遨游Hibernate之一

 写一个简单的Hibernate测试程序
1.使用软件:Eclipse3.2; Hibernate开发包3.2; MySQL5.0; MySQL驱动程序
2.程序目录结构
Hibernate_Mysql
       src
            BusinessManager
                   Test.java
            model
                    Student.java
                    Student.hbm.xml
  

        persistence
                     DAOImp.java
             hibernate.cfg.xml

3开始
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1.在Mysql 中创建数据库Student,然后建表student_table,表的字段对照Student.java的私有成员变量

2.编写java文件Student.java

/** */ /**
 * @author tiger Create Date 2006-11-25
 *
 * Blog: tiger.ptuhaiwai.com
 */
package  model;

public   class  Student  ... {
    
    private String id;
    private String uname;
    private String pwd;
    private String email;
    private int age;
         //此处补充get()/set()方法;
        //提示使用Eclipse的代码产生工具来做

}

3.构建包路径,将Hibernate包下Hibernate3.2.jar,和lib/*.jar包加进来
   然后在添加mysql driver驱动包.

4.编写操作数据库的Java文件DAOImp.java/这里先放空,在<遨游二>在使用.

/** */ /**
 * @author tiger Create Date 2006-11-25
 *
 * Blog: tiger.ptuhaiwai.com
 */
package  persistence;
import  java.util.List;
import  model.Student;
import  org.hibernate.HibernateException;
import  org.hibernate.Query;
import  org.hibernate.Session;
import  org.hibernate.Transaction;
public   class  DAOImp  ... {

    //public static void createStu(Student stu){}
    //public static void delStu(String id){}
        //public static void mdfStu(Student stu){}
        //public static List getAllStu(){}
}

5.配置Hibernate的描述文件hibernate.cfg.xml

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE hibernate-configuration
    PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" >

< hibernate-configuration >
  < session-factory >
    < property  name ="show_sql" > true </ property >
    < property  name ="connection.driver_class" >
      com.mysql.jdbc.Driver
    </ property >
    < property  name ="connection.url" >
        jdbc:mysql://localhost:3306/Student
    </ property >
        < property  name ="hibernate.connection.username" > root </ property >
     < property  name ="hibernate.connection.password" > 123456 </ property >
    < property  name ="dialect" >
       org.hibernate.dialect.MySQLDialect
    </ property >
    < property  name ="hibernate.transaction.factory_class" > org.hibernate.transaction.JDBCTransactionFactory </ property >
    < mapping  resource ="model/Student.hbm.xml" />
   
  </ session-factory >
</ hibernate-configuration >

6.创建一个映射文件Student.hbm.xml

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"  >
< hibernate-mapping >

< class  name ="model.Student"  table ="Student_table" >
< id  name ="id"  unsaved-value ="null" >
  < generator  class ="uuid.hex" />
</ id >
< property 
     name ="pwd"  
    type ="string"   />
< property 
     name ="uname"  
    type ="string"   />
< property 
     name ="email"  
    type ="string"   />
< property 
     name ="age"  
    type ="int"   />
    
</ class >
</ hibernate-mapping >

7.最后编写一个测试文件:Test.java

/** */ /**
 * @author tiger Create Date 2006-11-26
 *
 * Blog: tiger.ptuhaiwai.com
 */
package  BusinessManager;
import  model.Student;

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


/** */ /**
 * @author Administrator
 *
 */
public   class  Test  ... {

    /** *//**
     * @param args
     */
    public static void main(String[] args) ...{
        // TODO Auto-generated method stub

        try...{
            SessionFactory sf = new Configuration().configure().buildSessionFactory();
            Session session = sf.openSession();
            Transaction tx = session.beginTransaction();
            
            Student u = new Student();
            u.setName("Justin");
            u.setPwd("fff");
            u.setAge(11);
            u.setEmail("233131312");

            session.save(u);
            tx.commit();
            session.close();
        } catch (HibernateException e) ...{
            e.printStackTrace();
        }
    }

}

********************************************************
PS:运行时会提示的警告:....log4j not found.....Hibernate.property not found..........
那就把这两个文件加入到bin目录下(输出目录)
log4j.properties下面给个网上的某人的例子．

log4j.rootCategory = DEBUG , stdout , R

# Set the level to DEBUG if you want to log all SlideExceptions (some of them aren't errors)
log4j.category.org.apache.slide.common.SlideException = FATAL

########################################
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout

# Pattern to output the caller's file name and line number.
#log4j.appender.stdout.layout.ConversionPattern = %5p  [ %t ]  (%F:%L) - %m%n
#log4j.appender.stdout.layout.ConversionPattern = %4p  [ %t ]  %c - %m%n
log4j.appender.stdout.layout.ConversionPattern = [ %t ]  %-5p %-20c{ 2 } - %m %n 

log4j.appender.R = org.apache.log4j.RollingFileAppender
log4j.appender.R.File = logger.log

log4j.appender.R.ImmediateFlush = true

log4j.appender.R.MaxFileSize = 100KB
# Keep one backup file
log4j.appender.R.MaxBackupIndex = 1

log4j.appender.R.layout = org.apache.log4j.PatternLayout
#log4j.appender.R.layout.ConversionPattern = %p %t %c - %m%n
#log4j.appender.R.layout.ConversionPattern = %4p  [ %t ]  %c - %m%n
log4j.appender.R.layout.ConversionPattern = %d{ABSOLUTE}  [ %t ]  %-5p %-30c{ 3 } %x - %m %n

hibernate.properties(在Hibernate包内）