Advanced JavaServer Pages - download pdf or read online

By David Geary

ISBN-10: 0130307041

ISBN-13: 9780130307040

Hundreds of thousands of builders have chanced on that JavaServer Pages characterize the optimum resolution for cross-platform web-based improvement. Now that they have mastered the fundamentals of JSP, many are searching for to deepen and boost their services. In complicated JavaServer Pages, best-selling Java writer and previous JavaSoft developer David Geary offers the subtle enterprise-class strategies they're trying to find. Geary tackles JavaServer Pages 1.1 with an identical exhaustive, authoritative technique that made his image Java books such a success. He starts off with an intensive overview of JSP components, servlets, and JavaBeans; then introduces customized and physique tags; and gives refined insights into JSP-based net program layout. complex JavaServer Pages contains particular chapters on internationalization, safety, databases, email integration, and firm JavaBeans. for each Java developer attracted to developing server-side courses with JavaServer Pages and Sun's servlet applied sciences

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B. getMessage()); } return SKIP_BODY; } } The tag handler listed above overrides doAfterBody and uses the bodyContent member defined in BodyTagSupport to obtain the tag's body content as a string. That content is converted to upper case and the tag's body content is cleared. Subsequently, the doAfterBody method prints the uppercase version of the content back into the body content and writes that content to the response stream. b , the capitalize tag handler listed above writes its body content to the previous out.

59 Advanced JavaServer Pages Because checkboxes are selected with a "checked" attribute and options are selected with a "selected" attribute, the methods categorySelectionAttr and yearSelectionAttr return "checked" and "selected", respectively, when a checkbox or option is selected. Validation Validation is often required for HTML forms and can be performed client-side— typically with JavaScript—or server-side, with JSP pages or servlets. Because client-side validation is performed on the client, feedback is much faster than for server-side validation, which requires a round trip to the server.

Jsp—that also uses the form bean to display the values of the textfield, text area, and the selected radio button. b. jsp at compile time. jsp would be evaluated on its own at runtime. jsp. a. = null ? = null ? equals(creditName) ? "checked" : ""; } return ""; } } The Form bean listed above has JavaBeans-compliant accessor methods that comply with the JavaBeans specification for the form's textfield (name), text area (comments), and radio buttons (credit). The most noteworthy aspect of the Form bean is that it encapsulates the code for accessing form values—including working around null values—instead of embedding that code within a JSP page.

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Advanced JavaServer Pages by David Geary


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