第一个hibernate例子

来源：互联网发布：成都拓牛网络怎么样编辑：程序博客网时间：2024/05/14 07:51

1、对于hibernate要先导入jar包

antlr-2.7.6.jar

commons-collections-3.1.jar

dom4j-1.6.1.jar

hibernate-jpa-2.0-api-1.0.0.Final.jar

hibernate3.jar

javassist-3.12.0.GA.jar

jta-1.1.jar

mysql-connector-java-5.1.12-bin.jar

slf4j-api-1.6.1.jar

2、创建实体类Employee.java

package cn.incast.a_hello;import java.util.Date;public class Employee {private int empId;private String empName;private Date workDate;public int getEmpId() {return empId;}public void setEmpId(int empId) {this.empId = empId;}public String getEmpName() {return empName;}public void setEmpName(String empName) {this.empName = empName;}public Date getWorkDate() {return workDate;}public void setWorkDate(Date workDate) {this.workDate = workDate;}}

3、配置Employee.hbm.xml

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><hibernate-mapping package="cn.incast.a_hello"><!--name为实体类的名称 table为表明  --><class name="Employee" table="Employee"><!-- 主键字段 --><!-- name为实体类中的属性名 column为数据库的字段名 --><id name="empId" column="id"><!-- native为自增长 --><generator class="native"></generator></id><!-- 其他字段 --><property name="empName" column="empName"></property><property name="workDate" column="workDate"></property></class></hibernate-mapping>

4、配置hibernate.cfg.xml

<!DOCTYPE hibernate-configuration PUBLIC"-//Hibernate/Hibernate Configuration DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration><session-factory><property name="show_sql">true</property><!-- 数据库连接配置 --><property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property><property name="hibernate.connection.url">jdbc:mysql:///employee</property><property name="hibernate.connection.username">root</property><property name="hibernate.connection.password">123456</property><property name="dialect">org.hibernate.dialect.MySQL5Dialect</property><!-- 其他相关配置 --><!-- 显示hibernate在运行时执行的sql语句 --><property name="hibernate.show_sql">true</property><!-- 格式化sql --><property name="hibernate.format_sql">true</property><!-- 自动建表 --><property name="hibernate.hbm2ddl.auto">update</property><!-- 加载所有映射 --><mapping resource="cn/incast/a_hello/Employee.hbm.xml"/></session-factory></hibernate-configuration>

4、创建App类进行进行测试

package cn.incast.a_hello;import java.util.Date;import javax.transaction.HeuristicMixedException;import javax.transaction.HeuristicRollbackException;import javax.transaction.RollbackException;import javax.transaction.SystemException;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.hibernate.classic.Session;public class App {public static void main(String[] args) throws Exception {//创建对象Employee emp=new Employee();emp.setEmpId(1);emp.setEmpName("李四");emp.setWorkDate(new Date());//获取加载配置文件的管理类对象Configuration config=new Configuration();config.configure();//默认加载src/hibernate.cfg.xml文件//创建session的工厂对象SessionFactory sf=config.buildSessionFactory();//创建session（代表一个回话，与数据库连接的回话）Session session=sf.openSession();//开启事物Transaction ts=session.beginTransaction();session.update(emp);//提交事物ts.commit();session.close();}}

5、控制台输出

阅读全文

0 0