【经验记录】java.lang.IllegalStateException: getOutputStream() has already been called

【心得记录】java.lang.IllegalStateException: getOutputStream() has already been called
java.lang.IllegalStateException: getOutputStream() has already been called for this response 问题解决办法：

此类问题一般都是JSP页面使用了流，在代码后面加上如下两行代码即可

out.clear();  
out = pageContext.pushBody();