XML的理解以及SAX解析流程

XML一般用来存储数据作为数据存储的一种格式

XML还可以用于作为软件的参数配置

这里讲下如何理解java中的相对路径

在java中如何获取当前的路径，当我们知道当前的路径了以后我们就可以使用绝对路径了

<code>
package
 cn.jd.server.basic;

import
 java.io.IOException;

import
 javax.xml.parsers.ParserConfigurationException;
import
 javax.xml.parsers.SAXParser;
import
 javax.xml.parsers.SAXParserFactory;

import
 org.xml.sax.Attributes;
import
 org.xml.sax.SAXException;
import
 org.xml.sax.helpers.DefaultHandler;

 
public
 
class
 
XmlTest01
 
{
		
public
 
static
 
void
 
main
(String[] args)
 
throws
 ParserConfigurationException, SAXException, IOException 
{
			System.out.println();
			 
			 
			SAXParserFactory factory=SAXParserFactory.newInstance();
			 
			SAXParser  parse=factory.newSAXParser();  
			 
			 
			PHandler  handler=
new
 PHandler();
			 
			parse.parse(Thread.currentThread().getContextClassLoader()
					.getResourceAsStream(
"cn/jd/server/basic/p.xml"
),handler);
		}
}
class
 
PHandler
  
extends
 
DefaultHandler
{
	 
	
public
 
void
 
startDocument
()
 
throws
 SAXException 
{
		System.out.println(
"解析文档开始"
);
	}
	 
	
public
 
void
 
startElement
(String uri, String localName, String qName, Attributes attributes)
 
throws
 SAXException 
{
		System.out.println(qName+
"-->解析开始"
);
	}
	 
	
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(
"内容为:"
+contents);
		}
else
 {
			System.out.println(
"空内容"
);
		}
	}
	 
	
public
 
void
 
endElement
(String uri, String localName, String qName)
 
throws
 SAXException 
{
		System.out.println(qName+
"-->解析结束"
);
	}
	 
	
public
 
void
 
endDocument
()
 
throws
 SAXException 
{
		System.out.println(
"解析文档结束"
);
	}
}

/<code>

<code> 
<
persons
>

	
<
person
>

	
<
name
>
至尊宝
name
>

	
<
age
>
9000
age
>

	
person
>

	
<
person
>

	
<
name
>
白晶晶
name
>

	
<
age
>
7000
age
>

	
person
>

persons
>
/<code>