读写XML文件

XMLClass.java

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.output.XMLOutputter;

public class XMLClass
{
 XMLClass()
 {
  
 }
 public String[] getIPbyArray(String strPath)
 {
  //strPath = "a.xml";
  FileInputStream fi = null;
  try
  {
   fi = new FileInputStream(strPath);
  }
  catch (IOException e)
  {
   // do nothing
  }

  SAXBuilder saxBuiler = new SAXBuilder();

  Document doc = null;
  try
  {
   doc = saxBuiler.build(fi);
  }
  catch (JDOMException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

  Element root = doc.getRootElement();
  List leaves = root.getChildren();
  //String[] arrayIP = {"10.40.109.1" ,"10.40.109.1","10.40.109.1","10.40.109.1","10.40.109.1"};
  String[] arrayIP =new String[5];
  int numIP = leaves.size();
  for(int i= 0; i< numIP; i++)
  {
   Element child = (Element)leaves.get(i);
   
   arrayIP[i] = child.getAttributeValue("id");
   
   System.out.println(arrayIP[i] );
   
  }
  return arrayIP;
 }
 
 public ArrayList getIPbyArrayList(String strPath)
 {
  //strPath = "a.xml";
  FileInputStream fi = null;
  try
  {
   fi = new FileInputStream(strPath);
  }
  catch (IOException e)
  {
   // do nothing
  }

  SAXBuilder saxBuiler = new SAXBuilder();

  Document doc = null;
  try
  {
   doc = saxBuiler.build(fi);
  }
  catch (JDOMException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

  Element root = doc.getRootElement();
  List leaves = root.getChildren();
  //String[] arrayIP = {"10.40.109.1" ,"10.40.109.1","10.40.109.1","10.40.109.1","10.40.109.1"};
  ArrayList ipList  =new ArrayList();
  int numIP = leaves.size();
  for(int i= 0; i< numIP; i++)
  {
   Element child = (Element)leaves.get(i);
   
   ipList.add(child.getAttributeValue("id"));
   
   System.out.println(child.getAttributeValue("id"));
   
  }
  return ipList;
 }

    public void writeXml(String[] strArray , String strPath)
    {

  XMLOutputter xmlOut = new XMLOutputter();
  FileOutputStream fileOutputStream = null;

        Element root = new Element("list");   
          
       // 根节点添加到文档中；   
        Document doc = new Document(root);   
    
       // 此处 for 循环可替换成 遍历 数据库表的结果集操作;
        int size = strArray.length;
       for (int i = 0; i < size; i++)
       {                  
           // 创建节点 user;   
           Element elements = new Element("user");                
           // 给 user 节点添加属性 id;   
           elements.setAttribute("id", ""+strArray[i]);                  
           // 给 user 节点添加子节点并赋值；     
//           elements.addContent(new Element("IP"+i).setText("xuehui"));  
//           elements.addContent(new Element("age").setText("28"));  
//           elements.addContent(new Element("sex").setText("Male"));      
           // 给父节点list添加user子节点;  
           root.addContent(elements);   
       }  
  try
  {
    fileOutputStream = new FileOutputStream(strPath);
  }
  catch (FileNotFoundException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  //OutputStream fileOutputStream;
  try
  {
   xmlOut.output(doc, fileOutputStream);
  }
  catch (IOException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
    public void writeXml(ArrayList ipList , String strPath)
    {

  XMLOutputter xmlOut = new XMLOutputter();
  FileOutputStream fileOutputStream = null;

        Element root = new Element("list");   
          
       // 根节点添加到文档中；   
        Document doc = new Document(root);   
    
