我正在尝试使用hibernate和JSF 2.0将时间表数据发送到数据库。我已经使用DAO对我的数据库进行逆向工程以在我的bean中使用，但是当我尝试提交时遇到以下错误：save failed: Unknown entity: com.hibernate.hours.EmpHours我不确定为什么会发生这种情况。
我们有以下表格：
<h:form>
<table>
<thead>
<tr>
<th>Employee Details</th>
<th id="reqBox" colspan="2">
<span class="reqStar">*</span>
<span class="reqText">Required Field</span>
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
Employee ID <br />
<input name="empID" type="text" value="#{userBean.id}" readonly="readonly"/>
</td>
<td>
Employee Name <br />
<input name="empName" type="text" value="#{userBean.firstName} #{userBean.lastName}" readonly="readonly" />
</td>
<td>
Week Starting <span class="reqStar">*</span> <br />
<input name="weekOf" type="text" value="" />
<a href="javascript:NewCal('demo1','mmddyyyy')">
<img src="images/cal.gif" border="0" alt="Pick a date" width="16" height="16" />
</a>
</td>
</tr>
<tr class="whiteSpacerRow"></tr>
</tbody>
</table>
<table class="content" border="1" rules="none" frame="box" cellpadding="0" cellspacing="0">
<thead>
<tr>
<th colspan="10">Record Timesheet</th>
</tr>
<tr class="header">
<td>Task</td>
<td>Monday</td>
<td>Tuesday</td>
<td>Wednesday</td>
<td>Thursday</td>
<td>Friday</td>
<td>Saturday</td>
<td>Sunday</td>
<td>Total Hours</td>
</tr>
</thead>
<tbody>
<tr class="dateRow">
<td class="blank"></td>
<td id="monday"></td>
<td id="tuesday"></td>
<td id="wednesday"></td>
<td id="thursday"></td>
<td id="friday"></td>
<td id="saturday"></td>
<td id="sunday"></td>
</tr>
<tr id="input_row_1">
<td>
<select name="select_1">
<option>-Select One-</option>
<option value="Development">Regular Hours</option>
<option value="Vacation">Paid Vacation</option>
<option value="LOSSOFPAY">Unpaid Vacation</option>
<option value="REMOTE">Remote Work</option>
</select>
</td>
<td id="mondayInput1">
<h:inputText id="monday1" size="4" value="#{timesheet.monday1}" maxlength="4" required="false" />
<!-- <input name="monday1" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="tuesdayInput1">
<h:inputText id="tuesday1" size="4" value="#{timesheet.tuesday1}" maxlength="4" required="false" />
<!--<input name="tuesday1" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="wednesdayInput1">
<h:inputText id="wednesday1" size="4" value="#{timesheet.wednesday1}" maxlength="4" required="false" />
<!--<input name="wednesday1" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="thursdayInput1">
<h:inputText id="thursday1" size="4" value="#{timesheet.thursday1}" maxlength="4" required="false" />
<!--<input name="thursday1" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="fridayInput1">
<h:inputText id="friday1" size="4" value="#{timesheet.friday1}" maxlength="4" required="false" >
<f:ajax event="change" render="total1" />
</h:inputText>
<!--<input name="friday1" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="saturdayInput1">
<h:inputText id="saturday1" size="4" value="#{timesheet.saturday1}" maxlength="4" required="false" >
<f:ajax event="change" render="total1" listener="#{timesheet.updateTotal1}" />
</h:inputText>
<!--<input name="saturday1" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="sundayInput1">
<!--<h:inputText id="sunday1" size="4" value="#{timesheet.sunday1}" maxlength="4" required="false" />-->
<h:inputText id="sunday1" size="4" value="#{timesheet.sunday1}" maxlength="4" required="false" >
<f:ajax event="keyup" render="total1" />
</h:inputText>
<!--<input name="sunday1" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td>
<!-- <h:inputText id="total1updater" size="4" value="#{timesheet.total1}" maxlength="4" required="false" readonly="true" >
<f:ajax event="change" render="total1" />
</h:inputText> -->
<h:outputText id="total1" value="#{timesheet.total1}" />
<!-- <input name="total1" id="total1" type="text" size="5" readonly="readonly" /> -->
</td>
</tr>
<tr id="input_row_2">
<td>
<select name="select_2">
<option>-Select One-</option>
<option value="Development">Regular Hours</option>
<option value="Vacation">Paid Vacation</option>
