Offline PDF-udgave - Objektorienteret programmering i Java

javabog.dk − Webprogrammering med Java Server Pages − Forord
Indholdsfortegnelse
0 Forord...............................................................................................................................................................................................1
0.1 Bogens opbygning............................................................................................................................................................1
0.1.1 Hvert kapitels opbygning.......................................................................................................................................1
0.1.2 Til underviseren......................................................................................................................................................1
0.2 Netudgaven af bogen........................................................................................................................................................2
0.3 Tak....................................................................................................................................................................................2
0.4 Åben Dokumentlicens (ÅDL)...........................................................................................................................................2
1 Introduktion.....................................................................................................................................................................................4
1.1 Hvad er HTML?...............................................................................................................................................................4
1.2 Hvad er JSP?.....................................................................................................................................................................5
1.2.1 Princippet i serverside−teknologier........................................................................................................................6
1.3 Udviklingsværktøjer til JSP..............................................................................................................................................6
1.3.1 Oracle JDeveloper..................................................................................................................................................6
1.3.2 Netbeans og Sun Java Studio Creator....................................................................................................................7
1.3.3 Borland JBuilder.....................................................................................................................................................8
1.3.4 Eclipse og IBM WebSphere Studio........................................................................................................................9
1.4 Installation af en server.....................................................................................................................................................9
1.4.1 Tomcat..................................................................................................................................................................10
1.4.2 Resin.....................................................................................................................................................................11
1.5 PHP og ASP − JSPs fætre...............................................................................................................................................11
1.5.1 JSP fremfor PHP og ASP − fordele og ulemper...................................................................................................11
1.6 Videre læsning................................................................................................................................................................11
2 Grundelementer i JSP...................................................................................................................................................................13
2.1 JSP−programkode...........................................................................................................................................................13
2.1.1 En simpel side med HTML−kode........................................................................................................................13
2.1.2 Lægge JSP−serverkode ind i siden.......................................................................................................................14
2.1.3 Eksempel: Dags dato og tid..................................................................................................................................14
2.1.4 Hvis du ikke har en server til rådighed.................................................................................................................15
2.1.5 JSTL − en ny måde at arbejde på.........................................................................................................................15
2.2 Variabler.........................................................................................................................................................................15
2.2.1 Indlejrede java−udtryk..........................................................................................................................................16
2.2.2 Variabler med objekter.........................................................................................................................................17
2.2.3 Importere klassedefinitioner (pakker)..................................................................................................................17
2.3 Blanding af HTML og Java − to stilarter.......................................................................................................................18
2.3.1 Blandet Java og HTML........................................................................................................................................19
2.4 Data om klienten (request−objektet).............................................................................................................................19
2.5 Kommentarer..................................................................................................................................................................20
2.6 Test dig selv....................................................................................................................................................................21
2.7 Resumé...........................................................................................................................................................................21
2.8 Avanceret........................................................................................................................................................................21
2.8.1 Læse filer fra harddisken......................................................................................................................................21
2.8.2 Erklæring af metoder og blivende variabler.........................................................................................................21
2.8.3 Trådsikkerhed i JSP−sider....................................................................................................................................21
2.8.4 Producere grafik fra JSP.......................................................................................................................................21
2.8.5 Eksempel: JSP−side der danner et JPG−billede...................................................................................................21
2.8.6 Indlejre og nedskalere billeder fra harddisken.....................................................................................................21
2.8.7 Opload af filer til server.......................................................................................................................................22
3 Interaktive sider.............................................................................................................................................................................23
3.1 Parametre til sider...........................................................................................................................................................23
3.1.1 Aflæse en parameter fra URLen...........................................................................................................................24
3.1.2 Arbejde med parametrene.....................................................................................................................................24
3.2 HTML−formularer..........................................................................................................................................................25
3.2.1 Et lidt større eksempel..........................................................................................................................................26
3.2.2 Opgave..................................................................................................................................................................27
3.2.3 Lave HTML og behandle input med samme side................................................................................................28
3.2.4 De almindelige typer af formularfelter.................................................................................................................29
3.2.5 Aflæse alle parametre i en formular.....................................................................................................................30
3.2.6 Videre læsning......................................................................................................................................................31
3.2.7 Opgaver................................................................................................................................................................31
3.3 Appendiks: Typer af formularfelter................................................................................................................................31
3.4 Test dig selv....................................................................................................................................................................32
3.5 Resumé...........................................................................................................................................................................32
3.6 Avanceret........................................................................................................................................................................32
3.6.1 Indkode data i en URL (URL−indkodning).........................................................................................................32
3.6.2 Skjulte felter i formularer.....................................................................................................................................32
3.6.3 Bruge skjulte felter til at etablere et forløb...........................................................................................................33
3.6.4 Skjule parametrene (POST−metoden)..................................................................................................................33
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