Tomcat container Web. XML Specific Explanation

<init-param>

<param-name>debug</param-name>

<param-value>0</param-value>

</init-param>

Debug is set to debug level, and 0 indicates the least amount of information available. 9 indicates the most information provided .

<init-param>

<param-name>listings</param-name>

<param-value>false</param-value>

</init-param>

In the Web development phase, you typically want to list all pages under the Web path. This makes it easy to select the JSP page that needs to be debugged , listings is set to true to indicate the list page, False indicates that the display of the folder structure is not supported

<load-on-startup>1</load-on-startup>

1) Load-on-startupThe element tag container is loaded when it is started.servlet (instantiate and invoke itsInit ()Method).
2)its value must be an integer. Representsservletthe order that should be loaded
2)Duty is0or greater than0indicates that the container is loaded and initialized when the app is startedservlet.
3)Value less than0or when not specified. The container is represented in theservletbe loaded only when selected.
4)The smaller the value of a positive number, theservletthe higher the priority, the more loaded it will be when the app starts.
5)The same time as the duty. The container will be loaded in its own order of choice.

<servlet>

<servlet-name>jsp</servlet-name>

<servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>

<init-param>

<param-name>fork</param-name>

<param-value>false</param-value>

</init-param>

<init-param>

<param-name>xpoweredBy</param-name>

<param-value>false</param-value>

</init-param>

<load-on-startup>3</load-on-startup>

</servlet>

Number of references	Descriptive narrative
Development	The default value is true. Note that the JSP file is still in development, so Jasper should be modificationtestinterval by the number of JSP file for inspection. when the JSP changes, it is recompiled
Fork	The default value is true. Indicates that the JSPis compiled with a different JVM . This eliminates resource contention and class loader conflicts in the development phase
Checkinterval	Unit is seconds. Specifies that the Jasper at this time interval to check whether the JSP needs to be recompiled, the default feel 0. Indicates the use of a background program to process
Modificationtestinterval	It works primarily when development is true , and the default value is 4. Jasper will check to See if the JSP file is validated for changes at this frequency.
Compiler	The cache size to use when reading resources. Tacit feeling 2KB
Classdebuginfo	Cache size used when writing resources, default feel 2KB
keepgenerated	The default value is true. Instructs Jasper to keep the servlet in the working folder between Two calls to the servlet . This will greatly improve Tomcat 's efficiency.
Mappedfilegenstraschararray Dumpsmaptrimspaces Supresssmap	These are the optimization and debugging options used by JSP developers.
ScratchDir	Jasper the temporary directory that is used when compiling the JSP , it is implied that a temporary directory under the $CATALINA _home/work
Xpoweredby	I feel false. function for generating x-power-by header (header)
Compilertargetvm	To compile the target VM for the generated servlet
Compilersourcevm	Generate the source VM for the servlet

<mime-mapping>

<extension>zip</extension>

<mime-type>application/zip</mime-type>

</mime-mapping>

Mime-mapping is a node in Web. Xml. Used to specify the appropriate format for the browser processing, but also to configure the static page open encoding:

<mime-mapping>

<extension>htm</extension>

<mime-type>text/html;charset=gb2312</mime-type>

</mime-mapping>

<mime-mapping>

<extension>html</extension>

<mime-type>text/html;charset=gb2312</mime-type>

</mime-mapping>

Assuming that the Web application includes files that are infrequently used, it is necessary to ensure that some MIME typesare assigned, and themime-mapping element is designed for this purpose. Add mime-type mappings such as rar,iso . Avoid opening directly in the browser

<mime-mapping>

<extension>rar</extension>

<mime-type>application/octet-stream</mime-type>

</mime-mapping>

<mime-mapping>

<extension>iso</extension>

<mime-type>application/octet-stream</mime-type>

</mime-mapping>

of commonMIMEtype:
Hypertext Markup Language text. htm,.html text/html
Normal text. txt Text/plain
Rtftext. rtf Application/rtf
GifGraphics. gif image/gif
JpegGraphics. ipeg,.jpg Image/jpeg
AuSound Files. Au audio/basic
MidiMusic FilesMid,.midi Audio/midi,audio/x-midi
RealAudioMusic Files. RA,. Ram Audio/x-pn-realaudio
MPEGfile. Mpg,.mpeg Video/mpeg
Avifile. avi Video/x-msvideo
Gzipfile. GZ Application/x-gzip
TARfile. Tar Application/x-tar

Tomcat container Web. XML Specific Explanation