文件下載 上傳ext4.0.7+struts2

所需jar包

ext界面

{
    xtype : 'button',
    cls : 'btn-color',
    text : "模板下載",
    width : 58,
    handler : downLoad
},
做一個隱形表單將其提交
function downLoad() {
            download_form.submit();
        }
//表單
<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="分支總表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類型 因爲要導出xls類型的
    <param name="contentType">application/vnd.ms-excel</param>
    //一個獲取流的get方法
    <param name="inputName">downLoadFile</param>
    //對應的是下載文件的名稱，在類中要有其getset方法
    <param name="contentDisposition">attachment;filename="${fileName}"</param>
    //寫入大小
    <param name="bufferSize">1024</param>
</result>
</action>

//後臺java
    private String fileName;
    private String inputPath;
    private InputStream DownLoadFile;
    private File excelFile;
    /**
     * 下載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;
        //從前臺獲取文件名稱，set進去
        setFileName(fName);
        return SUCCESS;
    }

    /**
     * 獲取指定位置文件流
     * 
     * @return
     */
    public InputStream getDownLoadFile() {
        return ServletActionContext.getServletContext().getResourceAsStream("/fireFox/" + fileName);
    }

文件上傳

//上傳按鈕
    {
    xtype:'button',
    cls : 'btn-color',
    text : "導入",
    width : 58,
    handler: fileUp
    },
//上傳彈框
//導入文件
        function fileUp(){
            var upPanel = Ext.create('Ext.form.Panel',{
                title:'',
//              width:600,
                bodyPadding:10,
//              height:400,
                items:[{
                    xtype:'textfield',
                    allowBlank:false,
                    fieldLabel:'選擇文件', 
                    inputType:'file',
                    //這裏的name要和下面的fileName獲取的name屬性要一樣
                    name:'excelFile'
                }],
                buttons:[{
                    text:'上傳',
                    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","請選擇Excel文件!");
                            return;
                        }
                        /* var type = fileName.substring(fileName.indexOf("."),fileName.length);
                        if(Ext.isEmpty(type)||type!=".xls"){
                            Ext.Msg.alert("注意","請選擇後綴爲.xls的文件!");
                            form.reset();
                            return;
                        } */
                        if(form.isValid()){
                            form.submit({
                                url:'pub/pob/upload.action',
                                params : {fileName : fileName},
                                method:'POST',
                                waitTitle:'請稍等',
                                waitMsg:'正在上傳,請稍等...',
                                success:function(fp,o){
                                    Ext.Msg.alert('信息','文件上傳成功');
                                    upWin.close();
                                },
                                failure:function(fp,o){
                                    Ext.Msg.alert('警告','連接失敗');
                                    upWin.close();
                                }
                            });
                        }
                    }
                }]
            });
            upWin = Ext.create('Ext.window.Window',{
                width:400,
                height:120,
                title:'文件上傳',
                modal:true,
                layout:'fit',
                items:[upPanel]
            }).show();
        }

struts2的配置文件

<action name="upload" class="com.holley.coms.web.pub.sys.Up_DownLoadAction"
            method="upload">
            <result name="success" type="json">
                <param name="contentType">text/html</param>
            </result>
</action>

後臺java代碼

/**
     * 上傳
     * 
     * @return
     * @throws Exception
     */
    public String upload() throws Exception {
    //這裏的fileName和前臺的fileName要一樣
        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 = "文件上傳失敗";
                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 = "文件上傳成功";
        success = true;
        HttpServletResponse response = ServletActionContext.getResponse();
        response.setContentType("text/html;charset=UTF-8");
        return SUCCESS;
    }