hibernate hello world

文件:	hibernate_helloworld.rar
大小:	1KB
下载:	下载

使用oracle自动安装的scott/tiger的DEPT表，程序查询并显示所有dept信息

1：编写以下文件
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hibernate.cfg.xml         配置文件,指定oracle实例 驱动 用户名 密码等
hello
 |--Dept.java             DEPT表对应的类文件
 |--HelloWorld.java       主程序
 |--HelloWorld.hbm.xml    映射文件

Dept.java
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package hello;

public class Dept {
    private Long deptno;
    private String dname;
    private String loc;
   
    public Dept(){}
   
    public Long getDeptno() {
        return deptno;
    }

    private void setDeptno(Long deptno) {
        this.deptno = deptno;
    }
   
    public String getDname() {
        return dname;
    }
   
    public void setDname(String dname) {
        this.dname = dname;
    }
   
    public String getLoc() {
        return loc;
    }
   
    public void setLoc(String loc) {
        this.loc = loc;
    }
}

HelloWorld.java
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package hello;

import java.util.*;
import org.hibernate.*;
import org.hibernate.cfg.*;

public class HelloWorld
{
    public static void main(String args[])
    {
        Configuration config = new Configuration().configure();
        SessionFactory sessions = config.buildSessionFactory();
        Session session = sessions.openSession();
        Transaction transaction = session.beginTransaction();
       
        // 这里的Dept是映射文件中的name属性，而不是table属性dept（会报错）
        List depts = session.createQuery("from Dept").list();
       
        System.out.println(depts.size() + "dept(s) found");
       
        System.out.println("deptno dname loc");
        for(Iterator iter = depts.iterator(); iter.hasNext();) {
            Dept dept = (Dept)iter.next();
            System.out.println(dept.getDeptno() + dept.getDname() + dept.getLoc());
        }
       
        transaction.commit();
        session.close();
        sessions.close();
    }
}

HelloWorld.hbm.xml
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        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "">

   
       
           
       
       
       
   

hibernate.cfg.xml
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   "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
   "">

   
        oracle.jdbc.OracleDriver
        jdbc:oracle:thin:scott/tiger@localhost:1521:SERVICE_NAME
        scott
        tiger
        org.hibernate.dialect.OracleDialect
        False
       
       
   

2：设置CLASSPATH环境变量
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set CLASSPATH=%CLASSPATH%;C:\software\oracle\jdbc\lib\ojdbc14.jar;F:\开源\代码\hibernate3.3.2\hibernate3.jar;F:\开源\代码\hibernate3.3.2\lib\required\antlr-2.7.6.jar;F:\开源\代码\hibernate3.3.2\lib\required\commons-collections-3.1.jar;F:\开源\代码\hibernate3.3.2\lib\required\dom4j-1.6.1.jar;F:\开源\代码\hibernate3.3.2\lib\required\javassist-3.9.0.GA.jar;F:\开源\代码\hibernate3.3.2\lib\required\jta-1.1.jar;F:\开源\代码\hibernate3.3.2\lib\required\slf4j-api-1.5.8.jar;F:\开源\代码\hibernate3.3.2\lib\required\slf4j-nop-1.5.2.jar
增加了以下三种jar文件
a) hibernate安装目录下lib\required下的所有jar文件
b) oracle的jdbc jar包
c) slf4j-nop-1.5.2.jar    这个安装包中没有，但是必须否则报错
        SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
        SLF4J: See for further details.
        Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/impl/StaticLoggerBinder

3：编译
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javac hello/Dept.java
javac hello/HelloWorld.java

4：运行
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java hello.HelloWorld

输出
4dept(s) found
deptno dname loc
10ACCOUNTINGNEW YORK
20RESEARCHDALLAS
30SALESCHICAGO
40OPERATIONSBOSTON