Java学习之道：纯Hibernate使用-不用spring事务管理

最近一直在做系统测试，检验功能，测试bug。发现一直都是用spring来管理配置hibernate依赖注入，来管理Hibernate事务。但是有的程序需要手动Main函数启动，而采用spring加载的话，就会触发很多类，影响性能，还有当spring里面写了触发器后，那么随着你的main函数运行，你的触发器也得到了启动，那么这个会造成多个进程开启了触发器。

当离开了spring管理时，发现Hibernate居然不知道怎么调用了，参考了网上一些大牛的文章，自己动手实现了，无需spring管理来进行Hibernate调用。

直接上代码：1.工具类，2.xml配置文件，3.实体类，注释方式 4.测试功能类

Hibernateutil .java代码


package com.t.common.hibernate;

import java.io.Serializable;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.cfg.Configuration;

public final class HibernateUtil {

private static SessionFactory sessionFactory;

private static ThreadLocal session = new ThreadLocal();

public HibernateUtil(){

}

static {

Configuration cfg = new Configuration();

cfg.configure("hibernate.common.xml");

sessionFactory = cfg.buildSessionFactory();

}

public static Session getThreadLocalSession(){

Session s = (Session) session.get();

if(s==null){

s=getSession();

session.set(s);

}

return s;

}

public static void closeSession(){

Session s = (Session)session.get();

if(s!=null){

s.close();

session.set(null);

}

}

public static SessionFactory getSessionFactory(){

return sessionFactory;

}

public static Session getSession(){

return sessionFactory.openSession();

}

//增删改查

//当需要事务一致性的时候，需要回滚，比如商品系统

/*

* public static void add(Object entity){

Session s =null;

Transaction tx = null;

try {

s = HibernateUtil.getSession();

tx = s.beginTransaction();

s.save(entity);

tx.commit();

} catch (HibernateException e) {

if(tx != null){

tx.rollback();

}

throw e;

}finally {

if(s!=null){

s.close();

}

}

}

*/

public static void add(Object entity){

Session s =null;

Transaction tx = null;

try {

s = HibernateUtil.getSession();

tx = s.beginTransaction();

s.save(entity);

tx.commit();

} finally {

if(s!=null){

s.close();

}

}

}

public static void delete(Object entity){

Session s =null;

Transaction tx = null;

try {

s = HibernateUtil.getSession();

tx = s.beginTransaction();

s.delete(entity);

tx.commit();

} finally {

if(s!=null){

s.close();

}

}

}

public static Object get(Class clazz, Serializable id){

Session s =null;

try {

s = HibernateUtil.getSession();

Object obj = s.get(clazz, id);

return obj;

} finally {

if(s!=null){

s.close();

}

}

}

}

Hibernate.common.xml代码


<?xml version="1.0" encoding="utf-8"?>

<!DOCTYPE hibernate-configuration PUBLIC

"-//Hibernate/Hibernate Configuration DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>

<property name="hibernate.bytecode.use_reflection_optimizer">

false

</property>

<property name="hibernate.connection.driver_class">

oracle.jdbc.driver.OracleDriver

</property>

<property name="connection.url">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property>

<property name="connection.username">baike</property>

<property name="connection.password">baike</property>

<property name="hibernate.dialect">

org.hibernate.dialect.Oracle10gDialect

</property>

<property name="hibernate.search.autoregister_listeners">

false

</property>

<property name="hibernate.show_sql">true</property>

<!-- 映射类 -->

<mapping class="com.t.common.hibernate.BaikeUser"/>

</session-factory>

</hibernate-configuration>

Baikeuser .java代码


package com.t.common.hibernate;

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.SequenceGenerator;

import javax.persistence.Table;

@Entity

@Table(name="T_USER")

public class BaikeUser {

private Long id ;

private String username;

private String password;

@Id

@SequenceGenerator(name="generator",allocationSize=1,initialValue=1,sequenceName="SEQ_USER_ID")

@GeneratedValue(strategy=GenerationType.SEQUENCE,generator="generator")

@Column(name="ID")

public Long getId() {

return id;

}

@Column(name="username")

public String getUsername() {

return username;

}

@Column(name="password")

public String getPassword() {

return password;

}

public void setId(Long id) {

this.id = id;

}

public void setUsername(String username) {

this.username = username;

}

public void setPassword(String password) {

this.password = password;

}

}

Testuser.java代码


package com.t.common.hibernate;

public class TestUSer {

public static void main(String[] args) {

BaikeUser user = new BaikeUser();

user.setId(1L);

user.setUsername("cjp1989");

user.setPassword("12345");

HibernateUtil.add(user);

}

}

1.注意事项：xml配置文件可以自定义的，但是<session-factory> 单独使用时，没有name属性