Java NIO SocketChannel读

今天药忘吃喽~ 2023-10-18 15:13 90阅读 0赞

以读取百度的首页内容为例：

import java.net.InetAddress;
    import java.net.InetSocketAddress;
    import java.nio.ByteBuffer;
    import java.nio.channels.SocketChannel;
    
    public class SocketTest {
    	public static void main(String[] args) {
    		try {
    			SocketTest test = new SocketTest();
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    
    	public SocketTest() throws Exception {
    		SocketChannel socketChannel = SocketChannel.open();
    		socketChannel.configureBlocking(true);
    
    		String url = "www.baidu.com";
    		InetAddress inetAddress = InetAddress.getByName(url);
    		boolean isConnect = socketChannel.connect(new InetSocketAddress(inetAddress.getHostAddress(), 80));
    
    		if (isConnect) {
    			System.out.println("连接建立" + socketChannel.getRemoteAddress());
    
    			int count = doGet(socketChannel, url);
    			System.out.println("写入数据数量:" + count);
    
    			readDataFromServer(socketChannel);
    		}
    	}
    
    	private void readDataFromServer(SocketChannel socketChannel) throws Exception {
    		int read = 0;
    		ByteBuffer buffer = ByteBuffer.allocate(1024);
    
    		while (true) {
    			buffer.clear();
    
    			System.out.print("开始读...");
    			read = socketChannel.read(buffer);
    			System.out.print("读完成");
    			if (read == -1) {
    				break;
    			}
    
    			System.out.print(new String(buffer.array(), 0, read, "UTF-8"));
    
    			Thread.sleep(10);
    		}
    
    		System.out.println("\n#结束#");
    	}
    
    	private int doGet(SocketChannel socketChannel, String url) throws Exception {
    		StringBuilder sb = new StringBuilder();
    		sb.append("GET / HTTP/1.1\r\n");
    		sb.append("Host: " + url + "\r\n");
    		sb.append("\r\n");
    
    		ByteBuffer buffer = ByteBuffer.wrap(sb.toString().getBytes("UTF-8"));
    		int bytesWrite = socketChannel.write(buffer);
    		return bytesWrite;
    	}
    }

运行后输出：

连接建立/180.97.33.108:80
    写入数据数量:39
    开始读...读完成HTTP/1.1 200 OK
    Accept-Ranges: bytes
    Cache-Control: no-cache
    Connection: Keep-Alive
    Content-Length: 14615
    Content-Type: text/html
    Date: Wed, 06 Mar 2019 07:55:01 GMT
    Etag: "5c73a860-3917"
    Last-Modified: Mon, 25 Feb 2019 08:33:36 GMT
    P3p: CP=" OTI DSP COR IVA OUR IND COM "
    Pragma: no-cache
    Server: BWS/1.1
    Set-Cookie: BAIDUID=2942644B4B0D329F278A3603CAFF7C48:FG=1; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com
    Set-Cookie: BIDUPSID=2942644B4B0D329F278A3603CAFF7C48; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com
    Set-Cookie: PSTM=1551858901; expires=Thu, 31-Dec-37 23:55:55 GMT; max-age=2147483647; path=/; domain=.baidu.com
    Vary: Accept-Encoding
    X-Ua-Compatible: IE=Edge,chrome=1
    
    <!DOCTYPE html>
    <html>
    <head>
    	<meta http-equiv="content-type" content="text/html;charset=utf-8">
    	<meta http-equiv="X-UA-Compatible" content="IE=Edge">
    	<link rel="dns-prefetch" href="//s1.bdstatic.com"/>
    	<link rel="dns-prefetc开始读...读完成h" href="//t1.baidu.com"/>
    	<link rel="dns-prefetch" href="//t2.baidu.com"/>
    	<link rel="dns-prefetch" href="//t3.baidu.com"/>
    	<link rel="dns-prefetch" href="//t10.baidu.com"/>
    	<link rel="dns-prefetch" href="//t11.baidu.com"/>
    	<link rel="dns-prefetch" href="//t12.baidu.com"/>
    	<link rel="dns-prefetch" href="//b1.bdstatic.com"/>
    	<title>百度一下，你就知道</title>
    	<link href="http://s1.bdstatic.com/r/www/cache/static/home/css/index.css" rel="stylesheet" type="text/css" />
    	
