Tomcat Usage Tips

1 Add a virtual directory

Add in Server.xml file

<context path= "/oicq" docbase= "myweb" debug= "0" reloadable= "true" ></Context>

MyWeb shows that its relative WebApps position is the catalogue of physical existence;

/oicq describes the path to its relative web URL, which is a virtual path, such as: Http://localhost/oicq

2 Configuring the server's ports

In line 56th of the standard server.xml file, modify port = "8080" For the port number you wish to use, such as: 80

3 Web.xml File Settings

Settings for default (welcome) files

The,<welcome-file-list> in H:omcat4confweb.xml is the same as the default file in IIS.

<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

Settings for an error file

<error-page>
<error-code>404</error-code>
<location>/notFileFound.jsp</location>
</error-page>
<error-page>
<exception-type>java.lang.NullPointerException</exception-type>
<location>/null.jsp</location>
</error-page>

If a file resource is not found, the server will report 404 errors, and the above configuration will call H:omcatwebappsroot otfilefound.jsp.

If a JSP file is executed that produces nullpointexception, the H:omcat4webappsroot ull.jsp is invoked

A typical JSP error page should be written like this:

<%@ page isErrorPage=”true”%>
出错了：<p> 错误信息: <%= exception.getMessage() %></p>

Stack Trace is:

<font color="red">
<%
java.io.CharArrayWriter cw = new java.io.CharArrayWriter();
java.io.PrintWriter pw = new java.io.PrintWriter(cw,true);
exception.printStackTrace(pw);
out.println(cw.toString());
%>
</font>

Settings for session timeout

Set the expiration time of the session, in minutes;

<session-config>
<session-timeout>30</session-timeout>
</session-config>

Settings for filters

<filter>
<filter-name>FilterSource</filter-name>
<filter-class>project4. FilterSource </filter-class>
</filter>
<filter-mapping>
<filter-name>FilterSource</filter-name>
<url-pattern>/WwwServlet</url-pattern>
(<url-pattern>/haha/*</url-pattern>)
</filter-mapping>

Filter:

1) Authentication Filter Authentication Filters

2 log and audit filtering logging and auditing Filters

3 Image Transformation Filter image conversion Filters

4 data compression filtering compression Filters

5) encryption Filter Encryption Filters

6) tokenizing Filters

7) Resource access event-triggered filtering filters that trigger resource access events XSL/T filtering xsl/t filters

9 Content Type Filter Mime-type chain filter attention to the order of listeners, such as: first safe filtering, then resources, and then content type, this order can be set itself.