public/static/common/js/plugin/export/tableExport.js

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(function(view){
	"use strict";
	var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
	var fromCharCode = String.fromCharCode;
	var INVALID_CHARACTER_ERR = ( function() {
        // fabricate a suitable error object
        try {
            document.createElement('$');
        } catch (error) {
            return error;
        }
    }());

	// encoder
	var btoa = function(string) {
	    var a, b, b1, b2, b3, b4, c, i = 0, len = string.length, max = Math.max, result = '';

	    while (i < len) {
	        a = string.charCodeAt(i++) || 0;
	        b = string.charCodeAt(i++) || 0;
	        c = string.charCodeAt(i++) || 0;

	        if (max(a, b, c) > 0xFF) {
	            throw INVALID_CHARACTER_ERR;
	        }

	        b1 = (a >> 2) & 0x3F;
	        b2 = ((a & 0x3) << 4) | ((b >> 4) & 0xF);
	        b3 = ((b & 0xF) << 2) | ((c >> 6) & 0x3);
	        b4 = c & 0x3F;

	        if (!b) {
	            b3 = b4 = 64;
	        } else if (!c) {
	            b4 = 64;
	        }
	        result += characters.charAt(b1) + characters.charAt(b2) + characters.charAt(b3) + characters.charAt(b4);
	    }
	    return result;
	};

	//获取dom文本
	var getText = function( el ){
		var s = el.textContent || el.innerText;
		return s == null ? "" : s.replace( /^\s*(.*?)\s+$/, "$1");
	};
	view.tableExport = function(tableId, filename, type){
		var doc = view.document,
			table = doc.getElementById(tableId),
			charSet = doc.characterSet

		var uri = {
			json: 'application/json;charset='+charSet,
			txt: 'csv/txt;charset='+charSet,
			csv: 'csv/txt;charset='+charSet,
			doc: 'application/vnd.ms-doc', 
			excel: 'application/vnd.ms-excel'
		};