Mysql-jdbc-事务

package com.kuang.lesson04;
import com.kuang.lesson02.utils.JdbcUtils;
import java.sql.*;
public class TestTransaction {
    public static void main(String[] args) throws SQLException {
        Connection conn =null;
        PreparedStatement st= null;
        ResultSet rs=null;
        try {
            conn= JdbcUtils.getConnection();
            //关闭数据库的自动提交，自动开启事务
            conn.setAutoCommit(false);//开启事务
            String sql1 ="update account set money = money-100 where name = 'A'";
            st=conn.prepareStatement(sql1);
            st.executeUpdate();
            String sql2 ="update account set money = money+100 where name = 'B'";
            st=conn.prepareStatement(sql2);
            st.executeUpdate();
            //业务完毕，提交事务
            conn.commit();
            System.out.println("成功");
        } catch (SQLException e) {
            try {
                conn.rollback();//如果失败就回滚事务
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
            e.printStackTrace();
        }finally {
            JdbcUtils.release(conn,st,rs);
        }
    }
}