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简单的手工hibernate程序示例

2017年12月12日  | 移动技术网IT编程  | 我要评论

本文讲述了简单的手工hibernate程序示例。分享给大家供大家参考。具体如下：

今天学习了下hibernate，写了个小的手工程序，总结下，

首先创建数据库表：

复制代码 代码如下:
create table increment_testr(id bigint not null, name char(10), primary key(id));

eclipse下，新建工程。

新建数据库表的映射，这里使用手工方式完成：

incrementtester.java

public class incrementtester {
  private long id;
  private string name;
  public incrementtester(){}
  public incrementtester(string name){
    this.name = name;
  }
  public long getid(){
    return this.id;
  }
  private void setid(long id){
    this.id = id;
  }
  public string getname(){
    return this.name;
  }
  public void setname(string name){
    this.name = name;
  }
}

对应编写映射xml文件

incrementtester.hbm.xml

public "-//hibernate/hibernate mapping dtd 3.0//en"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
private

实现具体功能的类bussinessservice

import java.lang.reflect.*;
import org.hibernate.*;
import org.hibernate.cfg.*;
import java.io.*;
import java.sql.*;
import java.util.*;
public class bussinessservice {
  public static sessionfactory sessionfactory;
  static{
    try{
      configuration config = new configuration().configure();
      sessionfactory = config.buildsessionfactory();
    }catch(exception e){
      e.printstacktrace();
    }
  }
  public void findallobjects(string classname){
    session session = sessionfactory.opensession();
    transaction tx = null;
    try{
      tx = session.begintransaction();
      list objects = session.createquery("from "+classname).list();
      for(iterator it = objects.iterator();it.hasnext();){
        long id = new long(0);
        incrementtester xx = (incrementtester)it.next();
        id=xx.getid();
        system.out.println("id of "+classname+":"+id+" name: "+xx.getname());
      }
      tx.commit();
    }catch(exception e){
      e.printstacktrace();
    }finally{
      session.close();
    }
  }
  public void saveobject(object object){
    session session = sessionfactory.opensession();
    transaction tx = null;
    try{
      tx = session.begintransaction();
      session.save(object);
      tx.commit();
    }catch(exception e){
      e.printstacktrace();
      if(tx != null){
        tx.rollback();
      }
    }finally{
      session.close();
    }
  }
  public void deleteallobject(string classname){
    session session = sessionfactory.opensession();
    transaction tx = null;
    try{
      tx = session.begintransaction();
      query query=session.createquery("delete from "+classname);
      query.executeupdate();
      tx.commit();
    }catch(exception e){
      e.printstacktrace();
      if(tx!=null){
        tx.rollback();
      }
    }finally{
      session.close();
    }
  }
}

实现主函数：

public class test {
  /**
   * @param args
   */
  public static void main(string[] args) {
    // todo auto-generated method stub
    string name="incrementtester";
    bussinessservice aa = new bussinessservice();
    aa.deleteallobject(name);
    object o1 = null;
    try {
      o1 = class.forname(name).newinstance();
      ((incrementtester)o1).setname("caijie");
      aa.saveobject(o1);
      o1 = class.forname(name).newinstance();
      ((incrementtester)o1).setname("gufeng");
      aa.saveobject(o1);
    } catch (exception e) {
      e.printstacktrace();
    }
    aa.findallobjects(name);
  }
}

hibernate配置文件：hibernate.cfg.xml
 
public "-//hibernate/hibernate configuration dtd//en"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
org.hibernate.dialect.mysqldialect
com.mysql.jdbc.driver
jdbc:mysql://localhost:3306/test
root
root
true

增加相应的库，运行后成功得到结果：

hibernate: delete from increment_testr
hibernate: select max(id) from increment_testr
hibernate: insert into increment_testr (name, id) values (?, ?)
hibernate: insert into increment_testr (name, id) values (?, ?)
hibernate: select incrementt0_.id as id0_, incrementt0_.name as name0_ from increment_testr incrementt0_
id of incrementtester:1 name: caijie
id of incrementtester:2 name: gufeng

希望本文所述对大家的jsp程序设计有所帮助。

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