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一个比较难的Excel输出的问题请教

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作者 正文
   发表时间:2007-11-29  
问题描述:
Ext(1.0)下表单提交到servlet中生成excel文件供用户下载,要求是浏览器自动出现下载对话框供用户保存到本地。经测试,生成excel本身没有任何问题,但浏览器不能出现下载对话框,请帮忙看看。
Ext表单主要代码如下:
if (form_instance_create.isValid()) {
     aAddInstanceDlg.hide();
                     //alert(swjg_tf);
form_instance_create.submit({
    url:'/ssgly/ExcelOutPut.do',
params:{ssgly:ldCb.getValue()},
waitMsg:'正在导出,请稍候........',
reset: false,
failure: function(form_instance_create, action) {
    Ext.MessageBox.alert('错误', action.result.errorInfo);
},
success: function(form_instance_create, action) {
    Ext.MessageBox.alert('导出成功', action.result.info);
    aAddInstanceDlg.hide();
    ds.load({params:{start:0, limit:myPageSize}});
}
});


servlet代码如下:
System.out.println("已有用户正在导出Excel!.....");
		PrintWriter out = null;
	    out = response.getWriter();
		//String fname="纳税人基本信息表"; 
		String fname="nsrxxTable.xls";
	    OutputStream os = null;
		os = response.getOutputStream();// 取得输出流
	    response.reset();// 清空输出流
	    response.setHeader("Content-Disposition", "attachment; filename=\"" + fname + "\"");// 设定输出文件头
	    response.setContentType("application/vnd.ms-excel");// 定义输出类型

		 
		String ssgly=request.getParameter("ssgly");
		 
		 
		
        Page page=new Page(1,MAX_PAGE_SIZES);
        Boolean asc=true;
        //String zg_swgy_dm="13408030006";
        String nsrlx="";
        String nsrsbh="";
        List datas = new ArrayList();
        List nsrxxList=businessService.listNsrxxService(page, asc, ssgly, nsrlx, nsrsbh);
        if (nsrxxList!=null){
        	    for(Iterator data=nsrxxList.iterator();data.hasNext();){
                Nsrxx nsrxx=(Nsrxx)data.next();
                String[] sz=nsrxx.toStringSz();
                datas.add(sz);
                try {
    	            OutputStream outPut = new FileOutputStream(fname);
    	            JxlExcelWriter jxlExcelWriter = new JxlExcelWriter();  //我自己定义的产生excel类
    	            jxlExcelWriter.writeExcel(outPut, datas, new String[] {
    	            	   "纳税人识别号",                                                                                                                                                                                                                                                                              
    	 	               "纳税人名称",                                                                                                                                                                                                                                                                                 
    		               "scjydz    ",                                                                                                                                                                                                                                                                                 
    		               "fddbrmc   ",                                                                                                                                                                                                                                                                                 
    		               "bsrmc     ",                                                                                                                                                                                                                                                                                 
    		               "dhhm      ",                                                                                                                                                                                                                                                                                 
    		               "hy_dm     ",                                                                                                                                                                                                                                                                                 
    		               "hy_mc     ",                                                                                                                                                                                                                                                                                 
    		               "hymx_dm   ",                                                                                                                                                                                                                                                                                 
    		               "hymx_mc   ",                                                                                                                                                                                                                                                                                 
    		               "nsrzt_dm  ",                                                                                                                                                                                                                                                                                 
    		               "nsrzt_mc  ",                                                                                                                                                                                                                                                                                 
    		               "djzclx_dm ",                                                                                                                                                                                                                                                                                 
    		               "djzclx_mc ",                                                                                                                                                                                                                                                                                 
    		               "zg_swgy_dm",                                                                                                                                                                                                                                                                                 
    		               "czry_mc   ",                                                                                                                                                                                                                                                                                 
    		               "nsrlx     ",                                                                                                                                                                                                                                                                                 
    		               "qzd_bz    ",                                                                                                                                                                                                                                                                                 
    		               "zdsy_dm   ",                                                                                                                                                                                                                                                                                 
    		               "zdsy_mc   ",                                                                                                                                                                                                                                                                                 
    	                   "nsr_swjg_dm" },"纳税人信息");
    	            //os.close();
    	        } catch (FileNotFoundException e) {
    	        	 out.print("{failure:true,errorInfo:'数据导出失败!'}");
    	            e.printStackTrace();
    	        } catch (IOException e) {
    	        	 out.print("{failure:true,errorInfo:'数据导出失败!'}");
    	            e.printStackTrace();
    	        }

                
           } 
        } //end if
    	 out.print("{success:true,info:'outPut Excel Success!'}");
 
 
		return null;
	}
    
   发表时间:2007-11-29  
response.setContentType("application/octet-stream");
0 请登录后投票
   发表时间:2007-11-29  
cbhyk 写道
response.setContentType("application/octet-stream");


