Javck學習筆記

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<?page title="new page title" contentType="text/html;charset=UTF-8"?>
<zk>
<window title="Upload Testing" border="normal" apply="javck.controller.UploadComposer">
<!-- 註一 -->
<button label="Upload" upload="true,maxsize=1024" id="btn_upload"/>
<menubar>
  <menu label="File">
    <menupopup>
<!-- 註二 -->
      <menuitem label="Upload" upload="true,maxsize=-1" id="mi_upload"/>
      <menuseparator />
      <menuitem label="Open" />
    </menupopup>
  </menu>
  <menuitem label="About" />
</menubar>
<div id="div_fileList">
  <vbox id="vbox_fileList">
  </vbox>
</div>
</window>
</zk>

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package javck.controller;
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
 
import org.zkoss.util.media.Media;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.UploadEvent;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zul.Button;
import org.zkoss.zul.Div;
import org.zkoss.zul.Hbox;
import org.zkoss.zul.Label;
import org.zkoss.zul.Menuitem;
import org.zkoss.zul.Toolbarbutton;
import org.zkoss.zul.Vbox;
 
public class UploadComposer extends GenericForwardComposer {
  private Button btn_upload;
  private Menuitem mi_upload;
  private Div div_fileList;
  private Vbox vbox_fileList;
  private String uploadFolderPath = "C:/Tomcat 6/webapps/ZK5Test/upload/";
  private String downloadUrl = "https://localhost/ZK5Test/upload/";
 
  @Override
  public void doAfterCompose(Component comp) throws Exception {
    super.doAfterCompose(comp);
  }
 
  public void onUpload$mi_upload(UploadEvent evt){
    System.out.println("MenuItem Upload....");
    Media[] medias = evt.getMedias();
    upload(medias);
  }
  
  public void onUpload$btn_upload(UploadEvent evt) {
    System.out.println("Button Upload....");
    Media[] medias = evt.getMedias();
    upload(medias);
  }
  
  private void upload(Media[] medias){
    for(Media obj : medias){
      //用來記錄檔案的大小
      int size = 0;
      //檔案的IO處理,將檔案從media透過inputstream 和outputstream來做傳輸
      try {
        FileOutputStream fos = new FileOutputStream(new File(uploadFolderPath + obj.getName()));
        InputStream is = obj.getStreamData();
        byte[] buffer = new byte[1024];
        int pointer = 0;
        while((pointer = is.read(buffer))!= -1){
          size += pointer;
          fos.write(buffer, 0, pointer);
        }
        if(is != null){
          is.close();
        }
        if(fos != null){
          fos.flush();
          fos.close();
        }
      } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      Hbox hb = new Hbox();
      hb.setParent(vbox_fileList);
      Toolbarbutton tbb = new Toolbarbutton();
      tbb.setLabel(obj.getName());
      tbb.setHref(downloadUrl + obj.getName());
      tbb.setParent(hb);
      Label lb = new Label();
      lb.setValue(size/1024 + " KB");
      lb.setParent(hb);
    }
  }
 
}