jsp - Java Desktop-App to Java-Web-App -

i new java-web-programming , non-gui netbeans-codes compiling whenever place jsp tags, gui netbeans-codes full of errors whenever place jsp tags:<%! %> , <% %>. below 1 of netbeans-gui codes simple "salary tagging system" 3 labels corresponding 3 textfields(dspid, dspname,dspsal). right jsp-tagging way?

public class employee extends javax.swing.jframe {     // variables declaration                      private javax.swing.jtextarea disparea; private javax.swing.jtextfield dispid; private javax.swing.jtextfield dispname; private javax.swing.jtextfield dispsal; private javax.swing.jbutton findbutton; private javax.swing.jlabel jlabel1; private javax.swing.jlabel jlabel2; private javax.swing.jlabel jlabel3; private javax.swing.jscrollpane jscrollpane1; // end of variables declaration       public employee() {     initcomponents(); }  @suppresswarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="generated code">                           private void initcomponents() {      findbutton = new javax.swing.jbutton();     jlabel1 = new javax.swing.jlabel();     jlabel2 = new javax.swing.jlabel();     dispid = new javax.swing.jtextfield();     dispname = new javax.swing.jtextfield();     jscrollpane1 = new javax.swing.jscrollpane();     disparea = new javax.swing.jtextarea();     jlabel3 = new javax.swing.jlabel();     dispsal = new javax.swing.jtextfield();      setdefaultcloseoperation(javax.swing.windowconstants.exit_on_close);      findbutton.settext("find");     findbutton.addactionlistener(new java.awt.event.actionlistener() {         public void actionperformed(java.awt.event.actionevent evt) {             findbuttonactionperformed(evt);         }     });      jlabel1.settext("employee id");      jlabel2.settext("name");      disparea.setcolumns(20);     disparea.setrows(5);     jscrollpane1.setviewportview(disparea);      jlabel3.settext("salary");      dispsal.settext("                                     ");   }// </editor-fold>                          private void findbuttonactionperformed(java.awt.event.actionevent evt) {                                                  try{          class.forname( "com.mysql.jdbc.driver" );         connection con = drivermanager.getconnection("jdbc:mysql://localhost:3306/emp","root","");             statement statement = con.createstatement();          string query = "select * empinfo ";         query +="where empinfo = "+this.dispid.gettext();          if(this.dispname.gettext().length() != 0){             query +=" , name = '"+this.dispname.gettext()+"'";         }              if(this.dispsal.gettext().length() != 0){             query +=" , salary = '"+this.dispsal.gettext()+"'";         }          //disparea.append("\nyour query :"+query+"\n");          resultset rs = statement.executequery(query);          boolean morerecords = rs.next();         if(!morerecords){             disparea.append("sorry,no match!");                  this.dispid.settext("");          }         do{             this.dispname.settext(rs.getstring(2));                     this.dispsal.settext(rs.getstring(3));             this.disparea.settext(rs.getstring(4));         }while(rs.next());         statement.close();         con.close();      }      catch(sqlexception e){         disparea.append("");         //outputjtextarea.append(e.getstacktrace().tostring());         //e.printstacktrace();       }catch(classnotfoundexception e){         //e.printstacktrace();         disparea.append("");     }  }                                            public static void main(string args[]) {     java.awt.eventqueue.invokelater(new runnable() {          public void run() {             new employee().setvisible(true);         }     }); } 

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one way make application both gui , web capable redesign using mvc principle. put separates display part data , processing.