XML file parsing

Catalog

One .Java Three configuration locations and reading methods of configuration files in

 1. Same bag

 2. The root path

 3.WIN-INF Safe path

  Two .dom4j The common method of

3、 ... and . analysis XML file  

One .Java Three configuration locations and reading methods of configuration files in

 1. Same bag

  Class name .class.getResourceAsStream(" File name ")

 2. The root path

  Class name .class.getResourceAsStream("/ File name ")

 3.WIN-INF Safe path

  context.getResourceAsStream("/WIN-INF/ File path ")

  Two .dom4j The common method of

• selecNodes： Get the element

• selectSingleNode： Get a single element

• getRootElement()： Get the root element

• attributeValue： Only elements can click this method to get values

• getText： Get the element text

3、 ... and . analysis XML file  

• Let's configure the location and read xml When configuring a file , You need to put these below the picture jar Package import .
• 
• xml file

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE config[
	<!ELEMENT config (action*)>
	<!ELEMENT action (forward*)>
	<!ELEMENT forward EMPTY>
	<!ATTLIST action
	  path CDATA #REQUIRED
	  type CDATA #REQUIRED
	>
	<!ATTLIST forward
	  name CDATA #REQUIRED
	  path CDATA #REQUIRED
	  redirect (true|false) "false"
	>
]>
<config>
	<action path="/studentAction" type="org.lisen.mvc.action.StudentAction">
		<forward name="students" path="/students/studentList.jsp" redirect="false"/>
	</action>
	
	<action path="/bookAction" type="org.lisen.mvc.action.bookAction">
		<forward name="books" path="/books/bookList.jsp" redirect="false"/>
	</action>
</config>

• analysis xml File operations

• package com.yjx.test;
  
  import java.io.InputStream;
  import java.util.Iterator;
  import java.util.List;
  
  import org.dom4j.Attribute;
  import org.dom4j.Document;
  import org.dom4j.DocumentException;
  import org.dom4j.Element;
  import org.dom4j.io.SAXReader;
  
  public class XmlRead {
  	
  	public static void main(String[] args) throws Exception {
  		
  		// Read xml file 
  		InputStream in=XmlRead.class.getResourceAsStream("config.xml");
  		SAXReader reads=new SAXReader();
  		// Read the file to get a document 
  		Document doc=reads.read(in);
  		
  		// Get the element 
  	    Element el=doc.getRootElement();
  	    
  	    // Get action The node 
  	    List<Element> action=el.selectNodes("action");
  	    
  	    for (Element e : action) {
  			// Get action Elemental 
  	    	String path=e.attributeValue("path");
  	    	String type=e.attributeValue("type");
  	    	System.out.println(path);
  	    	System.out.println(type);
  	    	
  	    	
  	    	// In the access to action Next node forward
  	         List<Element> forward=e.selectNodes("forward");
  	        for(Element f:forward) {
  	        	// Get forward Properties of a node 
  	          String name=f.attributeValue("name");
  	          String path01=f.attributeValue("path");
  	          String redirect=f.attributeValue("redirect");
  	          
  	          System.out.println(name);
  	          System.out.println(path01);
  	          System.out.println(redirect);
  	          
  	        }
  		}
  		
  	}
  	
  
  }
  

  That's all for today's study ！！！