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JSP Example and Best Practices

JSP Example and Best Practices. Minpo, Jung. Web Application Architecture. Patterns for Web Application Development. Servlet model. Moving to JSP Model 1. Moving to JSP Model 2. JSP Processing. Structure of a JSP Page. JSP page = directives + declarations + expressions + scriptlets.

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JSP Example and Best Practices

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  1. JSP Example and Best Practices Minpo, Jung

  2. Web Application Architecture

  3. Patterns for Web Application Development Servlet model

  4. Moving to JSP Model 1

  5. Moving to JSP Model 2

  6. JSP Processing

  7. Structure of a JSP Page • JSP page = directives + declarations + expressions + scriptlets

  8. Directives • An example of the page directive <%@ page import="java.util.Date, java.io.*“ extends="myJSPpage“ buffer="32k" autoflush="false" %> <jsp:directive.page import="java.util.Date, java.io.* " extends="myJSPpage" buffer="32k" autoflush="false" /> <%@ include file="/legal/disclaimer.html"> <jsp:directive.include file="/templates/footer.html" />

  9. Declarations <%! int balance = 0; %> <%! public int getAccountBalance() { return balance; } %> <jsp:declaration> int balance = 0; </jsp:declaration> <jsp:declaration> public int getAccountBalance() { return balance; } </jsp:declaration>

  10. Expressions • Hello, my name is <%= getName() %>. How are you? • out.println("Hello, my name is "+ getName() + ". How are you?"); • <% StringBuffer sb = new StringBuffer(); • sb.append("Hello, my name is ""); • sb.append(getName()); • sb.append(". How are you?); • out.println(sb.toString()); • %> <jsp:expression></jsp:expression>

  11. Scriptlets • <% for (int n=0; n<10; n++) { • out.println(n); • out.println("<br>"); // Line break • } • %> • <jsp:scriptlet> • for (int n=0; n<10; n++) { • out.println(n); • out.println("<br>"); // Line break • } • </jsp:scriptlet>

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