Spring之数据库操作

本文主要包括以下内容

  1. spring+jdbc数据库操作
  2. spring+jdbc声明事务处理
  3. spring+hibernate声明事务处理

spring+jdbc数据库操作

方法

1、让自己写的一个dao类继承JdbcDaoSupport
2、让自己写的一个dao类继承JdbcTemplate
3、让自己写的一个dao类里有一个属性为JdbcTemplate

总结

1、引入dataSource的方式：
1、在dataSource的设置中直接写值
2、引入properties文件
2、在dao的写法中有很多种，最终只需要把dataSource注入jdbcTemplate中

继承JdbcDaoSupport的方法

package cn.itcast.spring.jdbc;

import java.util.List;

import org.springframework.jdbc.core.support.JdbcDaoSupport;

public class PersonDao extends JdbcDaoSupport{
    public void update(){
        this.getJdbcTemplate().execute("update person set pname='a' where pid=3");
    }

    public void query(){
        List<Person> persons = this.getJdbcTemplate().query("select * from person", new PersonRowMapper());
        for(Person person:persons){
            System.out.println(person.getPname());
        }
    }
}

继承JdbcTemplate的方法

package cn.itcast.spring.jdbc;

import javax.sql.DataSource;

import org.springframework.jdbc.core.JdbcTemplate;

public class PersonDao2 extends JdbcTemplate{
    public PersonDao2(DataSource dataSource){
        super(dataSource);
    }
    public void update(){
        this.execute("update person set pname='aa' where pid=2");
    }
}

属性为JdbcTemplate的方法

package cn.itcast.spring.jdbc;

import javax.sql.DataSource;

import org.springframework.jdbc.core.JdbcTemplate;

public class PersonDao3{
    private JdbcTemplate jdbcTemplate;
    public JdbcTemplate getJdbcTemplate() {
        return jdbcTemplate;
    }
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }
    public void update(){
        this.jdbcTemplate.execute("update person set pname='aaa' where pid=2");
    }
}

其中查询时的PersonRowMapper为

package cn.itcast.spring.jdbc;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

public class PersonRowMapper implements RowMapper{

    @Override
    public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
        // TODO Auto-generated method stub
        Person person = new Person();
        person.setPid(rs.getLong("pid"));
        person.setPname(rs.getString("pname"));
        person.setPsex(rs.getString("psex"));
        return person;
    }
    /**
     * crud做一下
     */



}

注入dataSource的方法，在配置文件中配置

<?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">
    <bean
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <value>classpath:jdbc.properties</value>
        </property>
    </bean>


    <bean id="dataSource" destroy-method="close"
        class="org.apache.commons.dbcp.BasicDataSource">
        <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>

    <bean id="personDao" class="cn.itcast.spring.jdbc.PersonDao">
        <property name="dataSource">
            <ref bean="dataSource"/>
        </property>
    </bean>

    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource">
            <ref bean="dataSource"/>
        </property>
    </bean>

    <bean id="personDao2" class="cn.itcast.spring.jdbc.PersonDao2">
        <constructor-arg index="0" ref="dataSource"></constructor-arg>
    </bean>

    <bean id="personDao3" class="cn.itcast.spring.jdbc.PersonDao3">
        <property name="jdbcTemplate">
            <ref bean="jdbcTemplate"/>
        </property>
    </bean>
</beans>

jdbc.properties如下，路径在src文件夹下

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

测试

package cn.itcast.spring.jdbc;

import javax.sql.DataSource;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class PersonTest {
    @Test
    public void test(){
        ApplicationContext context = new ClassPathXmlApplicationContext("cn/itcast/spring/jdbc/applicationContext.xml");
        PersonDao personDao = (PersonDao)context.getBean("personDao");
        personDao.update();
    }

    @Test
    public void testDataSource()
    {
        ApplicationContext context=new ClassPathXmlApplicationContext("cn/itcast/spring/jdbc/applicationContext.xml");
        DataSource datasource=(DataSource) context.getBean("dataSource");
        System.out.println(datasource);
    }
}

spring+jdbc声明事务处理

spring声明式事务处理的步骤：
1、搭建环境
2、把dao层和service层的接口和类写完
3、在spring的配置文件中，先导入dataSource
4、测试
5、导入dao和service层的bean
6、测试
7、进行AOP的配置
1、引入事务管理器
2、进行aop的配置
8、测试service层的类看是否是代理对象

dao

package cn.itcast.spring.jdbc.transaction.sh.dao;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.support.AbstractPlatformTransactionManager;

import cn.itcast.spring.jdbc.transaction.bean.Person;

public class PersonDaoImpl extends JdbcDaoSupport implements PersonDao{

    @Override
    public List<Person> getPerson() {
        // TODO Auto-generated method stub
        return this.getJdbcTemplate().query("select * from person", new RowMapper() {

