网站开发进阶(三十一)js如何将html表格导出为excel文件(后记)

js如何将html表格导出为excel文件(后记)

前言

项目前期做了个导出Excel表格的功能，但是经过测试发现只有在IE上才可以正确实现，在Chrome等浏览器中无法实现导出效果。经过上网搜索，尝试通过插件的形式实现。通过安装ActiveX for Chrome插件(地址栏输入chrome://extensions/ 进入扩展程序安装页面)。

经过测试，选择ActiveX插件的形式并不能解决问题，故弃掷。经过一番网络搜索，查到一个好的方法，其通过FileSaver.js实现浏览器写入文件到本地磁盘。代码如下:

<script>
(function(){
document.getElementById("saveBtn").onclick = function(event){
event.preventDefault();
var BB = self.Blob;
saveAs(
new BB(
["\ufeff" + document.getElementById("content").value] //\ufeff防止utf8 bom防止中文乱码
, {type: "text/plain;charset=utf8"}
)
, document.getElementById("filename").value
);
};
})();
</script>

按照前面订单打印的思路，在页面中嵌入一隐藏元素，然后获取其内容。隐藏元素代码如下:

<i id="sunny" hidden="hidden">{{querydata}}</i>

获取结果如下:



接下来需要做的工作解析上面的返回结果，然后拼接成Excel导出方法所需形式。

解析代码如下:

var content = document.getElementById("sunny").innerHTML;
//        alert(content);
var contentText = "药品名,药品ID,价格(元),数量(盒),下单时间,订单ID,订单内容,购药者,处方药,药品种类\n";
var obj = JSON.parse(content); // 由JSON字符串转换为JSON对象
//        alert(obj.length);
var billDtl = '';
for(k=0; k<obj.length; k++){
var bill = obj[k];
var content = '';
var index = bill.billContent.indexOf(',');
//        alert(index);
if(index != -1){
var contentArray = bill.billContent.split(",");
if(contentArray.length > 1){
for(j=0; j<contentArray.length-1; j++){
content += contentArray[j] + '、';
}
content += contentArray[j];
}
//        alert(content);
}
billDtl += bill.medname + "," + bill.medid + "," + bill.medprice + "," + bill.sellcnt + "," + bill.tx_time + "," + bill.billid + ","
+ content + "," + bill.buy_uid + "," + bill.iscf + "," + bill.medtype + "\n";
}
alert(billDtl);

其中主要涉及到

json数组字符串转换为json数组:

var obj = JSON.parse(content); // 由JSON字符串转换为JSON对象

订单内容格式化:

var content = '';

var index = bill.billContent.indexOf(',');

//alert(index);

if(index != -1){

var contentArray = bill.billContent.split(",");

if(contentArray.length > 1){

for(j=0; j<contentArray.length-1; j++){

content += contentArray[j] + '、';

}

content += contentArray[j];

}

//alert(content);

}else{

content = bill.billContent;

}

订单内容拼接:

billDtl += bill.medname + "," + bill.medid + "," + bill.medprice + "," + bill.sellcnt + "," + bill.tx_time + "," + bill.billid + "," + content + ","

+ bill.buy_uid + "," + bill.iscf + "," + bill.medtype + "\n";

至此，Ecxel可实现导出功能，唯一的缺陷就是不存在文件命名，存储位置选择的对话框。

为了解决文件命名、存储位置选择问题，自己不得不放弃原来的导出方法，尝试使用如下方法:

<span style="color:#ff0000;">(function (){
Downloadify.create('downloadify',{
filename: function(){
//return document.getElementById('filename').value;
return "Sunny.csv";
},
data: function(){
var content = document.getElementById("sunny").innerHTML;
//        alert(content);
var contentText = "药品名,药品ID,价格(元),数量(盒),下单时间,订单ID,订单内容,购药者,处方药,药品种类\n";
var obj = JSON.parse(content); // 由JSON字符串转换为JSON对象
//        alert(obj.length);
var billDtl = '';
for(k=0; k<obj.length; k++){
var bill = obj[k];
var content = '';
var index = bill.billContent.indexOf(',');
//        alert(index);
if(index != -1){
var contentArray = bill.billContent.split(",");
if(contentArray.length > 1){
for(j=0; j<contentArray.length-1; j++){
content += contentArray[j] + '、';
}
content += contentArray[j];
}
//        alert(content);
}else{
content = bill.billContent;
}
billDtl += bill.medname + "," + bill.medid + "," + bill.medprice + "," + bill.sellcnt + "," + bill.tx_time + "," + bill.billid + ","
+ content + "," + bill.buy_uid + "," + bill.iscf + "," + bill.medtype + "\n";
}
alert(billDtl);
return "\ufeff" + contentText + billDtl;
},
onComplete: function(){
alert('保存成功!');
},
onCancel: function(){
},
onError: function(){
alert('保存失败!');
},
transparent: false,
swf: 'img/downloadify.swf',
downloadImage: 'img/download.png',
width: 100,
height: 30,
transparent: true,
append: false
});
})();</span>

经过UI的稍微调整，问题总算得以解决。

参考文献

1.http://www.chromi.org/archives/10618

2.http://www.oschina.net/news/16501/new-plugin-make-chrome-support-activex

3.http://zhidao.baidu.com/link?url=-wD7FbuwVMYGGgCr4X65CmL73z7TF53dzYWD2Z1-t1ysM0U2CyyyzSymO43DaAgUpEcJ1zwm_mgT8JdGo26Om2t6h5yWTW0TzPJ3rXjP6rS

4.http://baike.baidu.com/link?url=tXq95A_vT1Ksgruf2wFAxzwzYocQk-UD3YQ6hYVwL1CORcCax7ThRE7jypfkqVEaXQ9wgieKECONqx7tp75SHw2-OJ8v9XYCNcFqGC4j2V3

5.http://my.oschina.net/tongjh/blog/316938

6.http://www.jb51.net/article/43136.htm

7.http://www.ynpxrz.com/n763517c2025.aspx

8.http://www.dreamdu.com/xhtml/tag_param/

有图有真相

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