简单的手工hibernate程序示例
编程学习 2021-07-05 11:23www.dzhlxh.cn编程入门
这篇文章主要介绍了简单的手工hibernate程序示例,以实例形式分析了简单hibernate程序的实现技巧,具有一定参考借鉴价值,需要的朋友可以参考下
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：
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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