• 时事博文
  • 文化时尚
  • 潮流娱乐
  • 生活常识
  • 健康生活
  • 旅游攻略
  • 体育风云
  • 财经博文
  • 汽车频道
  • 科技
  • 游戏
  • 女人
  • 互联网
  • 军事博览
  • 个性推荐
  • 当前位置: 精彩博文网 > 个性推荐 > 正文

    jsp和servlet的区别 用servlet将jsp文件内容转为html

    时间:2018-08-15 16:34:49 来源:精彩博文网 本文已影响 精彩博文网手机站

    用servlet将jsp文件内容转为html。代码如下:

    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调用处理用户请求。前一个参数提供访问初始请求数据的方法和字段,

    * 后一个提供servlet构造响应的方法。

    */

    }

    // 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"; // 这是生成的html文件名

    String pName = "e:Tomcat 5.5webappsjspTohtmlindex.htm"; // 生成html的完整路径

    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输出的内容写到指定路径的htm文件中

    os.writeTo(fos);

    fos.close();

    response.sendRedirect(name); // 书写完毕后转向htm页面

    }

    }

    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>

    下面是用来测试的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>简单测试: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>

    • 时事博文
    • 文化时尚
    • 潮流娱乐
    • 科技
    • 游戏
    • 女人
    • 个性推荐