Question

我在maven项目中使用hibernate 4.3.11和struts2 2.3.33，我试图用mysql测试我的hibernate，然后弹出Exception，似乎我的xml文件格式正确，并且也没有其他地方有我可以找到的重复资源映射，所以我真的需要一些帮助，感谢任何建议。

这是我的目录 http://imgur.com/PfO1mj5

异常错误 http://imgur.com/WHpkJwd

的hibernate.cfg.xml

<session-factory>
    <property name="show_sql">true</property>
    <property name="myeclipse.connection.profile">bookshop</property>
    <property name="connection.url">
        jdbc:mysql://localhost:3306/Bookshop?useSSL=false
    </property>
    <property name="connection.username">root</property>
    <property name="connection.password">root</property>
    <property name="connection.driver_class">
        com.mysql.jdbc.Driver
    </property>
    <property name="dialect">
        org.hibernate.dialect.MySQLDialect
    </property>
    <mapping resource="com/hibtest2/entity/Users.hbm.xml" />
</session-factory>

    <?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.hibtest2.entity.Users" table="users" catalog="bookshop">
        <id name="id" type="java.lang.Integer">
            <column name="Id" />
            <generator class="native"></generator>
        </id>
        <property name="loginName" type="java.lang.String">
            <column name="LoginName" length="50" />
        </property>
        <property name="loginPwd" type="java.lang.String">
            <column name="LoginPwd" length="16" />
        </property>
        <property name="name" type="java.lang.String">
            <column name="Name" length="16" />
        </property>
        <property name="address" type="java.lang.String">
            <column name="Address" length="16" />
        </property>
        <property name="phone" type="java.lang.String">
            <column name="Phone" length="16" />
        </property>
        <property name="mail" type="java.lang.String">
            <column name="Mail" length="16" />
        </property>
        <property name="userRoleId" type="java.lang.Integer">
            <column name="UserRoleId" length="4" />
        </property>
        <property name="userStateId" type="java.lang.Integer">
            <column name="UserStateId" length="4" />
        </property>
    </class>
</hibernate-mapping>

这是我的测试课 Test.java

package com.hibtest2;

import com.hibtest2.dao.UserDAO;
import com.hibtest2.dao.UserDAOImpl;
import com.hibtest2.entity.Users;

public class Test {
    /**
     * @param args
     */
    public static void main(String[] args) {
        Test test = new Test();
        // 依次測試testAdd、testDelete和testUpdate方法
        // test.testAdd();
        // test.testDelete(new Integer(9));
        test.testUpdate();
    }

    // 加入資料
    public void testAdd() {
        Users users = new Users();
        users.setLoginName("New York");
        users.setLoginPwd("123456");
        UserDAO userDao = new UserDAOImpl();
        userDao.add(users);
    }

    // 移除資料
    public void testDelete(Integer id) {
        UserDAO userDao = new UserDAOImpl();
        Users users = userDao.load(id);
        userDao.delete(users);
    }

    // 修改資料
    public void testUpdate() {
        UserDAO userDao = new UserDAOImpl();
        Users users = userDao.load(new Integer(2));
        users.setLoginPwd("210000");
        userDao.update(users);
    }

}

UserDAOImpl.java

package com.hibtest2.dao;

import java.util.List;

import com.hibtest2.entity.Users;

public class UserDAOImpl extends BaseHibernateDAO implements UserDAO {
    //加入資料
    public void add(Users users) {
        super.add(users);
    }
    //移除資料
    public void delete(Users users) {
        super.delete(users);
    }
    //載入資料
    public Users load(Integer id) {
        return (Users)super.get(Users.class, id);
    }
    //修改資料
    public void update(Users users) {
        super.update(users);
    }
    //登入驗證
    public boolean validate(String loginName, String loginPwd) {
        // TODO Auto-generated method stub
        boolean flag=false;
        //封裝查詢條件
        Users condition=new Users();
        condition.setLoginName(loginName);
        condition.setLoginPwd(loginPwd);
        //呼叫BaseHibernateDAO類別中的search方法
        List list=super.search(Users.class, condition);
        if(list.size()>0){
            flag=true; 
        }
        return flag;
    }

