parser.java

神经网络源代码,实现了一个BP神经网络,可以完成基于BP的神经网络算法.

package net.openai.ai.nn.parser;

import java.io.*;
import org.w3c.dom.*;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.DocumentBuilder;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

public class Parser {

    private File configFile = null;
    private int tabCount = 0;

    public Parser() {

    }

    public Parser(File configFile) {
	this();
	this.configFile = configFile;
    }

    public void setConfigFile(File configFile) {
	this.configFile = configFile;
    }
  
    public File getConfigFile() {
	return configFile;
    }
    
    public void loadConfiguration() {
	Document doc;
	try {
	    DocumentBuilderFactory docBuilderFactory 
		= DocumentBuilderFactory.newInstance();
	    DocumentBuilder docBuilder 
		= docBuilderFactory.newDocumentBuilder();
	    doc = docBuilder.parse(configFile);
	    printDocument(doc);
	} catch (SAXParseException err) {
            System.out.println ("** Parsing error" 
                + ", line " + err.getLineNumber ()
                + ", uri " + err.getSystemId ());
            System.out.println("   " + err.getMessage ());
            // print stack trace as below

        } catch (SAXException e) {
            Exception x = e.getException();
            ((x == null) ? e : x).printStackTrace ();
        } catch (Throwable t) {
            t.printStackTrace ();
        }
    }

    public void printDocument(Document doc) {
	Element element = doc.getDocumentElement();
	printNode((Node) element);
    }

    public void printNode(Node node) {
	if(node == null)
	    return;
	Node nextNode = null;
	if(!node.getNodeName().equals("#text")) {
	    for(int i = 0; i < tabCount; i++) {
		System.err.print("\t");
	    }
	    System.err.println(node.getNodeName());
	}
	if(node.hasChildNodes()) {
	    tabCount++;
	    NodeList children = node.getChildNodes();
	    for(int i = 0; i < children.getLength(); i++) {
		nextNode = (Node) children.item(i);
		printNode(nextNode);
	    }
	    tabCount--;
	} 
    }

    public static void main(String[] args) {
// 	try {
// 	    new Parser(new File(args[0]));
// 	} catch (FileNotFoundException fnfe) {
// 	    System.err.println("No setup file passed as an argument.");
// 	}
	Parser parser = new Parser(new File(args[0].trim()));
	parser.loadConfiguration();
    }

}