实例如下:
package dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class BaseDao { private String drive="com.microsoft.sqlserver.jdbc.SQLServerDriver"; private String url="jdbc:sqlserver://localhost:1433;DatabaseName=BookManage"; private String user="sa"; private String password=""; protected Connection conn; protected PreparedStatement ps; protected ResultSet rs; public Connection getCon(){ try { Class.forName(drive); conn=DriverManager.getConnection(url, user, password); } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } return conn; } public void allClos(ResultSet rs,PreparedStatement ps,Connection conn){ try { if(rs!=null){ rs.close(); } if(ps!=null){ ps.close(); } if(conn!=null){ conn.close(); } } catch (SQLException e) { e.printStackTrace(); } } public int executeUpdate(String sql,Object...str){ int num=0; try { ps=getCon().prepareStatement(sql); if(ps!=null){ for(int i=0;i<str.length;i++){ ps.setObject(i+1, str[i]); } } num=ps.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); }finally { allClos(rs, ps, conn); } return num; } }
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