The difference between JspWriter and PrintWriter

JSP Nine hidden Objects

JspWriter out

JspWriter is an abstract class and PrintWriter is not, which means that you can create a new PrintWriter object directly by using the new operation and JspWriter not, it must be created by its subclass.
But they are also related, the relationship is mainly jspwriter to printwriter dependence. When initializing a JspWriter object, a PrintWriter object of the Servletresponse object is associated, and the output of the final JspWriter object is made by this PrintWriter type object.

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The difference between JspWriter and PrintWriter