Java XML读写实例-优快云博客

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[] getIPArray(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("IP");

   System.out.println(arrayIP[i] );

  }
  return arrayIP;
}

public ArrayList getIPArrayList(String strPath)
{
  //strPath = "a.xml";
  FileInputStream fi = null;
  try
  {
   fi = new FileInputStream(strPath);
  }
  catch (IOException e)
  {
   // do nothing
  }

SAXBuilder saxBuiler = new SAXBuilder();

  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-1; i++)
       {
           // 创建节点 user;
           Element elements = new Element("Record");
           // 给 user 节点添加属性 id;
           elements.setAttribute("IP", ""+strArray[i][0]);
           elements.setAttribute("LastLoginTime", ""+strArray[i][1]);
           // 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" ,"1101071921"},
//       {"10.40.109.2","1101071922"},
//       {"10.40.109.3","1101071922"},
//       { "10.40.109.4","1101071923"},
//       {"10.40.109.5","1101071924"}
//    };
//        try
//        {
//        XMLClass xmlClass = new XMLClass();
//            System.out.println("生成 mxl 文件...");
//            xmlClass.writeXml(arrayIP,"user.xml");
//            xmlClass.getIPArrayList("user.xml");
//            System.out.println("生成 mxl 文件end...");
//        }
//        catch (Exception e)
//        {
//            e.printStackTrace();
//        }
        try
        {
        String strPath = "user.xml";
        XMLClass xmlClass = new XMLClass();
            System.out.println("生成 mxl 文件...");
            xmlClass.getIPArray(strPath);
            xmlClass.getIPArrayList("user.xml");
            System.out.println("生成 mxl 文件end...");
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
     }

}

XML读取