Servlet中Response的flushBuffer()是怎么用的？

2.Response的flushBuffer()的用法

马克-to-win:response有个buffer，flushBuffer()会强行把Buffer的 内容写到客户端浏览器。（Forces any content in the buffer to be written to the client. ），如果你不flushBuffer的话，当程序运行到最后的右大括号的时候，Tomcat也会把Response的Buffer的东西，一次性发给客户 端。这就是在我们前面的hello world Servlet的例子当中，没有加flushBuffer的原因。

例：3.2.1

package com;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class ServletHello1 extends HttpServlet {

protected void doGet(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

String myN = request.getParameter("myName");

PrintWriter pw = response.getWriter();

for (int i = 0; i < 5; i++) {

pw.println("back is " + myN);

/*下面两种flush方法的效果完全一样。后面的close方法针对他们俩都起效。

*/

// pw.flush();

response.flushBuffer();

try {

Thread.sleep(2000);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

/*上面的两种flush，只要加上下面一句close，之后的东西都打印不出来了。但也不报错。*/

// pw.close();

pw.println("Mark-to-win Finished");

}

}

浏览器里面的输出结果是：（一共打印了五遍。遍与遍的间隔是两秒。）

back is Mark-to-win back is Mark-to-win back is Mark-to-win back is Mark-to-win back is Mark-to-win Mark-to-win Finished

更多请看：https://blog.csdn.net/qq_44594371/article/details/103155478