isThreadSafe attribute is used to set whether the generated Servlet handles multiple requests or single requests, depending on the set value of true or false. isThreadSafe attribute is used to set and ensure whether thread safety is implemented in the JSP page.
Syntax of isThreadSafe attribute available for page directive is:
<%@ page isThreadSafe=”true|false” %>
In the above statement, page and isThreadSafe are keywords. A true or false value can be set and, by default, the value is set to true. It implies that the JSP container can handle or send multiple concurrent client requests to the JSP page by starting a new thread. If the value of this attribute is set to false, then the JSP container sends client requests only one at a time to the JSP page.