The JavaServer Pages API allow you to define custom JSP tags that look like HTML or XML tags and a tag library is a set of user-defined tags that implement custom behavior.The taglib directive declares that your JSP page uses a set of custom tags, identifies the location of the library, and provides means for identifying the custom tags in your JSP page.The taglib directive follows the syntax given below −Where, the uri attribute value resolves to a location the container understands and the prefix attribute informs a container what bits of markup are custom actions.You can write the XML ... Read More

Following is an example that passes two values using the HTML FORM and the submit button. We are going to use the same JSP main.jsp to handle this input.                    First Name:                    Last Name:                     Keep this HTML in a file Hello.htm and put it in /webapps/ROOT directory. When you would access http://localhost:8080/Hello.htm, you will receive the following output.First Name: Last Name:   Try to enter the First Name and ... Read More

The following URL will pass two values to HelloForm program using the GET method.href="http://localhost:8080/main.jsp?first_name=ZARA&last_name=ALI" Below is the main.jsp JSP program to handle input given by web browser. We are going to use the getParameter() method which makes it very easy to access the passed information −           Using GET Method to Read Form Data               Using GET Method to Read Form Data                First Name:                                  Last ... Read More

The JavaServer Pages API allow you to define custom JSP tags that look like HTML or XML tags and a tag library is a set of user-defined tags that implement custom behavior.The taglib directive declares that your JSP page uses a set of custom tags, identifies the location of the library, and provides means for identifying the custom tags in your JSP page.The taglib directive follows the syntax given below −Here, the uri attribute value resolves to a location the container understands and the prefix attribute informs a container what bits of markup are custom actions.You can write the XML ... Read More

JSP handles requests using getParameter() method to read simple parameters and getInputStream() method to read binary data stream coming from the client.Reading Form Data using JSPJSP handles form data parsing automatically using the following methods depending on the situation −getParameter(): You call request.getParameter() method to get the value of a form parameter.getParameterValues(): Call this method if the parameter appears more than once and returns multiple values, for example, checkbox.getParameterNames(): Call this method if you want a complete list of all parameters in the current request.getInputStream(): Call this method to read binary data stream coming from the client.Read More

GET methodThe GET method sends the encoded user information appended to the page request. The page and the encoded information are separated by the ? character as follows −http://www.test.com/hello?key1=value1&key2=value2The GET method is the default method to pass information from the browser to the web server and it produces a long string that appears in your browser's Location:box. It is recommended that the GET method is better not used. if you have a password or other sensitive information to pass to the server.The GET method has size limitation: only 1024 characters can be in a request string.This information is passed using ... Read More

The include directive is used to include a file during the translation phase. This directive tells the container to merge the content of other external files with the current JSP during the translation phase. You may code include directives anywhere in your JSP page.The general usage form of this directive is as follows −The filename in the include directive is actually a relative URL. If you just specify a filename with no associated path, the JSP compiler assumes that the file is in the same directory as your JSP.You can write the XML equivalent of the above syntax as follows ... Read More

The include directive is used to include a file during the translation phase. This directive tells the container to merge the content of other external files with the current JSP during the translation phase. You may code the include directives anywhere in your JSP page.The general usage form of this directive is as follows −

The isScriptingEnabled attribute determines if the scripting elements are allowed for use.The default value (true) enables scriptlets, expressions, and declarations. If the attribute's value is set to false, a translation-time error will be raised if the JSP uses any scriptlets, expressions (non-EL), or declarations.The attribute's value can be set to false if you want to restrict the usage of scriptlets, expressions (non-EL), or declarations −

The isELIgnored attribute gives you the ability to disable the evaluation of Expression Language (EL) expressions which has been introduced in JSP 2.0.The default value of the attribute is true, meaning that expressions, ${...}, are evaluated as dictated by the JSP specification. If the attribute is set to false, then expressions are not evaluated but rather treated as static text.Following directive sets an expression not to be evaluated −