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javabog.dk − Webprogrammering med Java Server Pages − Forord
Indholdsfortegnelse
5 Brug af databaser
5.8.2 På forhånd forberedt SQL....................................................................................................................................56
5.8.3 Lægge opdateringer i kø (batch)...........................................................................................................................56
5.8.4 Lægge 'stored procedures' i databasen..................................................................................................................56
5.8.5 Forbindelsespuljer (Connection pooling).............................................................................................................56
5.8.6 Metadata...............................................................................................................................................................57
5.8.7 Eksempel: Webgrænseflade til database..............................................................................................................57
5.9 Avanceret: JDBC RowSet..............................................................................................................................................57
5.9.1 JdbcRowSet..........................................................................................................................................................57
5.9.2 CachedRowSet.....................................................................................................................................................57
5.9.3 FilteredRowSet og JoinRowSet............................................................................................................................57
5.9.4 WebRowSet..........................................................................................................................................................57
5.9.5 Mere information..................................................................................................................................................57
6 JSTL − JSP Standard Tag Library..............................................................................................................................................58
6.1 Kernefunktionalitet ().............................................................................................................................................58
6.1.1 Regneudtryk med EL − Expression Language.....................................................................................................59
6.1.2 Variabler...............................................................................................................................................................60
6.1.3 Virkefelter.............................................................................................................................................................60
6.1.4 Sikkerhed og behandling af formularer................................................................................................................60
6.1.5 Løkker...................................................................................................................................................................61
6.1.6 Oversigt................................................................................................................................................................62
6.2 Internationalisering og formatering ()................................................................................................................63
6.2.1 Oversigt................................................................................................................................................................63
6.2.2 Eksempel på brug.................................................................................................................................................64
6.3 JSTL og databaser ()...........................................................................................................................................64
6.3.1 Oversigt................................................................................................................................................................65
6.4 XML−behandling ()...............................................................................................................................................66
6.4.1 Syndikering med XML−funktionerne i JSTL......................................................................................................66
6.4.2 Caching af nyhedskilder.......................................................................................................................................67
6.4.3 WebRowSet og XML−transformering med JSTL...............................................................................................67
6.4.4 Oversigt................................................................................................................................................................69
6.5 Forskellige funktioner ().......................................................................................................................................69
6.5.1 Oversigt................................................................................................................................................................70
6.6 Installation af JSTL og EL..............................................................................................................................................70
6.6.1 Versionsproblemer med JSTL og EL...................................................................................................................70
6.7 JSTL versus almindelig javakode i JSP..........................................................................................................................71
6.8 Kommunikation mellem JSTL og Java..........................................................................................................................71
6.8.1 Javabønner............................................................................................................................................................71
6.8.2 Implicit definerede objekter i EL........................................................................................................................71
6.9 Mere læsning..................................................................................................................................................................72
7 Inde i webserveren.........................................................................................................................................................................73
7.1 Servletter.........................................................................................................................................................................73
7.1.1 Anmodningsmetoder............................................................................................................................................74
7.1.2 Hvornår bruge JSP og hvornår bruge servletter...................................................................................................74
7.2 Installation af en servlet..................................................................................................................................................75
7.2.1 Flere URLer til samme servlet............................................................................................................................75
7.2.2 Avanceret: Automatisk binding af servletter........................................................................................................75
7.3 Avanceret: JSP−siders interne virkemåde......................................................................................................................75
7.3.1 Kigge i de genererede servletter...........................................................................................................................75
7.3.2 Eksempel..............................................................................................................................................................75
7.3.3 JSP−siders livscyklus...........................................................................................................................................76
7.4 Webapplikationer............................................................................................................................................................76
7.4.1 Pakkede webapplikationer (WAR−filer)..............................................................................................................76
7.5 Samlet driftsbeskrivelse (web.xml)................................................................................................................................77
7.6 Test dig selv....................................................................................................................................................................79
7.7 Resumé...........................................................................................................................................................................79
8 Sikkerhed og adgangskontrol.......................................................................................................................................................80
8.1 Kryptering og SSL..........................................................................................................................................................80
8.1.1 I gang med HTTPS...............................................................................................................................................80
8.1.2 HTTPS−standardporten........................................................................................................................................80
8.2 Adgangskontrol...............................................................................................................................................................80
8.2.1 Containerstyret adgangskontrol............................................................................................................................80
8.2.2 Hurtigt i gang med adgangskontrol......................................................................................................................80
8.3 Datakilder til adgangskontrol.........................................................................................................................................80
8.3.1 Brugerdata fra tekstfil...........................................................................................................................................80
8.3.2 Andre datakilder...................................................................................................................................................80
8.3.3 Brugerdata fra database........................................................................................................................................80
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