ext+struts2上传excel并将excel表格显示在extgrid控件上的解决方案

ext2.3

struts2

poi

ext上传，使用了extfileUploadField,需引入 <link rel="stylesheet" type="text/css" href="js/extjs/file-upload.css" />
<script type="text/javascript" src="js/extjs/FileUploadField.js"></script>：

<link rel="stylesheet" type="text/css" href="js/extjs/file-upload.css" mce_href="js/extjs/file-upload.css" />
<mce:script type="text/javascript" src="js/extjs/FileUploadField.js" mce_src="js/extjs/FileUploadField.js"></mce:script>
<mce:script type="text/javascript"><!--

Ext.onReady(function(){

//上传excel表格
var fp = new Ext.FormPanel({
renderTo: Ext.getBody(),
//这一行是必须的
fileUpload: true,
width: 500,
frame: true,
//title: '上传Excel',
autoHeight: true,
bodyStyle: 'padding: 10px 10px 0 10px;',
labelWidth: 50,
defaults: {
anchor: '95%',
allowBlank: false,
msgTarget: 'side'
},
items: [{
xtype: 'textfield',
fieldLabel: 'Name',
name:"txtname"
}, new Ext.form.FileUploadField({
name:'upload',
width:500
})],
buttons: [{
text: '上传',
handler: function() {
if (fp.getForm().isValid()) {
fp.getForm().submit({
url: 'qs/excelSettingUpload_excel2settingData',//后台处理的页面
//waitMsg: 'Uploading your photo...',
success: function(form, action) {
//返回的json数据是action.result
alert(Ext.decode(Ext.encode(action.result.data)));
},failure:function(f,a){
alert();
}
});
}
}
}, {
text: '重置',
handler: function() {
fp.getForm().reset();
}
}]
});
//***********excel上传窗口**************
var excelWindow =new Ext.Window({
renderTo:Ext.getBody(),
form:fp,
closeAction:"hide",
plain:true,
width:540,
title:"上传excel",
//modal:true,
items:fp
});
excelWindow.show();
});

// --></mce:script>

struts2接收上传文件并保存到服务器指定文件夹，然后将excel转化为json字符串后返回页面：

需注意的地方：1返回的json字符串中必须有success属性

private File upload;
/**
* 文件类型
*/
private String uploadContentType;
/**
* 文件名
*/
private String uploadFileName;

public String getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
private IQuotationSettingManage quotationSettingManage;

public void setQuotationSettingManage(
IQuotationSettingManage quotationSettingManage) {
this.quotationSettingManage = quotationSettingManage;
}
public void excel2settingData() throws IOException {
String realPath = ServletActionContext.getServletContext().getRealPath("/excel");
if(upload!=null){
String orderNo = "MA20100101";
Date d = new Date();
String saveFileContentType =uploadFileName.substring(uploadFileName.indexOf("."));
String saveFileName = orderNo+d.getTime()+saveFileContentType;
File saveFile = new File(new File(realPath),saveFileName);
if(!saveFile.getParentFile().exists()){
saveFile.getParentFile().mkdirs();
}
try {
FileUtil.copyFile(upload, saveFile);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if(saveFile.exists()){
//将excel表格拼成json数组
String jsonData = excel2JsonArray(saveFile.getAbsolutePath(),true);
//getResponse().setContentType("text/html; charset=utf-8");
//这样写就会下载返回的字符串了getResponse().setContentType("application/json;charset=utf-8");
//PrintWriter out = getResponse().getWriter();
//out.write("{success:true,data:"+jsonData+"}");
//输出如上
outJsonString("{success:true,data:"+jsonData+"}");
}

}
}

sturts2中调用的，poi操作excel返回json字符串的方法excel2JsonArray(saveFile.getAbsolutePath(),true)：

同时兼容2003和2007

private String excel2JsonArray(String excelFilePath,boolean flag) throws IOException{

Workbook xwb =null;
if(flag){
xwb = new XSSFWorkbook(excelFilePath);
}else{
File f = new File(excelFilePath);

FileInputStream is = new FileInputStream(f);
POIFSFileSystem fs = new POIFSFileSystem(is);
xwb = new HSSFWorkbook(fs);
}
return read(xwb);
}
private String read(Workbook xwb){
List dataList = new ArrayList();
List rowList = null;
// 9月20日五金电器招标采购竞价单.xlsx
Sheet xSheet = xwb.getSheetAt(0);
// 循环行Row
//从第3行开始
for (int rowNum = 2; rowNum <= xSheet.getLastRowNum(); rowNum++) {
Row xRow = xSheet.getRow(rowNum);
if (xRow == null) {
continue;
}
rowList = new ArrayList();
// 循环列Cell
for (int cellNum = 0; cellNum <= xRow.getLastCellNum(); cellNum++) {
Cell xCell = xRow.getCell(cellNum);
if (xCell == null) {
continue;
}
if (xCell.getCellType() == XSSFCell.CELL_TYPE_BOOLEAN) {
rowList.add(xCell.getBooleanCellValue());
} else if (xCell.getCellType() == XSSFCell.CELL_TYPE_NUMERIC) {
rowList.add(xCell.getNumericCellValue());
} else {
rowList.add(xCell.getStringCellValue());
}
}
dataList.add(rowList);
}
JSONArray jsonData = JSONArray.fromObject(dataList);
return jsonData.toString();
}

未完，待续