产品库动态 forward() 异常

[chenchongqi]

日志里很多这样的异常抛出：

java.lang.IllegalStateException?: forward() not allowed after buffer has committed.

我检查了一下，这个地方是否漏了个return？

			Matcher matcher=PATTERN_REGEX_COMMENT.matcher(requestUrl);
			if(matcher.find(0)){
				StringBuffer newUrl=new StringBuffer(String.valueOf(fileNameMap.get("comment")));
				newUrl.append(matcher.group(1));
				newUrl.append(StringUtils.isEmpty(matcher.group(2))?"":"&type="+matcher.group(2));
				newUrl.append(StringUtils.isEmpty(matcher.group(4))?"":"&flag="+matcher.group(4));
				newUrl.append(StringUtils.isEmpty(matcher.group(6))?"":"&cmtid="+matcher.group(6));
				newUrl.append(StringUtils.isEmpty(matcher.group(8))?"":"&pageNo="+matcher.group(8));
				logger.info("pdlib 1 doFilter:newurl="+newUrl.toString());
				httpRequest.getRequestDispatcher(newUrl.toString()).forward(httpRequest, httpResponse);
			}

[yuanhuoqing]

经测试，加了return后异常消失，并已上线。
在response.sendRedirect()或response.setHeader("Location","")或 <jsp:forward page="" />前调用out.flush()方法，也会报java.lang.IllegalStateException?: forward() not allowed after buffer has committed.