core JavaServer Faces by David Geary, Cay S. Horstmann

By David Geary, Cay S. Horstmann

JavaServer Faces offers to convey fast user-interface improvement to server-side Java. It permits builders to painlessly write server-side functions with no caring concerning the complexities of facing browsers and internet servers. It additionally automates low-level, dull information like regulate circulate and relocating code among net kinds and enterprise logic.JavaServer Faces used to be designed to help drag and drop improvement of server-side applications," yet you may also think about it as a conceptual layer on most sensible of servlets and JavaServer Pages (JSP). skilled JSP builders will locate that JavaServer Faces offers a lot of the plumbing that they presently need to enforce through hand. when you already use a server-side framework akin to Struts, you can find that JavaServers Faces makes use of the same structure, yet is extra versatile and extensible. JavaServer Faces additionally comes with server-side elements and an occasion version, that are essentially just like a similar ideas in Swing.JavaServer Faces is readily changing into the traditional Web-application framework. middle JavaServer Faces is the only ebook you want to grasp this robust and time-saving technology.Without assuming wisdom of JSP and servlets, middle JavaServer Faces: * exhibits find out how to construct extra strong purposes and steer clear of tedious handcoding * solutions questions such a lot builders do not even understand to invite * demonstrates how you can use JSF with Tiles to construct constant person interfaces instantly * presents tricks, tips, and particular "how-to" info with the intention to fast turn into extra effective * explains tips on how to combine JSF with databases, use listing companies, instant apps, and Webservices * teaches most sensible practices and solid behavior like utilizing sort sheets and message bundles * covers all the JSF tags and the way to create new tag libraries"

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Extra resources for core JavaServer Faces

Sample text

Public ProblemBean getCurrent() { 34. 35. get(currentIndex); } 36. 37. // PROPERTY: answer 38. public String getAnswer() { return ""; } 39. public void setAnswer(String newValue) { 40. try { 41. trim()); 42. getSolution() == answer) score++; 43. size(); 44. } 45. catch (NumberFormatException ex) { 46. } 47. } 48. } Listing 2-4. xml 1. > 2. 3. DOCTYPE faces-config PUBLIC 4. 0//EN" 5. dtd"> 6. 7. 8. 9. 10. en 11. de 12.

Figure 1-14. The JavaServer Faces Life Cycle [View full size image] 40 41 The Restore View phase retrieves the component tree for the requested page if it was displayed previously or constructs a new component tree if it is displayed for the first time. If the page was displayed previously, all components are set to their prior state. This means that JSF automatically retains form information. For example, when a user posts illegal data that are rejected during decoding, the old inputs are redisplayed so that the user can correct them.

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31. 32. 33. 63 64 Listing 2-3. java 1. corejsf; 2. ArrayList; 3. 4. public class QuizBean { 5. private ArrayList problems = new ArrayList(); 6. private int currentIndex; 7.

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