out.println () output to the client. In Out.println (), out is an instance of response, which flows output as an object response, and outputs the content toclient. If you use SYSTEM.OUT.PRINTLN () in a JSP page, only one space is printed on the client.System.out.println () is printed in the console. SYSTEM.OUT.PRINTLN () uses the standard output stream, which is output on the console, and the JSP is not a console program. System.out.println () is printed on the console, either in the JSP or in the Java program. If you want to print on the page, the simple point is: Out.print ("What to print");In fact, in the formal construction of the website, is never out.println (), are directly using the label. Example: Server platform: Tomcat. Client: Firefox browser. SOURCE program://test.jsp file <% @page contenttype= "text/html;charset=gb2312"%><%@ page import = "Java.util.Date"%><%out.println ("This was printed by out.println."); System.out.println ("This was printed by System.out.println."); System.out.println ("This was printed by System.out.println."); System.out.println ("This was printed by System.out.println."); O Ut.println ("This was printed by out.println."); %> </body>OUT.PRINTLN () Differences in System.out.println () and JSPs in Java