從資料庫Mysql讀取資料轉化為xml文件的Java類

從資料庫Mysql讀取資料轉化為xml文件的Java類

IDE：Myeclipse6.0，資料庫MySql（MySql開發與管理工具：Navicat8.0for MySQL）；

一、建立資料檔案

二、建立連線資料庫的類DBConnection.java

package com.ychk;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;

 public class DBConnection
 {
  StringDriver="com.mysql.jdbc.Driver";
  StringUrl="jdbc:mysql://localhost:3306/xml";//xml為資料來源
  String Name="Mysql使用者名稱";
  StringPwd="Mysql密碼"; 
  
  public ConnectiongetConnection() throws SQLException, ClassNotFoundException
  { 
   Connectionconn=null;

   try
   {
    Class.forName(Driver);
    conn=DriverManager.getConnection(Url,Name,Pwd);
   }catch(Exception e)
   {
    e.printStackTrace();
   }
   returnconn;
  }
  
  public ResultSet sqlUser()throws SQLException, ClassNotFoundException{
   getConnection();
   Stringsql="select * from testxml";
   ResultSetrs=null;
   PreparedStatementps=null;
   Connectionconn=null;
   conn=DriverManager.getConnection(Url,Name,Pwd);
   ps =conn.prepareStatement(sql); 
   rs =ps.executeQuery(sql);
   returnrs;
  }
 }

三、建立建立xml檔案的Java類TestXml.java

package com.ychk;

import java.io.File;
import java.io.FileOutputStream;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class TestXml
{
   public staticvoid main(String[] args)
   {
    Listresult = new ArrayList();
    Stringline[]= null;
    try{
     DBConnectioncon=new DBConnection();
     ResultSetrs=con.sqlUser();
     while(rs.next())
     {
      line= new String[2];
      line[0]=rs.getString(1);
      line[1]=rs.getString(2);
      result.add(line);
     }
    DocumentBuilderFactoryfactory=DocumentBuilderFactory.newInstance();
    DocumentBuilderbuilder=factory.newDocumentBuilder();
    Documentdocument=builder.newDocument();//Creat xml document
    document.setXmlVersion("1.0");

    Elementroot=document.createElement_x("chart");//rootname of xmldocument
    document.appendChild(root);//creatroot of xml document
    for(intk=1;k<=result.size();k++)
    {
     root.appendChild(document.createElement_x("set"));//elementnameof xml document
    }
    NodeListnodeList=document.getElementsByTagName_r("set");  
    intsize=nodeList.getLength();
    for(intk=0;k<size;k++)
    {
     Nodenode=nodeList.item(k); 
     if(node.getNodeType()==Node.ELEMENT_NODE)
     {
      String[]temp = (String[])result.get(k);
      ElementelementNode=(Element)node;
      elementNode.appendChild(document.createElement_x("label")).appendChild(document.createTextNode(temp[0]));
      elementNode.appendChild(document.createElement_x("value")).appendChild(document.createTextNode(temp[1]));
     } 
    }

    TransformerFactorytransFactory=TransformerFactory.newInstance();
    Transformertransformer=transFactory.newTransformer();
    DOMSourcedomSource=new DOMSource(document);
    Filefile=new File("testxml.xml");//save xml document as url
    FileOutputStreamout=new FileOutputStream(file);
    StreamResultxmlResult=new StreamResult(out);
    transformer.transform(domSource,xmlResult);
      }
    catch(Exceptione)
    {
     System.out.println(e);
    }
   }

}

四、用瀏覽器開啟xml檔案效果如下：

五、如何實現如下效果：--正在改進，請各位指教！謝謝！