}

BaseHibernateDAO.java

package com.hibtest2.dao;

import java.io.Serializable;
import java.util.List;

import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.criterion.Example;

import com.hibtest2.HibernateSessionFactory;
import com.sun.org.apache.regexp.internal.recompile;

public abstract class BaseHibernateDAO {

    protected void add(Object object) {
        Transaction tran = null;
        // 取得session
        Session session = HibernateSessionFactory.getSession();
        try {
            // 開始交易
            tran = session.beginTransaction();
            // 持久化動作
            session.save(object);
            // 傳送交易
            tran.commit();
        } catch (Exception e) {
            if (tran != null) {
                // 交易返回
                tran.rollback();
            }
            e.printStackTrace();
        } finally {
            // 關閉session
            session.close();
        }
    }


    protected Object get(Class cla, Serializable id) {
        Object object = null;
        Session session = HibernateSessionFactory.getSession();
        try {
            object = session.get(cla, id);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            session.close();
        }
        return object;
    }


    protected void delete(Object object) {
        Transaction tran = null;
        Session session = HibernateSessionFactory.getSession();
        try {
            tran = session.beginTransaction();
            session.delete(object);
            tran.commit();
        } catch (Exception e) {
            if (tran != null) {
                tran.rollback();
            }
            e.printStackTrace();
        } finally {
            session.close();
        }
    }


    protected void update(Object object) {
        Transaction tran = null;
        Session session = HibernateSessionFactory.getSession();
        try {
            tran = session.beginTransaction();
            session.update(object);
            tran.commit();
        } catch (Exception e) {
            if (tran != null) {
                tran.rollback();
            }
            e.printStackTrace();
        } finally {
            session.close();
        }
    }


    protected List search(Class cla, Object condition) {
        Session session = null;
        List list = null;
        try {
            session = HibernateSessionFactory.getSession();
            list = session.createCriteria(cla).add(Example.create(condition)).list();
        } catch (Exception e) {
            // TODO: handle exception
        } finally {
            session.close();
        }
        return list;
    }
}

和最后一个HibernateSessionFactory.java

package com.hibtest2;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;


public class HibernateSessionFactory {

    private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private static Configuration configuration = new Configuration();
    private static org.hibernate.SessionFactory sessionFactory;
    private static String configFile = CONFIG_FILE_LOCATION;

    static {
        try {
            configuration.configure(configFile);
            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                    .applySettings(configuration.getProperties()).build();
            SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        } catch (Exception e) {
            System.err.println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }

    private HibernateSessionFactory() {
    }


    public static Session getSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

        if (session == null || !session.isOpen()) {
            if (sessionFactory == null) {
                rebuildSessionFactory();
            }
            session = (sessionFactory != null) ? sessionFactory.openSession() : null;
            threadLocal.set(session);
        }

        return session;
    }


    public static void rebuildSessionFactory() {
        try {
            configuration.configure(configFile);
            ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
                    .applySettings(configuration.getProperties()).build();
            SessionFactory sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        } catch (Exception e) {
            System.err.println("%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }
    }


    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }


    public static org.hibernate.SessionFactory getSessionFactory() {
        return sessionFactory;
    }


    public static void setConfigFile(String configFile) {
        HibernateSessionFactory.configFile = configFile;
        sessionFactory = null;
    }


    public static Configuration getConfiguration() {
        return configuration;
    }

}

Answer 1

InvalidMappingException是NPE的结果，可能是sessionFactory永远不会在rebuildSessionFactory HibernateSessionFactory中分配的sessionFactory = configuration.buildSessionFactory(serviceRegistry); // local scope SessionFactory removed造成的。

/usr/local/nodejs-binary-6.3.0/bin/

Hibernate Struts2 org.hibernate.InvalidMappingException：无法解析资源中的映射文档

1 个答案: