jsp-config

The default property values are tuned for development of JSP files at the cost of performance. To maximize performance, set jsp-config properties to these non-default values:

development - false (as an alternative, set to true and give modificationTestInterval a large value)
mappedfile - false
trimSpaces - true
suppressSmap - true
fork - false (on Solaris)
classdebuginfo - false

The following table describes properties for the jsp-config element.

`jsp-config` Properties

Property	Default	Description
`checkInterval`	`0`	If `development` is set to `false` and `checkInterval` is greater than zero, background compilations are enabled. The `checkInterval` is the time in seconds between checks to see if a JSP file needs to be recompiled.
`classdebuginfo`	`true`	Specifies whether the generated Java servlets are compiled with the debug option set (`-g` for `javac`).
`classpath`	created dynamically based on the current web application	Specifies the classpath to use when compiling generated servlets.
`compiler`	`javac`	Specifies the compiler Ant uses to compile JSP files. See the Ant documentation for more information: http://antinstaller.sourceforge.net/manual/manual/
`compilerSourceVM`	Depends on Enterprise Server's Java runtime	Specifies the JDK release with which source compatibility of the generated servlets is provided. Same as the `-source` `release` option of `javac`. For more information, see http://java.sun.com/javase/6/docs/technotes/tools/solaris/javac.html#options.
`compilerTargetVM`	Depends on Enterprise Server's Java runtime	Specifies the Virtual Machine for the Java platform (JVM software) version for which the servlet class files are generated. Same as the `-target` `release` option of `javac`. For more information, see http://java.sun.com/javase/6/docs/technotes/tools/solaris/javac.html#options.
`defaultBufferNone`	`false`	If `true`, the default for the `buffer` attribute of the `page` directive is `none`.
`development`	`true`	If set to `true`, enables development mode, which allows JSP files to be checked for modification. Specify the frequency at which JSPs are checked using the `modificationTestInterval` property.
`dumpSmap`	`false`	If set to `true`, dumps SMAP information for JSR 45 debugging to a file. Set to `false` if `suppressSmap` is `true`.
`enablePooling`	`true`	If set to `true`, tag handler pooling is enabled.
`enableTldValidation`	`false`	If set to `true`, all Tag Library Descriptor (TLD) files referenced by the web application are validated against their underlying schema or DTD file.
`errorOnUseBeanInvalidClassAttribute`	`false`	If set to `true`, issues an error when the value of the `class` attribute in a `useBean` action is not a valid bean class.
`fork`	`true`	Specifies that Ant forks the compiling of JSP files, using a JVM machine separate from the one in which Tomcat is running.
`genStrAsByteArray`	`true`	If `true`, text strings are generated as bytes (encoded with the page encoding), if the page is not buffered.
`genStrAsCharArray`	`false`	If set to `true`, generates text strings as `char` arrays, which improves performance in some cases.
`httpMethods`	`*` for all methods	Specifies a comma separated list of HTTP methods supported by the `JspServlet`.
`ieClassId`	`clsid:8AD9C840-044E-11D1-B3E9-00805F499D93`	Specifies the Java plug-in COM class ID for Internet Explorer. Used by the `<jsp:plugin>` tags.
`ignoreJspFragmentErrors`	`false`	If set to `true`, instructs the compiler to ignore any JSP precompilation errors pertaining to statically included JSP segments that, despite not being top level JSP files, use the `.jsp` or `.jspx` extension (instead of the recommended `.jspf`).
`initialCapacity`	`32`	Specifies the initial capacity of the `HashMap` that maps JSP files to their corresponding servlets.
`javaEncoding`	`UTF8`	Specifies the encoding for the generated Java servlet. This encoding is passed to the Java compiler that is used to compile the servlet as well. By default, the web container tries to use `UTF8`. If that fails, it tries to use the `javaEncoding` value. For encodings, see: http://java.sun.com/javase/6/docs/technotes/guides/intl/encoding.doc.html
`keepgenerated`	`true` with JDK 5 and before and for `jspc`, otherwise `false`	If set to `true`, keeps the generated Java files. If `false`, deletes the Java files.
`mappedfile`	`true`	If set to `true`, generates static content with one print statement per input line, to ease debugging.
`modificationTestInterval`	`0`	Specifies the frequency in seconds at which JSPs are checked for modification. A value of `0` causes the JSP to be checked on every access. Used only if `development` is set to `true`.
`reload-interval`	`0`	Specifies the frequency in seconds at which JSP files are checked for modifications. Setting this value to `0` checks JSP files for modifications on every request. Setting this value to `-1` disables checks for JSP modifications and JSP recompilation.
`saveBytecode`	`true` for `jspc`, otherwise `false`	If `true`, generated byte code is saved to `.class` files? This option is meaningful only when the Java compiler API, JSR 199 (available with and used as the default on Java 6) is used for `javac` compilations.
`scratchdir`	The default work directory for the web application	Specifies the working directory created for storing all the generated code.
`suppressSmap`	`false`	If set to `true`, generation of SMAP information for JSR 45 debugging is suppressed.
`trimSpaces`	`false`	If set to `true`, trims white spaces in template text between actions or directives.
`usePrecompiled`	`false`	If set to `true`, an accessed JSP file is not compiled. Its precompiled servlet class is used instead. It is assumed that JSP files have been precompiled, and their corresponding servlet classes have been bundled in the web application’s `WEB-INF/lib` or `WEB-INF/classes` directory.
`xpoweredBy`	`true`	If set to `true`, the X-Powered-By response header is added by the generated servlet.

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