package bank.util;
        import java.sql.Connection;
        import java.sql.SQLException;
        public class TransactionManager {
       	private static ThreadLocal tl=new ThreadLocal();
       	private Connection conn;
       	public TransactionManager(){
       		try {
        			conn=ConnectionUtil.getConn();
        		} catch (ClassNotFoundException e) {
        			e.printStackTrace();
        		} catch (SQLException e) {
        			e.printStackTrace();
        		}
       		//将获得的连接对象绑定到线程
        		tl.set(conn);
        	}
       	public static Connection getConn(){
       		//从当前线程中获取绑定的连接对象
       		return (Connection) tl.get();
        	}
       	//将连接对象的事务设置手动提交
       	public void openTransaction(){
       		try {
        			conn.setAutoCommit(false);
        		} catch (SQLException e) {
       			// TODO Auto-generated catch block
        			e.printStackTrace();
        		}
        	}
       	//事务提交
       	public void commitTransaction(){
       		try {
        			conn.commit();
        			conn.close();
        		} catch (SQLException e) {