
<property name="connection.password">password</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">create</property>
<!-- Names the annotated entity class -->
<mapping class="com.ApplicationForm.StoreData.AppDetails"/>
</session-factory>
</hibernate-configuration>