jsp对上传文件的支持不象php中支持的那么好，直接做成了函数，也不象asp中要通过组件才能实现。jsp中可以通过javabean来实现。但是我们没有必要自己去写一个上载的bean，在网上已经有了很多成型的技术，smartupload就是其中的一个。但是smartupload是将文件先读到服务器的内存中，所以上传太大的文件（超过100兆）有可能会出问题，也算是一个美中不足-jsp upload files to support php support is not as good as a direct result of the function, not as in asp can be achieved through the components. jsp can be achieved through the JavaBean. But we do not need to write their own uploaded a bean, the Internet has been a lot of molding technology, smartupload is one. But smartupload is to first read the document server memory, so upload the file too big (more than 100 trillion) may have problems, it can be considered a fly in the ointment