Servlet缓冲Buffer应用实例

Servlet缓冲Buffer应用,在现在的编程语言中有大量的编辑缓存技术，当然java的buffer也算是一种了，下面我们来看看关于servlet buffer的二种方法。

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.net.*;

public class MyServlet extends HttpServlet {

public void doGet(HttpServletRequest req, HttpServletResponse res)
                               throws ServletException, IOException {
    res.setBufferSize(8 * 1024); // 8K buffer
    res.setContentType("text/html");
    PrintWriter out = res.getWriter();

    int size = res.getBufferSize(); // returns 8096 or greater

    // Record the default size, in the log
    log("The default buffer size is " + size);

    out.println("The client won't see this");
    res.reset();
    out.println("And this won't be seen if sendError() is called");
    if (req.getParameter("important_parameter") == null) {
      res.sendError(res.SC_BAD_REQUEST, "important_parameter needed");
    }
}
}

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
    "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>
    <servlet><servlet-name>MyServletName</servlet-name>
             <servlet-class>MyServlet</servlet-class>


    </servlet>

    <servlet-mapping><servlet-name>MyServletName</servlet-name>
        <url-pattern>/index.html</url-pattern>
    </servlet-mapping>
</web-app>

实例二

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;

public class MyServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse res)
                               throws ServletException, IOException {

    res.setContentType("text/html");

    // Ask for a 16K byte response buffer; do not set the content length
    res.setBufferSize(16 * 1024);

    PrintWriter out = res.getWriter();
    out.println("<HTML>");
    out.println("<HEAD><TITLE>Hello World</TITLE></HEAD>");
    out.println("<BODY>");
    out.println("<BIG>Less than 16K of response body</BIG>");
    out.println("</BODY></HTML>");
}
}

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"
    "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">

<web-app>
    <servlet><servlet-name>MyServletName</servlet-name>
             <servlet-class>MyServlet</servlet-class>


    </servlet>

    <servlet-mapping><servlet-name>MyServletName</servlet-name>
        <url-pattern>/index.html</url-pattern>
    </servlet-mapping>
</web-app>

补充：Jsp教程,Jsp/Servlet开发工具