package com.hope.utils;import javax.sql.DataSource;import java.sql.Connection;import java.sql.SQLException;/** * @author newcityman * @date 2019/11/21 - 20:34 */public class ConnectionUtils { private ThreadLocal<Connection> t1 = new ThreadLocal<Connection>(); private DataSource dataSource; public void setDataSource(DataSource dataSource) { this.dataSource = dataSource; } /** * 获取当前线程的连接 * @return */ public Connection getThreadConnection() { try { //1、从当前线程上获取连接 Connection conn = t1.get(); //2、判断当前线程上是否有连接 if (conn == null) { //3、从数据源中获取连接，并且存入到线程中 conn = dataSource.getConnection(); t1.set(conn); } //4、返回当前线程上的连接 return conn; } catch (SQLException e) { throw new RuntimeException("创建连接失败"); } } /** * 把线程和连接解绑 */ public void removeConnection(){ t1.remove(); }}
package com.hope.utils;import java.sql.SQLException;/** * @author newcityman * @date 2019/11/21 - 20:52 */public class TransactionManager { private ConnectionUtils connectionUtils; public void setConnectionUtils(ConnectionUtils connectionUtils) { this.connectionUtils = connectionUtils; } /** * 开启事务 */ public void beainTransaction(){ try { connectionUtils.getThreadConnection().setAutoCommit(false); } catch (SQLException e) { e.printStackTrace(); } } /** * 提交事务 */ public void commit(){ try { connectionUtils.getThreadConnection().commit(); } catch (SQLException e) { e.printStackTrace(); } } /** * 事务回滚 */ public void rollback(){ try { connectionUtils.getThreadConnection().rollback(); } catch (SQLException e) { e.printStackTrace(); } } /** * 开启事务 */ public void release(){ try { connectionUtils.getThreadConnection().close(); } catch (SQLException e) { e.printStackTrace(); } }}//bean.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.xsd"> <!--配置service--> <bean id="accountService" class="com.hope.service.impl.AccountServiceImpl"> <!--注入dao--> <property name="accountDao" ref="accountDao"/> <!--注入txManager--> <property name="txManager" ref="txManager"/> </bean> <!--配置dao--> <bean id="accountDao" class="com.hope.dao.impl.AccountDaoImpl"> <!--注入runner--> <property name="runner" ref="runner"/> <!--注入connectionUtils--> <property name="connectionUtils" ref="connctionUtils"/> </bean> <!--配置QueryRunner--> <bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"> </bean> <!-- 配置数据源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!--连接数据库的必备信息--> <property name="driverClass" value="com.mysql.jdbc.Driver"/> <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/easy"/> <property name="user" value="root"/> <property name="password" value="123"/> </bean> <bean name="connctionUtils" class="com.hope.utils.ConnectionUtils"> <property name="dataSource" ref="dataSource"/> </bean> <bean name="txManager" class="com.hope.utils.TransactionManager"> <property name="connectionUtils" ref="connctionUtils"/> </bean></beans>