            @Override
            public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
                // TODO Auto-generated method stub
                Person person = new Person();
                person.setPid(rs.getLong("pid"));
                person.setPname(rs.getString("pname"));
                person.setPsex(rs.getString("psex"));
                return person;
            }
        });
    }

    @Override
    public void savePerson() {
        // TODO Auto-generated method stub
        this.getJdbcTemplate().update("insert into person values(11,'a','a')");
    }

}

Service

package cn.itcast.spring.jdbc.transaction.sh.service;

import java.util.List;

import org.springframework.transaction.PlatformTransactionManager;

import cn.itcast.spring.jdbc.transaction.bean.Person;
import cn.itcast.spring.jdbc.transaction.sh.dao.PersonDao;

public class PersonServiceImpl implements PersonService{
    private PersonDao personDao;

    public PersonDao getPersonDao() {
        return personDao;
    }

    public void setPersonDao(PersonDao personDao) {
        this.personDao = personDao;
    }

    @Override
    public List<Person> getPerson() {
        // TODO Auto-generated method stub
        return this.personDao.getPerson();
    }

    @Override
    public void savePerson() {
        // TODO Auto-generated method stub
        this.personDao.savePerson();

    }

}

spring配置文件

完成了以下功能
1. 导入dataSource
2. 导入dao和service层的bean
3. 引入事务管理器
4. 进行aop的配置 

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

    <bean
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <value>classpath:jdbc.properties</value>
        </property>
    </bean>

    <bean id="dataSource" destroy-method="close"
        class="org.apache.commons.dbcp.BasicDataSource">
        <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>

    <bean id="personDao" class="cn.itcast.spring.jdbc.transaction.sh.dao.PersonDaoImpl">
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
    </bean>


    <bean id="personService"
        class="cn.itcast.spring.jdbc.transaction.sh.service.PersonServiceImpl">
        <property name="personDao">
            <ref bean="personDao" />
        </property>
    </bean>

    <!-- 异常处理 -->
    <bean id="myException" class="cn.itcast.spring.jdbc.transaction.exception.MyException"></bean>

    <!-- 确定transactionManager的种类 -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>
    </bean>

    <!--
        通知 1、告诉spring容器，采用什么样的方法处理事务 2、告诉spring容器，目标方法应该采用什么样的事务处理策略
    -->
    <tx:advice id="tx" transaction-manager="transactionManager">
        <tx:attributes>
            <!--
                name规定方法 isolation(隔离机制) 默认值为DEFAULT propagation(传播机制) REQUIRED
            -->
            <tx:method name="save*" read-only="false" />
        </tx:attributes>
    </tx:advice>

    <aop:config>
        <aop:pointcut
            expression="execution(* cn.itcast.spring.jdbc.transaction.sh.service.*.*(..))"
            id="perform" />
        <aop:advisor advice-ref="tx" pointcut-ref="perform" />
        <aop:aspect ref="myException">
            <aop:after-throwing method="myException"
                pointcut-ref="perform" throwing="ex" />
        </aop:aspect>
    </aop:config>


</beans>

测试

package cn.itcast.spring.jdbc.transaction.test;

import javax.sql.DataSource;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.itcast.spring.jdbc.transaction.sh.service.PersonService;

public class TransactionTest {
    public static ApplicationContext context;
    static{
        context = new ClassPathXmlApplicationContext("cn/itcast/spring/jdbc/transaction/config/applicationContext.xml");
    }
    @Test
    public void testDataSource(){
        DataSource dataSource = (DataSource)context.getBean("dataSource");
        System.out.println(dataSource);
    }

    @Test
    public void testPesonDao(){
        context.getBean("personDao");
    }

    @Test
    public void testPersonService(){
        PersonService personService = (PersonService)context.getBean("personService");
        personService.savePerson();
    }
}

spring+hibernate声明事务处理

主要注意sessionFactory在spring配置文件中的配置

方法一

配置sessionFactory第一种方式
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="mappingResources">
            <list>
                <value>cn/itcast/spring/hiberante/transaction/domain/Person.hbm.xml</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <value>
                hibernate.dialect=org.hibernate.dialect.MySQLDialect
            </value>
        </property>
    </bean>

