package com.wbg.springJavaConfig.entity;public class Admin {private int aId;private String aAccount;private String aPassword;private String aRank;public Admin(int aId, String aAccount, String aPassword, String aRank) {this.aId = aId;this.aAccount = aAccount;this.aPassword = aPassword;this.aRank = aRank;}public int getaId() {return aId;}public void setaId(int aId) {this.aId = aId;}public String getaAccount() {return aAccount;}public void setaAccount(String aAccount) {this.aAccount = aAccount;}public String getaPassword() {return aPassword;}public void setaPassword(String aPassword) {this.aPassword = aPassword;}public String getaRank() {return aRank;}public void setaRank(String aRank) {this.aRank = aRank;}@Overridepublic String toString() {return "Admin{" +"aId=" + aId +", aAccount='" + aAccount + '\'' +", aPassword='" + aPassword + '\'' +", aRank='" + aRank + '\'' +'}';}
}

public interface AdminDao {List<Admin> listAll();Admin getById(int aId);
}

public interface AdminService {List<Admin> listAll();Admin getById(int aId);
}

public class AdminServiceImpl implements AdminService {@Overridepublic List<Admin> listAll() {return null;}@Overridepublic Admin getById(int aId) {return null;}
}

 <!-- 数据库连接池 --><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="driverClass" value="org.mariadb.jdbc.Driver" /><property name="jdbcUrl" value="jdbc:mariadb://localhost:3306/wbg_logistics" /><property name="user" value="root" /><property name="password" value="123456" /><!-- c3p0连接池的私有属性 --><property name="maxPoolSize" value="30" /><property name="minPoolSize" value="10" /><!-- 关闭连接后不自动commit --><property name="autoCommitOnClose" value="false" /><!-- 获取连接超时时间 --><property name="checkoutTimeout" value="10000" /><!-- 当获取连接失败重试次数 --><property name="acquireRetryAttempts" value="2" /></bean><!-- 配置SqlSessionFactory对象 --><bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 注入数据库连接池 --><property name="dataSource" ref="dataSource" /><!-- 配置MyBaties全局配置文件:mybatis-config.xml --><property name="configLocation" value="classpath:mybatis-config.xml" /><!-- 扫描entity包 使用别名 --><property name="typeAliasesPackage" value="com.wbg.springJavaConfig.dao" /><!-- 扫描sql配置文件:mapper需要的xml文件 --><property name="mapperLocations" value="classpath:mapper/*.xml" /></bean>

 /*** C3p0的连接池* @return* @throws PropertyVetoException*/@Beanpublic DataSource getC3p0DataSource() throws PropertyVetoException {ComboPooledDataSource dataSource=new ComboPooledDataSource();dataSource.setDriverClass("org.mariadb.jdbc.Driver");dataSource.setJdbcUrl("jdbc:mariadb://localhost:3306/wbg_logistics");dataSource.setUser("root");dataSource.setPassword("123456");dataSource.setMaxPoolSize(30);return dataSource;}/*** MyBatis的连接池* @return*///@Beanpublic DataSource getMyBatisDataSource(){//数据库连接池PooledDataSource dataSource = new PooledDataSource();//设驱动dataSource.setDriver("org.mariadb.jdbc.Driver");//用户名dataSource.setUsername("root");//密码dataSource.setPassword("123456");//数据库连接dataSource.setUrl("jdbc:mariadb://localhost:3306/wbg_logistics");dataSource.setDefaultAutoCommit(false);return dataSource;}/*** Spring自带的SimpleDriverDataSource* @return*///@Beanpublic DataSource getSimpleDriverDataSource(){SimpleDriverDataSource dataSource=new SimpleDriverDataSource();return dataSource;}

 /*** 获取SqlSessionFactoryBean** @return*/@Beanpublic SqlSessionFactoryBean getSqlSessionFactory(DataSource dataSource){SqlSessionFactoryBean sqlSessionFactoryBean=new SqlSessionFactoryBean();//注入数据库连接池
        sqlSessionFactoryBean.setDataSource(dataSource);//配置MyBaties全局配置文件:mybatis-config.xmlsqlSessionFactoryBean.setConfigLocation(new ClassPathResource("mybatis-config.xml"));//扫描entity包 使用别名sqlSessionFactoryBean.setTypeAliasesPackage("com.wbg.springJavaConfig.dao");//扫描sql配置文件:mapper需要的xml文件sqlSessionFactoryBean.setMapperLocations(new Resource[]{new ClassPathResource("classpath:mapper/*.xml")});return sqlSessionFactoryBean;}

package com.wbg.springJavaConfig.Mybatis;import com.mchange.v2.c3p0.ComboPooledDataSource;
import com.wbg.springJavaConfig.dao.AdminDao;
import com.wbg.springJavaConfig.entity.Admin;
import org.apache.ibatis.datasource.pooled.PooledDataSource;
import org.apache.ibatis.mapping.Environment;
import org.apache.ibatis.session.*;
import org.apache.ibatis.transaction.TransactionFactory;
import org.apache.ibatis.transaction.jdbc.JdbcTransactionFactory;import javax.sql.DataSource;
import java.beans.PropertyVetoException;public class MySqlSessionFactory  {public static SqlSession getopenSession() throws PropertyVetoException {SqlSessionFactory sqlSessionFactory=getSqlSessionFactory(getC3p0DataSource());sqlSessionFactory.openSession();SqlSession sqlSession=null;try {//打开SqlSession会话sqlSession = sqlSessionFactory.openSession();sqlSession.commit();//提交事务}catch (Exception ex){sqlSession.rollback();//回滚
        }return sqlSession;}public static DataSource getC3p0DataSource() throws PropertyVetoException {ComboPooledDataSource dataSource=new ComboPooledDataSource();dataSource.setDriverClass("org.mariadb.jdbc.Driver");dataSource.setJdbcUrl("jdbc:mariadb://localhost:3306/wbg_logistics");dataSource.setUser("root");dataSource.setPassword("123456");dataSource.setMaxPoolSize(30);return dataSource;}public static SqlSessionFactory getSqlSessionFactory(DataSource dataSource){TransactionFactory transactionFactory = new JdbcTransactionFactory();Environment environment = new Environment("development", transactionFactory, dataSource);//创建Configuration对象org.apache.ibatis.session.Configuration configuration = new org.apache.ibatis.session.Configuration(environment);//注册一个MyBatis上下文别名configuration.getTypeAliasRegistry().registerAlias("admin", Admin.class);//加入一个映射器configuration.addMapper(AdminDao.class);//使用SqlSessionFactoryBuilder构建SqlSessionFactory//构建SqlSessionFactorySqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(configuration);return sqlSessionFactory;}}