hibernate之helloword(环境搭建)

　　<?xml version="1.0" encoding="UTF-8"?>　　　　<!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="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property><property name="hibernate.connection.url">jdbc:mysql:///web_shop</property><property name="hibernate.connection.username">root</property><property name="hibernate.connection.password">123</property><!-- 设置连接提供者 --><property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property><!-- c3p0连接池的配置 --><property name="hibernate.c3p0.max_size">20</property> <!-- 最大连接池 --><property name="hibernate.c3p0.min_size">5</property> <!-- 最小连接数 --><property name="hibernate.c3p0.timeout">120</property> <!-- 超时 --><property name="hibernate.c3p0.idle_test_period">3000</property> <!-- 空闲连接 --><!-- 可以将向数据库发送的sql显示出来 --><property name="hibernate.show_sql">true</property><!-- 格式化sql --><property name="hibernate.format_sql">true</property><!-- hibernate的方言 --><property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property><!-- 自动创建表 --><!-- <property name="hibernate.hbm2ddl.auto">update</property> --><!-- 用于设置事务提交方式 --><property name="hibernate.connection.autocommit">false</property><!-- 配置hibernate的映射文件所在位置 --><mapping resource="com/baidu/domain/User.hbm.xml"/></session-factory></hibernate-configuration>

public class User {private String uid;private String username;private String password;private String name;private String email;private String telephone;private Date birthday;private String sex;private Integer state;private String code;public User() {super();}public User(String username, String password) {super();this.username = username;this.password = password;}public User(String uid, String username, String password, String name,String email, String telephone, Date birthday, String sex,Integer state, String code) {super();this.uid = uid;this.username = username;this.password = password;this.name = name;this.email = email;this.telephone = telephone;this.birthday = birthday;this.sex = sex;this.state = state;this.code = code;}public String getUid() {return uid;}public void setUid(String uid) {this.uid = uid;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getTelephone() {return telephone;}public void setTelephone(String telephone) {this.telephone = telephone;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public String getSex() {return sex;}public void setSex(String sex) {this.sex = sex;}public Integer getState() {return state;}public void setState(Integer state) {this.state = state;}public String getCode() {return code;}public void setCode(String code) {this.code = code;}@Overridepublic String toString() {return "User [uid=" + uid + ", username=" + username + ", password="+ password + ", name=" + name + ", email=" + email+ ", telephone=" + telephone + ", birthday=" + birthday+ ", sex=" + sex + ", state=" + state + ", code=" + code + "]";}}

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC ????"-//Hibernate/Hibernate Mapping DTD 3.0//EN" ???"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> ???<hibernate-mapping> ???<!--name表示类的全路径名 ?table表名 catalog表示数据库名 --> ???<class name="com.baidu.domain.User" table="user" catalog="web_shop"> ???<!-- 表示主键 --> ???<id name="uid" column="uid"> ???<!-- <generator class="native"></generator> --> ???</id> ???<property name="username" column="username" length="20"></property> ???<property name="password" column="password" length="20"></property> ???<property name="name" column="name" length="20"></property> ???<property name="email" column="email" length="20"></property> ???<property name="telephone" column="telephone" length="20"></property> ???<property name="birthday" column="birthday" ?></property> ???<property name="sex" column="sex" length="10"></property> ???<property name="state" column="state" length="11"></property> ???<property name="code" column="code" length="64"></property> ???</class> ???</hibernate-mapping>

public class HibernateUtils {private static SessionFactory sessionFactory=null;static{//获取config ?加载配置文件Configuration configure = new Configuration().configure();sessionFactory = configure.buildSessionFactory();}//获取sessionpublic static Session getSession(){Session session = sessionFactory.openSession();return session;}}

　　　　　　　　　　@Test //删除方法public void test1(){// 创建一个User对象//保证每个用户去出来的session都不相同User user = new User();user.setUid("1234");Session session = HibernateUtils.getSession(); // 相当于得到一个Connection。// 开启事务Transaction transaction = session.beginTransaction();// 操作//删除时必须根据主键进行删除session.delete(user);// 事务提交transaction.commit();//不需要关闭Configuration ?因为Configuration不是轻量级的。这样一个项目就只产生一个Configuration//configuration相当于连接池session.close();}