EXT2.0+STRUTS2框架下的文件上传和中文文件下载
1.struts-xml配置文件的设置：
????????????????<constant name="struts.multipart.maxSize" value="15097152"/><!-- 文件上传中整个请求内容允许的最大字节数为15M -->
?
?????????????????<!-- 提供文件上传功能 -->
??????????????? <interceptor-ref name="fileUpload"/>
?
??? ?<!--? 附件 Action -->
??? ?<action name="attachmentsAction" pageEncoding="UTF-8"%>
<html>
? <head>
??? <title>附件管理</title>
??
?<link href="/ext/resources/css/ext-all.css" rel="stylesheet" type="text/css" />
?<script language="JavaScript" type="text/javascript" src="/ext/ext-base.js"></script>
?<script language="JavaScript" type="text/javascript" src="/ext/ext-all.js"></script>
?<script language="JavaScript" type="text/javascript" src="/ext/ext-lang-zh_CN.js"></script>?
?<script language="JavaScript" type="text/javascript">
?var center;
?var addFrom;
?Ext.onReady(function(){
????
????? ?addForm = new Ext.FormPanel({
????id: 'addForm',
?????? fileUpload:true,??
?????? frame:true,
?????? labelWidth: 60,?
?????? bodyStyle: 'padding:5px 5px 0',??
?????? labelAlign:'left',??
?????? items:[{?
?????border: false,
?????layout:'column',
?????collapsible: true,?
?????items: [{???
???????????????? ?columnWidth : 0.98,?
???????????????? ?border: false,
?????????????????? layout : 'form',??
?????????????????? defaultType : 'textfield',??
?????????????????? items : [
?????????????????? ?
????????{fieldLabel:'文件1', xtype:'textfield', inputType:'file', name: 'upload', cls:'nobordertext', anchor:'98%',allowBlank: true},
?????????????????? ?{fieldLabel: '摘要1',? maxLength:'255', name: 'description', maxLengthText:'供方负责人的字数不能超过50', anchor:'98%'}
?????????????????? ?,{fieldLabel:'文件2', xtype:'textfield', inputType:'file', name: 'upload', cls:'nobordertext', anchor:'98%'},
?????????????????? ?{fieldLabel: '摘要2',? maxLength:'255', name: 'description', maxLengthText:'供方负责人的字数不能超过50', anchor:'98%'},
?????? ????{fieldLabel:'文件3', xtype:'textfield', inputType:'file', name: 'upload', cls:'nobordertext', anchor:'98%'},
?????? ????{fieldLabel: '摘要3',? maxLength:'255', name: 'description', maxLengthText:'供方负责人的字数不能超过50', anchor:'98%'}
?????????????????? ]
????????????????? }
?????]
????}
????],
????buttons: [
?????{text: '确定',handler: saveForm},
?????{text: '关闭',handler: function(){
???????addForm.getForm().reset();
???????window.close();
??????}
?????}
????]
???});
????? ?center = new Ext.Panel({
????????? id: 'center',
????????? region:'center',
????????? border: false,
???????? ?autoScroll: true,
????enableTabScroll:true,
????????? items: [addForm]
????? });
???var panel = new Ext.Panel({
????id: 'panel',
?????? layout:'fit',
?????? border: false,
?????? items: [center]
???});
????? ?
????? ?var viewport = new Ext.Viewport({
????id: 'viewport',
????? ?layout: 'fit',
????? ?autoScroll: true,
????? ?items:[panel]
???});
????? ?
?});
?
?function saveForm(){
??var _url ="/*/*/attachmentsAction!saveAttachmentsInfo.html";
??addForm.getForm().submit({
???url: _url,
???method: 'post',
???//params:{fkId: addForm.findById("fkId").getValue()},
???//提交成功的回调函数
???success:function(form,action){
????if (action.result.msg=='success') {
?????addForm.getForm().reset();
?????window.close();
????} else if (action.result.msg=='notFile') {
?????Ext.Msg.alert('提示','上传的文件不存在！请重试！');
????} else if(action.result.msg=='SizeLimitExceededException') {
?????Ext.Msg.alert('提示','您上传的文件太大！文件不能超过15M');
????}
???},
???failure:function(form,action){
??? ?Ext.MessageBox.hide();
????Ext.MessageBox.alert('Error',action.result.msg);
????Ext.Msg.alert('错误','服务器出现错误请稍后再试！');
???}
??});
?}
?</script>
? </head>
?