这个我试了,还是没有效果。
0 请登录后投票
   发表时间:2007-11-29  
用的是poi-3.0.1-FINAL-20070705.jar

ByteArrayOutputStream byteOutputStream=new ByteArrayOutputStream();
workBook.write(byteOutputStream);
byte[] bytes=byteOutputStream.toByteArray();
response.reset();
response.setContentType("application/vnd.ms-excel");
response.setContentLength(bytes.length);
response.setHeader("Content-Disposition","attachment;filename=\"exportfile.xls\"");
ServletOutputStream ouputStream = response.getOutputStream();
ouputStream.write(bytes,0,bytes.length);
ouputStream.flush();
ouputStream.close();
byteOutputStream.close();
0 请登录后投票
   发表时间:2007-11-29  
我是这样实现的:

		System.out.println("已有用户正在导出Excel!.....");
		PrintWriter out = null;
		String fname="nsrxxTable.xls";
	    out = response.getWriter();
		//String fname="纳税人基本信息表";
		String path="/ssgly";
	    File file=new File(path,fname);
	
	    response.reset();// 清空输出流
	    response.setHeader("Content-Disposition", "attachment; filename=" + fname);// 设定输出文件头
	    response.setContentType("application/msexcel");// 定义输出类型

		 
		String ssgly=request.getParameter("ssgly");
		System.out.println(ssgly);

        Page page=new Page(1,MAX_PAGE_SIZES);
        Boolean asc=true;
        //String zg_swgy_dm="13408030006";
        ssgly="13408030006";
        String nsrlx="";
        String nsrsbh="";
        List datas = new ArrayList();
        List nsrxxList=businessService.listNsrxxService(page, asc, ssgly, nsrlx, nsrsbh);
        FileInputStream outPut = new FileInputStream(path+"/"+fname);
       
        
        if (nsrxxList!=null){
        	    for(Iterator data=nsrxxList.iterator();data.hasNext();){
                Nsrxx nsrxx=(Nsrxx)data.next();
                String[] sz=nsrxx.toStringSz();
                datas.add(sz);
                JxlExcelWriter jxlExcelWriter = new JxlExcelWriter();
				jxlExcelWriter.writeExcel(file, datas, new String[] {
					   "纳税人识别号",                                                                                                                                                                                                                                                                              
				       "纳税人名称",                                                                                                                                                                                                                                                                                 
				       "scjydz    ",                                                                                                                                                                                                                                                                                 
				       "fddbrmc   ",                                                                                                                                                                                                                                                                                 
				       "bsrmc     ",                                                                                                                                                                                                                                                                                 
				       "dhhm      ",                                                                                                                                                                                                                                                                                 
				       "hy_dm     ",                                                                                                                                                                                                                                                                                 
				       "hy_mc     ",                                                                                                                                                                                                                                                                                 
				       "hymx_dm   ",                                                                                                                                                                                                                                                                                 
				       "hymx_mc   ",                                                                                                                                                                                                                                                                                 
				       "nsrzt_dm  ",                                                                                                                                                                                                                                                                                 
				       "nsrzt_mc  ",                                                                                                                                                                                                                                                                                 
				       "djzclx_dm ",                                                                                                                                                                                                                                                                                 
				       "djzclx_mc ",                                                                                                                                                                                                                                                                                 
				       "zg_swgy_dm",                                                                                                                                                                                                                                                                                 
				       "czry_mc   ",                                                                                                                                                                                                                                                                                 
				       "nsrlx     ",                                                                                                                                                                                                                                                                                 
				       "qzd_bz    ",                                                                                                                                                                                                                                                                                 
				       "zdsy_dm   ",                                                                                                                                                                                                                                                                                 
				       "zdsy_mc   ",                                                                                                                                                                                                                                                                                 
				       "nsr_swjg_dm" },"纳税人信息");
	         //os.flush();
	         //os.close();

                
           } 
        } //end if
    	// out.print("{success:true,info:'outPut Excel Success!'}");
        System.out.println("数据流长度:"+outPut.toString());
        int i;
        while ((i=outPut.read())!=-1){
        	out.write(i);
        }
        outPut.close();
        
        //out.print("{success:true,info:'outPut Excel Success!'}");
        out.close();
		return null;
	}
	


不同之处在于使用了 变量 PrintWriter out ,但这和ext中表单提交后返回:
out.print("{success:true,info:'outPut Excel Success!'}");

冲突了。还请大家出出主意。
0 请登录后投票
   发表时间:2007-11-30  
要做到浏览器启动出现下载对话框,客户端只能采用传统的form/submit方式,这个在Ext官方论坛上讨论过。

我的代码如下(实现网格数据导出到Excel):

(1)添加form html:
		var html2 = [
				'<div id="grid-export-form" class="x-hidden">',
				'    <form method="POST" name="GridExportForm">',
...
				'    </form>',	
				'</div>	'].join('');
		Ext.DomHelper.append(document.body, {
			html : html2
		});


(2)通过提交动作调用后台Servlet导出到Excel:
		document.GridExportForm.action = this.url+'&export2excel=y';
		...
		document.GridExportForm.submit();
0 请登录后投票
   发表时间:2007-11-30  
这个问题已解决。楼上说的对。还是在Ext管网上找到答案的。
但也很感谢fangzhouxing。看来你也是ext官网的常客。呵呵。
最后,对robbin说上几句:有关ext上的帖子看仔细了,不要随便转移到别处。这点ext官网上的网管做的比较专业。
0 请登录后投票
   发表时间:2008-03-29  
可以利用 upload 方式实现
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