//今天是新公司的第一天，说是要搞培训，写了个xml的解析程序。。。

package com.kaitong.xml;


import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;


import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;


public class MyXMLPrase {
	public static void main(String[] args) throws Exception{
		//首先定义一个List格式的数据
		String filePath="d:/kaitong.xml";
		List<Map<String,String>> list=saxReader(filePath);
		print(list);
		
		System.out.println("1.按照for循环删除   2.按照迭代删除");
		int chance=System.in.read()-48;
		
		if(1==chance){
			deleteByfor(list);
		}else if(2==chance){
			deleteByIterator(list);
		}else{
			System.out.println("您输入的参数有误...");
			return;
		}
		
		print(list);
	}
	
	//解析对应的xml文件
	public static List<Map<String,String>> saxReader(String filePath){
		File xmlFile = new File(filePath);  
	    FileInputStream fis = null;  
        try {  
            fis = new FileInputStream(xmlFile);  
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
            System.err.println("File is not exsit!");  
        }  
	          
	    SAXReader saxReader = new SAXReader(); 
	    List rowList=null;
	    List<Map<String,String>> resultList = new ArrayList<Map<String,String>>(); 
	    
        try {  
            //生成文档对应实体  
            Document doc = saxReader.read(fis);  
            //获取指定路径下的元素列表,这里指获取所有的data下的row元素  
            rowList = doc.selectNodes("//xml-body/line");  
        
            Iterator iterator=rowList.iterator();
            
            while(iterator.hasNext()){
            	Map<String,String> nodeMap=new HashMap<String,String>();
            	Element element = (Element)iterator.next();  
            	
            	//获取line元素的所有属性列表   
                List elementList = element.elements();  


                Iterator child=elementList.iterator();
                
                while(child.hasNext()){
                	 //将每个属性转化为一个抽象属性，然后获取其名字和值   
                	Element aa=(Element) child.next();
                	nodeMap.put(aa.getName(),element.elementText(aa.getName()));
                }
            	resultList.add((HashMap<String,String>) nodeMap);
            }
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        
        return resultList;
	}
	
	//打印对应的集合
	public static void print(List<Map<String,String>> list){
		int size=list.size();
		System.out.println("list集合的大小为:"+size);
		
		for(int i=0;i<size;i++){
			Map<String,String> map=list.get(i);
			for (String key : map.keySet()) {
				System.out.println("key= "+ key + " and value= " + map.get(key));
			}
			System.out.println();
		}
	}
	
	//删除元素通过for循环
	public static void deleteByfor(List<Map<String,String>> list){
		int size=list.size();
		for(int i=0;i<size-1;i++){
			list.remove(0);
		}
	}
	
	//删除元素通过迭代方式
	public static void deleteByIterator(List<Map<String,String>> list){
		int size=list.size();
		int i=0;
		Iterator it=list.iterator();
		while(it.hasNext()){
			if(++ i == size){
				break;
			}else{
				it.next();
				it.remove();
			}
		}
	}
}