? <body>
? </body>
</html>
3.java处理页面AttachmentsAction.java
{
?
??? //这里对应的是EXT页面定义的file控件的NAME名称。。这个是struts2提供给我们的属性
????//您可以修改成其他的名称，，只要upload ，uploadFileName，uploadContentType 保持一致即可
??? private List<File> upload = new ArrayList<File> ();
??? private List<String> uploadFileName = new ArrayList<String> ();
??? private List<String> uploadContentType = new ArrayList<String> ();
??? private List<String> description = new ArrayList<String> ();
?? final static int MAX_SIZE = 15 * 1024 * 1024; // 设置上传文件最大为 15M
?? final static String dir = "/Attachments/";
?
?? 。。省略掉set。get方法
?
?????/**
? * 保存多个Attachments对象。
? * 这里介绍的是把文件保存到服务器的文件夹中。。并不是保存在数据库里.
? * author by xj
? * @return
? * @throws Exception
? */
?public String saveAttachmentsInfo() throws Exception {
??//取的系统当前时间
??Calendar cal1 = new GregorianCalendar();
??SimpleDateFormat theDate = new SimpleDateFormat("yyyy-MM-dd");
??String strDate = theDate.format(cal1.getTime());
??????? String year = "2000";
??????? String month = "12";
??????? if (strDate.length() > 9) {
??????? ?year = strDate.substring(0,4);
??????? ?month = strDate.substring(5,7);
??????? }
??????? //得到文件的相对路径
??????? String uploadDir = dir + year + "/" + month + "/";
??????? //获得文件的绝对路径
???? String realUploadDir = ServletActionContext.getServletContext().getRealPath(uploadDir);
???? // the directory to upload to用于存放上传文件的目录
??File dirPath = new File(realUploadDir);
???? if (!dirPath.exists()) {
???? ?? dirPath.mkdirs();
???? }
??String name = "";
??String address = "";
??String measurements = "";
??String descriptionName = "";
???? String link = "";
???? String msg = "{success:true, msg:'failure'}";
???? if (upload.size() > 0){
???? ?for(int i=0; i < upload.size();i++){
???? ??Boolean isFile = upload.get(i).exists();
???? ??if (isFile){
?????//保存附件数据库信息
?????//取得原始文件名
?????name = uploadFileName.get(i);
?????//取得文件的后缀名
?????String suffix = "";
?????if (name != null && (!name.equals(""))){
??????attachments.setName(name);
??????if (name != null && (!name.equals(""))) {
???????suffix = name.substring(name.lastIndexOf("."), name.length());
??????}
?????}
?????//对数据库操作... 这里我们需要的是记录的ID作为保存文件的名字
?????attachments = new Attachments();
?????String aId = attachmentsManager.createAttachmentsInfo(attachments);
?????String fileUrl = realUploadDir + "/" + aId + suffix;
?????this.copy(upload.get(i), new File(fileUrl));
?????????? link = link + "文件名为" + name + " 上传成功！/n";
?????????? msg = "{success:true, msg:'success', link:'" + link + "'}";
???? ??}else{
???? ???????? link = "上传的文件不存在";
???? ???? ?msg = "{success:true, msg:'notFile', link:'" + link + "'}";
???? ??}
???}
???? } else {
???????? link = "文件太大";
???? ?msg = "{success:true, msg:'SizeLimitExceededException', link:'" + link + "'}";
???? }
???? HttpServletResponse response = ServletActionContext.getResponse();
???? response.reset();
???? response.setContentType("text/html;charset=UTF-8");
???? out = response.getWriter();
???? out.print(msg);
???? return NONE;
?}
?private void copy(File src, File dst) throws Exception{
??????? InputStream in = null;
??????? OutputStream out = null;
??????? try {
??????????? in = new FileInputStream(src);
??????????? out = new FileOutputStream(dst);
