fileupload上传中文文件名时乱码问题(转)
原文地址：http://www.blogjava.net/duduli/archive/2008/11/11/239845.html
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昨天让这个乱码问题弄了很久，一大早就开始想要怎么解决才好。
很简单上传页面，jsp上传页面代码
????<form?action="/struts2/UploadServlet"?method="post"?enctype="multipart/form-data">?????????用户名：<input?type="text"?name="username"><br>????????密?码：<input?type="password"?name="password"><br>????????文件1:<input?type="file"?name="file1"><br>????????文件2:<input?type="file"?name="file2"><br>????????<input?type="submit"?value="提交">????</form>?下面是UploadServlet代码
@SuppressWarnings("serial")
public?class?UploadServlet?extends?HttpServlet?{
????@SuppressWarnings({?"unchecked",?"deprecation"?})????public?void?doPost(HttpServletRequest?request,?HttpServletResponse?response)????????????throws?ServletException,?IOException?{//????????????设置工厂????????????DiskFileItemFactory?factory?=?new?DiskFileItemFactory();????????????String?path?=?request.getRealPath("/upload");//????????????设置文件存储位置????????????factory.setRepository(new?File(path));//????????????设置大小，如果文件小于设置大小的话，放入内存中，如果大于的话则放入磁盘中????????????factory.setSizeThreshold(1024*1024);????????????????????????ServletFileUpload?upload?=?new?ServletFileUpload(factory);//????????????这里就是中文文件名处理的代码，其实只有一行，serheaderencoding就可以了????????????upload.setHeaderEncoding("utf-8");????????????/*String?enCoding?=?request.getCharacterEncoding();????????????if(enCoding?!=?null){????????????????upload.setHeaderEncoding(enCoding);
????????????}*/????????????????????????try?{????????????????List<FileItem>?list?=?upload.parseRequest(request);????????????????for(FileItem?item?:?list){//????????????????????判断是不是上传的文件，如果不是得到值，并设置到request域中//????????????????????这里的item.getfieldname是得到上传页面上的input上的name????????????????????if(item.isFormField()){????????????????????????String?name?=?item.getFieldName();????????????????????????String?value?=item.getString("utf-8");????????????????????????System.out.println(name);????????????????????????System.out.println(value);????????????????????????request.setAttribute(name,?value);????????????????????}//????????????????????如果是上传的文件，则取出文件名，????????????????????else{????????????????????????String?name?=?item.getFieldName();????????????????????????String?value?=?item.getName();????????????????????????System.out.println(name);????????????????????????System.out.println(value);//????????????????????????得到不要地址的文件名，不同的浏览器传递的参数不同，有的直接传递文件名，而又的把文件地址一起传递过来//????????????????????????使用substring方法可以统一得到文件名而不得到文件位置????????????????????????int?start?=?value.lastIndexOf("\");????????????????????????String?fileName?=?value.substring(start?+?1);????????????????????????request.setAttribute(name,?fileName);//????????????????????????写文件到path目录，文件名问filename????????????????????????item.write(new?File(path,fileName));????????????????????}????????????????}????????????}????????????????????catch?(FileUploadException?e)?{????????????????e.printStackTrace();????????????}?catch?(Exception?e)?{????????????????e.printStackTrace();????????????}//????????????跳转到显示结果页面????????????request.getRequestDispatcher("upload/result2.jsp").forward(request,?response);????}
}用EL表达式显示输出
1??<body>?????用户名：${requestScope.username?}?<br>?????密??码：${requestScope.password?}?<br>?????文件1?：${requestScope.file1?}<br>?????文件2?：${requestScope.file2?}<br>??</body>
其实很简单的设置就可以把中文件上传，并正确显示正确的中文文件名。
在网上找了一点资料，但是都写得很少，没有把完整的写出来。
所以把它写出来，让大家少走点弯路。
