Go语言视频零基础入门到精通

javalearner

这是jdom-b10中的例子程序。
import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Iterator;
import java.util.List;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;

/** *

1. WarReader

复制代码

demonstrates how to
       * read a Servlet 2.2 Web ArcHive file with JDOM.
  * * * @author Brett McLaughlin, Jason Hunter
       * @version 1.0 */
  
   
   
   

   
  

1. 
   
2. public class WarReader {
   
3.    
   
4.   public static void main(String[] args) throws IOException, JDOMException {
   
5.     if (args.length != 1) {
   
6.       System.err.println("Usage: samples.WarReader [web.xml]");
   
7.       return;
   
8.     }
   
9.     String filename = args[0];
   
10.     PrintStream out = System.out;
    
11.     SAXBuilder builder = new SAXBuilder();
    
12.     Document doc = builder.build(new File(filename));
    
13.     // Get the root element
    
14.     Element root = doc.getRootElement();
    
15.     // Print servlet information
    
16.     List servlets = root.getChildren("servlet");
    
17.     out.println("This WAR has "+ servlets.size() +" registered servlets:");
    
18.     Iterator i = servlets.iterator();
    
19.     while (i.hasNext()) {
    
20.       Element servlet = (Element) i.next();
    
21.       out.print("        " + servlet.getChild("servlet-name")
    
22.                               .getTextTrim() +
    
23.                 " for " + servlet.getChild("servlet-class")
    
24.                                  .getTextTrim());
    
25.       List initParams = servlet.getChildren("init-param");
    
26.       out.println(" (it has " + initParams.size() + " init params)");
    
27.     }
    
28.     // Print security role information
    
29.     List securityRoles = root.getChildren("security-role");
    
30.     if (securityRoles.size() == 0) {
    
31.       out.println("This WAR contains no roles");
    
32.     }
    
33.     else {
    
34.       Element securityRole = (Element) securityRoles.get(0);
    
35.       List roleNames = securityRole.getChildren("role-name");
    
36.       out.println("This WAR contains " + roleNames.size() + " roles:");
    
37.       i = roleNames.iterator();
    
38.       while (i.hasNext()) {
    
39.         Element e = (Element) i.next();
    
40.         out.println("        " + e.getTextTrim());
    
41.       }
    
42.     }
    
43.         
    
44.     // Print distributed information (notice this is out of order)
    
45.     List distrib = root.getChildren("distributed");
    
46.     if (distrib.size() == 0) {
    
47.       out.println("This WAR is not distributed");
    
48.     } else {
    
49.       out.println("This WAR is distributed");
    
50.     }        
    
51.   }
    
52. }
    

复制代码

程序运行结果： C:java>java WarReader web.xml
This WAR has 2 registered servlets:
snoop for SnoopServlet (it has 0 init params)
file for ViewFile (it has 1 init params)
This WAR contains 3 roles:
manager
director
president
This WAR is distributed C:java> 附：web.xml: <?xml version="1.0" encoding="ISO-8859-1"?> <!--
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
"http://java.sun.com/j2ee/dtds/web-app_2.2.dtd">
--> <web-app>
  <servlet>
   <servlet-name> snoop</servlet-name>
   <servlet-class> SnoopServlet</servlet-class>
</servlet>

<servlet>
  <servlet-name> file</servlet-name>
  <servlet-class> ViewFile</servlet-class>
  <init-param>
    <param-name> initial</param-name>
    <param-value> 1000</param-value>
    <description> The initial value for the counter <!-- optional --> </description>
   </init-param>
</servlet>

<servlet-mapping>
   <servlet-name> mv</servlet-name>
   <url-pattern> *.wm</url-pattern>
</servlet-mapping>  <distributed/>  <security-role>
  <role-name> manager</role-name>
  <role-name> director</role-name>
  <role-name> president</role-name>
</security-role>
  </web-app>