JSP/Servlet Correspondence

Original JSP

A Random Number

<%= Math.random() %>

Possible resulting servlet code

public void _jspService(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

request.setContentType("text/html");

HttpSession session = request.getSession(true);

JspWriter out = response.getWriter();

out.println("
A Random Number
");

out.println(Math.random());

...

}

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JSP

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Example Using JSP 

Expressions

JSP Expressions

Current time: 

<%= new java.util.Date() %>

Your hostname: 

<%= request.getRemoteHost() %>

Your session ID: 

<%= session.getId() %>

The testParam form parameter:

<%= request.getParameter("testParam") %>

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JSP

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