FileUploadBase$SizeLimitExceededException异常，出现原因：在struts core文件中default.propreties设置了上传文件的最大限制。上传文件超过这个限制就会报错。
方法1：重写struts core中的default.propreties文件。
方法2：struts.xml中加入<constant name="struts.multipart.maxsize" value="上传文件限制">
转载于:https://my.oschina.net/u/225084/blog/161040
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