H5把页面表格数据导出到本地文件，导出为本地csv文件

比眉伴天荒 2024-04-17 14:38 53阅读 0赞

## 参考iview的表格导出 ##

1.  导出表格需要有表头数据和具体数据

//表头
    let columns = [
    	{  title: '品牌', key: 'brandName' },
    	{  title: '品种', key: 'breedName' },
    	{  title: '平均零售价', key: 'avgRetailPrice' },
    	{  title: '平均批发价', key: 'avgBatchPrice' },
    	{  title: '平均成本价', key: 'avgCostPrice' },
    	{  title: '预估折扣', key: 'discount' },
    	{  title: '加盟分成', key: 'franchiseeSharing' },
    	{  title: '总部毛利率', key: 'headquartersRossInterestRate' },
    	{  title: '加盟分成金额', key: 'franchiseeSharingAmount' },
    	{  title: '总部分成金额', key: 'headquartersSharingAmount' },
    	{  title: '总部分成利润', key: 'headquartersProfits' },
    	{  title: '总部分成', key: 'headquartersSharing' },
    ];
    //数据源
    let datas = [
    	{ 
           "franchiseeSharing": 0,
           "brandName": "安姿",
           "avgCostPrice": 36.1,
           "discount": 1,
           "headquartersRossInterestRate": 0.9118,
           "categoryName": "太阳镜",
           "avgBatchPrice": 44.81,
           "headquartersSharing": 1,
           "headquartersProfits": 373.25,
           "avgRetailPrice": 409.35,
           "headquartersSharingAmount": 409.35,
           "franchiseeSharingAmount": 0
       },
       { 
           "franchiseeSharing": 0,
           "brandName": "安姿",
           "avgCostPrice": 36.1,
           "discount": 0.9,
           "headquartersRossInterestRate": 0.902,
           "categoryName": "太阳镜",
           "avgBatchPrice": 44.81,
           "headquartersSharing": 1,
           "headquartersProfits": 332.32,
           "avgRetailPrice": 409.35,
           "headquartersSharingAmount": 368.42,
           "franchiseeSharingAmount": 0
       },
    ]

1.  转换数据格式  
    每一列之间用‘，’连接， 表头和数据源每一行用‘\\r\\n’连接

//columns: 表头
    //datas: 数据源
    csv(columns, datas, options) { 
    	let defaults = { 
    		separator: ',',
    		quoted: false
    	}, newLine = '\r\n';
    	options = Object.assign({ }, defaults,options);
    
    	let columnOrder;
    	//content 存放表头， 数据源用逗号连接后的字符串，
    	//column: 存放当前表头
    	const content = [], column = [];
    	//columnOrder:存放需要导出的datas数据项对应的key
    	columnOrder = columns.map(v => { 
    		column.push(v.title) //表头项里没有设置title属性，可以用v.key代替
    		return v.key
    	})
    	//把表头列名用逗号连接，存入content
    	appendLine(content, column, options)
    	// 把datas里跟表头列key相符的数据拼接起来
    	if (Array.isArray(datas)) { 
    		datas.forEach(row => { 
    			if (!Array.isArray(row)) { 
    				row = columnOrder.map(k => row[k])
    			}
    			appendLine(content, row, options)
    		})
    	}
    	//拼接方法
    	function appendLine(content, row, {  separator, quoted }) { 
    		const line = row.map(data => { 
    			return data
    		})
    		content.push(line.join(separator))
    	}
    	//用换行符连接
    	return content.join(newLine)
    },

1.  导出

exportCsv() { 
    	function has(browser) { 
    	//判断浏览器，做兼容处理
    		const ua = window.navigator.userAgent;
    		//是否是IE浏览器
    		if (browser === 'ie') { 
    			const isIE = ua.indexOf('compatible') > -1 && ua.indexOf('MSIE') > -1;
    			if (isIE) { 
    				const reIE = new RegExp('MSIE (\\d+\\.\\d+)');
    				reIE.test(us);
    				return parseFloat(RegExp['$1'])
    			} else { 
    				return false
    			}
    		} else { 
    			return ua.indexOf(browser) > -1
    		}
    	}
    	const csv = { 
    		_isIE11() { 
    			let iev = 0;
    			const ieold = (/MSIE (\d+\.\d+);/.test(navigator.userAgent));
    			const trident = !!navigator.userAgent.match(/Trident\/7.0/);
    			const rv = navigator.userAgent.indexOf('rv:11.0');
    
    			if (ieold) { 
    				iev = Number(RegExp.$1);
    			}
    			if (navigator.appVersion.indexOf('MSIE 10') !== -1) { 
    				iev = 10;
    			}
    			if (trident && rv !== -1) { 
    				iev = 11;
    			}
    
    			return iev === 11;
    		},
    		_isEdge() { 
    			return /Edge/.test(navigator.userAgent);
    		},
    		_getDownloadUrl(text) { 
    			const BOM = '\uFEFF'; //表明是字节流的标识，用来标示它是UTF-8的文件。
    
    			if (window.Blob && window.URL && window.URL.createObjectURL) { 
    				const csvData = new Blob([BOM + text], {  type: 'text/csv' });
    				return URL.createObjectURL(csvData)
    			} else { 
    				return 'data:attachment/csv;charset=utf-8,' + BOM + encodeURIComponent(text)
    			}
    		},
    		download: function (fileName, text) { 
    		//IE及IE10以下，通过富文本编辑器的saveas来保存
    			if (has('ie') && has('ie') < 10) { 
    				const oWin = window.top.open('about:blank', '_blank');
    				oWin.document.charset = 'utf-8';
    				oWin.document.write(text);
    				oWin.document.close();
    				oWin.document.execCommand('SaveAs',false, fileName);
    				oWin.close()
    			} else if (has('ie') === 10 || this._isIE11() || this._isEdge()) { 
    			//navigator.msSaveBlob
    				const BOM = '\uFEFF'; //表示utf-8编码的字节流
    				const csvData = new Blob([BOM + text], {  type: 'text/csv' });
    				navigator.msSaveBlob(csvData, fileName);
    			} else { 
    			//通过a标签。模拟下载
    				const link = document.createElement('a');
    				link.download = fileName;
    				link.href = this._getDownloadUrl(text);
    				document.body.appendChild(link);
    				link.click();
    				document.body.removeChild(link);
    			}
    		}
    	};
    
    	return csv;
    }

1.  完整使用

const params = { 
    	filename: 'table.csv',
    	original: true,
    };
    let columns = [], datas = []; //数据格式参考1
    const data = this.csv(columns, datas, params);
    exportCsv().download(params.filename, data);