首先,zul檔的撰寫如下
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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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註一:
true表示使用預設的client
hander來處理上傳,maxsize=1024表示設定上傳檔案最大不得超過1024,單位是KB
註二:
maxsize=-1
,表示不限定上傳檔案大小,另外說明的是 ZK5
的fileupload機制有改寫過,大多數的元件都能夠透過upload這個屬性來提供檔案上傳的功能
接下來,撰寫composer程
式
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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 = "http://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);
}
}
}
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透過以上簡單的程式碼,就能做到如下的效果,給大家做個參考囉
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