JDBC

          

           try{

                

                 con=JdbcUtil.getConnection();

            st=con.createStatement();

            st.executeUpdate(sql);

                

           }catch(Exception e){

                

                 e.printStackTrace();

                

           }finally{

                

                 JdbcUtil.close(con,st);

                

                 }

           }

          

          

      public void update(){

          

           sql="update yuchen_user set name='liumang' where id=1";

           System.out.println(sql);

          

           try{

                

                 con=JdbcUtil.getConnection();

            st=con.createStatement();

            st.executeUpdate(sql);

                

           }catch(Exception e){

                

                 e.printStackTrace();