??????????? byte[] buffer = new byte[8192];
???????? int bytesRead;
???????? while ((bytesRead = in.read(buffer, 0, 8192)) != -1) {
???????? ?out.write(buffer, 0, bytesRead);
???????? }
??????? } catch (Exception e) {
??????????? e.printStackTrace();
??????? } finally {
??????????? if (null != in) {
??????????????? try {
??????????????????? in.close();
??????????????? } catch (IOException e) {
??????????????????? e.printStackTrace();
??????????????? }
??????????? }
??????????? if (null != out) {
??????????????? try {
??????????????????? out.close();
??????????????? } catch (IOException e) {
??????????????????? e.printStackTrace();
??????????????? }
??????????? }
??????? }
??? }
?/**
? * 从服务器上下载文件
? * @return
? * @throws Exception
? */
?public String downLoadFileInfo() throws Exception{
??logger.info("=============AttachmentsAction downLoadFileInfo=============");
??HttpServletRequest req = ServletActionContext.getRequest();
??this.setSuccess(true);
??HttpServletResponse response = ServletActionContext.getResponse();
??response.reset();
??String id = req.getParameter("id");
??if (id != null && (!id.equals(""))) {
???Attachments attachments = attachmentsManager.getAttachmentsInfoById(id);
??????????? //获得文件的绝对路径的前缀
??????????? String path = ServletActionContext.getServletContext().getRealPath(attachments.getAddress());
???//取得文件的后缀名
???String suffix = "";
???if (attachments.getName() != null && (!attachments.getName().equals("")))
????suffix = attachments.getName().substring(attachments.getName().lastIndexOf("."), attachments.getName().length());
??????????? //获得文件在服务器中的名字
??????????? String systemFileName = id + suffix;
??????????? //获得文件的在服务器上的绝对路径
??????????? String realPath = path + "\" + systemFileName;
??????????? //当文件名是中文时
??????????? //String downFileName = new String(attachments.getName().getBytes("ISO8859-1"), "UTF-8");//这里我不需要做这次转换
??????????? String downFileName = attachments.getName();
???//设置响应头和下载保存的文件名
???response.setContentType("application/msdownload;charset=UTF-8");
//这里就是解决中文名称文件下载的关键地方
???response.setHeader("Content-Disposition","attachment; filename="" + java.net.URLEncoder.encode(downFileName, "UTF-8"));
???//打开文件的输出流
???BufferedOutputStream? bufferedOutputStream? =? new? BufferedOutputStream(response.getOutputStream());
???this.downLoadFileFromSystem(realPath, bufferedOutputStream);
??}
???? return NONE;
?}
?
?/**
? * 从服务器上下载文件
? * @param realPath
? * @param bufferedOutputStream
? * @throws Exception
? */
?private void downLoadFileFromSystem(String realPath, BufferedOutputStream bufferedOutputStream) throws Exception{
??try {
???//打开指定文件的流信息
???FileInputStream fileInputStream = new FileInputStream(realPath);?
???int bytesRead = 0;
??????????? byte[] buffer = new byte[8192];
??????????? while ((bytesRead = fileInputStream.read(buffer, 0, 8192)) != -1) {
??????????? ?bufferedOutputStream.write(buffer,0,bytesRead);
??????????? }
??????????? fileInputStream.close();
??????????? bufferedOutputStream.close();
??} catch (Exception e) {
???? ?e.printStackTrace();
??}
??? }
?
?
}
?
4.这里所用到的commons-fileupload-1.1.1.jar。不能使用commons-fileupload-1.0.jar文件。。因为我们需要的是文件拦截器需要用到的是org.apache.commons.fileupload.servlet.servletfileupload.? 1.0的jar不支持。。
同时建议两个架包不要同时使用。
