做SSH整合时，先测试一个hibernate测试，总是出现初始化错误

Question

News.java

package mc.bean;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.Table;

@Entity

@Table(name="news_inf")

public class News {

// 消息类的标识属性

@Id

@GeneratedValue(strategy=GenerationType.IDENTITY)

private Integer id;

// 消息标题

private String title;

// 消息内容

private String content;

省略setter和getter方法

Main方法

package mc.bean;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

public class MainTest {

public static void main(String[] args) {

// TODO Auto-generated method stub

// 实例化Configuration，不加载任何配置文件

Configuration conf = new Configuration()

// 通过addAnnotatedClass()方法添加持久化类

.addAnnotatedClass(mc.bean.News.class)*

// 通过setProperty设置Hibernate的连接属性。

.setProperty("hibernate.connection.driver_class"

, "com.mysql.jdbc.Driver")

.setProperty("hibernate.connection.url"

, "jdbc:mysql://localhost:3306/mctest")

.setProperty("hibernate.connection.username" , "root")

.setProperty("hibernate.connection.password" , "123457")

.setProperty("hibernate.c3p0.max_size" , "20")

.setProperty("hibernate.c3p0.min_size" , "1")

.setProperty("hibernate.c3p0.timeout" , "5000")

.setProperty("hibernate.c3p0.max_statements" , "100")

.setProperty("hibernate.c3p0.idle_test_period" , "3000")

.setProperty("hibernate.c3p0.acquire_increment" , "2")

.setProperty("hibernate.c3p0.validate" , "true")

.setProperty("hibernate.dialect"

, "org.hibernate.dialect.MySQLDialect")

.setProperty("hibernate.hbm2ddl.auto" , "update");

// 以Configuration实例创建SessionFactory实例

ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()

.applySettings(conf.getProperties()).build();

SessionFactory sf = conf.buildSessionFactory(serviceRegistry);

// 实例化Session

Session sess = sf.openSession();

// 开始事务

Transaction tx = sess.beginTransaction();

// 创建消息实例

News n = new News();

// 设置消息标题和消息内容

n.setTitle("00000");

n.setContent("0000000");

// 保存消息

sess.save(n);

// 提交事务

tx.commit();

System.out.println("操作成功！");

// 关闭Session

sess.close();

}

}

异常

十一月 12, 2016 3:11:45 下午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager

INFO: HCANN000001: Hibernate Commons Annotations {4.0.4.Final}

十一月 12, 2016 3:11:45 下午 org.hibernate.Version logVersion

INFO: HHH000412: Hibernate Core {4.3.5.Final}

Exception in thread "main" java.lang.ExceptionInInitializerError

at org.hibernate.cfg.Configuration.reset(Configuration.java:324)

at org.hibernate.cfg.Configuration.(Configuration.java:289)

at org.hibernate.cfg.Configuration.(Configuration.java:293)

at mc.bean.MainTest.main(MainTest.java:15)

Caused by: java.lang.NullPointerException

at org.hibernate.internal.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)

at org.hibernate.cfg.Environment.(Environment.java:221)

... 4 more

Answer 1

http://blog.csdn.net/u013456370/article/details/43575511