getOutputStream() has already been called for this response

java 导出时报错

getOutputStream() has already been called for this response

因为我的源代码action中返回了一个ActionForward,而response是ActionForward对象参数,所以就会使response冲突! 只需要将返回值改为return null  或者是不返回ActionForward,照样还是能导出文件。问题解决了。

你可能感兴趣的:(导出)