    	
    	<script>var hashMatch = document.location.href.match(/#+(.*wd=[^&].+)/);if (hashMatch && hashMatch[0] && hashMatch[1]) {document.location.replace("http://"+location.host+"/s?"+hashMatch[1]);}var ns_c = function(){};</script>
    	<script>function h(obj){obj.style.behavior='url(#default#homepage)';var a = obj.setHomePa开始读...读完成ge('//www.baidu.com/');}</script>
    	<noscript><meta http-equiv="refresh" content="0; url=/baidu.html?from=noscript"/></noscript>
    	<script>window._ASYNC_START=new Date().getTime();</script>
    </head>
    <body link="#0000cc"><div id="wrapper" style="display:none;"><div id="u"><a href="//www.baidu.com/gaoji/preferences.html"  onmousedown="return user_c({'fm':'set','tab':'setting','login':'0'})">搜索设置</a>|<a id="btop" href="/"  onmousedown="return user_c({'fm':'set','tab':'index','login':'0'})">百度首页</a>|<a id="lb" href="https://passport.baidu.com/v2/?login&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2F" onclick="return false;"  onmousedown="return user_c({'fm':'set','tab':'login'})">登录</a><a href="https://passport.baidu.com/v2/?reg&regType=1&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2F"  onmousedown="return user_c({'fm':'set','tab':'reg'})" target="_blank" class="reg">注册</a></div><div id="head"><div class="s_nav"><a href="/" class="s_logo" onmousedown="return c({'fm':'tab','tab':'logo'})"><img src="//www.b开始读...读完成aidu.com/img/baidu_jgylogo3.gif" width="117" height="38" border="0" alt="到百度首页" title="到百度首页"></a><div class="s_tab" id="s_tab"><a href="http://news.baidu.com/ns?cl=2&rn=20&tn=news&word=" wdfield="word"  onmousedown="return c({'fm':'tab','tab':'news'})">新闻</a>　<b>网页</b>　<a href="http://tieba.baidu.com/f?kw=&fr=wwwt" wdfield="kw"  onmousedown="return c({'fm':'tab','tab':'tieba'})">贴吧</a>　<a href="http://zhidao.baidu.com/q?ct=17&pn=0&tn=ikaslist&rn=10&word=&fr=wwwt" wdfield="word"  onmousedown="return c({'fm':'tab','tab':'zhidao'})">知道</a>　<a href="http://music.baidu.com/search?fr=ps&key=" wdfield="key"  onmousedown="return c({'fm':'tab','tab':'music'})">音乐</a>　<a href="http://image.baidu.com/i?tn=baiduimage&ps=1&ct=201326592&lm=-1&cl=2&nc=1&word=" wdfield="word"  onmousedown="return c({'fm':'tab','tab':'pic'})">图片</a>　<a href="http://v.baidu.com/v?ct=301989888&rn=20&pn=0&db=0&s=25&word=" wdfield="word"   onmousedown="return c开始读...读完成({'fm':'tab','tab':'video'})">视频</a>　<a href="http://map.baidu.com/m?word=&fr=ps01000" wdfield="word"  onmousedown="return c({'fm':'tab','tab':'map'})">地图</a>　<a href="http://wenku.baidu.com/search?word=&lm=0&od=0" wdfield="word"  onmousedown="return c({'fm':'tab','tab':'wenku'})">文库</a>　<a href="//www.baidu.com/more/"  onmousedown="return c({'fm':'tab','tab':'more'})">更多?