目的想通过过滤器修改响应中的参数，发现包装后无法正常响应，从浏览器请求后浏览器一直在转圈圈持续很久

HttpServletResponseWrapper

public class Response2Wrapper extends HttpServletResponseWrapper {

    private ByteArrayOutputStream output;

    private ServletOutputStream filterOutput;

    public Response2Wrapper(HttpServletResponse response) {
        super(response);
        output = new ByteArrayOutputStream();
    }


    @Override
    public ServletOutputStream getOutputStream() throws IOException {
        if (filterOutput == null) {
            filterOutput = new ServletOutputStream() {
                @Override
                public void write(int b) throws IOException {
                    output.write(b);
                }

                @Override
                public boolean isReady() {
                    return false;
                }

                @Override
                public void setWriteListener(WriteListener writeListener) {
                }
            };
        }
        return filterOutput;
    }

    public byte[] toByteArray() {
        return output.toByteArray();
    }
}

ServletParamaterFilter

public class ServletParamaterFilter implements Filter {



    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain chain) throws IOException, ServletException {

        if (request instanceof HttpServletRequest && response instanceof HttpServletResponse) {
            System.out.println("=====ServletParamaterFilter=====");
            //转换成代理类
            Response2Wrapper wrapperResponse = new Response2Wrapper((HttpServletResponse) response);
            // 这里只拦截返回，直接让请求过去，如果在请求前有处理，可以在这里处理
            chain.doFilter(request, wrapperResponse);
            PrintWriter out = response.getWriter();
            //response.setContentLength("test".getBytes().length);
            out.write("test");
            out.flush();
            out.close();
        } else {
            chain.doFilter(request, response);
        }

    }

    @Override
    public void init(FilterConfig filterConfig) {
        System.out.println("ServletParamaterFilter初始化创建....");
    }


}

 通过不短的查找调试，原来是没有给包装后的response设置对应的内容长度

response.setContentLength("test".getBytes().length);

问题解决