简单的手工hibernate程序示例

Shun

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：

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"
"https://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"
"https://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。