用servlet將jsp檔案內容轉為htm

最後更新：2017-02-27 來源：互聯網

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用servlet將jsp檔案內容轉為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);  /** * 只有成功初始化後此方法才能被調用處理使用者請求。前一個參數提供訪問初始請求資料的方法和欄位，   * 後一個提供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"; // 這是產生的html檔案名稱  String pName = "e:\\Tomcat 5.5\\webapps\\jspTohtml\\index.htm"; 
// 產生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檔案中  os.writeTo(fos);  fos.close();  response.sendRedirect(name); // 書寫完畢後轉向htm頁面 }}在web.xml檔案中配置：<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>

效果圖：

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