写一个hibernate样例

xiaoxiao2021-02-28  12

1.准备pom如下:

[html]  view plain  copy <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">      <modelVersion>4.0.0</modelVersion>      <groupId>com</groupId>      <artifactId>hibernate_demo</artifactId>      <packaging>war</packaging>      <version>0.0.1-SNAPSHOT</version>      <name>hibernate_demo Maven Webapp</name>      <url>http://maven.apache.org</url>  <properties>          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>      </properties>      <dependencies>          <dependency>              <groupId>junit</groupId>              <artifactId>junit</artifactId>              <version>3.8.1</version>              <scope>test</scope>          </dependency>          <dependency>              <groupId>org.hibernate</groupId>              <artifactId>hibernate-core</artifactId>              <version>4.2.8.Final</version>          </dependency>          <!-- Hibernate uses jboss-logging for logging, for the tutorials we will               use the sl4fj-simple backend -->          <dependency>              <groupId>org.slf4j</groupId>              <artifactId>slf4j-simple</artifactId>              <version>1.6.1</version>          </dependency>          <dependency>              <groupId>mysql</groupId>              <artifactId>mysql-connector-java</artifactId>              <version>5.1.6</version>          </dependency>      </dependencies>      <build>          <finalName>hibernate_demo</finalName>      </build>  </project>  

2.创建持久化类:

[html]  view plain  copy package hibernate_demo;    public class UserModel {      private String uuid;      private int userId;      private String name;      private int age;        public String getUuid() {          return uuid;      }      public void setUuid(String uuid) {          this.uuid = uuid;      }      public int getUserId() {          return userId;      }      public void setUserId(int userId) {          this.userId = userId;      }      public String getName() {          return name;      }      public void setName(String name) {          this.name = name;      }      public int getAge() {          return age;      }      public void setAge(int age) {          this.age = age;      }        }  

3.创建cfg.xml:

[html]  view plain  copy <?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>          <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>          <property name="hibernate.connection.url">jdbc:mysql:///hibernate</property>          <property name="hibernate.connection.username">root</property>          <property name="hibernate.connection.password"></property>          <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</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_demo/UserModel.hbm.xml"/>      </session-factory>  </hibernate-configuration>  

4.创建持久化类的映射文件hbm.xml:

[html]  view plain  copy <?xml version="1.0" encoding="UTF-8"?>    <!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_demo.UserModel" table="tbl_user">          <id name="userId">              <generator class="native" />          </id>          <property name="uuid"></property>          <property name="name"></property>          <property name="age"></property>      </class>  </hibernate-mapping>  

5.创建test类:

[html]  view plain  copy package hibernate_demo;    import org.hibernate.Session;  import org.hibernate.SessionFactory;  import org.hibernate.Transaction;  import org.hibernate.cfg.Configuration;  import org.junit.After;  import org.junit.Before;  import org.junit.Test;    public class testC {        private SessionFactory sessionFactory;              @Before      public void bef()      {           sessionFactory = new Configuration().configure().buildSessionFactory();      }            @After      public void aft()      {          if (sessionFactory != null) {              sessionFactory.close();          }      }            @Test      public void testdemo() throws SecurityException, IllegalStateException               {            UserModel um = new UserModel();          um.setUuid("1");          um.setName("name1");          um.setAge(1);          Session s = sessionFactory.openSession();          Transaction t = s.beginTransaction();          s.save(um);          t.commit();                }  }  

最新的test方法:

[html]  view plain  copy package hibernate_demo;    import org.hibernate.Session;  import org.hibernate.SessionFactory;  import org.hibernate.Transaction;  import org.hibernate.cfg.Configuration;  import org.hibernate.service.ServiceRegistry;  import org.hibernate.service.ServiceRegistryBuilder;  import org.junit.After;  import org.junit.Before;  import org.junit.Test;    public class testC {        private SessionFactory sessionFactory;      private ServiceRegistry serviceRegistry;            @Before      public void bef()      {           Configuration configuration = new Configuration();            configuration.configure();            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();                    sessionFactory = configuration.buildSessionFactory(serviceRegistry);        }            @After      public void aft()      {          if (sessionFactory != null) {              sessionFactory.close();          }      }            @Test      public void testdemo() throws SecurityException, IllegalStateException               {            UserModel um = new UserModel();          um.setUuid("2");          um.setName("name2");          um.setAge(23);          Session s = sessionFactory.openSession();          Transaction t = s.beginTransaction();          s.save(um);          t.commit();                }  }  
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