Get user agent in JSP

This is how you can show the user agent in JavaServer Pages (JSP):

Version 1

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>JSP Page</title>
  </head>
  <body>
    <%
      String userAgent = request.getHeader("user-agent");
      out.print(userAgent);
    %>
  </body>
</html>

Version 2

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>JSP Page</title>
  </head>
  <body>
    <%
      String userAgent = request.getHeader("user-agent");
    %>
    <%= userAgent %>
  </body>
</html>

Version 3

<%@taglib uri='http://java.sun.com/jsp/jstl/core' prefix='c'%>
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>JSP Page</title>
  </head>
  <body>
  <c:out value="${header['User-Agent']}" />
</body>
</html>

Version 4

<%@taglib uri='http://java.sun.com/jsp/jstl/core' prefix='c'%>
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>JSP Page</title>
  </head>
  <body>
  <c:set var="userAgent" scope="page" value="${header['User-Agent']}"/>
  <c:out value="${userAgent}" />
</body>
</html>

Version 5

<%@taglib uri='http://java.sun.com/jsp/jstl/core' prefix='c'%>
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>JSP Page</title>
  </head>
  <body>
  <c:set var="userAgent" scope="page" value="${header['User-Agent']}"/>
  <%=pageContext.getAttribute("userAgent")%>
</body>
</html>

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