Hibernate框架中的,could not find the main class 的问题

J2EE 码拜 6年前 (2015-05-10) 296次浏览 0个评论
 

实体类如下:
com.mys.model

package com.mys.model;
// default package

import java.util.Date;


/**
 * User entity. @author MyEclipse Persistence Tools
 */

public class User  implements java.io.Serializable {


    // Fields    

     private String id;
     private String userName;
     private String userPwd;
     private String sex;
     private Integer age;
     private String jiguan;
     private Date userRegisterTime;


    // Constructors

    /** default constructor */
    public User() {
    }

	/** minimal constructor */
    public User(String id, String userName, String userPwd, Date userRegisterTime) {
        this.id = id;
        this.userName = userName;
        this.userPwd = userPwd;
        this.userRegisterTime = userRegisterTime;
    }
    
    /** full constructor */
    public User(String id, String userName, String userPwd, String sex, Integer age, String jiguan, Date userRegisterTime) {
        this.id = id;
        this.userName = userName;
        this.userPwd = userPwd;
        this.sex = sex;
        this.age = age;
        this.jiguan = jiguan;
        this.userRegisterTime = userRegisterTime;
    }

   
    // Property accessors

    public String getId() {
        return this.id;
    }
    
    public void setId(String id) {
        this.id = id;
    }

    public String getUserName() {
        return this.userName;
    }
    
    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserPwd() {
        return this.userPwd;
    }
    
    public void setUserPwd(String userPwd) {
        this.userPwd = userPwd;
    }

    public String getSex() {
        return this.sex;
    }
    
    public void setSex(String sex) {
        this.sex = sex;
    }

    public Integer getAge() {
        return this.age;
    }
    
    public void setAge(Integer age) {
        this.age = age;
    }

    public String getJiguan() {
        return this.jiguan;
    }
    
    public void setJiguan(String jiguan) {
        this.jiguan = jiguan;
    }

    public Date getUserRegisterTime() {
        return this.userRegisterTime;
    }
    
    public void setUserRegisterTime(Date userRegisterTime) {
        this.userRegisterTime = userRegisterTime;
    }

}

业务类如下:
com.mys.util

package com.mys.util;
	/**
	 * 我们必须启动Hibernate,此过程包括创建一个全局的SessoinFactory,并把它储存在应用程序代码容易访问的地方。
	 */

import java.util.List;

import com.mys.model.*;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class HibernateUtil{

 private static final SessionFactory sessionFactory;

	    static {
	        try {
	            // Create the SessionFactory from hibernate.cfg.xml
	           //以前hibernate文档里的: sessionFactory = new Configuration().configure().buildSessionFactory();
	            
	             Configuration config=new Configuration();
	              config.configure();
	             config.addClass(User.class);//完整类名?
	             sessionFactory=config.buildSessionFactory();
	            
	        } catch (Throwable ex) {
	            // Make sure you log the exception, as it might be swallowed
	            System.err.println("Initial SessionFactory creation failed." + ex);
	            throw new ExceptionInInitializerError(ex);
	        }
	    }

	  
//	     查询用户信息
	     public void showUsers()
	     {
	     Session session = sessionFactory.openSession();
	     Transaction tx=null;
	     try{
	      tx=session.beginTransaction();
	     Query query=session.createQuery("from tb_User as u");
	     List list=query.list();//List是util.*类库里的接口
	     System.out.println("id"+"用户名"+"用户密码"+"性别"+"年龄"+"籍贯"+"注册时间");
	     for(int i=0;i<list.size();i++)
	     {
	     User u=(User)list.get(i);
	     System.out.print(u.getId());
//	     省略部分
	     System.out.print(u.getUserName());
	     System.out.print(u.getUserPwd());
	     System.out.print(u.getSex());
	     System.out.print(u.getAge());
	     System.out.print(u.getJiguan());
	     System.out.print(u.getUserRegisterTime());
	     System.out.println("");
	     }
	     tx.commit();
	     }
	     catch(Exception e){
	     e.printStackTrace();
	     }finally{
	     session.close();
	     }
	     }
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		HibernateUtil h=new HibernateUtil();
     	h.showUsers();
	}

}

配置文件hibernate.cfg.xml如下:

<?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">
<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

	<session-factory>
		<property name="dialect">
			org.hibernate.dialect.MySQLDialect
		</property>
		<property name="connection.url">
			jdbc:mysql://localhost:3306/db_test
		</property>
		<property name="connection.username">root</property>
		<property name="connection.password">425175</property>
		<property name="connection.driver_class">
			com.mysql.jdbc.Driver
		</property>
		<property name="myeclipse.connection.profile">
			com.mysql.jdbc.Driver
		</property>
		<mapping resource="./User.hbm.xml" />

	</session-factory>

</hibernate-configuration>

映射文件在src目录下User.hbm.xml:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd ">
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="User" table="db_user" catalog="db_test">
        <id name="id" type="java.lang.String">
            <column name="id" length="15" />
            <generator class="assigned"></generator>
        </id>
        <property name="userName" type="java.lang.String">
            <column name="userName" length="20" not-null="true" />
        </property>
        <property name="userPwd" type="java.lang.String">
            <column name="userPwd" length="20" not-null="true" />
        </property>
        <property name="sex" type="java.lang.String">
            <column name="sex" length="4" />
        </property>
        <property name="age" type="java.lang.Integer">
            <column name="age" />
        </property>
        <property name="jiguan" type="java.lang.String">
            <column name="jiguan" length="20" />
        </property>
        <property name="userRegisterTime" type="java.util.Date">
            <column name="userRegisterTime" length="10" not-null="true" />
        </property>
    </class>
</hibernate-mapping>

我想用Hibernate实现一个查询数据库里所有数据的功能,映射文件和实体类都是自动生成的,业务类是自己参照着数编写的。
错误如下:
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Initial SessionFactory creation failed.org.hibernate.InvalidMappingException: Could not parse mapping document from resource ./User.hbm.xml
java.lang.ExceptionInInitializerError
at com.mys.util.HibernateUtil.<clinit>(HibernateUtil.java:32)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from resource ./User.hbm.xml
at org.hibernate.cfg.Configuration.addResource(Configuration.java:569)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1587)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1555)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1534)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1508)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1414)
at com.mys.util.HibernateUtil.<clinit>(HibernateUtil.java:25)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from input stream
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:508)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:566)
… 7 more
Caused by: org.dom4j.DocumentException: http://hibernate.org/dtd/hibernate-mapping-3.0.dtd%20 Nested exception: http://hibernate.org/dtd/hibernate-mapping-3.0.dtd%20
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:499)
… 8 more
Exception in thread “main” 

25分
异常信息中没有:could not find the main class 

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