Hibernate - 对象创建错误 [英] Hibernate -- object creation error

问题描述

我已经设置并在Eclipse / Juno EE上运行Hibernate 3.6。

我的第一个代码在实例化HN的类配置时给我一个运行时错误。所以 - 确切地说，

  SessionFactory aFactory; 
配置conf; 
  

都很好&运行，

但下面一行

  conf = new配置（）; 
  

抛出 java.lang.ExceptionInInitializerError 。

$ b

代码

  SessionFactory aFactory = new Configuration（）。configure （）.buildSessionFactory（）; 
  

无处不在。

我的hibernate.cfg.xml如下：

 < ;？xml version ='1.0'encoding ='utf-8'？> 
 
 $ b<！DOCTYPE hibernate-configuration PUBLIC 
 -  // Hibernate / Hibernate Configuration DTD 3.0 // EN
http：//www.hibernate .ORG / DTD /休眠配置-3.0.dtd> 
 
< hibernate-configuration> 
< session-factory> 
< property name =connection.driver_class> org.postgresql.Driver< / property> 
< property name =connection.url> jdbc：postgresql：// localhost：5432 / ThisDB< / property> 
< property name =connection.username> postgres< / property> 
< property name =connection.password> somePass< / property> 
< property name =connection.pool_size> 1< / property> 
< property name =dialect> org.hibernate.dialect.PostgreSQLDialect< / property> 
< property name =cache.provider_class> org.hibernate.cache.NoCacheProvider< / property> 
< property name =show_sql> true< / property> 
< property name =hbm2ddl.auto>建立< / property> 
< mapping class =dataObjs.someItems/> 
< / session-factory> 
< / hibernate-configuration> 
  

我从同一个项目中复制了！DOCTYPE标记
的内容我下载的包 - 所以它应该没问题。

我的库全部添加到项目中并导入到类中。

代码在创建非Hibernate对象时没有提供任何此类错误。

我缺少什么？

HN的新功能。这是我的第一个代码。

// ================================= ====

编辑：添加代码& stacktrace：

  package somePaket; 
 
 import org.hibernate.Session; 
 import org.hibernate.SessionFactory; 
导入org.hibernate.cfg.Configuration; 
 
导入dataObjs.someItems; 
 
 public class firstClass {
 public static void main（String [] args）{
 System.out.println（.......... see this .........）; 
 
 someItems kullanici = new someItems（）; 
 itm.setID（1）; 
 itm.setType（aaa）; 
 
 SessionFactory aFactory; 
配置conf = new配置（）;; 
 
新配置（）; 
新配置（）。configure（）。buildSessionFactory（）; 
 
 
  

完整登录控制台：

  ..........看到......... 
 SLF4J：加载类失败org.slf4j.impl.StaticLoggerBinder。 
 SLF4J：默认为无操作（NOP）记录器实现
 SLF4J：有关详细信息，请参阅http://www.slf4j.org/codes.html#StaticLoggerBinder。 
在线程main中的异常java.lang.ExceptionInInitializerError $ b $在org.hibernate.cfg.Configuration.reset（Configuration.java:332）
在org.hibernate.cfg.Configuration。< ; init>（Configuration.java:298）
 at org.hibernate.cfg.Configuration。< init>（Configuration.java:302）
 at somePaket.firstClass.main（firstClass.java:18 ）
导致：java.lang.NullPointerException $ b $ org.hibernate.util.ConfigHelper.getResourceAsStream（ConfigHelper.java:167）
 org.hibernate.cfg.Environment。< clinit> ;（Environment.java:618）
 ... 4 more 
  

// == ===================

EDIT2：

在调试器中追踪它：

  LoggerFactory.singleImplementationSanityCheck（）
  

在其行216处引用以下内容：

  FileNotFoundException（Throwable ）。< init>（String）line：264. 
  

  > slf4j-simple-1.6.2.jar 
  

I've set up and am running Hibernate 3.6 on Eclipse/Juno EE.

My first code is giving me a runtime error on instantiating the class Configuration of HN. So-- to be precise,

SessionFactory aFactory;
Configuration conf; 

are fine & running,

but the line next below

conf=new Configuration();

is throwing java.lang.ExceptionInInitializerError.

The code

SessionFactory aFactory = new Configuration().configure().buildSessionFactory(); 

is nowhere near running.

My hibernate.cfg.xml is as follows:

<?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">

<hibernate-configuration>
<session-factory>
    <property name="connection.driver_class">org.postgresql.Driver</property>       
    <property name="connection.url">jdbc:postgresql://localhost:5432/ThisDB</property>  
    <property name="connection.username">postgres</property>
    <property name="connection.password">somePass</property>
    <property name="connection.pool_size">1</property>
    <property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>  
    <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
    <property name="show_sql">true</property>
    <property name="hbm2ddl.auto">create</property>
    <mapping class="dataObjs.someItems"/>  
</session-factory>
</hibernate-configuration>

I copied the contents of the "!DOCTYPE" tag from a project in the same pack I downloaded-- so it should be fine.

My libraries are all added to the project and are imported in the class.

The code is not giving any such errors on creation of "non-Hibernate" objects.

What am i missing?

New to HN. this my first code.

//=====================================

EDIT: Adding the code & the stacktrace:

package somePaket;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

import dataObjs.someItems;

public class firstClass{
public static void main(String[] args) {
    System.out.println("..........see this.........");

    someItems kullanici = new someItems();
    itm.setID(1);
    itm.setType("aaa");

    SessionFactory aFactory;
    Configuration conf=new Configuration();;

    new Configuration();
    new Configuration().configure().buildSessionFactory();
}
}

the full log on Console:

..........see this.........
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.
Exception in thread "main" java.lang.ExceptionInInitializerError
    at org.hibernate.cfg.Configuration.reset(Configuration.java:332)
    at org.hibernate.cfg.Configuration.<init>(Configuration.java:298)
    at org.hibernate.cfg.Configuration.<init>(Configuration.java:302)
    at somePaket.firstClass.main(firstClass.java:18)
Caused by: java.lang.NullPointerException
    at org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:167)
    at org.hibernate.cfg.Environment.<clinit>(Environment.java:618)
    ... 4 more

//=====================

EDIT2:

Traced it in Debugger:

LoggerFactory.singleImplementationSanityCheck()

is throwing the following at its line 216:

FileNotFoundException(Throwable).<init>(String) line: 264. 

解决方案

You may have to include your slf4j library with the application:

slf4j-simple-1.6.2.jar

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