       // 此处 for 循环可替换成 遍历 数据库表的结果集操作;
        int size = ipList.size();
       for (int i = 0; i < size; i++)
       {                  
           // 创建节点 user;   
           Element elements = new Element("user");                
           // 给 user 节点添加属性 id;   
           elements.setAttribute("id", ""+ipList.get(i));                  
           // 给 user 节点添加子节点并赋值；     
//           elements.addContent(new Element("IP"+i).setText("xuehui"));  
//           elements.addContent(new Element("age").setText("28"));  
//           elements.addContent(new Element("sex").setText("Male"));      
           // 给父节点list添加user子节点;  
           root.addContent(elements);   
       }  
  try
  {
    fileOutputStream = new FileOutputStream(strPath);
  }
  catch (FileNotFoundException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  //OutputStream fileOutputStream;
  try
  {
   xmlOut.output(doc, fileOutputStream);
  }
  catch (IOException e)
  {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
   
    public static void main(String[] args)
    { 
     String[] arrayIP = {"10.40.109.1" ,"10.40.109.1","10.40.109.1","10.40.109.1","10.40.109.1"};
        try
        {  
         XMLClass xmlClass = new XMLClass();
            System.out.println("生成 mxl 文件...");  
            xmlClass.writeXml(arrayIP,"user.xml");          
            xmlClass.getIPbyArrayList("user.xml");
            System.out.println("生成 mxl 文件end..."); 
        }
        catch (Exception e)
        {  
            e.printStackTrace();  
        }  
     }  

 

}

 

 

/*************************显示界面MainFrame.java***********************************************

 

 

 

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.List;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import javax.swing.WindowConstants;

public class MainFrame extends JFrame
{
 MainFrame()
 {
  JFrame frame = new JFrame("测试界面");
  Container container = frame.getContentPane();
  JLabel lable = new JLabel("IP地址");
  lable.setHorizontalAlignment(SwingConstants.CENTER);
     final JComboBox comboxIPforWrite = new JComboBox();
    // JComboBox comboxIPforWrite = new JComboBox();
     JComboBox comboxIPforShow= new JComboBox();
  comboxIPforWrite.setEditable(true);
  JButton button = new JButton();
  button.addActionListener(new ActionListener()
  {

   public void actionPerformed(ActionEvent e)
   {
    // TODO Auto-generated method stub
    int numItem = comboxIPforWrite.getItemCount();
    ArrayList listIP = new ArrayList();
    for(int i =0 ;i<numItem; i++)
    {
     listIP.add((String) comboxIPforWrite.getItemAt(i));
     //listIP
     XMLClass xmlClass = new XMLClass();
     xmlClass.writeXml(listIP, "user.xml");
    }
    
    
   }
   
  });
  
  
  //for()
  
  /*
   * 窗体放置的控件内容
   */
  
  JPanel panelMain = new JPanel();
  panelMain.setLayout(new BorderLayout());
  
  JPanel panelIP = new JPanel();
  panelIP.setLayout(new GridBagLayout());
  panelIP.add(lable, new GridBagConstraints(0,0,1,1,100,100,GridBagConstraints.CENTER,GridBagConstraints.BOTH , new Insets(0, 0, 0 ,0),0, 0 ));
  panelIP.add(comboxIPforWrite, new GridBagConstraints(1,0,1,1,100,100,GridBagConstraints.CENTER,GridBagConstraints.BOTH , new Insets(0, 0, 0 ,0),0, 0 ));
  panelMain.add(panelIP ,BorderLayout.NORTH);
  //panelMain.setSize(new Dimension(61,39));
  
  comboxIPforShow = beforeShow(comboxIPforShow);
  /*
   * 窗体放置的控件内容
   */
  container.add(panelMain);
  frame.setVisible(true);
  frame.setSize(618,382);
  frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 
 } 
 private JComboBox beforeShow(JComboBox comboxIPforWrite)
 {
  int numItem = comboxIPforWrite.getItemCount();
  ArrayList listIP = new ArrayList();
  XMLClass xmlClass = new XMLClass();
  listIP = xmlClass.getIPbyArrayList("user.xml");
  for(int i =0 ;i<numItem; i++)
  {
   //listIP.add((String) comboxIPforWrite.getItemAt(i));
   //listIP
   comboxIPforWrite.addItem(listIP.get(i));
  
  }
  return comboxIPforWrite;
  
 }
 public static void main (String[] args)
 {
  MainFrame mainFrame = new MainFrame();
  
 }

}