web.xml

有关于tomcat数据库连接池的的基本配置

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">

  <!-- ======================== Introduction ============================== -->
  <!-- This document defines default values for *all* web applications      -->
  <!-- loaded into this instance of Tomcat.  As each application is         -->
  <!-- deployed, this file is processed, followed by the                    -->
  <!-- "/WEB-INF/web.xml" deployment descriptor from your own               -->
  <!-- applications.                                                        -->
  <!--                                                                      -->
  <!-- WARNING:  Do not configure application-specific resources here!      -->
  <!-- They should go in the "/WEB-INF/web.xml" file in your application.   -->


  <!-- ================== Built In Servlet Definitions ==================== -->


  <!-- The default servlet for all web applications, that serves static     -->
  <!-- resources.  It processes all requests that are not mapped to other   -->
  <!-- servlets with servlet mappings (defined either here or in your own   -->
  <!-- web.xml file.  This servlet supports the following initialization    -->
  <!-- parameters (default values are in square brackets):                  -->
  <!--                                                                      -->
  <!--   debug               Debugging detail level for messages logged     -->
  <!--                       by this servlet.  [0]                          -->
  <!--                                                                      -->
  <!--   fileEncoding        Encoding to be used to read static resources   -->
  <!--                       [platform default]                             -->
  <!--                                                                      -->
  <!--   input               Input buffer size (in bytes) when reading      -->
  <!--                       resources to be served.  [2048]                -->
  <!--                                                                      -->
  <!--   listings            Should directory listings be produced if there -->
  <!--                       is no welcome file in this directory?  [false] -->
  <!--                       WARNING: Listings for directories with many    -->
  <!--                       entries can be slow and may consume            -->
  <!--                       significant proportions of server resources.   -->
  <!--                                                                      -->
  <!--   output              Output buffer size (in bytes) when writing     -->
  <!--                       resources to be served.  [2048]                -->
  <!--                                                                      -->
  <!--   readonly            Is this context "read only", so HTTP           -->
  <!--                       commands like PUT and DELETE are               -->
  <!--                       rejected?  [true]                              -->
  <!--                                                                      -->
  <!--   readmeFile          File name to display with the directory        -->
  <!--                       contents. [null]                               -->
  <!--                                                                      -->
  <!--   sendfileSize        If the connector used supports sendfile, this  -->
  <!--                       represents the minimal file size in KB for     -->
  <!--                       which sendfile will be used. Use a negative    -->
  <!--                       value to always disable sendfile.  [48]        -->
  <!--                                                                      -->
  <!--  For directory listing customization. Checks localXsltFile, then     -->
  <!--  globalXsltFile, then defaults to original behavior.                 -->
  <!--                                                                      -->
  <!--   localXsltFile       Make directory listings an XML doc and         -->
  <!--                       pass the result to this style sheet residing   -->
  <!--                       in that directory. This overrides              -->
  <!--                        globalXsltFile[null]                          -->
  <!--                                                                      -->
  <!--   globalXsltFile      Site wide configuration version of             -->
  <!--                       localXsltFile This argument is expected        -->
  <!--                       to be a physical file. [null]                  -->
  <!--                                                                      -->
  <!--                                                                      -->

    <servlet>
        <servlet-name>default</servlet-name>
        <servlet-class>org.apache.catalina.servlets.DefaultServlet</servlet-class>
        <init-param>
            <param-name>debug</param-name>
            <param-value>0</param-value>
        </init-param>
        <init-param>
            <param-name>listings</param-name>
            <param-value>false</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>


  <!-- The "invoker" servlet, which executes anonymous servlet classes      -->
  <!-- that have not been defined in a web.xml file.  Traditionally, this   -->
  <!-- servlet is mapped to the URL pattern "/servlet/*", but you can map   -->
  <!-- it to other patterns as well.  The extra path info portion of such a -->
  <!-- request must be the fully qualified class name of a Java class that  -->
  <!-- implements Servlet (or extends HttpServlet), or the servlet name     -->
  <!-- of an existing servlet definition.     This servlet supports the     -->
  <!-- following initialization parameters (default values are in square    -->
  <!-- brackets):                                                           -->
  <!--                                                                      -->
  <!--   debug               Debugging detail level for messages logged     -->
  <!--                       by this servlet.  [0]                          -->

