extjs 文件上传

功能要求：

在mastplan页面添加按钮，实现上传excel文件的功能，并在保存之前读取文件内容将其保存到数据库里面。

 

具体实现：

 

^_^ 先闪闪图片吧。

Jsp页面代码：

在tbar工具栏中添加一按钮： 单击此按钮，弹出一个上传文件的窗口

,{id:"upload_excel",xtype: "button",cls:"x-btn-icon",icon:"/_static/icon/upload_excel.png",tooltip:"upload",scope:this,handler: function(){win_upload.show();}}

var form = new Ext.form.FormPanel({
     baseCls : 'x-plain',
     labelWidth : 70,
     labelHeight: 150,
     fileUpload : true,
     defaultType : 'textfield',
     items : [{
        xtype : 'textfield',
        fieldLabel : '選擇文件',
        name : 'userfile',
        id : 'userfile',
        inputType : 'file',
        anchor : '95%' // anchor width by percentage
       }]
 
});

var win_upload = new Ext.Window({
	title : 'UploadFile',
	width :450,
	height : 180,
	modal : true,
	x : 100,
	y : 50,
	layout : 'form',
	autoScroll : true,
	constrain : true,
	bodyStyle : 'padding:10px 10px 10px 10px;',
	items:form,
	buttons : [{
		text : '確認上傳',
      handler : function() {
       if (form.form.isValid()) {
        if(Ext.getCmp('userfile').getValue() == ''){
         Ext.Msg.alert('溫馨提示','請選擇要上傳的文件');
         return;
        }
        Ext.MessageBox.show({
           title : '請稍後....',
           msg : '文件正在上傳中....',
           progressText : '',
           width : 300,
           progress : true,
           closable : false,
           animEl : 'loding'
        });
        form.getForm().submit({
			url : 'upload',
			method : 'POST',
			success : function(form, action) {
			Ext.Msg.alert('成功','恭喜！文件上傳成功！'+action.result.success);
			win_upload.hide();
         },
         failure : function(form, action) {
          	Ext.Msg.alert('錯誤',"文件上傳失敗，請重新操作！");
         }
        })
       }
      }
	}, {
		text : 'Close',
		handler : function() {
			win_upload.hide();
	}
	}],
	closable: false,
	draggable: false,
	resizable: false
});


Java代码：
在保存文件之前获取流信息，并将其读出。
获取excel内容

package javaservlets.production.uploadexcel;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.json.JSONException;
import org.json.JSONObject;

public class Upload extends HttpServlet {

	private static final long serialVersionUID = 6777945010008132796L;

	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		super.doGet(req, resp);
		System.out.println("doGet");
		resp.sendRedirect("/upload/index.jsp");
	}
	
	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
		
System.out.println("--------------------------------- upload ---------------------------------------------------");
		
		InputStream is = null;
		Workbook workbook = null;
		
		try {
			List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(req);
			for (FileItem item : items) {
				if (item.isFormField()) {
					System.out.println(item.getFieldName());
					System.out.println(item.getString());
				} else {
					System.out.println(item.getFieldName());
					is = item.getInputStream();
					workbook = Workbook.getWorkbook(is);
				}
			}
	
	   Sheet[] sheetNum = workbook.getSheets();
System.out.println("----------------------------------打印sheet的個數："+sheetNum.length+"----------------------------");
       Sheet sheet = workbook.getSheet(0);
       Cell cell = null;

       int columnCount = sheet.getColumns();
       int rowCount = sheet.getRows();
       for (int i = 0; i < rowCount; i++) {
           for (int j = 0; j < columnCount; j++) {
              cell = sheet.getCell(j, i);
              System.out.print(cell.getContents());
           }
           System.out.println(" \n");
       }
           resp.setContentType("text/html");
       	   JSONObject jObject = new JSONObject();
		   try {
			jObject.put("success", "true");
		} catch (JSONException e) {
			e.printStackTrace();
			try {
				jObject.put("success", "false");
			} catch (JSONException e1) {
				e1.printStackTrace();
			}
		}
    	   resp.getWriter().print(jObject.toString());
		  // resp.sendRedirect("/upload/index.jsp");
		   workbook.close();
		} catch (FileUploadException e) {
			e.printStackTrace();
		} catch (BiffException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} 
		
	}
}