Flex导出Excel

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Excel Flex Java JSP J#

Flex前端+Java后台，要将Flex界面中AdvancedDataGrid的数据导出成Excel文件。有2种方法：

1.直接在前台导出。
使用开源项目as3xls，下载个解决了中文乱码的as3xlsUTF8.swc包，加到Flex工程的引用库中。
AS代码，点击“导出Excel”按钮后的函数：

var sheet:Sheet = new Sheet();
private function export2ExcelHandel(e:MouseEvent):void
{
    //在前台生成Excel
    var excelFile:ExcelFile=new ExcelFile();
    var arr:ArrayCollection=myTable.dataProvider as ArrayCollection;
    for(var i:int=0; i<arr.length; i++)
    {
        var obj:Object=arr[i];
        var j:int=0;
        for(var key:String in obj)
        {
            excelFile.sheets.addItem(generateSheet(0,j,key));	
            excelFile.sheets.addItem(generateSheet(i,j,obj[key]));
            j++;
        }
    }       
    var mbytes:ByteArray=excelFile.saveToByteArray();
    var file:FileReference=new FileReference();
    file.save(mbytes,"测试文件.xls"); 
}
			
function generateSheet(i:int,j:int,o:Object):Sheet{
    if(!sheet){    
        sheet = new Sheet();    
        sheet.resize(10,10);    
    }    
    sheet.setCell(i, j, String(o));    
    return sheet;    
}

FileReference的save方法在Flash10才支持，
在Flex工程上右键，属性，Flex Conpiler中把Require Flash Player version:填为10.0.0；在Flex Build Path中加入playerglobal.swc
，路径为…\sdks\3.2.0\frameworks\libs\player\10\playerglobal.swc

2.通过调JSP或Servlet导出。
AS代码：

public static function ToExcel(dg:AdvancedDataGrid,name:String)
{
    //调用JSP
    var url:String="http://localhost:8080/XXX/Export/ExcelExport.jsp";
    var variables:URLVariables = new URLVariables(); 
    variables.htmltable = convertDGToHTMLTable(dg);
    var u:URLRequest = new URLRequest(url);
    u.data = variables;
    u.method = URLRequestMethod.POST;
    navigateToURL(u,"_self"); 
}

private static function convertDGToHTMLTable(dg:AdvancedDataGrid):String {
    //Set default values
    var font:String = dg.getStyle('fontFamily');
    var size:String = dg.getStyle('fontSize');
    var str:String = '';
    var colors:String = '';
    var style:String = 'style="font-family:'+font+';font-size:'+size+'pt;"';                
    var hcolor:Array;
	   
    //Retrieve the headercolor
    if(dg.getStyle("headerColor") != undefined) {
        hcolor = [dg.getStyle("headerColor")];
    } else {
        hcolor = dg.getStyle("headerColors");
    }                
	   
    str+= '<head><meta http-equiv="Content-Type" content="text/htm; charset=utf-8"></head><table width="'+dg.width+'" border="1"><thead><tr width="'+dg.width+'" style="background-color:#' +Number((hcolor[0])).toString(16)+'">';
    for(var i:int = 0;i<dg.columns.length;i++) {
        colors = dg.getStyle("themeColor");	           
        if(dg.columns[i].headerText != undefined) {
            str+="<th "+style+">"+dg.columns[i].headerText+"</th>";       	         
        } else {
            str+= "<th "+style+">"+dg.columns[i].dataField+"</th>";
        }
    }
    str += "</tr></thead><tbody>";
    colors = dg.getStyle("alternatingRowColors");
    for(var j:int =0;j<dg.dataProvider.length;j++) 
    {                    
        str+="<tr width=\""+Math.ceil(dg.width)+"\">";
	           
        for(var k:int=0; k < dg.columns.length; k++) {
            if(dg.dataProvider.getItemAt(j) != undefined && dg.dataProvider.getItemAt(j) != null) {              
                if(dg.columns[k].labelFunction != undefined) {
                    str += "<td width=\""+Math.ceil(dg.columns[k].width)+"\" "+style+">"+dg.columns[k].labelFunction(dg.dataProvider.getItemAt(j),dg.columns[k].dataField)+"</td>";
                } 
                else {
                    str += "<td width=\""+Math.ceil(dg.columns[k].width)+"\" "+style+">"+dg.dataProvider.getItemAt(j)[dg.columns[k].dataField]+"</td>";
                }
            }
        }
        str += "</tr>";
    }
    str+="</tbody></table>";
    return str;
}

ExcelExport.jsp放在后台XXX工程的WebRoot下的Export文件夹中。
ExcelExport.jsp：

<%@ page language="java"%>
<%@ page contentType="application/msexcel;charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
request.setCharacterEncoding("UTF-8");
//String instr=request.getParameter("filename");
response.setHeader("Content-disposition","attachment; filename=excel.xls");
response.setCharacterEncoding("UTF-8");
String str = request.getParameter("htmltable");
out.print(str);
%>