package com.appdev.bsf.vehicletracking.client.fileUpload;
import com.appdev.bsf.common.client.messagebox.MessageBox;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.FileUpload;
import com.google.gwt.user.client.ui.FormPanel;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent;
import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler;
import com.google.gwt.user.client.ui.FormPanel.SubmitEvent;
import com.google.gwt.user.client.ui.FormPanel.SubmitHandler;
import com.smartgwt.client.widgets.IButton;
import com.smartgwt.client.widgets.events.ClickEvent;
import com.smartgwt.client.widgets.events.ClickHandler;
import com.smartgwt.client.widgets.layout.HLayout;
/**
*
*/
public class DemoGwtFileUploadLayout extends HLayout {
private FormPanel formPanel = null;
public DemoGwtFileUploadLayout() {
setWidth(200);
final FileUpload fileUpLoad = new FileUpload();
// 名字必须与实体存路径的名字一致
fileUpLoad.setName("imageFileUpload");
formPanel = new FormPanel();
formPanel.setEncoding(FormPanel.ENCODING_MULTIPART);
formPanel.setMethod(FormPanel.METHOD_POST);
formPanel.setWidget(fileUpLoad);
final IButton btnUpload = new IButton("upLoadButton");
btnUpload.addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
formPanel.submit();
}
});
formPanel.addSubmitHandler(new SubmitHandler() {
@Override
public void onSubmit(SubmitEvent event) {
// 必须带参数id和clsUrl, 参数名必须是id,clsUrl
formPanel.setAction(GWT.getModuleBaseURL() + "fileupload?id=1&clsUrl=" + Object.class);
if (fileUpLoad.getFilename().length() == 0) {
MessageBox.getInstance().initComponents("必须选择一个文件");
event.cancel();
} else if (!fileUpLoad.getFilename().toLowerCase().endsWith(".jpg")
&& !fileUpLoad.getFilename().toLowerCase().endsWith(".gif")) {
event.cancel();
}
}
});
formPanel.addSubmitCompleteHandler(new SubmitCompleteHandler() {
@Override
public void onSubmitComplete(SubmitCompleteEvent event) {
String result = event.getResults();
if ("".equals(result)) {
MessageBox.getInstance().initComponents("文件上传成功");
} else {
MessageBox.getInstance().initComponents("文件上传失败");
}
}
});
addMember(formPanel);
addMember(btnUpload);
}
}
/**
* 下载文件
*
* @author wubin E-Mail:[email protected]
*
*/
class DownLoadLayout extends HLayout {
public DownLoadLayout() {
IButton downLoad = new IButton("下载", new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
/**
* 必须带参数名,参数名必须为url
*/
Window.open(GWT.getModuleBaseURL() + "filedownload?url=/uploads/2011/10/19/SNV83367.JPG",
"dd", "image");
}
});
addMember(downLoad);
}
}
gwt 前端上传,下载demo
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转载自smartgwt.iteye.com/blog/1206939
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