<!--
    <servlet>
        <servlet-name>invoker</servlet-name>
        <servlet-class>
          org.apache.catalina.servlets.InvokerServlet
        </servlet-class>
        <init-param>
            <param-name>debug</param-name>
            <param-value>0</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
    </servlet>
-->


  <!-- The JSP page compiler and execution servlet, which is the mechanism  -->
  <!-- used by Tomcat to support JSP pages.  Traditionally, this servlet    -->
  <!-- is mapped to the URL pattern "*.jsp".  This servlet supports the     -->
  <!-- following initialization parameters (default values are in square    -->
  <!-- brackets):                                                           -->
  <!--                                                                      -->
  <!--   checkInterval       If development is false and checkInterval is   -->
  <!--                       greater than zero, background compilations are -->
  <!--                       enabled. checkInterval is the time in seconds  -->
  <!--                       between checks to see if a JSP page needs to   -->
  <!--                       be recompiled. [0]                             -->
  <!--                                                                      -->
  <!--   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.                 -->
  <!--                       Used in development mode only. [4]             -->
  <!--                                                                      -->
  <!--   compiler            Which compiler Ant should use to compile JSP   -->
  <!--                       pages.  See the Ant documentation for more     -->
  <!--                       information. [javac]                           -->
  <!--                                                                      -->
  <!--   classdebuginfo      Should the class file be compiled with         -->
  <!--                       debugging information?  [true]                 -->
  <!--                                                                      -->
  <!--   classpath           What class path should I use while compiling   -->
  <!--                       generated servlets?  [Created dynamically      -->
  <!--                       based on the current web application]          -->
  <!--                                                                      -->
  <!--   development         Is Jasper used in development mode? If true,   -->
  <!--                       the frequency at which JSPs are checked for    -->
  <!--                       modification may be specified via the          -->
  <!--                       modificationTestInterval parameter. [true]     -->
  <!--                                                                      -->
  <!--   enablePooling       Determines whether tag handler pooling is      -->
  <!--                       enabled  [true]                                -->
  <!--                                                                      -->
  <!--   fork                Tell Ant to fork compiles of JSP pages so that -->
  <!--                       a separate JVM is used for JSP page compiles   -->
  <!--                       from the one Tomcat is running in. [true]      -->
  <!--                                                                      -->
  <!--   ieClassId           The class-id value to be sent to Internet      -->
  <!--                       Explorer when using <jsp:plugin> tags.         -->
  <!--                       [clsid:8AD9C840-044E-11D1-B3E9-00805F499D93]   -->
  <!--                                                                      -->
  <!--   javaEncoding        Java file encoding to use for generating java  -->
  <!--                       source files. [UTF8]                           -->
  <!--                                                                      -->
  <!--   keepgenerated       Should we keep the generated Java source code  -->
  <!--                       for each page instead of deleting it? [true]   -->
  <!--                                                                      -->
  <!--   mappedfile          Should we generate static content with one     -->
  <!--                       print statement per input line, to ease        -->
  <!--                       debugging?  [true]                             -->
  <!--                                                                      -->
  <!--   trimSpaces          Should white spaces in template text between   -->
  <!--                       actions or directives be trimmed?  [false]     -->
  <!--                                                                      -->
  <!--   suppressSmap        Should the generation of SMAP info for JSR45   -->
  <!--                       debugging be suppressed?  [false]              -->
  <!--                                                                      -->
  <!--   dumpSmap            Should the SMAP info for JSR45 debugging be    -->
  <!--                       dumped to a file? [false]                      -->
  <!--                       False if suppressSmap is true                  -->
  <!--                                                                      -->
  <!--   genStrAsCharArray   Should text strings be generated as char       -->
  <!--                       arrays, to improve performance in some cases?  -->
  <!--                       [false]                                        -->
  <!--                                                                      -->
  <!--   errorOnUseBeanInvalidClassAttribute                                -->
  <!--                       Should Jasper issue an error when the value of -->
  <!--                       the class attribute in an useBean action is    -->
  <!--                       not a valid bean class?  [true]                -->
  <!--                                                                      -->
  <!--   scratchdir          What scratch directory should we use when      -->
  <!--                       compiling JSP pages?  [default work directory  -->
  <!--                       for the current web application]               -->
  <!--                                                                      -->
  <!--   xpoweredBy          Determines whether X-Powered-By response       -->
  <!--                       header is added by generated servlet  [false]  -->
  <!--                                                                      -->
  <!--   compilerTargetVM    Compiler target VM                             -->  
  <!--                       default is System.properties                   -->
  <!--                        java.specification.version > 1.4              -->
  <!--                        [1.5] else [1.4]                              -->
  <!--                                                                      -->
  <!--   compilerSourceVM    Compiler source VM                             -->
  <!--                       default is System.properties                   -->
  <!--                        java.specification.version > 1.4              -->
  <!--                        [1.5] else [1.4]                              -->
  <!--                                                                      -->
  <!-- If you wish to use Jikes to compile JSP pages:                       -->
  <!--   Please see the "Using Jikes" section of the Jasper-HowTo           -->
  <!--   page in the Tomcat documentation.                                  -->