<option value="LOSSOFPAY">Unpaid Vacation</option>
<option value="REMOTE">Remote Work</option>
</select>
</td>
<td id="mondayInput2">
<h:inputText id="monday2" size="4" value="#{timesheet.monday2}" maxlength="4" required="false" />
<!-- <input name="monday2" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="tuesdayInput2">
<h:inputText id="tuesday2" size="4" value="#{timesheet.tuesday2}" maxlength="4" required="false" />
<!--<input name="tuesday2" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="wednesdayInput2">
<h:inputText id="wednesday2" size="4" value="#{timesheet.wednesday2}" maxlength="4" required="false" />
<!--<input name="wednesday2" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="thursdayInput2">
<h:inputText id="thursday2" size="4" value="#{timesheet.thursday2}" maxlength="4" required="false" />
<!--<input name="thursday2" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="fridayInput2">
<h:inputText id="friday2" size="4" value="#{timesheet.friday2}" maxlength="4" required="false" onchange="setTotal2()"/>
<!--<input name="friday2" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="saturdayInput2">
<h:inputText id="saturday2" size="4" value="#{timesheet.saturday2}" maxlength="4" required="false" />
<!--<input name="saturday2" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td id="sundayInput2">
<h:inputText id="sunday2" size="4" value="#{timesheet.sunday2}" maxlength="4" required="false" />
<!--<input name="sunday2" class="smallInput" type="number" size="2" maxlength="4" min="0"/> -->
</td>
<td>
<h:inputText id="total2" size="4" value="#{timesheet.total2}" maxlength="4" required="false" readonly="true"/>
<!-- <input name="total2" id="total2" type="text" size="5" readonly="readonly" /> -->
</td>
</tr>
<tr class="green"><th colspan="10">Expenses</th></tr>
<tr class="header">
<td class="blank"></td>
<td>Air Fare</td>
<td>Lodging</td>
<td>Car Rental</td>
<td>Per-Diem</td>
<td class="blank"></td>
<td class="blank"></td>
<td class="blank"></td>
<td>Total Expenses</td>
</tr>
<tr class="greenSpacerRow"></tr>
<tr>
<td class="blank"></td>
<td>
<h:inputText id="airFare" size="6" value="#{timesheet.airFare}" maxlength="8" required="false" />
<!-- <input name="airFare" class="smallInput" type="number" size="4" maxlength="4" min="0"/> -->
</td>
<td>
<h:inputText id="lodging" size="6" value="#{timesheet.lodging}" maxlength="8" required="false" />
<!-- <input name="lodging" class="smallInput" type="number" size="4" maxlength="4" min="0"/> -->
</td>
<td>
<h:inputText id="carRental" size="6" value="#{timesheet.carRental}" maxlength="8" required="false" />
<!-- <input name="carRental" class="smallInput" type="number" size="4" maxlength="4" min="0"/> -->
</td>
<td>
<h:inputText id="perDiem" size="6" value="#{timesheet.perDiem}" maxlength="8" required="false" />
<!-- <input name="perDiem" class="smallInput" type="number" size="4" maxlength="4" min="0"/> -->
</td>
<td class="blank"></td>
<td class="blank"></td>
<td class="blank"></td>
<td>
<input name="expenseTotal" id="expenseTot" class="smallInput" type="text" size="4" maxlength="4" min="0" readonly="readonly"/>
</td>
</tr>
</tbody>
</table>
<table class="content" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td>
<h:commandButton id="submit" action="#{timesheet.submit}" value="Submit" />
<h:commandButton id="cancel" action="#{timesheet.cancel}" value="Cancel" />
<h:commandButton id="Display_Timesheets" action="#{timesheet.displayTimesheets}" value="Display Entered Timesheets" />
<!-- <input type="button" onClick="submitTimesheet()" value="Submit" /> -->
<!-- <input type="button" onClick="cancel()" value="Cancel" /> -->
<!-- <input type="button" onClick="displayTimesheets()" value="Display Entered Timesheets" /> -->
</td>
</tr>
</tbody>
</table>
</h:form>
我的bean.submit（）：
public void submit() {
setTotal1();
setTotal2();
User user = new User();
user.setID( userBean.getId() );
user.setUsername( userBean.getUsername() );
if( total1 > 0 ){
