java - Hibernate or JPA or JDBC or? -


i developing java desktop application have confusions in choosing technology persistence layer.

till now, have been using jdbc db operations. now, learnt hibernate , jpa still novice on these technologies.

now question use java desktop application following?

  • jpa

  • hibernate

  • jdbc

  • dao

  • any other suggestion you...

i know there no best choice them , totally depends on complexity , requeirements of project below requirements of project

  1. it's not complex application. contains 5 tables (and 5 entities)
  2. i wan't make code flexible can change database later easily
  3. the size of application should remain small possible have distribute clients through internet.
  4. it must free use in commercial development , distribution.

==================================== edited =======================================

on basis of below answers, go jpa prevent myself writing vendor-specific sql code.

but have problems in jpa mentioned @ java persistence api

here's take:

  • jpa: agnostic way java persistence without coupling clients hibernate, toplink, etc.
  • hibernate: choice if have object model map to.
  • jdbc: java persistence built on this. lowest level
  • dao: more of pattern technology; crud operation interface.
  • ibatis: halfway between jdbc (raw sql) , hibernate (orm).
  • jdo: java data objects, specification java persistence. (e.g., apache jdo)

it's not complex application. contains 5 tables (and 5 entities)

any of these work, jdbc simplest. others built on top of jdbc.

i want make code flexible can change database later easily

schema changes have similar effects in technologies.

the size of application should remain small possible have distribute clients through internet.

using jpa or hibernate require jars add size of deployment. jdbc minimize this.

it must free use in commercial development , distribution.

see licenses of technologies. shouldn't problem of them.

fyi: it's possible write generic dao interface:

package persistence;  import java.io.serializable; import java.util.list;  public interface genericdao<t, k extends serializable> {     t find(k id);     list<t> find();     list<t> find(t example);     list<t> find(string queryname, string [] paramnames, object [] bindvalues);      k save(t instance);     void update(t instance);     void delete(t instance); }

if objects map 1:1 5 tables, i'd jpa overkill squared.

is app on order of 3mb jar? if no, hibernate or jpa more double size. can quantify how much. , there's more 1 jar, because both have dependencies.

yagni says should keep simple. it's 5 tables!

changing vendor, if properly, means switching jdbc driver jar, changing driver class name, , adding new connection url - have no matter technology pick.

i find databases don't change radically. you'll change schema, entire vendor? not likely, if have several clients. it'll major inconvenience make user base switch databases.

which 1 planning ship with? hsql or require installation mysql? that's more pertinent concern.


Comments

Post a Comment

Popular posts from this blog

javascript - Using jquery append to add option values into a select element not working -

i'm looking dynamically populate select element names of items stored array. for reason it's not working , i'm not sure why. html: <div class="col-md-4 col-md-offset-4"> <select class="select1"> </select> , <select class="select2"> </select> </div> note i'm using bootstrap layout. here's jquery i'm using try , populate ".select1" jquery: select: function() { $.each(state.greens, function(index, value) { $(".select1").append("<option value =' " + index + " '>" + state.greens[index].name + "</option>"); }); } note function 'select' stored within object called 'display'. state.greens name of array i'm trying access. so @ end of html page call display.select(); call function. no error messages showing in console. also, saw question: appending
Read more

Android soft keyboard reverts to default keyboard on orientation change -

i'm building android soft keyboard , can't seem fix bug - have arabic , qwerty keyboard , when rotate device on qwerty keyboard (or arabic shift), it's if program has "restarted" , becomes arabic keyboard without shift. the onsaveinstancestate(bundle savedinstancestate) not work because application not extend activity inputmethodservice . i put following in android manifest android:configchanges="keyboard|keyboardhidden|orientation" android:windowsoftinputmode="stateunchanged|adjustresize"> i tried using @override public void onconfigurationchanged(configuration newconfig) { super.onconfigurationchanged(newconfig); log.i(mydebug, "config changed " + currentkeyboard.equals(qwerty)); } however, currentkeyboard.equals(qwerty)) results false , made sure true before orientation change. any appreciated. i think applications fault. if application restarting on orientation change
Read more

Rendering JButton to get the JCheckBox behavior in a JTable by using images does not update my table -

i rendering jbutton image on simulate jcheckbox behavior. why don't let jtable render jcheckbox? because need bigger checkboxes , there's no way can resize them (as far know). so, have own table cell renderer , editor. both renders jbutton , checkbox images on them. trying change image checked image unchecked image (or vice versa) , update cell value (boolean true or false). however, reason, getcelleditorvalue() not update table. so, release mouse, value goes original one. any appreciated! lot! public class tableexample extends jframe { jscrollpane pane; jpanel panel; jtable table; object[][] data; mytablemodel tm; renderer buttoncolumn; public tableexample(object[][] data) throws ioexception { string[] columns = {"column#1", "column#2", "column#3", "column#4", "column#5", "column#6"}; this.data = data; this.setpreferredsize(new dimension(700, 500));
Read more