j2ee 解析

package com.jmh.xx2;

import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;


public class Demo {
	public static void main(String[] args) throws IOException {
		//同包
		InputStream is = Demo.class.getResourceAsStream("db.properties");
		//根目录
		//InputStream is = Demo.class.getResourceAsStream("/db.properties");
        //与xml文件同包下:思路
        //在安全目录下 名为安全必须不能直接访问
        //必须在servlet里面进行操作
        //解析安全文件
		//拿到上下文
		//InputStream resourceAsStream =     
        //req.getServletContext().getResourceAsStream("WEB-                
        //INF/lib/db.properties");
		//开始解析
		//Properties p=new Properties();
		//p.load(resourceAsStream);
		//System.out.println(p.getProperty("uname"));
		//开始解析
		Properties p=new Properties();
		p.load(is);
		System.out.println(p.getProperty("uname"));
	}
}

package com.jmh.xx2;

import java.io.InputStream;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

public class Demo02 {
//private static final Node Element = null;

public static void main(String[] args) throws DocumentException {
	//获取io流
	InputStream xs = Demo02.class.getResourceAsStream("students.xml");
	//获取读取器对象
	SAXReader sa=new SAXReader();
	//获取配置文件 对象
	Document read = sa.read(xs);
	//使用xpath解析 节点
	List selectNodes = read.selectNodes("/students/student");
	//遍历
	for (Node node : selectNodes) {
		//获取name文本的信息
		Node se = node.selectSingleNode("name");
		String text = se.getText();
		System.out.println(text);
		//没有属性值 转成对象 获取值
		org.dom4j.Element ele = (org.dom4j.Element)node;
		String sid = ele.attributeValue("sid");
		System.out.println(sid);
	}
}
}

package com.jmh.xx2;

import java.io.InputStream;
import java.util.List;
import org.dom4j.Element;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

public class Demo03 {
//private static final Node Element = null;

public static void main(String[] args) throws DocumentException {
	//获取io流
	InputStream xs = Demo03.class.getResourceAsStream("students.xml");
	//获取读取器对象
	SAXReader sa=new SAXReader();
	//获取配置文件 对象
	Document read = sa.read(xs);
	//使用xpath解析 节点
	
	//拿到所有节点
	//使用xpath解析节点 包含
	//List selectNodes = read.selectNodes("/
public class Demo04 {
	public static void main(String[] args) throws DocumentException {
		//获取io流
		InputStream res = Demo04.class.getResourceAsStream("hibernate.cfg.xml");
		//System.out.println(res);
		//获取读取器
		SAXReader sax=new SAXReader();
		//获取配置文件 对象
		Document read = sax.read(res);
		//开始解析
		List selectNodes = read.selectNodes("/hibernate-configuration/session-factory");
		//开始遍历
		for (Node node : selectNodes) {
			//获取多个对象
			List selectNodes2 = node.selectNodes("property");
			//System.out.println(selectNodes2.size());
			//继续遍历
			for (Node node2 : selectNodes2) {
				System.out.println("纯值==="+node2.getText());
				//同时遍历Name属性
				Element ele=(Element)node2;
				String name = ele.attributeValue("name");
				System.out.println("name属性值===="+name);
			}
			//继续爬标签mapping
			List selectNodes3 = node.selectNodes("mapping");
			//继续遍历
			for (Node node3 : selectNodes3) {
				//System.out.println(node3.getText());
				//同时遍历Name属性
				Element ele=(Element)node3;
				String resource = ele.attributeValue("resource");
				System.out.println("resource属性值===="+resource);
			}
			
		}
	}
}

 hibernate.cfg.xml

	
		
		root
		root
		jdbc:mysql://localhost:3306/t207?useUnicode=true&characterEncoding=UTF-8
		com.mysql.jdbc.Driver
		org.hibernate.dialect.MySQLDialect
		
		true
		true

		
		true
		
		true
		
		org.hibernate.cache.ehcache.EhCacheRegionFactory
		
		
		
		
		
		
		
		
		
		
	
	

students.xml 

	
		小明
	
	
		小芳
	
	
		小王
	

db.properties 

uname=mybatis_ssm
upass=xiaoli
url=jdbc:mysql://localhost:3306/mybatis_ssm
driver_Class=com.mysql.jdbc.Driver

initPoolSize=5
maxPoolSize=20