方法二

 <!-- 第二种方式，导入hibernate配置文件 -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="configLocation">
            <value>classpath:cn/itcast/spring/hibernate/transaction/config/hibernate.cfg.xml</value>
        </property>
    </bean>

详细代码如下

dao

package cn.itcast.spring.hibernate.transaction.dao.impl;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import cn.itcast.spring.hiberante.transaction.domain.Person;
import cn.itcast.spring.hibernate.transaction.dao.PersonDao;

public class PersonDaoImpl extends HibernateDaoSupport implements PersonDao{

    @Override
    public void savePerson(Person person) {
        // TODO Auto-generated method stub
        this.getHibernateTemplate().save(person);
    }

}

service

package cn.itcast.spring.hibernate.transaction.service.impl;

import org.hibernate.impl.SessionFactoryImpl;
import org.springframework.orm.jdo.JdoTemplate;
import org.springframework.orm.toplink.TopLinkTemplate;

import cn.itcast.spring.hiberante.transaction.domain.Person;
import cn.itcast.spring.hibernate.transaction.dao.PersonDao;
import cn.itcast.spring.hibernate.transaction.service.PersonService;

public class PersonServiceImpl implements PersonService{
    private PersonDao personDao;

    public PersonDao getPersonDao() {
        return personDao;
    }

    public void setPersonDao(PersonDao personDao) {
        this.personDao = personDao;
    }

    @Override
    public void savePerson(Person person) {
        // TODO Auto-generated method stub
        this.personDao.savePerson(person);
    }
}

配置文件

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
        http://www.springframework.org/schema/tx 
        http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

    <bean
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <value>classpath:jdbc.properties</value>
        </property>
    </bean>


    <bean id="dataSource" destroy-method="close"
        class="org.apache.commons.dbcp.BasicDataSource">
        <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>


    <!--
        sessionFactory 1、sessionFactoryImpl 2、利用spring的IOC和DI的特征
    -->
    <!-- 

    配置sessionFactory第一种方式
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="mappingResources">
            <list>
                <value>cn/itcast/spring/hiberante/transaction/domain/Person.hbm.xml</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <value>
                hibernate.dialect=org.hibernate.dialect.MySQLDialect
            </value>
        </property>
    </bean>
     -->
     <!-- 第二种方式，导入hibernate配置文件 -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="configLocation">
            <value>classpath:cn/itcast/spring/hibernate/transaction/config/hibernate.cfg.xml</value>
        </property>
    </bean>
    <bean id="personDao"
        class="cn.itcast.spring.hibernate.transaction.dao.impl.PersonDaoImpl">
        <property name="sessionFactory">
            <ref bean="sessionFactory"/>
        </property>
    </bean>

    <bean id="personService" class="cn.itcast.spring.hibernate.transaction.service.impl.PersonServiceImpl">
        <property name="personDao">
            <ref bean="personDao"/>
        </property>
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory">
            <ref bean="sessionFactory"/>
        </property>
    </bean>

    <tx:advice id="tx" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="save*" read-only="false"/>
        </tx:attributes>
    </tx:advice>

    <aop:config>
        <aop:pointcut expression="execution(* cn.itcast.spring.hibernate.transaction.service.impl.PersonServiceImpl.*(..))" id="perform"/>
        <aop:advisor advice-ref="tx" pointcut-ref="perform"/>
    </aop:config>
</beans>

测试

package cn.itcast.spring.hibernate.transaction.test;

import javax.sql.DataSource;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.itcast.spring.hiberante.transaction.domain.Person;
import cn.itcast.spring.hibernate.transaction.service.PersonService;

public class PersonTest {

    @Test
    public void testDataSource()
    {
        ApplicationContext context =  new ClassPathXmlApplicationContext("cn/itcast/spring/hibernate/transaction/config/applicationContext.xml");
        DataSource dataSource=(DataSource) context.getBean("dataSource");

    }
    @Test
    public void test(){
        ApplicationContext context =  new ClassPathXmlApplicationContext("cn/itcast/spring/hibernate/transaction/config/applicationContext.xml");
        PersonService personService = (PersonService)context.getBean("personService");
        Person person = new Person();
        person.setPname("a");
        personService.savePerson(person);
    }
}

完成

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原文地址：https://www.cnblogs.com/jjx2013/p/6223676.html