文件下载上传ext4.0.7+struts2

2024-04-27 15:09:57

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所需jar包这里写图片描述

ext界面

{ xtype : 'button', cls : 'btn-color', text : "模板下载", width : 58, handler : downLoad},做一个隐形表单将其提交function downLoad() { download_form.submit(); }//表单<form action="pub/pob/download.action" style="MARGIN: 0px; PADDING-LEFT: 0px; WIDTH: 0px; PADDING-RIGHT: 0px; HEIGHT: 0px; PADDING-TOP: 0px" id="download_form" method="post" name="download_form"> <INPUT id="fName" value="分支总表Excel表格模板.xls" type="hidden" name="fName"> </form>struts2的配置<action name="download" class="com.holley.coms.web.pub.sys.Up_DownLoadAction" method="excute"><result name="success" type="stream">//mime类型因为要导出xls类型的 <param name="contentType">application/vnd.ms-excel</param> //一个获取流的get方法 <param name="inputName">downLoadFile</param> //对应的是下载文件的名称，在类中要有其getset方法 <param name="contentDisposition">attachment;filename="${fileName}"</param> //写入大小 <param name="bufferSize">1024</param></result></action>//后台java PRivate String fileName; private String inputPath; private InputStream DownLoadFile; private File excelFile; /** * 下载excel文件 * * @return */ public String excute() { String fName = getRequest().getParameter("fName"); if (StringUtil.isEmpty(fName)) { System.out.println("文件不存在"); success = false; return SUCCESS; } success = true; //从前台获取文件名称，set进去 setFileName(fName); return SUCCESS; } /** * 获取指定位置文件流 * * @return */ public InputStream getDownLoadFile() { return ServletActionContext.getServletContext().getResourceAsStream("/Firefox/" + fileName); }

文件上传

//上传按钮 { xtype:'button', cls : 'btn-color', text : "导入", width : 58, handler: fileUp },//上传弹框//导入文件 function fileUp(){ var upPanel = Ext.create('Ext.form.Panel',{ title:'',// width:600, bodyPadding:10,// height:400, items:[{ xtype:'textfield', allowBlank:false, fieldLabel:'选择文件', inputType:'file', //这里的name要和下面的fileName获取的name属性要一样 name:'excelFile' }], buttons:[{ text:'上传', margin:'1 50 3 10', handler:function(){ var form = this.up('form').getForm(); var fileName = form.findField('excelFile').getValue(); if(fileName==null||fileName==undefined||fileName==""){ form.reset(); Ext.Msg.alert("注意","请选择Excel文件!"); return; } /* var type = fileName.substring(fileName.indexOf("."),fileName.length); if(Ext.isEmpty(type)||type!=".xls"){ Ext.Msg.alert("注意","请选择后缀为.xls的文件!"); form.reset(); return; } */ if(form.isValid()){ form.submit({ url:'pub/pob/upload.action', params : {fileName : fileName}, method:'POST', waitTitle:'请稍等', waitMsg:'正在上传,请稍等...', success:function(fp,o){ Ext.Msg.alert('信息','文件上传成功'); upWin.close(); }, failure:function(fp,o){ Ext.Msg.alert('警告','连接失败'); upWin.close(); } }); } } }] }); upWin = Ext.create('Ext.window.Window',{ width:400, height:120, title:'文件上传', modal:true, layout:'fit', items:[upPanel] }).show(); }

struts2的配置文件

后台java代码

/** * 上传 * * @return * @throws Exception */ public String upload() throws Exception { //这里的fileName和前台的fileName要一样 String fileName = getRequest().getParameter("fileName"); if(StringUtil.isEmpty(fileName)){ return SUCCESS; } String excelPath = "upFile//" + fileName; String upPath = getsession().getServletContext().getRealPath("/") + excelPath; if (excelFile.isFile()) { BufferedInputStream bis = new BufferedInputStream(new FileInputStream(excelFile)); BufferedOutputStream bos = null; try { bos = new BufferedOutputStream(new FileOutputStream(upPath)); byte[] buff = new byte[8192]; for (int len = -1; (len = bis.read(buff)) != -1;) { bos.write(buff, 0, len); } bos.flush(); } catch (Exception e) { e.printStackTrace(); returnMsg = "文件上传失败"; HttpServletResponse response = ServletActionContext.getResponse(); response.setContentType("text/html;charset=UTF-8"); success = false; return SUCCESS; } finally { if (bis != null) { try { bis.close(); } catch (Exception e2) { e2.printStackTrace(); } } if (bos != null) { try { bos.close(); } catch (Exception e2) { e2.printStackTrace(); } } } } List<List<String>> BranchList = parseExcel(excelPath); boolean flag = optBranch(BranchList); returnMsg = "文件上传成功"; success = true; HttpServletResponse response = ServletActionContext.getResponse(); response.setContentType("text/html;charset=UTF-8"); return SUCCESS; }

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