基于Hibernate3.2 Hibernate tools 的使用

Myth丶恋晨 2021-09-10 05:26 293阅读 0赞

由于新发布的Hibernate Tools是一个比较庞大的工具包 而且已经是作为Eclipse3.2 的插件发布的

然而以前的很有用的工具hbm2java和hbm2ddl都是非常有用的工具

所以我们应该把这些有用的工具找出来继续使用

环境

jdk-1\_5\_0\_07

ant 1.6.5

Hibernate 3.2 cr2

Hibernate Tools-3.2.0.beta6

mysql-5.0.22

首先下载Hibernate Tools的包

在HIbernate的主页上有连接 下载是在sourceforge.net

地址：[http://prdownloads.sourceforge.net/jboss/HibernateTools-3.2.0.beta6a.zip?download][http_prdownloads.sourceforge.net_jboss_HibernateTools-3.2.0.beta6a.zip_download]

下载完了以后解压缩HibernateTools-3.2.0.beta6a/plugins/org.hibernate.eclipse\_3.2.0.beta6a/lib/tools

里找到hibernate-tools.jar 放到你的工程的lib里

目录结构

![None.gif][]  .  
![None.gif][]    +src  
![None.gif][]        +  your package  
![None.gif][]            \*.java  
![None.gif][]            \*.hbm.xml  
![None.gif][]            ...  
![None.gif][]        hibernate.config.xml  
![None.gif][]        ...  
![None.gif][]    +lib  
![None.gif][]    ......  
![None.gif][]    +data  
![None.gif][]  
![None.gif][]    build.xml

把hibernate的目录里的lib里的jar  还有hibernate3.jar copy到lib里别忘了hibernate-tools.jar

注意hibernate3.jar要用HibernateTools-3.2.0.beta6a/plugins/org.hibernate.eclipse\_3.2.0.beta6a/lib/hibernate里的hibernate3.jar

还有mysql-connector-java-5.0.0-beta-bin.jar 这个连接驱动也少不了

另外还要把HibernateTools-3.2.0.beta6a/plugins/org.hibernate.eclipse\_3.2.0.beta6a/lib/tools的freemarker.jar也copy到lib里

尽管HIbernate的自动产生代码的方式有很多

比如

1 写java 代码用Xdoclet来产生hbm.xml

2 写hbm.xml来产生java代码

3 写hbm.xml来产生ddl

4 从数据库来产生hbm.xml和ddl

这里先讲解hbm2java 和 hbm2ddl

1 --hbm2java

把写好的代码\*.hbm.xml放在你的src的包里

比如这样的Customer.hbm.xml

![None.gif][] <? xml version="1.0" ?>   
![None.gif][] <! DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"  
![None.gif][]"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >   
![None.gif][]  
![None.gif][] < hibernate-mapping >   
![None.gif][]  
![None.gif][]     < class  name ="ergal.Customer"  table ="CUSTOMERS"  lazy ="false" >   
![None.gif][]         < id  name ="id"  type ="long"  column ="ID" >   
![None.gif][]             < generator  class ="increment"   />   
![None.gif][]         </ id >   
![None.gif][]      
![None.gif][]         < property  name ="name"  type ="string" >   
![None.gif][]             < column  name ="NAME"  length ="15"   />   
![None.gif][]         </ property >   
![None.gif][]         < set   
![None.gif][]             name ="orders"   
![None.gif][]            cascade ="save-update"    
![None.gif][]            inverse ="true"   
![None.gif][]             >   
![None.gif][]          
![None.gif][]             < key  column ="CUSTOMER\_ID"   />   
![None.gif][]             < one-to-many  class ="ergal.Order"   />   
![None.gif][]         </ set >      
![None.gif][]     </ class >   
![None.gif][] </ hibernate-mapping >

