Request processing failed; nested exception is java.lang.IllegalStateException: getOutputStream() has already been called for this response

問題分析:

      在ServletRequest servletRequest中已經存在一個項目名稱,此時,又用項目名稱訪問 http://localhost:8080/rent/pdf/preview rent這個名稱已經在Application.yml中設置了,

     這時會生成一個緩存在servletRequest中,訪問就會有重復的/rent,就會報錯

 

解決方案

                清空servletRequest中存在的/rent緩存

 @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException {

        HttpServletResponse response = (HttpServletResponse) servletResponse;

        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "x-requested-with,Content-Type,XFILENAME,XFILECATEGORY,XFILESIZE");

        logger.info("*********************************過濾器被使用**************************");
        try {
            filterChain.doFilter(servletRequest, servletResponse);
        } catch (IllegalStateException e) {
            servletRequest.getServletContext().removeAttribute("/rent");
        } catch (ServletException e) {
            e.printStackTrace();
        }

    }

  重點:

catch (IllegalStateException e) {
    servletRequest.getServletContext().removeAttribute("/rent");
}