20

Index

SERVER_SOFTWARE CGI variable, 

   portability of, 8

119

   power of, 8

service method, 36 37, 71, 154, 232, 

   reading form data from, 66 67

238, 241, 302, 329 30

   role of, 5 6

servletc.bat, 30, 31

   security of, 8 9

ServletConfig, 245

   session tracking in, 201

ServletContext, 245, 303, 354 56, 358, 

   setting HTTP response headers from, 

375

143 45

ServletExec (New Atlanta), 13

   simple HTML building utilities, 31 

servlet.jar, 29

34

Servlet life cycle, 34 39

   simple servlet generating plain text, 

   destroy method, 38 39

23 25

   doGet method, 37

      compiling/installing, 24 25

   doPost method, 37

      invoking, 25

   init method, 34 36

   and status line, 123 24

   service method, 36 37

   using to generate GIF images, 168 77

   SingleThreadModel interface, 38

servlets.properties, 43

ServletRequest, 244, 304, 329

ServletTemplate.java, 22

Servlets, 5 7, 50 52

ServletUtilities.java, 33, 88 89, 163, 

   advantages over  traditional  CGI, 7 

190 91

9

session attribute, page directive, 245, 

   API documentation, 14

259

   basic structure, 21 22

Session tracking, 180, 198 237, 353

   chaining, 376

   API, 201 5

   compiling in packages, 29 30

   associating information with a ses 

   convenience of, 7

sion, 205

   cost of, 9

   and cookies, 199 200

   creating in packages, 28 29

   encoding URLs sent to the client, 206 

   efficiency of, 7

7

   and HTML generation, 26 27

   and hidden form fields, 201

   initialization, example using, 44 49

   looking up the HttpSession object 

   initialization parameters, 39 44

associated with the current request, 202

   integrating JavaServer Pages (JSP) 

   looking up information associated 

and, 352 81

with a session, 202

   invoking in packages, 30 31

   need for, 199 201

   life cycle, 34 39

   online store example, 209 27

   packaging, 15, 27 31

      building the front end, 210 13

   page modification dates, example 

      Catalog.java, 225 27

using, 44 49

      CatalogPage.java, 210 13