Java to write your own webserver (a)

Reflection Reflection: The various structures (methods, properties, constructors, class name) Java class mapped to one Java object. Technique using reflection of a class can be dissected, reflecting frame design is the soul

@ Reflection: the various structures (methods, properties, constructors, type) java class java object mapped to one 
public class ReflecTest { 
	public static void main (String [] args) throws a ClassNotFoundException, an InstantiationException is, IllegalAccessException, an IllegalArgumentException , a InvocationTargetException, a NoSuchMethodException, a SecurityException { 
		// three methods 
		. @ 1 Object .getClass () 
		iphone iphone iPhone new new = (); 
		class iphone.getClass CLZ = (); 
		// class 2 .class 
		CLZ = Iphone.class ; 
		//3.Class.forName ( "package name type.") 
		CLZ = Class.forName ( "server.basic.Iphone"); 
		
		// create the object 
		Iphone iphone2 = (Iphone) clz.newInstance (); 
		System.out .println (iphone2-); 
		 
		Iphone iphone3 = (Iphone) clz.getConstructor () the newInstance ().; 
		System.out.println (iphone3); 
	} 

} 
class {Iphone
	public Iphone(){
		
	}
}

　　

XML: Extensible Markup Language, Extensible Markup Language, as a storage format to store data or parameters for the software, the program parses the configuration file, you can reach the destination without modifying the code will be able to change the program.

 

java.io.IOException Import; 

Import javax.xml.parsers.ParserConfigurationException; 
Import javax.xml.parsers.SAXParser; 
Import the javax.xml.parsers.SAXParserFactory; 
Import the org.xml.sax.Attributes; 
Import in org.xml.sax. a SAXException; 
Import org.xml.sax.helpers.DefaultHandler; 

public class XMLTest in { 
	public static void main (String [] args) throws a ParserConfigurationException, a SAXException, IOException { 
		// parse the SAX 
		// 1, for acquiring and analyzing plant 
		SAXParserFactory factory = SAXParserFactory. the newInstance (); 
		// 2, acquired from the parser parses the factory 
		the SAXParser = factory.newSAXParser the parse (); 
		//. 3, the document is loaded document registration processor 
		PersonHandler handler = new PersonHandler (); 
		//. 4, the preparation of the processor
		parse.parse(Thread.currentThread().getContextClassLoader().getResourceAsStream("server/basic/p.xml"), handler);

	}
}

class PersonHandler extends DefaultHandler {
	@Override
	public void startDocument() throws SAXException {
		System.out.println("---解析文档开始---");
	}

	@Override
	public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
		System.out.println(qName + "--->解析开始");
	}

	@Override
	public void characters(char[] ch, int start, int length) throws SAXException {
		String contents = new String(ch, start, length).trim();
		if (contents.length() > 0) {
			System.out.println ( "content:" + Contents); 
		}else{
			System.out.println ( "content ->" + "empty"); 
		} 
	} 

	@Override 
	public void the endElement (String URI, the localName String, String the qName) a SAXException {throws 
		System.out.println (the qName + "---> end parsing"); 
	} 

	@Override 
	public void the endDocument () throws a SAXException { 
		System.out.println ( "---- --- end parse the document" ); 
	} 
}