Download Advanced JavaServer Pages by David Geary PDF

By David Geary

Hundreds of thousands of builders have came upon that JavaServer Pages signify the optimum resolution for cross-platform web-based improvement. Now that they have got mastered the fundamentals of JSP, many are searching for to deepen and boost their services. In complex JavaServer Pages, best-selling Java writer and previous JavaSoft developer David Geary promises the subtle enterprise-class recommendations they're looking for. Geary tackles JavaServer Pages 1.1 with an identical exhaustive, authoritative process that made his photo Java books such a success. He starts off with an intensive assessment of JSP components, servlets, and JavaBeans; then introduces customized and physique tags; and provides subtle insights into JSP-based net software layout. complicated JavaServer Pages comprises precise chapters on internationalization, safety, databases, electronic mail integration, and company JavaBeans. for each Java developer attracted to growing server-side courses with JavaServer Pages and Sun's servlet applied sciences

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Extra resources for Advanced JavaServer Pages

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In addition to making body content available to tag handlers, servlet containers also evaluate body content before it is made available to a tag handler. For example, the following use of the capitalize tag will result in the same output as shown in Figure 2-3 , because the JSP expression in the tag's body content is evaluated and the result of that evaluation—the string "capitalize this string"—is made available to the tag handler. 41 Advanced JavaServer Pages <%= "capitalize this string" %> The preceding code fragment listed above will produce the same output shown in Figure 2-3 as long as JSP, which is the default value, is specified for the tag's body content in the tag library descriptor, as follows.

The TagSupport methods are listed below: // TagSupport implements the Tag interface and adds the following // methods: protected String id; protected PageContext pageContext; static Tag findAncestorWithClass(Tag, Class) Object getValue(String key) void setValue(String key, Object value) void removeValue(String key) Enumeration getValues() String getId() void setId() TagSupport extensions have access to two protected variables: the tag's ID, and the page context. 25 Advanced JavaServer Pages The findAncestorWithClass method locates a tag's ancestor of a specified Java class.

Using JavaScript for Client-side Validation The left picture in Figure 3-3 shows the form partially filled in, and the right picture shows the result of submitting a partially filled in form. The JSP page shown in Figure 3-3 is listed in Example 3-3.

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