{"id":13363,"date":"2024-03-15T06:54:36","date_gmt":"2024-03-15T06:54:36","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-is-the-flushbuffer-method-of-response-used-in-servlets\/"},"modified":"2025-08-05T17:07:10","modified_gmt":"2025-08-05T17:07:10","slug":"how-is-the-flushbuffer-method-of-response-used-in-servlets","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-is-the-flushbuffer-method-of-response-used-in-servlets\/","title":{"rendered":"Servlet flushBuffer() Method Guide"},"content":{"rendered":"

In Servlet, you can use the response.flushBuffer() method to force the response content to be flushed to the client. Once flushBuffer() is called, the container will immediately send the response header and body to the client, and no further modifications can be made to the response.<\/p>\n

The usage of the flushBuffer() method is as follows:<\/p>\n

    \n
  1. Response from the servlet<\/li>\n
  2. Please execute the doGet() method.<\/li>\n
  3. handle the post request<\/li>\n<\/ol>\n
    public<\/span> void<\/span> doGet<\/span>(HttpServletRequest request, HttpServletResponse response)<\/span>\r\n    throws<\/span> IOException, ServletException {\r\n    \/\/ \u83b7\u53d6ServletResponse\u5bf9\u8c61<\/span>\r\n    HttpServletResponse<\/span> httpServletResponse<\/span> =<\/span> (HttpServletResponse) response;\r\n}\r\n<\/code><\/pre>\n
      \n
    1. clearBuffer()<\/li>\n<\/ol>\n
      httpServletResponse.flushBuffer();\r\n<\/code><\/pre>\n
      Please take note:<\/p>\n
        \n
      1. The flushBuffer() method must be called before the response is committed, otherwise it will throw an IllegalStateException exception.<\/li>\n
      2. If the response has already been committed before the flushBuffer() method is called, the flushBuffer() method will not take effect.<\/li>\n
      3. The flushBuffer() method is commonly used when there is a need to immediately send the response to the client, for example in certain special scenarios that require real-time responses.<\/li>\n
      4. In most cases, there is no need to explicitly call the flushBuffer() method because the container will automatically handle response flushing and committing.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
        In Servlet, you can use the response.flushBuffer() method to force the response content to be flushed to the client. Once flushBuffer() is called, the container will immediately send the response header and body to the client, and no further modifications can be made to the response. The usage of the flushBuffer() method is as follows: […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[17784,17786,550,17785,17787],"class_list":["post-13363","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-flushbuffer","tag-http-response","tag-java-servlets","tag-response-handling","tag-servlet-programming"],"yoast_head":"\nServlet flushBuffer() Method Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to use response.flushBuffer() in Java Servlets to send responses to clients immediately after calling the method.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-is-the-flushbuffer-method-of-response-used-in-servlets\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Servlet flushBuffer() Method Guide\" \/>\n<meta property=\"og:description\" content=\"Learn how to use response.flushBuffer() in Java Servlets to send responses to clients immediately after calling the method.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-is-the-flushbuffer-method-of-response-used-in-servlets\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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