    <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>


  <!-- NOTE: An SSI Filter is also available as an alternative SSI          -->
  <!-- implementation. Use either the Servlet or the Filter but NOT both.   -->
  <!--                                                                      -->
  <!-- Server Side Includes processing servlet, which processes SSI         -->
  <!-- directives in HTML pages consistent with similar support in web      -->
  <!-- servers like Apache.  Traditionally, this servlet is mapped to the   -->
  <!-- URL pattern "*.shtml".  This servlet supports the following          -->
  <!-- initialization parameters (default values are in square brackets):   -->
  <!--                                                                      -->
  <!--   buffered            Should output from this servlet be buffered?   -->
  <!--                       (0=false, 1=true)  [0]                         -->
  <!--                                                                      -->
  <!--   debug               Debugging detail level for messages logged     -->
  <!--                       by this servlet.  [0]                          -->
  <!--                                                                      -->
  <!--   expires             The number of seconds before a page with SSI   -->
  <!--                       directives will expire.  [No default]          -->
  <!--                                                                      -->
  <!--   isVirtualWebappRelative                                            -->
  <!--                       Should "virtual" paths be interpreted as       -->
  <!--                       relative to the context root, instead of       -->
  <!--                       the server root?  (0=false, 1=true) [0]        -->
  <!--                                                                      -->
  <!--   inputEncoding       The encoding to assume for SSI resources if    -->
  <!--                       one is not available from the resource.        -->
  <!--                       [Platform default]                             -->
  <!--                                                                      -->
  <!--   outputEncoding      The encoding to use for the page that results  -->
  <!--                       from the SSI processing. [UTF-8]               -->
  <!--                                                                      -->
  <!--                                                                      -->
  <!-- IMPORTANT: To use the SSI servlet, you also need to rename the       -->
  <!--            $CATALINA_HOME/server/lib/servlets-ssi.renametojar file   -->
  <!--            to $CATALINA_HOME/server/lib/servlets-ssi.jar             -->

<!--
    <servlet>
        <servlet-name>ssi</servlet-name>
        <servlet-class>
          org.apache.catalina.ssi.SSIServlet
        </servlet-class>
        <init-param>
          <param-name>buffered</param-name>
          <param-value>1</param-value>
        </init-param>
        <init-param>
          <param-name>debug</param-name>
          <param-value>0</param-value>
        </init-param>
        <init-param>