/**
* 文件上传保存路径
*/
private static final String SAVE_FILEPATH = "/fileupload/";
/**
* 文件上传临时保存路径
*/
private static final String SAVE_FILE_TMPPATH = "/fileupload/tmp/";
/**
* 上传文件的最大值M
*/
private static final int MAX_FILE_SIZE = 100*1024*1024;
/**
* 文件数据在内存中超过多少M后，就写入临时文件
*/
private static final int THRESHOLD_SIZE = 2*1024*1024;
private static final String ENCODING = "UTF-8";
/**
* 处理文件上传的表单
* 下载文件，并返回文件名称及普通表单域中其它属性值
* 获取文件名
*/
public static Map<String,String> upload(HttpServletRequest request)throws Exception{
Map<String,String> params = new HashMap<String, String>();
String savePath = request.getSession().getServletContext()
.getRealPath(SAVE_FILEPATH)+ File.separator;
String savePathTemp = request.getSession().getServletContext()
.getRealPath(SAVE_FILE_TMPPATH)+ File.separator;
File saveFileTempDir = new File(savePathTemp);
DiskFileItemFactory factory = new DiskFileItemFactory();
//当内存中文件数据达到THRESHOLD_SIZE后，就写入临时文件中，避免上传大文件时，消化太多内存
factory.setSizeThreshold(THRESHOLD_SIZE);
factory.setRepository(saveFileTempDir);
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding(ENCODING);
upload.setSizeMax(MAX_FILE_SIZE);
FileUploadInfo fileUploadInfo = new FileUploadInfo();
upload.setProgressListener(new FileUploadListener(fileUploadInfo));
request.getSession().setAttribute("uploadInfo", fileUploadInfo);
List items = upload.parseRequest(request);
Iterator iter = items.iterator();
int fileNum = 1;
while(iter.hasNext()){
FileItem item = (FileItem) iter.next();
if (item.isFormField()) {//普通表单域
params.put(item.getFieldName(), item.getString());
} else {
String fileName = item.getName().replace("/", "");
int i = fileName.lastIndexOf("");
fileName = fileName.substring(i+1);
//避免重复
fileName = System.currentTimeMillis() + fileName;
File uploadedFile = new File(savePath + fileName);
item.write(uploadedFile);
params.put("fileName0"+fileNum, fileName);
fileNum ++;
}
}
return params;
}
}
class FileUploadListener implements ProgressListener{
FileUploadInfo fileUploadInfo = null;
public FileUploadListener(FileUploadInfo fileUploadInfo) {
this.fileUploadInfo = fileUploadInfo;
}
@Override
public void update(long uploadSize, long totalSize, int itemNum) {
