hibernate操作步骤（代码部分）

1.加载hibernate的核心配置文件

2.创建SessionFactory对象

3.使用SessionFactory创建Session对象

4.开启事务（手动开启）

5.写具体逻辑crud，增删改查操作

6.提交事物

7.关闭资源

代码如下：

 package com.hui.hibernate;

 import org.hibernate.Session;

 import org.hibernate.SessionFactory;

 import org.hibernate.Transaction;

 import org.hibernate.cfg.Configuration;

 import org.junit.Test;

 public class HibernateDemo01 {

     public static void main(String[] args) {

         add();

     }

     @SuppressWarnings("deprecation")

     @Test

     public static void add() {

 //        1.加载hibernate的核心配置文件

         Configuration con = new Configuration();//加载配置文件的对象，在src下找到hibernate.cfg.xml文件放到对象中

         con.configure();//开始加载

 //

 //        2.创建SessionFactory对象,读取核心配置文件内容创建SessionFactory，根据映射关系创建表

         SessionFactory sf = con.buildSessionFactory();

 //        3.使用SessionFactory创建Session对象

         //类似于连接

         Session se = sf.openSession();

 //        4.开启事务（手动开启）

         Transaction tr = se.beginTransaction();

 //        5.写具体逻辑crud，增删改查操作,操作实体类对象

         User u = new User();//uid不用设置值，他为自增长的主键

         u.setUsername("刘冬冬");

         u.setPassword("123456");

         u.setAddress("中国陕西");

         //调用Session方法save完成操作

         se.save(u);

 //        6.提交事物

         tr.commit();

 //        7.关闭资源

         se.close();

         sf.close();

     }

 }

8.测试，运行报错

报的错误如下

log4j:WARN No appenders could be found for logger (org.jboss.logging).

log4j:WARN Please initialize the log4j system properly.

log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

Exception in thread "main" org.hibernate.InvalidMappingException: Unable to read XML

    at org.hibernate.internal.util.xml.MappingReader.legacyReadMappingDocument(MappingReader.java:375)

    at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:304)

    at org.hibernate.cfg.Configuration.add(Configuration.java:518)

    at org.hibernate.cfg.Configuration.add(Configuration.java:514)

    at org.hibernate.cfg.Configuration.add(Configuration.java:688)

    at org.hibernate.cfg.Configuration.addResource(Configuration.java:771)

    at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2257)

    at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2229)

    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2209)

    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2162)

    at org.hibernate.cfg.Configuration.configure(Configuration.java:2077)

    at org.hibernate.cfg.Configuration.configure(Configuration.java:2056)

    at com.hui.hibernate.HibernateDemo01.add(HibernateDemo01.java:21)

    at com.hui.hibernate.HibernateDemo01.main(HibernateDemo01.java:12)

Caused by: org.xml.sax.SAXParseException; lineNumber: 22; columnNumber: 40; 必须为元素类型 "id" 声明属性 "colnum"。

    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)

    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)

    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396)

    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)

    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284)

    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.addDTDDefaultAttrsAndValidate(XMLDTDValidator.java:1253)

    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleStartElement(XMLDTDValidator.java:1917)

    at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:742)

    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:380)

    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2787)

    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)

    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:118)

    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)

    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)

    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)

    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)

    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)

    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)

    at org.dom4j.io.SAXReader.read(SAXReader.java:465)

    at org.hibernate.internal.util.xml.MappingReader.legacyReadMappingDocument(MappingReader.java:325)

    ... 13 more

原因：如下图红线部分column写成了colnum，所以hibernate不能识别了，因而报错改回来就成了

9.改后测试结果如下：创建了表t_user而且插入了一条数据