2025-02-15

基於annotations配置文件實現的第一個hibernate小程序。
1.首先新建一個普通的java工程。
2.將oracle數據庫驅動包和實現hibernate的最小包導入到該工程中。
Oracle數據庫驅動包為:
Oracle 10g 10.2.0.4 JDBC_ojdbc14.jar
Hibernate的最小包為:
antlr-2.7.6.jar
commons-collections-3.1.jar
dom4j-1.6.1.jar
hibernate3.jar
javassist-3.4.GA.jar
jta-1.1.jar
slf4j-api-1.5.2.jar
slf4j-nop-1.5.2.jar
hibernate-annotations.jar
hibernate-commons-annotations.jar
ejb3-persistence.jar(這個包是hibernate基於jpa規范的實現)
 
3.在src文件夾下建一個包名為com.neusoft.bean包,在該包下建立一個名為Person.java的文件,內容如下:
 
package com.neusoft.bean;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
 
@Entity
@Table(name="person_anno")
public class Person {
       private int id;
       private String name;
 
       @Id
       public int getId() {
              return id;
       }
 
       public void setId(int id) {
              this.id = id;
       }
 
       public String getName() {
              return name;
       }
 
       public void setName(String name) {
              this.name = name;
       }
 
}
 
4.在src包下建立名為com.neusoft.test的包,然後在該包下建立名為Test.java的測試類。內容為:
 
package com.neusoft.test;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
 
import com.neusoft.bean.Person;
 
public class Test {
 
       public static void main(String[] args) {
              Person p = new Person();
              p.setId(1);
              p.setName("wjl");
 
              Configuration cfg = new AnnotationConfiguration();
              SessionFactory sf = cfg.configure().buildSessionFactory();
              Session s = sf.openSession();
              s.beginTransaction().begin();
              s.save(p);
              s.getTransaction().commit();
              s.close();
              sf.close();
 
       }
 
}
 
5.在src文件夾下建立名為hibernate.cfg.xml的hibernate的配置文件。內容如下:
 
<?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">oracle.jdbc.driver.OracleDriver</property>
        <property name="connection.url">jdbc:oracle:thin:@192.168.1.102:1521:oracle</property>
        <property name="connection.username">hr</property>
        <property name="connection.password">hr</property>
 
        <!– JDBC connection pool (use the built-in) –>
        <property name="connection.pool_size">1</property>
 
        <!– SQL dialect –>
        <property name="dialect">org.hibernate.dialect.OracleDialect</property>
 
        <!– Enable Hibernate's automatic session context management –>
        <property name="current_session_context_class">thread</property>
 
        <!– Disable the second-level cache –>
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</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 class="com.neusoft.bean.Person" />
 
    </session-factory>
 
</hibernate-configuration>
 
6.執行Test.java在控制臺中打印出如下信息:
Hibernate: insert into person_anno (name, id) values (?, ?)
7. 查看數據庫,將看到生成瞭PERSON_ANNO表,並生成瞭一條數據。
 
作者“極致書生”

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