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package poll.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import javax.servlet.jsp.jstl.sql.Result; import javax.servlet.jsp.jstl.sql.ResultSupport; public class BaseDAO { private static final String driver="com.microsoft.sqlserver.jdbc.SQLServerDriver"; private static final String url="jdbc:sqlserver://localhost:1433;databaseName=POLL_DB"; public static Connection getCon(){ Connection con = null; try { con = null; Class.forName(driver); con = DriverManager.getConnection(url,"sa","123"); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } return con; } //无结果有参数 public static boolean runUpdateSql(String sql, Object[] params){ Connection con=null; PreparedStatement pst = null; try{ con = getCon(); pst = con.prepareStatement(sql); for (int i = 0; i < params.length; i++) { pst.setObject(i+1, params[i]); } pst.executeUpdate(); return true; }catch(Exception e){ e.printStackTrace(); }finally{ try{ pst.close(); con.close(); }catch(Exception e){e.printStackTrace(); } } return  true; } //you结果，wu参数 public static Result runSelectSql(String sql){ Connection con = null; PreparedStatement pst = null; ResultSet rst = null; Result result = null; //得到连接 con = getCon(); //rst = pst.execute();execute是boolean类型 try { pst = con.prepareStatement(sql); rst = pst.executeQuery(); result = ResultSupport.toResult(rst); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ try{ rst.close(); pst.close(); con.close(); }catch(Exception e){e.printStackTrace(); } } return result; } }

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