Posts about JSP
JSP HTTP status code
May 12, 2021 11:00 0 Comment JSP
JSP HTTP status code, JSP HTTP status code, The method of setting the HTTP status code, An example of an HTTP status code program, JSP, HTTP status code, HTTP requests are similar in format to HTTP responses and have the following structure:, Start with the status line and CRLF (r
The JSP server responds
May 12, 2021 11:00 0 Comment JSP
The JSP server responds, The JSP server responds, HttpServletResponse class, An example of an HTTP response header, The JSP, server responds, The Response response object primarily sends the results of the JSP container processing back to the client., You can set th
JSP client request
May 12, 2021 11:00 0 Comment JSP
The JSP client requests, The JSP client requests, HttpServletRequest class, HTTP header example, HTTP Header Request Example, The JSP, client requests, When a browser requests a Web page, it sends a series of information to the web server that cannot be read directly because
JSP filter
May 12, 2021 11:00 0 Comment JSP
JSP filter, JSP filter, Servlet filter method, Example of a JSP filter, The .xml the JSP filter map in the file, Use multiple filters, The order in which the filters are applied, JSP, filter, The filters in both Servlet and JSP are Java classes that exist for the following purposes:, Intercept a back-end resource when it is req
JSP Standard Label Library (JSTL)
May 12, 2021 12:00 0 Comment JSP
JSP Standard Label Library (JSTL)., JSP Standard Label Library (JSTL)., JSTL library installation, Core labels, Format the label, SQL tags, XML tags, JSTL function, JSP, Standard Label Library (JSTL)., The JSP Standard Label Library (JSTL) is a collection of JSP labels that encapsulates the common core functionali
JSP exception handling
May 12, 2021 12:00 0 Comment JSP
JSP exception handling, JSP exception handling, Use The Exception object, Use the JSTL tag on the error page, Using try... catch block, JSP, exception handling, When writing JSP programs, programmers may miss bugs that can appear anywhere in the program., There are usually several type
JSP expression language
May 12, 2021 12:00 0 Comment JSP
JSP expression language, JSP expression language, A simple syntax, The underlying operator in THE EL, Functions in JSP EL, JSP EL implied object, PageContext object, Scope object, param and paraamValues objects, Header and headerValues objects, JSP, expression language, The JSP Expression Language (EL) makes it easy to access data stored in JavaBean. J, SP EL can be used to create both arithm
JSP custom labels
May 12, 2021 12:00 0 Comment JSP
JSP custom label, JSP custom label, Create a Hello label, Access the label body, Custom label properties, JSP, custom label, Custom labels are user-defined JSP language elements., When a JSP page contains a custom label, it is converted to a servlet, which
JSP JavaBean
May 12, 2021 12:00 0 Comment JSP
JSP JavaBean, JSP JavaBean, JavaBeans properties, Example of a JavaBeans program, Visit Java Beans, Access the properties of the Java Beans object, JSP, JavaBean, JavaBean is a special Java class, a re-usable component written in the Java language, and adheres to the Java Beans API specification.,
JSP XML data processing
May 12, 2021 12:00 0 Comment JSP
JSP XML data processing, JSP XML data processing, Send XML using JSP, Handle XML in JSP, Format XML using JSP, JSP, XML data processing, When sending XML data over HTTP, it is necessary to use JSP to process incoming and outflowd XML documents, such as RSS docu
JSP connects to the database
May 12, 2021 12:00 0 Comment JSP
JSP connects to the database, JSP connects to the database, Create a table, Insert a data record, SELECT operation, INSERT operation, DELETE operation, UPDATE operation, JSP, connects to the database, This section assumes that you already have some knowledge of JDBC., Before you begin learning about JSP database access
JSP sends a message
May 12, 2021 12:00 0 Comment JSP
JSP sends a message, JSP sends a message, Send a simple message, Send an HTML message, Include attachments in the message, The user authentication section, Use the form to send a message, JSP, sends a message, Although using JSP to implement messaging is simple, you need the JavaMail API and you need to install the JavaBean Activation F
JSP refreshes automatically
May 12, 2021 12:00 0 Comment JSP
JSP refreshes automatically, JSP refreshes automatically, An example of an automatic page refresher, JSP, refreshes automatically, Imagine if you wanted to live-stream the score of a game, or the real-time state of the stock market, or the current for
JSP click count
May 12, 2021 12:00 0 Comment JSP
JSP click count, JSP click count, Example demonstration, Reset the counter, JSP, click count, Sometimes we need to know how many times a page has been visited, and then we need to add a page statisticstor to the page, which ty
JSP debugging
May 12, 2021 13:00 0 Comment JSP
JSP debugging, JSP debugging, Using System.out.println(), Use JDB Logger, Debug the tool, Use JDB Debugger, Use comments, The header module for the client and server, Important debugging techniques, JSP, debugging, It's always hard to test/debug a JSP or servlet program., JSPs and servlets tend to involve a large number of client/server interactio