commons-fileupload.jar上传文件时出错

异常1:
the request doesn't contain a multipart/form-data or multipart/mixed stream, content type header is application/x-www-form-urlencoded 
处理方式:
<form name="Form1" enctype="multipart/form-data" method="post" action="File.jsp">
.....
</form>

异常2:
java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream
org.apache.commons.fileupload.DefaultFileItemFactory.createItem(DefaultFileItemFactory.java:103)
org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:350)
org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:302)
处理方式：
增加 commons-io.jar包
下载地址：http://apache.justdn.org/jakarta/commons/io/binaries/