今天在用struts2写下载文件的时候遇到getOutputStream()出现异常,和大家分享一下我的解决办法

[teny_yan]

使用struts2下载出错getOutputStream() has already been called for this response
报错: java.lang.IllegalStateException: getOutputStream() has already been called for this response的错误. Struts方法之间调用引起的。
因为：每个方法都返回的是一个ActionForward对象，而response是ActionForward对象参数，所以就会使response冲突！ 故,将最后的return "SUCCESS"改为 return null .不将其交由sturts管理.

public String exportxl() throws Exception {
		
		if (currentyear != 0) {
			HttpServletResponse response = ServletActionContext.getResponse();
			DownLoadUtils.downloadLocal(response, "EXP_"+currentyear+"_"+currentmonth);
		}
		return null; 
	}

[rosboy]

嗯，谢谢撸主，解决了我的问题