还有Order.xml

![None.gif][] <? xml version="1.0" ?>   
![None.gif][] <! DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"  
![None.gif][]"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >   
![None.gif][]  
![None.gif][] < hibernate-mapping >   
![None.gif][]  
![None.gif][]     < class  name ="ergal.Order"  table ="ORDERS" >   
![None.gif][]         < id  name ="id"  type ="long"  column ="ID" >   
![None.gif][]             < generator  class ="increment"   />   
![None.gif][]         </ id >   
![None.gif][]      
![None.gif][]         < property  name ="orderNumber"  type ="string" >   
![None.gif][]             < column  name ="ORDERNUMBER"  length ="15"   />   
![None.gif][]         </ property >   
![None.gif][]          
![None.gif][]         < many-to-one   
![None.gif][]             name ="customer"    
![None.gif][]            column ="CUSTOMER\_ID"   
![None.gif][]            class ="ergal.Customer"   
![None.gif][]            not-null ="true"   
![None.gif][]            cascade ="save-update"   
![None.gif][]         />   
![None.gif][]     </ class >   
![None.gif][] </ hibernate-mapping >

再然后写Hibernate的配置文件

hibernate.config.xml

![None.gif][] <? xml version='1.0' encoding='utf-8' ?>   
![None.gif][] <! DOCTYPE hibernate-configuration PUBLIC  
![None.gif][]        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"  
![None.gif][]        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" >   
![None.gif][]  
![None.gif][] < hibernate-configuration >   
![None.gif][]  
![None.gif][]     < session-factory >   
![None.gif][]  
![None.gif][]            
![None.gif][]         < property  name ="connection.driver\_class" > com.mysql.jdbc.Driver </ property >   
![None.gif][]         < property  name ="connection.url" > jdbc:mysql://localhost:3306/ahtest </ property >   
![None.gif][]         < property  name ="connection.username" > root </ property >   
![None.gif][]         < property  name ="connection.password" > \*\*\*\*\*\*\*\* </ property >   
![None.gif][]          
![None.gif][]  
![None.gif][]  
![None.gif][]             
![None.gif][]         < property  name ="hibernate.connection.provider\_class" > org.hibernate.connection.C3P0ConnectionProvider </ property >   
![None.gif][]     < property  name ="hibernate.c3p0.max\_size" > 20 </ property >   
![None.gif][]      
![None.gif][]     < property  name ="hibernate.c3p0.min\_size" > 5 </ property >   
![None.gif][]      
![None.gif][]     < property  name ="hibernate.c3p0.timeout" > 120 </ property >   
![None.gif][]      
![None.gif][]     < property  name ="hibernate.c3p0.max\_statements" > 100 </ property >   
![None.gif][]      
![None.gif][]     < property  name ="hibernate.c3p0.idle\_test\_period" > 120 </ property >   
![None.gif][]      
![None.gif][]     < property  name ="hibernate.c3p0.acquire\_increment" > 2 </ property >   
![None.gif][]  
![None.gif][]  
![None.gif][]            
![None.gif][]         < property  name ="dialect" > org.hibernate.dialect.MySQLDialect </ property >   
![None.gif][]  
![None.gif][]            
![None.gif][]         < property  name ="current\_session\_context\_class" > thread </ property >   
![None.gif][]       
![None.gif][]             
![None.gif][]         < property  name ="cache.provider\_class" > org.hibernate.cache.NoCacheProvider </ property >   
![None.gif][]      
![None.gif][]            
![None.gif][]         < property  name ="show\_sql" > true </ property >   
![None.gif][]  
![None.gif][]            
![None.gif][]         < property  name ="hbm2ddl.auto" > create </ property >   
![None.gif][]       
![None.gif][]         < mapping  resource ="ergal/Customer.hbm.xml" />   
![None.gif][]         < mapping  resource ="ergal/Order.hbm.xml" />     
![None.gif][]  
![None.gif][]     </ session-factory >   
![None.gif][]  
![None.gif][] </ hibernate-configuration >   
![None.gif][]

