我已经看到了你的所有建议但没有人帮助我请在hibernate注释中解决我在j2ee curd操作中的错误.. 请帮我解决hibernate注释中的问题
这是我的pojo课程
package com.pojo1;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name="csl_employee")
public class Student {
@Id
@Column(name="ID")
@GeneratedValue(strategy=GenerationType.AUTO)
private int id;
@Column(name="fname")
private String fname;
@Column(name="lname")
private String lname;
@Column(name="add")
private String add;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getFname() {
return fname;
}
public void setFname(String fname) {
this.fname = fname;
}
public String getLname() {
return lname;
}
public void setLname(String lname) {
this.lname = lname;
}
public String getAdd() {
return add;
}
public void setAdd(String add) {
this.add = add;
}
}
this is my Jsp File
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<form action="Studentdemoservlet" method="post">
<table>
<tr>
<td>First Name:</td>
<td><input type="text" name="fname"></td>
</tr>
<tr>
<td>Last Name:</td>
<td><input type="text" name="lname"></td>
</tr>
<tr>
<td>Address:</td>
<td><input type="text" name="add"></td>
</tr>
<tr>
<td><input type="submit" name="action" value="submit"></td>
</tr>
</table>
</form>
</body>
</html>
this is my servlet
package com.pojo1;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class Studentdemoservlet
*/
public class Studentdemoservlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public Studentdemoservlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String fname=request.getParameter("fname");
String lname=request.getParameter("lname");
String add=request.getParameter("add");
Student student=new Student();
student.setFname(fname);
student.setLname(lname);
student.setAdd(add);
CreateStudent.intercourse(student);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
this is my Insert method for student in hibernate
package com.pojo1;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
public class CreateStudent {
public static void intercourse(Student student) {
SessionFactory sessionFactory;
sessionFactory=Util.getSessionFactory();
Session session=sessionFactory.openSession();
Transaction t=session.beginTransaction();
session.save(student);
t.commit();
session.close();
sessionFactory.close();
}
}
this is my Util Class
package com.pojo1;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
public class Util {
private static final SessionFactory sessionFactory;
static
{
try
{
sessionFactory=new AnnotationConfiguration().configure().buildSessionFactory();
}
catch(Throwable th){
throw new ExceptionInInitializerError(th);
}
}
public static SessionFactory getSessionFactory(){
return sessionFactory;
}
}
this is my configuration file
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/javadb</property>
<property name="hibernate.connection.username">root</property>
<property name="connection.pool_size">1</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="current_session_context_class">thread</property>
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<property name="show_sql">true</property>
<!-- <property name="hbm2ddl.auto">update</property>
<mapping class="com.pojo1.Student"/> -->
</session-factory>
</hibernate-configuration>
and i have getting erro like this
Sep 5, 2013 11:51:25 AM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\java\jdk1.6.0_43\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/java/jdk1.6.0_43/bin/../jre/bin/server;C:/Program Files/java/jdk1.6.0_43/bin/../jre/bin;C:/Program Files/java/jdk1.6.0_43/bin/../jre/lib/amd64;C:\Windows\System32;C:\Program Files\java\jdk1.6.0_43\bin;C:\Program Files\apache-ant-1.8.4\bin;C:\Program Files (x86)\MySQL\MySQL Server 5.0\bin;C:\Users\Dell\AppData\Local\Smartbar\Application\;D:\eclipse;;.
Sep 5, 2013 11:51:25 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:crudhibernate' did not find a matching property.
Sep 5, 2013 11:51:25 AM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:crudannotation' did not find a matching property.
Sep 5, 2013 11:51:25 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Sep 5, 2013 11:51:25 AM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
Sep 5, 2013 11:51:25 AM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1050 ms
Sep 5, 2013 11:51:25 AM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Sep 5, 2013 11:51:25 AM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.40
Sep 5, 2013 11:51:26 AM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(E:\projects\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\crudannotation\WEB-INF\lib\servlet-api.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/core_rt is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/core is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/core is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/fmt_rt is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/fmt is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/fmt is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/functions is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://jakarta.apache.org/taglibs/standard/permittedTaglibs is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://jakarta.apache.org/taglibs/standard/scriptfree is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/sql_rt is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/sql is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/sql is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/xml_rt is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/xml is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/xml is already defined
Sep 5, 2013 11:51:27 AM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(E:\projects\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\crudhibernate\WEB-INF\lib\servlet-api.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/core_rt is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/core is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/core is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/fmt_rt is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/fmt is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/fmt is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/functions is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://jakarta.apache.org/taglibs/standard/permittedTaglibs is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://jakarta.apache.org/taglibs/standard/scriptfree is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/sql_rt is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/sql is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/sql is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/xml_rt is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jstl/xml is already defined
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.TaglibUriRule body
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/xml is already defined
Sep 5, 2013 11:51:28 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Sep 5, 2013 11:51:28 AM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Sep 5, 2013 11:51:28 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2878 ms
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Sep 5, 2013 11:51:38 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [Studentdemoservlet] in context with path [/crudannotation] threw exception
org.hibernate.MappingException: Unknown entity: com.pojo1.Student
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:548)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1338)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:96)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:186)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:175)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at com.pojo1.CreateStudent.intercourse(CreateStudent.java:20)
at com.pojo1.Studentdemoservlet.doGet(Studentdemoservlet.java:38)
at com.pojo1.Studentdemoservlet.doPost(Studentdemoservlet.java:48)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1008)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
at java.lang.Thread.run(Thread.java:662)
答案 0 :(得分：0)
这根本不起作用，因为你必须在会话工厂配置中列出你的类。
为了使用带有hibernate和spring的注释，你必须使用AnnotationSessionFactoryBean
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="annotatedClasses">
<list>
<value>com.pojo1</value>
</list>
</property>
....
</bean>
或者如果您不使用spring，则可以通过在 persistence.xml 文件中声明yoyr实体类来列出会话工厂配置中的类：
<persistence ...>
<persistence-unit ...>
<class>com.pojo1</class>
<class>com.pojo2</class>
</persistence-unit>
</persistence>
希望这能解决您的问题