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关于 getWriter() has already been called for this response 的错误解决办法

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java.lang.IllegalStateException: getWriter() has already been called for this response

今天在做显示图片的时候，（用流从数据库读出来显示）遇到了这个错误，


java.lang.IllegalStateException: getWriter() has already been called for this response


使用了PrintWriter out = response.getWriter();


再次使用了ServletOutputStream out = response.getOutputStream();


可以在前面写一个response.reset(); 就没事了