最后写build.xml

![None.gif][] <? xml version="1.0" encoding="GBK" ?>   
![None.gif][]  
![None.gif][] < project  name ="hibernate-tutorial"  default ="compile" >   
![None.gif][]  
![None.gif][]     < property  name ="sourcedir"  value ="$\{basedir\}/src" />   
![None.gif][]     < property  name ="targetdir"  value ="$\{basedir\}/bin" />   
![None.gif][]     < property  name ="librarydir"  value ="$\{basedir\}/lib" />   
![None.gif][]     < property  name ="schema.dir"  value ="$\{basedir\}/data" />    
![None.gif][]      
![None.gif][]     < path  id ="libraries" >   
![None.gif][]         < fileset  dir ="$\{librarydir\}" >   
![None.gif][]             < include  name ="\*.jar" />   
![None.gif][]         </ fileset >   
![None.gif][]     </ path >   
![None.gif][]     < path  id ="project.class.path" >   
![None.gif][]        
![None.gif][]         < pathelement  location ="$\{targetdir\}"   />   
![None.gif][]        
![None.gif][]         < fileset  dir ="$\{librarydir\}" >   
![None.gif][]             < include  name ="\*.jar" />   
![None.gif][]         </ fileset >   
![None.gif][]     </ path >   
![None.gif][]  
![None.gif][]     < target  name ="clean">   
![None.gif][]         < delete  dir ="$\{targetdir\}" />   
![None.gif][]         < mkdir  dir ="$\{targetdir\}" />   
![None.gif][]     </ target >   
![None.gif][]  
![None.gif][]     < target  name ="copy-resources" >   
![None.gif][]         < copy  todir ="$\{targetdir\}" >   
![None.gif][]             < fileset  dir ="$\{sourcedir\}" >   
![None.gif][]                 < exclude  name ="\*\*/\*.java" />   
![None.gif][]             </ fileset >   
![None.gif][]         </ copy >   
![None.gif][]     </ target >   
![None.gif][]  
![None.gif][]     < target  name ="compile"  depends ="clean, copy-resources" >   
![None.gif][]         < javac  srcdir ="$\{sourcedir\}"   
![None.gif][]            destdir ="$\{targetdir\}"   
![None.gif][]            classpathref ="libraries" />   
![None.gif][]     </ target >   
![None.gif][]  
![None.gif][]     < target  name ="run"  depends ="compile" >   
![None.gif][]         < java  fork ="true"  classname ="ergal.BusinessService"  classpathref ="libraries" >   
![None.gif][]             < classpath  path ="$\{targetdir\}" />   
![None.gif][]             < arg  value ="$\{action\}" />   
![None.gif][]         </ java >   
![None.gif][]     </ target >   
![None.gif][]        
![None.gif][]     < target  name ="hbm2java"  depends ="compile"   
![None.gif][]        description ="Generate Java source from the O/R mapping files" >   
![None.gif][]         < taskdef  name ="hbm2java"    
![None.gif][]            classname ="org.hibernate.tool.ant.HibernateToolTask"    
![None.gif][]            classpathref ="project.class.path" />   
![None.gif][]             < hbm2java  destdir ="$\{targetdir\}" >   
![None.gif][]                 < configuration  configurationfile ="$\{targetdir\}/hibernate.cfg.xml"   />     
![None.gif][]                 < hbm2java   jdk5 ="true" />   
![None.gif][]                     
![None.gif][]             </ hbm2java >     
![None.gif][]      
![None.gif][]     </ target >   
![None.gif][]      
![None.gif][]        
![None.gif][]     < target  name ="hbm2ddl"  depends ="compile"    
![None.gif][]            description ="Generate DB schema from the O/R mapping files" >   
![None.gif][]         < taskdef  name ="hbm2ddl"    
![None.gif][]            classname ="org.hibernate.tool.ant.HibernateToolTask"    
![None.gif][]            classpathref ="project.class.path" />   
![None.gif][]         < hbm2ddl  destdir ="$\{schema.dir\}" >   
![None.gif][]             < configuration  configurationfile ="$\{targetdir\}/hibernate.cfg.xml"   />    
![None.gif][]             < hbm2ddl  export ="true"  console ="false"  create ="true"  update ="false"  drop ="false"  outputfilename ="ahtest.sql" />    
![None.gif][]         </ hbm2ddl >      
![None.gif][]     </ target >   
![None.gif][]  
![None.gif][] </ project >

其中的 target name="hbm2java"  就是这次用来产生代码的任务

然后用cmd进入你的build.xml的根目录

运行ant hbm2java

会在你的根目录下多了一个bin文件夹里面就自动产生了一个project的源文件

包含以下代码

Customer.java

package  ergal;  
 //  Generated 2006-8-15 2:26:03 by Hibernate Tools 3.2.0.beta6a   
   
  
 import  java.util.HashSet;  
 import  java.util.Set;  
  
