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pattern for JSP is to use servlets, which should handle the requests, perform detailed computations, generate results to be displayed, and then forward the request to a JSP for presentation Another reason to minimize the amount of Java code in JSP scriptlets is that it can t be easily reused elsewhere You ll have to copy and paste useful scriptlets from one JSP to another Copy and paste is a bad development practice since it increases code bulk and makes maintenance difficult If you need to correct an error or make an enhancement, you ll have to locate every JSP that contains the scriptlet If you find yourself copying and pasting scriptlets, you should refactor the common code into Java source files so it can be reused across multiple JSPs A more complete discussion of JSP markup is beyond the scope of this book See JavaServer Pages [Whitehead2001] by Paul Whitehead or JSP: JavaServer Pages [Burd2001] by Barry Burd for good treatments of this topic WTP includes a JSP creation wizard and a JSP structured source editor JSP is actually a very complex source format since it combines HTML, JavaScript, and CSS in the template text with the JSP directives, tags, and scriptlets The JSP editor provides many advanced features, including syntax highlighting and content assist for JSP tags as well as full content assist for Java scriptlets You can set breakpoints in JSP source files and debug them just like you debug Java code You can step from the JSP source code into any Java source code called by scriptlets and tags In fact, since JSPs are compiled into servlets, you are debugging Java code However, the debugger shows you the JSP source code instead of the translated Java servlet code The mapping from the Java bytecodes back to the original JSP source code has been standardized in JSR 45: Debugging Support for Other Languages [JSR45] In this iteration you ll develop JSPs that allow League Planet users to log in and out of the Web site Users are not required to log in, but if they do, then additional function is available to them For example, fans can set up interest profiles, and managers can update game schedules and scores These functions require that users identify themselves to the League Planet Web application The login state of each user is held in a session variable We ll discuss how J2EE manages sessions in the next iteration Next we describe how to develop the login and logout JSPs For the GET method, the servlet simply forwards the request to either loginjsp or logoutjsp, which you ll create next The servlet determines the correct JSP by examining the User object in the session The getUser method retrieves the session object from the request The boolean true argument on the getSession method causes a new session object to be created if one doesn't already exist The forward method selects loginjsp if the user is not logged in, and logoutjsp if the user is logged in Note that you make these methods protected so you can test them later using Cactus (see Iteration 2: Integration Testing with Cactus section in 11). asp.net ean 13 reader NET EAN-13 Barcode Reader - KeepAutomation.com
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NET EAN-13 barcode reading dll supports EAN-13 barcode scanning in ASP.NET web application, Console application and Windows Forms project. If we compile this program and put the resulting executable in a file called say, then by asking the system to execute require 'rubygems' require 'starling' package comleagueplanet; public class User { private boolean loggedIn = false; private String userId = ""; public boolean isLoggedIn() { return loggedIn; } public void setLoggedIn(boolean loggedIn) { thisloggedIn = loggedIn; } public String getUserId() { return userId; } public void setUserId(String userId) { if (userId == null) { thisuserId = ""; } else { thisuserId = userId; } } public void logIn(String userId) { setLoggedIn(true); setUserId(userId); In this case, argc will be 3, and the three elements of argv will be pointers to the initial characters of arrays initialized with say, Hello, and world respectively We can visualize the value of argv this way: starling = Starlingnew('127001:22122') all_stats = starlingstats all_statseach do |server, stats| puts "Server: #{server}" statseach do |stat_name, stat_value| puts "#{stat_name}: #{stat_value}" end end } public void logOut() { setLoggedIn(false); setUserId(""); } } asp.net ean 13 reader Best 20 NuGet ean-13 Packages - NuGet Must Haves Package
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