EmpHours hours1 = new EmpHours();
hours1.setUser( user );
hours1.setWeekOf( getDate() );
hours1.setWorkType( getWorkType1() );
hours1.setMonday( getMonday1() );
hours1.setTuesday( getTuesday1() );
hours1.setWednesday( getWednesday1() );
hours1.setThursday( getThursday1() );
hours1.setFriday( getFriday1() );
hours1.setSaturday( getSaturday1() );
hours1.setSunday( getSunday1() );
hours1.setWeekTotal( total1 );
send(hours1);
}
if( total2 > 0 ){
EmpHours hours2 = new EmpHours();
hours2.setUser( user );
hours2.setWeekOf( getDate() );
hours2.setWorkType( getWorkType2() );
hours2.setMonday( getMonday2() );
hours2.setTuesday( getTuesday2() );
hours2.setWednesday( getWednesday2() );
hours2.setThursday( getThursday2() );
hours2.setFriday( getFriday2() );
hours2.setSaturday( getSaturday2() );
hours2.setSunday( getSunday2() );
hours2.setWeekTotal( total2 );
send(hours2);
}
}
private boolean send( EmpHours hours ){
EmpHoursDAO DAO = new EmpHoursDAO();
try{
Transaction tx = DAO.getSession().beginTransaction();
DAO.save( hours ); // <-- the problem is with this line
tx.commit();
} catch(Exception e) {
System.out.print("send: " + e.getMessage());
return false;
} finally {
DAO.getSession().close();
}
return true;
}
和我的DAO文件：
package com.hibernate.hours;
import com.hibernate.user.BaseHibernateDAO;
import java.util.Date;
import java.util.List;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.hibernate.hours.EmpHours;
/**
* A data access object (DAO) providing persistence and search support for
* EmpHours entities. Transaction control of the save(), update() and delete()
* operations can directly support Spring container-managed transactions or they
* can be augmented to handle user-managed Spring transactions. Each of these
* methods provides additional information for how to configure it for the
* desired type of transaction control.
*
* @see com.hibernate.hours.EmpHours
* @author MyEclipse Persistence Tools
*/
public class EmpHoursDAO extends BaseHibernateDAO {
private static final Logger log = LoggerFactory
.getLogger(EmpHoursDAO.class);
// property constants
public static final String WORK_TYPE = "workType";
public static final String MONDAY = "monday";
public static final String TUESDAY = "tuesday";
public static final String WEDNESDAY = "wednesday";
public static final String THURSDAY = "thursday";
public static final String FRIDAY = "friday";
public static final String SATURDAY = "saturday";
public static final String SUNDAY = "sunday";
public static final String WEEK_TOTAL = "weekTotal";
public void save(EmpHours transientInstance) {
log.debug("saving EmpHours instance");
try {
getSession().save(transientInstance); // <-- and the error comes from here
log.debug("save successful");
} catch (RuntimeException re) {
System.err.println("save failed: " + re.getMessage());
log.error("save failed", re);
throw re;
}
}
public void delete(EmpHours persistentInstance) {
log.debug("deleting EmpHours instance");
try {
getSession().delete(persistentInstance);
log.debug("delete successful");
} catch (RuntimeException re) {
log.error("delete failed", re);
throw re;
}
}
public EmpHours findById(java.lang.Long id) {
log.debug("getting EmpHours instance with id: " + id);
try {
EmpHours instance = (EmpHours) getSession().get(
"com.hibernate.hours.EmpHours", id);
return instance;
} catch (RuntimeException re) {
log.error("get failed", re);
throw re;
}
}
public List findByExample(EmpHours instance) {
log.debug("finding EmpHours instance by example");
try {
List results = getSession()
.createCriteria("com.hibernate.hours.EmpHours")
.add(Example.create(instance)).list();
log.debug("find by example successful, result size: "
+ results.size());
return results;
} catch (RuntimeException re) {
log.error("find by example failed", re);
throw re;
}
}
public List findByProperty(String propertyName, Object value) {
log.debug("finding EmpHours instance with property: " + propertyName
+ ", value: " + value);
try {
String queryString = "from EmpHours as model where model."
