web导出文件核心代码实例

本篇内容主要讲解"web导出文件核心代码实例"，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习"web导出文件核心代码实例"吧!

前端代码

1.可直接写：location.href = "后台请求地址"
2.用XMLHttpRequest形式（ajax axios fetch）:

axios({    url: url,    params: parameter,    method:'get' ,    responseType: 'blob'  }).then(data=>{        if (!data) {                alert("文件下载失败")                return        }        if (typeof window.navigator.msSaveBlob !== 'undefined') {                //处理IE                window.navigator.msSaveBlob(new Blob([data]), fileName+'.xls')        }else{                let url = window.URL.createObjectURL(new Blob([data]))                let link = document.createElement('a')                link.style.display = 'none'                link.href = url                link.setAttribute('download', fileName+'.xls')                document.body.appendChild(link)                link.click()                document.body.removeChild(link); //下载完成移除元素                window.URL.revokeObjectURL(url); //释放掉blob对象        }})

后台代码

      //从服务器上下载文件核心代码        response.setContentType("application/x-msdownload;charset=utf-8");        String fileName="中文文件名.xls";        String userAgent = request.getHeader("user-agent").toLowerCase();        if (userAgent.contains("msie") || userAgent.contains("like gecko") ) {                fileName = URLEncoder.encode(fileName, "UTF-8");        }else {                  fileName = new String(fileName.getBytes("UTF-8"), "iso-8859-1");          }         response.setHeader("Content-disposition", "attachment; filename="+ fileName);                InputStream inputStream = null;        OutputStream outputStream=null;        try {                String imgurl = "服务器上的文件实际地址";                inputStream = new BufferedInputStream(new FileInputStream(imgurl));                outputStream = response.getOutputStream();                byte[] buf = new byte[1024];            int len;            while ((len = inputStream.read(buf)) > 0) {                    outputStream.write(buf, 0, len);            }            response.flushBuffer();        } catch (Exception e) {                logger.info("--通过流的方式获取文件异常--"+e.getMessage());        }finally{                if(inputStream!=null){                        inputStream.close();                }                if(outputStream!=null){                        outputStream.close();                }        }

    //导出excel                //此处省略 生成workbook的代码                String fileName = "登记发证统计.xls";        String userAgent = req.getHeader("user-agent").toLowerCase();        if (userAgent.contains("msie") || userAgent.contains("like gecko") ) {                fileName = URLEncoder.encode(fileName, "UTF-8");        }else {                  fileName = new String(fileName.getBytes("UTF-8"), "iso-8859-1");          }         // 设置强制下载不打开                   resp.setContentType("application/force-download");         resp.setHeader("Content-disposition", "attachment; filename="+ fileName);        OutputStream out = resp.getOutputStream();        workbook.write(out);          resp.flushBuffer();

生成workbook的示例

到此，相信大家对"web导出文件核心代码实例"有了更深的了解，不妨来实际操作一番吧！这里是网站，更多相关内容可以进入相关频道进行查询，关注我们，继续学习！