mailtree.java~66~

Mail Of Java

package mailofjava;
import javax.swing.*;
import java.awt.*;
import java.util.*;
import javax.swing.JTree;
import javax.swing.tree.*;
import javax.mail.*;
import javax.activation.*;
import java.util.EventObject.*;
import javax.swing.event.*;

/** 用于演示邮件文件夹的树形显示*/
public class MailTree extends JFrame{
 private int mailCount=0;
 MessageWrapper[] mw;
 private  JLabel jl = new JLabel("初始化状态");
 private  JEditorPane je = new JEditorPane();


  public MailTree() {
   Container ct;
   ct=this.getContentPane() ;
   ct.setLayout(new BorderLayout()) ;//布局


   CreateMessage cm=new CreateMessage(0);//readonly mode
   Message[] mymessages = cm.getMessage() ;//取得数据
   mailCount=mymessages.length ;//多少邮件
   mw = new MessageWrapper[mailCount];//开一个邮件数组类
   for(int i=0;i<mailCount;i++)
  {
     mw[i]= new MessageWrapper(mymessages[i]);//全部装入封装类
     mw[i].getMailContent() ;
     mw[i].getAttachMent() ;
  }
    run();
  }


  public void run(){

    DefaultMutableTreeNode top =   new DefaultMutableTreeNode("曾海的邮件根目录");
     createNodes(top);
     final JTree tree = new JTree(top);
     tree.getSelectionModel().setSelectionMode
        (TreeSelectionModel.SINGLE_TREE_SELECTION);//一次选一个哦

//Listen for when the selection changes.
tree.addTreeSelectionListener(new TreeSelectionListener() {
    public void valueChanged(TreeSelectionEvent e) {
        DefaultMutableTreeNode node = (DefaultMutableTreeNode)
                           tree.getLastSelectedPathComponent();//取得当前选择

        if (node == null) return;//没有选中什么破东西。

        Object nodeInfo = node.getUserObject();//取结点
        if(nodeInfo instanceof String) {
              jl.setText((String) nodeInfo );
              je.setText((String) nodeInfo );
        }
        if( (node.isLeaf())&&  (nodeInfo instanceof MessageWrapper )){
            MessageWrapper book = (MessageWrapper )nodeInfo;
            je.setText(book.toString() );
            jl.setText(book.getMail()  );


        } else {
            je.setText("当前不是叶结点" );
        }
    }
});


     JScrollPane treeView = new JScrollPane(tree);
     this.getContentPane().add(treeView,BorderLayout.CENTER );//顶部的东西

     JPanel jp1 =new JPanel();
     jp1.setLayout(new FlowLayout());
     JButton jb=new JButton("附件列表");


     jp1.add(jb);
     jp1.add(jl);
     this.getContentPane().add(jp1,BorderLayout.EAST );


     je.setText("文字在这里");
     JScrollPane jsp = new JScrollPane(je);

     this.getContentPane().add(jsp,BorderLayout.SOUTH );


  }//run

private void createNodes(DefaultMutableTreeNode top) {//top是根，然后。。。
      DefaultMutableTreeNode category = null;//分支结占
      DefaultMutableTreeNode book = null;//叶结点

      category = new DefaultMutableTreeNode( "收件箱");

     for(int k=0;k<mailCount;k++){
       book = new DefaultMutableTreeNode(mw[k]);
       category.add(book);
     }
     top.add(category);//第一层结束



      category = new DefaultMutableTreeNode("垃圾箱");
      top.add(category);

      book = new DefaultMutableTreeNode("你好！中国出口");
      category.add(book);

      book = new DefaultMutableTreeNode("天知道，垃圾邮件");
      category.add(book);
  }





  public static void main(String[] args) {
    MailTree mailTree1 = new MailTree();
    mailTree1.setTitle("这是邮件树演示");
    mailTree1.setSize(new Dimension(800,600));
    mailTree1.setVisible(true) ;
    mailTree1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
    mailTree1.show() ;
  }
}


class MessageWrapper{
  private Message msga;
  Stack attachmentList= new Stack();//存放附件名
  Stack attachmentTypeList = new Stack();//附件类型
   private String mailBody="";
  public MessageWrapper(Message aa){

    msga=aa;
  }//constructor
  public String toString(){
   try{
     Address addr[] = msga.getFrom();
     String myaddr= addr[0].toString() ;

    return "来自"+myaddr+"主题"+msga.getSubject() ;
   }catch(Exception e){ System.err.println("取邮件头失败"); e.printStackTrace();return("失败"); };
  }
  public String getMailContent(){

  try{
    if( msga.isMimeType("text/plain") )//纯文本直接返回字串
       return (String) msga.getContent();
    if( msga.isMimeType("multipart/*") )
    {
         Multipart mp= (Multipart) msga.getContent() ;
         int mpCount=mp.getCount() ;
         for(int h=0;h<mpCount;h++){
             Part pt = mp.getBodyPart(h) ;
             this.attachmentList.push(pt.getFileName() );
             this.attachmentTypeList.push(pt.getContentType() );

         }//for
         return "多部份邮件，请看附件表";
    }//if multipart
    else
      return "类型不定";


  }catch(Exception e){ e.printStackTrace(); return "取邮件意外" ;};

  }//get mail content

  public String getMail()
  {

   return mailBody;
  }

  public String getAttachMent(){
   String body="";
    while(! this.attachmentList.isEmpty() ) {
       body+= (String)  this.attachmentList.pop();
       body+="=="+(String) this.attachmentTypeList.pop();

    }//不空
    mailBody=body;
   return body;

  }


}