Why jsp is already servlets available

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Overview of Java Runtime Environments. About Deployment Descriptors A web application's deployment descriptor describes the classes, resources and configuration of the application and how the web server uses them to serve web requests. Here is a simple filter implementation that logs a message, and passes control down the chain, which may include other filters or a servlet, as described by the deployment descriptor: package mysite.

IOException; import java. Logger; import javax. Filter; import javax. FilterChain; import javax. FilterConfig; import javax. ServletException; import javax. ServletRequest; import javax. Next Starting with first Servlet Application.

Recommended Articles. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. What's New. Ant and javac can still be used. Jasper is implemented using the servlet class org.

Default 0 seconds. This parameter only has an effect if the ServletContext attribute org. This attribute is always set when Jasper is used within Tomcat.

By default the classpath is created dynamically based on the current web application. The valid values for this are the same as for the compiler attribute of Ant's javac task.

There is no default value. If this attribute is set then setenv. Default value: 1. If true, the frequency at which JSPs are checked for modification may be specified via the modificationTestInterval parameter. This is a compilation option.

It will not alter the behaviour of JSPs that have already been compiled. If not present, the default EmbeddedServletOptions will be used. This option is ignored if running under a SecurityManager. Default false. Default UTF8. If more than this number of JSPs are loaded, the least recently used JSPs will be unloaded so that the number of JSPs loaded at any one time does not exceed this limit.

A value of zero or less indicates no limit. A value of zero or less indicates never unload. Default -1 modificationTestInterval - Causes a JSP and its dependent files to not be checked for modification during the specified time interval in seconds from the last time the JSP was checked for modification. A value of 0 will cause the JSP to be checked on every access.