java.lang.IllegalStateException: getOutputStream()
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif在tomcat5下jsp中出现此错误一般都是在jsp中使用了输出流（如输出图片验证码，文件下载等），http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif没有妥善处理好的原因。
正在装载数据……
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif具体的原因就是
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif在tomcat中jsp编译成servlet之后在函数_jspService(HttpServletRequest request, HttpServletResponse response)的最后
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif有一段这样的代码
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043893.gifhttp://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043971.giffinally ...{
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821044617.gif if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821044635.gif }
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif这里是在释放在jsp中使用的对象，会调用response.getWriter(),因为这个方法是和
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gifresponse.getOutputStream()相冲突的！所以会出现以上这个异常。
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif然后当然是要提出解决的办法，其实挺简单的（并不是和某些朋友说的那样--
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif将jsp内的所有空格和回车符号所有都删除掉），
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gif在使用完输出流以后调用以下两行代码即可：
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gifout.clear();
http://www.99inf.net/SoftwareDev/UploadFiles_9259/200707/20077821043273.gifout = pageContext.pushBody();
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