getOutputStream() has already been called for this response
来源：互联网 发布：vb中static 编辑：程序博客网 时间：2024/05/29 14:10
action中用getOutputStream做下载时
不可以重复多次操作getOUtputStream
response这个封装的对象里面有个useingOutputStream标志,boolean型 所以就是根据这个来查getOutputStream()是否重复调用的
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