+ propertyName + "= ?";
Query queryObject = getSession().createQuery(queryString);
queryObject.setParameter(0, value);
return queryObject.list();
} catch (RuntimeException re) {
log.error("find by property name failed", re);
throw re;
}
}
public List findByWorkType(Object workType) {
return findByProperty(WORK_TYPE, workType);
}
public List findByMonday(Object monday) {
return findByProperty(MONDAY, monday);
}
public List findByTuesday(Object tuesday) {
return findByProperty(TUESDAY, tuesday);
}
public List findByWednesday(Object wednesday) {
return findByProperty(WEDNESDAY, wednesday);
}
public List findByThursday(Object thursday) {
return findByProperty(THURSDAY, thursday);
}
public List findByFriday(Object friday) {
return findByProperty(FRIDAY, friday);
}
public List findBySaturday(Object saturday) {
return findByProperty(SATURDAY, saturday);
}
public List findBySunday(Object sunday) {
return findByProperty(SUNDAY, sunday);
}
public List findByWeekTotal(Object weekTotal) {
return findByProperty(WEEK_TOTAL, weekTotal);
}
public List findAll() {
log.debug("finding all EmpHours instances");
try {
String queryString = "from EmpHours";
Query queryObject = getSession().createQuery(queryString);
return queryObject.list();
} catch (RuntimeException re) {
log.error("find all failed", re);
throw re;
}
}
public EmpHours merge(EmpHours detachedInstance) {
log.debug("merging EmpHours instance");
try {
EmpHours result = (EmpHours) getSession().merge(detachedInstance);
log.debug("merge successful");
return result;
} catch (RuntimeException re) {
log.error("merge failed", re);
throw re;
}
}
public void attachDirty(EmpHours instance) {
log.debug("attaching dirty EmpHours instance");
try {
getSession().saveOrUpdate(instance);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
public void attachClean(EmpHours instance) {
log.debug("attaching clean EmpHours instance");
try {
getSession().lock(instance, LockMode.NONE);
log.debug("attach successful");
} catch (RuntimeException re) {
log.error("attach failed", re);
throw re;
}
}
}
和
package com.hibernate.hours;
import java.util.Date;
import com.hibernate.user.User;
/**
* EmpHours entity. @author MyEclipse Persistence Tools
*/
public class EmpHours extends AbstractEmpHours implements java.io.Serializable {
// Constructors
/** default constructor */
public EmpHours() {
}
/** full constructor */
public EmpHours(User user, Date weekOf, String workType, Integer monday,
Integer tuesday, Integer wednesday, Integer thursday,
Integer friday, Integer saturday, Integer sunday, Integer weekTotal) {
super(user, weekOf, workType, monday, tuesday, wednesday, thursday,
friday, saturday, sunday, weekTotal);
}
}
和EmpHours的hibernate映射：
<?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">
<!--
Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
<class name="com.hibernate.hours.EmpHours" table="emp_hours" catalog="secondsql">
<id name="timesheetId" type="java.lang.Long">
<column name="Timesheet_ID" />
<generator class="native" />
</id>
<many-to-one name="user" class="com.hibernate.hours.User" fetch="select">
<column name="ID" length="10" />
</many-to-one>
<property name="weekOf" type="java.util.Date">
<column name="WeekOf" length="10" />
</property>
<property name="workType" type="java.lang.String">
<column name="Work_Type" length="20" />
</property>
<property name="monday" type="java.lang.Integer">
<column name="Monday" />
</property>
<property name="tuesday" type="java.lang.Integer">
<column name="Tuesday" />
</property>
<property name="wednesday" type="java.lang.Integer">
<column name="Wednesday" />
</property>
<property name="thursday" type="java.lang.Integer">
<column name="Thursday" />
</property>
<property name="friday" type="java.lang.Integer">
<column name="Friday" />
</property>
<property name="saturday" type="java.lang.Integer">
<column name="Saturday" />
</property>
<property name="sunday" type="java.lang.Integer">
<column name="Sunday" />
</property>
<property name="weekTotal" type="java.lang.Integer">
<column name="Week_Total" />
</property>
</class>
</hibernate-mapping>