package BranchesMgr.dao;
/*** 数据库操作类* @author Administrator**/
import java.sql.*;
import java.util.List;
public class BaseDao {Connection conn=null;PreparedStatement ps=null;ResultSet rs=null;public void getConnection(){try {Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}if(conn==null){try {conn=DriverManager.getConnection("jdbc:sqlserver://127.0.0.1:1433;databasename=CityDB;User=sa;Password=171268");} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}//增删改public int excuteUpdate(String sql,List<Object> prams) throws SQLException{int rel=0;getConnection();ps=conn.prepareStatement(sql);if(prams!=null){for (int i = 0; i < prams.size(); i++) {ps.setObject(i+1, prams.get(i));}}rel=ps.executeUpdate();return rel;}//查询public ResultSet excuteQurey(String sql,List<Object>prams) throws SQLException{getConnection();ps=conn.prepareStatement(sql);if(prams!=null){for (int i = 0; i < prams.size(); i++) {ps.setObject(i+1, prams.get(i));}}rs=ps.executeQuery();return rs;}//关闭资源public void closeAll(){if(rs!=null){try {rs.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}if(ps!=null){try {ps.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}if(conn!=null){try {conn.close();conn=null;} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}
}