maven+Hibernate+mysql环境搭建

Posted 2020-10-30 o_0

项目结构图如下

 

一，首先是添加依赖pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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>
  <packaging>war</packaging>

  <name>Hibernate</name>
  <groupId>com.cyf</groupId>
  <artifactId>Hibernate</artifactId>
  <version>1.0-SNAPSHOT</version>

  <build>
    <plugins>
      <plugin>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>maven-jetty-plugin</artifactId>
        <version>6.1.7</version>
        <configuration>
          <connectors>
            <connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">
              <port>8888</port>
              <maxIdleTime>30000</maxIdleTime>
            </connector>
          </connectors>
          <webAppSourceDirectory>${project.build.directory}/${pom.artifactId}-${pom.version}</webAppSourceDirectory>
          <contextPath>/</contextPath>
        </configuration>
      </plugin>
    </plugins>
    <!--把xml文件也编译-->
  <resources>
    <resource>
      <directory>src/main/java</directory>
      <includes>
        <include>**/*.xml</include>
      </includes>
    </resource>
    <resource>
      <directory>src/main/resources</directory>
      <includes>
        <include>**/*.xml</include>
      </includes>
    </resource>
  </resources>
  </build>

    <!-- 属性配置 -->
    <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
      <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <scope>test</scope>
      </dependency>

      <!-- 添加Hibernate依赖 -->
      <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>3.6.5.Final</version>
      </dependency>

      <!-- 添加Log4J依赖 -->
      <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>1.2.16</version>
      </dependency>

      <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.6.1</version>
      </dependency>

      <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-nop</artifactId>
        <version>1.6.4</version>
      </dependency>

      <!-- 添加javassist -->
      <dependency>
        <groupId>javassist</groupId>
        <artifactId>javassist</artifactId>
        <version>3.11.0.GA</version>
      </dependency>
      <dependency>
        <groupId>org.junit.jupiter</groupId>
        <artifactId>junit-jupiter-api</artifactId>
        <version>RELEASE</version>
      </dependency>
      <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
      </dependency>
      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.0.8</version>
      </dependency>
    </dependencies>

</project>

 

二，hibernate.cfg.xml

<?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>
        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/test</property>
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>
        <!--显示生成的sql语句-->
        <property name="show_sql">true</property>
        <property name="format_sql">true</property>
        <!-- 禁用了javaEE6的bean-validate -->
        <property name="javax.persistence.validation.mode">none</property>
        <property name="dialect">org.hibernate.dialect.SQLServerDialect</property>
        <!-- 即可通过getCurrentSession 获取线程唯一的session -->
        <property name="current_session_context_class">thread</property>

        <!--在数据库中自动创建表-->
        <!--<property name="hbm2ddl.auto">update</property>-->
        <!-- 指定ddl的生成方式 -->
        <!--<property name="hibernate.hbm2ddl.auto">create</property>-->

        <mapping resource="com/deppon/test03/entity/PersonEntity.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

三，PersonEntity.hbm.xml

<?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 package="com.deppon.test03.entity">
    <class name="PersonEntity" table="t_person">
        <id name="id" column="id" type="int">
            <generator class="native"/>
        </id>
     <property name="name" type="string" column="name"/>
    </class>
</hibernate-mapping>

四，PersonEntity.java

package com.deppon.test03.entity;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "t_person")
public class PersonEntity implements java.io.Serializable {
    private static final long serialVersionUID = -4376187124011546736L;

    private Integer id;
    private String name;

    @Id
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @Column(length = 50 , nullable = false , unique = true)
    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "PersonEntity [id=" + id + ", name=" + name + "]";
    }

}

五，HibernateUtil.java

package com.deppon.test03.util;

import org.apache.log4j.Logger;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
    /** ThreadLocal Session Map */
    public static final ThreadLocal<Session> SESSIONMAP = new ThreadLocal<Session>();
    private static final SessionFactory sessionFactory;
    private static final Logger LOGGER = Logger.getLogger(HibernateUtil.class);

    static {
        try {
            LOGGER.debug("HibernateUti.static - loading cofig");
            sessionFactory = new Configuration().configure("hibernate.cfg.xml")
                    .buildSessionFactory();
            LOGGER.debug("HibernateUtil.static - end");
        } catch (Throwable ex) {
            ex.printStackTrace();
            LOGGER.error("HibernateUti error : ExceptionInInitializerError");
            throw new ExceptionInInitializerError(ex);
        }
    }

    private HibernateUtil() {

    }

    public static Session getSession() throws HibernateException {
        Session session = SESSIONMAP.get();

        if(session == null) {
            session = sessionFactory.openSession();
            SESSIONMAP.set(session);
        }

        return session;
    }

    public static void closeSession() throws HibernateException {
        Session session = SESSIONMAP.get();
        SESSIONMAP.set(null);

        if(session != null) {
            session.close();
        }
    }

}

六，ModelTest.java

package com.deppon.test03.model;


import java.util.List;

import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.junit.Assert;
import org.junit.Test;

import com.deppon.test03.entity.PersonEntity;
import com.deppon.test03.util.HibernateUtil;

public class ModelTest {

    @Test
    public void testGetSession() {
        Session session = HibernateUtil.getSession();

        Assert.assertNotNull(session);

        HibernateUtil.closeSession();
    }

    @Test
    public void testExport() {
        new SchemaExport(new Configuration().configure()).create(true , true);
    }

    @Test
    public void testSave() {
        PersonEntity person = new PersonEntity();
//        person.setId(2);
        person.setName("ccc");

        Session session = HibernateUtil.getSession();
        Transaction tx = session.beginTransaction();

        session.save(person);

        tx.commit();
        HibernateUtil.closeSession();
    }

    @Test
    public void testQuery() {
        Session session = HibernateUtil.getSession();
        session.beginTransaction();

        @SuppressWarnings("unchecked")
        List<PersonEntity> personList = session.createQuery("select p from PersonEntity p").list();

        for(PersonEntity eachPerson : personList) {
            System.out.println(eachPerson);
        }

        session.getTransaction().commit();
        HibernateUtil.closeSession();
    }

}

七，sql语句

/*
Navicat MySQL Data Transfer

Source Server         : test
Source Server Version : 50717
Source Host           : localhost:3306
Source Database       : test

Target Server Type    : MYSQL
Target Server Version : 50717
File Encoding         : 65001

Date: 2018-04-07 19:54:35
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for `t_person`
-- ----------------------------
DROP TABLE IF EXISTS `t_person`;
CREATE TABLE `t_person` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC;