用 servlet 將jsp文件內容轉為html_JSP教程

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      推薦:JSP、Servlet中的相對路徑和絕對路徑
      JSP和Servlet中的絕對路徑和相對路徑問題困擾了我好幾天,經過努力之后將其部分心得和大家共享。 前提:假設你的Http地址為http://192.168.0.1/你的web應用為webapp,那么你的web應用

      用servlet將jsp文件內容轉為html。代碼如下:

      package examples;
      import java.io.ByteArrayOutputStream;
      import java.io.FileOutputStream;
      import java.io.IOException;
      import java.io.OutputStreamWriter;
      import java.io.PrintWriter;

      import javax.servlet.RequestDispatcher;
      import javax.servlet.ServletContext;
      import javax.servlet.ServletException;
      import javax.servlet.ServletOutputStream;
      import javax.servlet.http.HttpServlet;
      import javax.servlet.http.HttpServletRequest;
      import javax.servlet.http.HttpServletResponse;
      import javax.servlet.http.HttpServletResponseWrapper;

      public class ToHtml extends HttpServlet {
      private static final String CONTENT_TYPE = "text/html; charset=GBK";
      // Initialize global variables
      public void init() throws ServletException {
      }

      // Process the HTTP Get request
      public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
      response.setContentType(CONTENT_TYPE);
      service(request, response);
      /**
      * 只有成功初始化后此方法才能被調用處理用戶請求。前一個參數提供訪問初始請求數據的方法和字段,
      * 后一個提供servlet構造響應的方法。
      */
      }
      // Process the HTTP Post request
      public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
      doGet(request, response);
      }
      public void destroy() {
      }
      public void service(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {

      ServletContext sc = getServletContext();
      String url = "/index.jsp";

      String name = "index.htm"; // 這是生成的html文件名

      String pName = "e:\\Tomcat 5.5\\webapps\\jspTohtml\\index.htm"; // 生成html的完整路徑
      RequestDispatcher rd = sc.getRequestDispatcher(url);
      final ByteArrayOutputStream os = new ByteArrayOutputStream();
      final ServletOutputStream stream = new ServletOutputStream() {
      public void write(byte[] data, int offset, int length) {
      os.write(data, offset, length);
      }
      public void write(int b) throws IOException {
      os.write(b);
      }
      };
      final PrintWriter pw = new PrintWriter(new OutputStreamWriter(os));
      HttpServletResponse rep = new HttpServletResponseWrapper(response) {
      public ServletOutputStream getOutputStream() {
      return stream;
      }
      public PrintWriter getWriter() {
      return pw;
      }
      };
      rd.include(request, rep);
      pw.flush();
      FileOutputStream fos = new FileOutputStream(pName); // 把jsp輸出的內容寫到指定路徑的htm文件中
      os.writeTo(fos);
      fos.close();
      response.sendRedirect(name); // 書寫完畢后轉向htm頁面
      }
      }

      在web.xml文件中配置:

      < servlet> < servlet-name>Tohtml< /servlet-name> < servlet-class>examples.ToHtml< /servlet-class>< /servlet> < servlet-mapping> < servlet-name>Tohtml< /servlet-name> < url-pattern>/Tohtml< /url-pattern> < /servlet-mapping>

      下面是用來測試的index.jsp:

      < %@ page contentType="text/html; charset=gb2312" %>< html> < head> < title>Cache Filter Test< /title> < meta http-equiv="Content-Type" content="text/html; charset=gb2312"> < /head> < body>簡單測試:s=< % int s=0; // mock time-consuming code for (int i=0;i< 1000;i ) { for (int j=0;j< 1000;j ) { s=s j; } }out.print(s);%> < /body>< /html>

      分享:用 jspinclude 控制動態內容
      在新的 JSP 最佳實踐系列的前一篇文章中,您了解了如何使用 JSP include 偽指令將諸如頁眉、頁腳和導航組件之類的靜態內容包含到 Web 頁面中。和服務器端包含一樣,JSP include 偽指令允

      來源:模板無憂//所屬分類:JSP教程/更新時間:2008-08-22
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