【Spring 数据访问终篇】Spring + Hibernate + Mysql

说来惭愧，数月没有更新博客，今天带来spring访问数据的最终篇，spring + hibernate。

本篇文章将用maven创建一个简答的java项目，并结合spring框架中的hibernate对数据进行增删改查的操作，数据库为mysql。

1.项目最终的目录结构



2.在数据库中创建如下一个名为stock的表，sql语法如下：

CREATE TABLE stock ( STOCK_ID int(10) unsigned NOT NULL AUTO_INCREMENT, STOCK_NAME varchar(10) NOT NULL, STOCK_CODE varchar(10) NOT NULL, PRIMARY KEY(STOCK_ID) USING BTREE, UNIQUE KEY UNI_STOCK_NAME (STOCK_NAME), UNIQUE KEY UNI_STOCK_ID (STOCK_CODE) USING BTREE) ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8;

3.pom.xml文件依赖

<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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>org.thinkingingis</groupId>
<artifactId>SpringHibernateMysql</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Spring Hibernate Mysql</name>
<description>Spring Hibernate Mysql</description>

<dependencies>

<!-- https://mvnrepository.com/artifact/org.springframework/spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
<version>2.5.6.SEC03</version>
</dependency>

<!-- https://mvnrepository.com/artifact/cglib/cglib -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.2.5</version>
</dependency>

<!-- mysql驱动包 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.29</version>
</dependency>

<!-- Hibernate framework -->

<!-- https://mvnrepository.com/artifact/org.springframework/spring-hibernate3 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-hibernate3</artifactId>
<version>2.0.8</version>
</dependency>

<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>

<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.3</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-collections4 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.1</version>
</dependency>

<dependency>
<groupId>antlr</groupId>
<artifactId>antlr</artifactId>
<version>2.7.7</version>
</dependency>

</dependencies>

</project>

4.实体类 与 dao层

Stock 类与数据库中stock表建立对应关系

package org.thinkingingis.stock.model;

import java.io.Serializable;

public class Stock implements Serializable {

public static final long serialVersionUID = 1L;

private Long stockId;
private String stockCode;
private String stockName;

public Long getStockId() {
return stockId;
}
public void setStockId(Long stockId) {
this.stockId = stockId;
}
public String getStockCode() {
return stockCode;
}
public void setStockCode(String stockCode) {
this.stockCode = stockCode;
}
public String getStockName() {
return stockName;
}
public void setStockName(String stockName) {
this.stockName = stockName;
}
}

Stock 业务层的接口与实现 这一层也可以不要，只保留后面的dao层

package org.thinkingingis.stock.bo;

import org.thinkingingis.stock.model.Stock;

public interface StockBo {
void save(Stock stock);
void update(Stock stock);
void delete(Stock stock);

Stock findByStockCode(String stockCode);

}

package org.thinkingingis.stock.bo.impl;

import org.thinkingingis.stock.bo.StockBo;
import org.thinkingingis.stock.dao.StockDao;
import org.thinkingingis.stock.model.Stock;

public class StockBoImpl implements StockBo{

StockDao stockDao;

public void setStockDao(StockDao stockDao){
this.stockDao = stockDao;
}

public void save(Stock stock) {
stockDao.save(stock);
}

public void update(Stock stock) {
stockDao.update(stock);
}

public void delete(Stock stock) {
stockDao.delete(stock);
}

public Stock findByStockCode(String stockCode) {
return stockDao.findByStockCode(stockCode);
}

}

DAO层是数据库访问层，在本类中完成对数据库的访问，该类继承了HibernateDaoSupport，通过getHibernateTemplate()

package org.thinkingingis.stock.dao;

import org.thinkingingis.stock.model.Stock;

public interface StockDao {

void save(Stock stock);
void update(Stock stock);
void delete(Stock stock);
Stock findByStockCode(String stockCode);

}

package org.thinkingingis.stock.dao.impl;

import java.util.List;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.thinkingingis.stock.dao.StockDao;
import org.thinkingingis.stock.model.Stock;

public class StockDaoImpl extends HibernateDaoSupport implements StockDao {

public void save(Stock stock) {
getHibernateTemplate().save(stock);
}

public void update(Stock stock) {
getHibernateTemplate().update(stock);
}

public void delete(Stock stock) {
getHibernateTemplate().delete(stock);

}

public Stock findByStockCode(String stockCode) {
List list = getHibernateTemplate().find("from Stock where stockCode = ?", stockCode);
return (Stock)list.get(0);
}

}

5.配置相应的资源

首先配置Hibernate的 mapping 文件 Stock.hbm.xml 

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
<class name="org.thinkingingis.stock.model.Stock" table="stock">
<id name="stockId" type="java.lang.Long">
<column name="STOCK_ID" />
<generator class="identity" />
</id>
<property name="stockCode" type="string">
<column name="STOCK_CODE" length="10" not-null="true" unique="true" />
</property>
<property name="stockName" type="string">
<column name="STOCK_NAME" length="10" not-null="true" unique="true" />
</property>
</class>
</hibernate-mapping>

数据库相关文件 database.properties

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springmvcjdbc
jdbc.username=root
jdbc.password=123456

数据源文件DataSource.xml，本文件指定了database.properties中的内容

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>properties/database.properties</value>
</property>
</bean>

<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>

</beans>

Hibernate 相关的配置文件 Hibernate.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 
<!-- Hibernate session factory -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

<property name="dataSource">
<ref bean="dataSource"/>
</property>

<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>

<property name="mappingResources">
<list>
<value>/hibernate/Stock.hbm.xml</value>
</list>
</property>

</bean>
</beans>

Spring bean的配置文件 Stock.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 
<!-- Stock business object -->
<bean id="stockBo" class="org.thinkingingis.stock.bo.impl.StockBoImpl" >
<property name="stockDao" ref="stockDao" />
</bean>

<!-- Stock Data Access Object -->
<bean id="stockDao" class="org.thinkingingis.stock.dao.impl.StockDaoImpl" >
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>

</beans>

接下来需要导入spring bean 的配置文件BeanLocations.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd"> 
<!-- Database Configuration -->
<import resource="../database/DataSource.xml"/>
<import resource="../database/Hibernate.xml"/>

<!-- Beans Declaration -->
<import resource="../beans/Stock.xml"/>

</beans>

（有没有已经被各种xml文件搞得迷糊了呢，哈哈，为以后spring boot 铺垫一记）

6.运行

当配置完上述步骤以后 就可以运行了

package org.thinkingingis.common;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.thinkingingis.stock.bo.StockBo;
import org.thinkingingis.stock.model.Stock;

public class App {

public static void main(String[] args){

ApplicationContext context = new ClassPathXmlApplicationContext("spring/config/BeanLocations.xml");

StockBo stockBo = (StockBo)context.getBean("stockBo");

/** insert **/
Stock stock = new Stock();
stock.setStockCode("011");
stock.setStockName("GIS");
stockBo.save(stock);

/** select**/
Stock stock2 = stockBo.findByStockCode("011");
System.out.println(stock2);

/**update**/
stock2.setStockName("GIS-1");
stockBo.update(stock2);

/** delete **/
stockBo.delete(stock2);

System.out.println("all done!");

}

}

7.运行结果如下：



源码地址： 点击打开链接 
https://github.com/ThinkingInGIS/SpringHibernateMysql.git
至此，spring与jdbc，jdbcTemplate，hibernate访问数据的方式都以介绍完毕啦。

（如遇到问题，请留言给作者，以便共同探讨gis知识。thinkingingis@qq.com）

Wechat公众号：ThinkingInGIS



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