TOMCAT Web. XML Finishing Instructions

Javaweb project, Web. XML for the basic configuration of the servlet:

We note that there is also a Web. xml file in Conf under Tomcat, and yes, all of the Javaweb projects are inherited from Web. XML from the server.

Take a look at this web. xml:

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2. <? XML version= "1.0" encoding="iso-8859-1"?>
6. <Web-app xmlns="Http://java.sun.com/xml/ns/javaee"
8. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
10. xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee
12. Http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd "
14. version="3.0">
16. <servlet>
18. <servlet-name>default</servlet-name>
20. <servlet-class>org.apache.catalina.servlets.defaultservlet</servlet-class >
22. <init-param>
24. <param-name>debug</param-name>
26. <param-value>0</param-value>
28. </init-param>
30. <init-param>
32. <param-name>listings</param-name>
34. <param-value>false</param-value>
36. </init-param>
38. <load-on-startup>1</load-on-startup>
40. </servlet>
44. <servlet>
46. <servlet-name>jsp</servlet-name>
48. <servlet-class>org.apache.jasper.servlet.jspservlet</servlet-class>
50. <init-param>
52. <param-name>fork</param-name>
54. <param-value>false</param-value>
56. </init-param>
58. <init-param>
60. <param-name>xpoweredby</param-name>
62. <param-value>false</param-value>
64. </init-param>
66. <load-on-startup>3</load-on-startup>
68. </servlet>
72. <servlet-mapping>
74. <servlet-name>default</servlet-name>
76. <url-pattern>/</url-pattern>
78. </servlet-mapping>
82. <servlet-mapping>
84. <servlet-name>jsp</servlet-name>
86. <url-pattern>*.jsp</url-pattern>
88. <url-pattern>*.jspx</url-pattern>
90. </servlet-mapping>
94. <session-config>
96. <session-timeout>30</session-timeout>
98. </session-config>
102. <!--This omits the definition of a MIME type of about 4,000 lines, giving only two definitions of MIME types- -
104. <mime-mapping>
106. <extension>bmp</extension>
108. <mime-type>image/bmp</mime-type>
110. </mime-mapping>
112. <mime-mapping>
114. <extension>htm</extension>
116. <mime-type>text/html</mime-type>
118. </mime-mapping>
122. <welcome-file-list>
124. <welcome-file>index.html</welcome-file>
126. <welcome-file>index.htm</welcome-file>
128. <welcome-file>index.jsp</welcome-file>
130. </welcome-file-list>
132. </Web-app>

And after we have created a servlet, we need to configure the following basic content:

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2. <servlet>
4. <servlet-name>servlet name (self-starting, do not repeat)</servlet-name>
6. <servlet-class>servlet class Path (xx.xx.xx.xxservlet)</servlet-class>
8. </servlet>
10. <servlet-mapping>
12. <servlet-name>servlet name (same as above)</servlet-name>
14. <url-pattern>/url name (own, do not repeat, note/, can not be lost)</url-pattern>
16. </servlet-mapping>

The result is that a servlet class and URL path are bound together, meaning that our access to the/url name is actually accessing a servlet class;

In fact, the configuration of some development tools will be automatically configured, but we still need to understand, sometimes we need to match, or when you want to change.

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TOMCAT Web. XML Finishing Instructions