 /\*\*   
 \* Customer generated by hbm2java  
  \*/   
 public   class  Customer   implements  java.io.Serializable \{  
  
     //  Fields       
   
      private   long  id;  
      private  String name;  
      private  Set < Order >  orders  =   new  HashSet < Order > ( 0 );  
  
      //  Constructors   
   
     /\*\*  default constructor  \*/   
     public  Customer() \{  
    \}  
  
     /\*\*  full constructor  \*/   
     public  Customer(String name, Set < Order >  orders) \{  
        this .name  =  name;  
        this .orders  =  orders;  
    \}  
      
     
     //  Property accessors   
      public   long  getId() \{  
         return   this .id;  
    \}  
      
     public   void  setId( long  id) \{  
         this .id  =  id;  
    \}  
     public  String getName() \{  
         return   this .name;  
    \}  
      
     public   void  setName(String name) \{  
         this .name  =  name;  
    \}  
     public  Set < Order >  getOrders() \{  
         return   this .orders;  
    \}  
      
     public   void  setOrders(Set < Order >  orders) \{  
         this .orders  =  orders;  
    \}  
  
  
  
  
\}

Order.java

package  ergal;  
 //  Generated 2006-8-15 2:26:03 by Hibernate Tools 3.2.0.beta6a   
   
  
  
 /\*\*   
 \* Order generated by hbm2java  
  \*/   
 public   class  Order   implements  java.io.Serializable \{  
  
     //  Fields       
   
      private   long  id;  
      private  String orderNumber;  
      private  Customer customer;  
  
      //  Constructors   
   
     /\*\*  default constructor  \*/   
     public  Order() \{  
    \}  
  
     /\*\*  minimal constructor  \*/   
     public  Order(Customer customer) \{  
         this .customer  =  customer;  
    \}  
     /\*\*  full constructor  \*/   
     public  Order(String orderNumber, Customer customer) \{  
        this .orderNumber  =  orderNumber;  
        this .customer  =  customer;  
    \}  
      
     
     //  Property accessors   
      public   long  getId() \{  
         return   this .id;  
    \}  
      
     public   void  setId( long  id) \{  
         this .id  =  id;  
    \}  
     public  String getOrderNumber() \{  
         return   this .orderNumber;  
    \}  
      
     public   void  setOrderNumber(String orderNumber) \{  
         this .orderNumber  =  orderNumber;  
    \}  
     public  Customer getCustomer() \{  
         return   this .customer;  
    \}  
      
     public   void  setCustomer(Customer customer) \{  
         this .customer  =  customer;  
    \}  
  
  
  
  
\}

2 hbm2ddl

现在用映射文件来产生ddl和数据表

现在数据库里create database ahtest;

然后在根目录下运行

ant hbm2ddl（因为前面的build.xml里已经定义了hbm2ddl --“target name="hbm2ddl" ”）

就会在数据库的ahtest里自动建好了customers和orders两个表

还会在data文件夹下产生

ahtest.sql这个ddl文件

create table CUSTOMERS (  
    ID bigint not null,   
    NAME varchar(15),   
    primary key (ID));  
create table ORDERS (  
    ID bigint not null,   
    ORDERNUMBER varchar(15),   
    CUSTOMER\_ID bigint not null,   
    primary key (ID));  
alter table ORDERS   
    add index FK8B7256E5479EC1E3 (CUSTOMER\_ID),   
    add constraint FK8B7256E5479EC1E3 foreign key (CUSTOMER\_ID) references CUSTOMERS (ID);

这就是hbm2java和hbm2ddl这两个方便的工具的基本用法

转自：　[http://blog.csdn.net/rainytooo/archive/2006/08/15/1065118.aspx][http_blog.csdn.net_rainytooo_archive_2006_08_15_1065118.aspx]

[http_prdownloads.sourceforge.net_jboss_HibernateTools-3.2.0.beta6a.zip_download]: http://prdownloads.sourceforge.net/jboss/HibernateTools-3.2.0.beta6a.zip?download
[None.gif]: /images/20210720/3e5b1ebdcc7f473ebbb5e67e9d1a7893.png
[http_blog.csdn.net_rainytooo_archive_2006_08_15_1065118.aspx]: http://blog.csdn.net/rainytooo/archive/2006/08/15/1065118.aspx