• 玩转Web之SSH--Heibernate (一)---第一个demo


    最近在学heibernate,是看马士兵老师的视频学的,在这里总结一下,做点笔记。关于heibernate的优点,大家可以在网上

    百度,这里不做赘述,直接讲怎么使用heibernate


    步骤一:新建项目,导入jar包

        在这里讲一种新的导入jar包的方法,首先在myEclipse中点击windows>>preferences>>java>>Buid Path>>User Libraries  在右侧点击New ,在打开的窗口中输入"hibernate",点击OK,选择hibernate,点击Add jars,导入所需的jar包,我这里导入的比较多,大家按实际情况导入,然后点击OK;

       新建一个java项目,右键BuidPath>>Add Libraries>>User Library 选择hibernate,点击OK,这样就导入hibernate的包了。

       接下来还要导入数据库驱动包,根据大家所用数据库的种类自行导入即可


    步骤二:新建数据库/数据表

         我用的是sqlserver2008,这里贴出我的代码:

    CREATE TABLE STUDENT
    (
    STUID INT PRIMARY KEY,
    STUNAME VARCHAR(10),
    STUSEX VARCHAR(5),
    STUGRADE VARCHAR(10),
    );
    需要注意的是一定要设置主键,这关系到后面配置文件去连接数据表


    步骤三:写javabean

    在项目下建包hibernate,建类Student

    package hibernate;
    
    public class Student {
    	private int stuId;
    	private String stuName;
    	private String stuSex;
    	private String stuGrade;
    	public int getStuId() {
    		return stuId;
    	}
    	public void setStuId(int stuId) {
    		this.stuId = stuId;
    	}
    	public String getStuName() {
    		return stuName;
    	}
    	public void setStuName(String stuName) {
    		this.stuName = stuName;
    	}
    	public String getStuSex() {
    		return stuSex;
    	}
    	public void setStuSex(String stuSex) {
    		this.stuSex = stuSex;
    	}
    	public String getStuGrade() {
    		return stuGrade;
    	}
    	public void setStuGrade(String stuGrade) {
    		this.stuGrade = stuGrade;
    	}
    
    }
    

    步骤四:写Student.hbm.xml配置文件

        ,右键包 hibernate,点击new >>file>>输入Student.hbm.xml,点击OK,下面是我配置文件中的代码:

    <?xml version="1.0"?>
    <!DOCTYPE hibernate-mapping PUBLIC
            "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
            "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
    
    <hibernate-mapping>
    <class name="hibernate.Student">    
            <id name="stuId"></id>    
            <property name="stuName"/>    
            <property name="stuSex"/>    
            <property name="stuGrade"/>    
        </class>    
    
    </hibernate-mapping>
    
    <class name="hibernate.Student">     name为javabean的路径

    <id name="stuId"></id>   id中name的值对应主键

    步骤五:hibernate.cfg.xml

        右键项目,new>>file>>输入hibernate.cfg.xml,文件内容如下:

    <?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>
    
            <!-- Database connection settings -->
            <property name="connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
            <property name="connection.url">jdbc:sqlserver://localhost:1433;DatabaseName=Study</property>
            <property name="connection.username">sa</property>
            <property name="connection.password">aaaaaa</property>
    
            <!-- JDBC connection pool (use the built-in) -->
           <!--  <property name="connection.pool_size">1</property> -->
    
            <!-- SQL dialect -->
            <property name="dialect">org.hibernate.dialect.HSQLDialect</property>
    
            <!-- Echo all executed SQL to stdout -->
             <property name="show_sql">true</property> 
    
            <!-- Drop and re-create the database schema on startup -->
            <property name="hbm2ddl.auto">create</property>
    
            <mapping resource="hibernate/Student.hbm.xml"/>
    
        </session-factory>
    
    </hibernate-configuration>
    

    对应文件修改driver,url,username,password等等


    最后一步:测试类

       新建一个包Test,新建类StudentTest:

    package test;
    
    import org.hibernate.Session;
    import org.hibernate.SessionFactory;
    import org.hibernate.cfg.Configuration;
    
    import hibernate.Student;
    
    public class StudentTest {
    
    	public static void main(String[] args) {
    		Student s=new Student();
    		s.setStuId(111);
    		s.setStuName("张三");
    		s.setStuSex("男");
    		s.setStuGrade("大二");
    		Configuration cfg=new Configuration().configure();
    		SessionFactory sf=cfg.buildSessionFactory();
    		Session session=sf.openSession();
    		session.beginTransaction();
    		session.save(s);
    		session.getTransaction().commit();
    		session.close();
    		sf.close();
    	}
    }
    

    然后运行就可以啦,这样不需要sql语句就可以将数据插入数据表中


    版权声明:本文为博主原创文章,未经博主允许不得转载。

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  • 原文地址:https://www.cnblogs.com/dingxiaoyue/p/4931818.html
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