commons-fileupload 多文件上传

<form action="upload/testupload" enctype="multipart/form-data"
method="post">
<input type="file" name="file" multiple="multiple" /><input
type="submit" value="submit" />
</form>

<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>

public final void upload() throws Exception {

final StringBuilder result = new StringBuilder();
final DiskFileItemFactory dfif = new DiskFileItemFactory();
final ServletFileUpload sfu = new ServletFileUpload(dfif);
// 对requests对象进行解析,并把表单中的每一个输入项包装成一个fileItem对象,并返回一个保存了所有FileItem的list集合.
final List<FileItem> fileItems = sfu.parseRequest(getRequest());
final Iterator<FileItem> iter = fileItems.iterator();
final String path = "F:/resources/Test/";
FileItem item = null;
String name = null;
int error = 0;
int length = 0;
// 设置内存缓冲区的大小,默认值为10K,如果文件大于10K,将使用临时文件缓存上传文件.
dfif.setSizeThreshold(10 * 1024);
dfif.setRepository(new File(path));
// 设置上传文件总量的最大值 500M
sfu.setSizeMax(500 * 1024 * 1024);
// 设置上传文件最大值 其中文件大小只要有一个超过 (100M) ,1024KB==1M 所有文件将不能上传
sfu.setFileSizeMax(100 * 1024 * 1024);
result.append("{\"files\":[");
while (iter.hasNext()) {
System.out.println(iter.hasNext());
item = iter.next();
if (!item.isFormField()) {
length++;
name = item.getName();
name = System.currentTimeMillis() + name.substring(name.lastIndexOf("."), name.length());
result.append("\"").append(name).append("\"").append(!iter.hasNext() ? "" : ",");
item.write(new File(path + name));
}
}
result.append("],\"error\":").append(error).append(",\"success\":").append(length - error)
.append(",\"path\":\"").append(path).append("\"}");
renderJson(result.toString());
}