</a></div></div><form id="form" name="f" action="/s" class="fm" ><input type="hidden" name="ie" value="utf-8"><input type="hidden" name="f" value="8"><input type="hidden" name="rsv_bp" value="1"><span class="bg s_ipt_wr"><input name="wd" id="kw" class="s_ipt" value="" maxlength="100"></span><span class="bg s_btn_wr"><input type="submit" id="su" value="百度一下" class="bg s_btn" onmousedown="this.className='bg s_btn s_btn_h'" onmouseout="this.className='bg s_btn'"></span><span class="tools"><span id="mHolder"><div id="mCon"><span>输入法</span></div><ul id="mMenu"><li><a href="javascript:;" name="im开始读...读完成e_hw">手写</a></li><li><a href="javascript:;" name="ime_py">拼音</a></li><li class="ln"></li><li><a href="javascript:;" name="ime_cl">关闭</a></li></ul></span><span class="shouji"><strong>推荐 : </strong><a href="http://w.x.baidu.com/go/mini/8/10000020" onmousedown="return ns_c({'fm':'behs','tab':'bdbrowser'})">百度浏览器，打开网页快2秒！</a></span></span></form></div><div id="content"><div id="u1"><a href="http://news.baidu.com" name="tj_trnews" class="mnav">新闻</a><a href="http://www.hao123.com" name="tj_trhao123" class="mnav">hao123</a><a href="http://map.baidu.com" name="tj_trmap" class="mnav">地图</a><a href="http://v.baidu.com" name="tj_trvideo" class="mnav">视频</a><a href="http://tieba.baidu.com" name="tj_trtieba" class="mnav">贴吧</a><a href="https://passport.baidu.com/v2/?login&tpl=mn&u=http%3A%2F%2Fwww.baidu.com%2F" name="tj_login" id="lb" onclick="return false;">登录</a><a href="//www.baidu.com/gaoji/preferences.html" name="tj_settingicon" id="pf">设置</开始读...读完成a><a href="//www.baidu.com/more/" name="tj_briicon" id="bri">更多产品</a></div><div id="m"><p id="lg"><img src="//www.baidu.com/img/bd_logo.png" width="270" height="129"></p><p id="nv"><a href="http://news.baidu.com">新 闻</a>　<b>网 页</b>　<a href="http://tieba.baidu.com">贴 吧</a>　<a href="http://zhidao.baidu.com">知 道</a>　<a href="http://music.baidu.com">音 乐</a>　<a href="http://image.baidu.com">图 片</a>　<a href="http://v.baidu.com">视 频</a>　<a href="http://map.baidu.com">地 图</a></p><div id="fm"><form id="form1" name="f1" action="/s" class="fm"><span class="bg s_ipt_wr"><input type="text" name="wd" id="kw1" maxlength="100" class="s_ipt"></span><input type="hidden" name="rsv_bp" value="0"><input type=hidden name=ch value=""><input type=hidden name=tn value="baidu"><input type=hidden name=bar value=""><input type="hidden" name="rsv_spt" value="3"><input type="hidden" name="ie" value="utf-8"><span class="bg s_btn_wr"><input type="s开始读...读完成ubmit" value="百度一下" id="su1" class="bg s_btn" onmousedown="this.className='bg s_btn s_btn_h'" onmouseout="this.className='bg s_btn'"></span></form><span class="tools"><span id="mHolder1"><div id="mCon1"><span>输入法</span></div></span></span><ul id="mMenu1"><div class="mMenu1-tip-arrow"><em></em><ins></ins></div><li><a href="javascript:;" name="ime_hw">手写</a></li><li><a href="javascript:;" name="ime_py">拼音</a></li><li class="ln"></li><li><a href="javascript:;" name="ime_cl">关闭</a></li></ul></div><p id="lk"><a href="http://baike.baidu.com">百科</a>　<a href="http://wenku.baidu.com">文库</a>　<a href="http://www.hao123.com">hao123</a><span> | <a href="//www.baidu.com/more/">更多>></a></span></p><p id="lm"></p></div></div><div id="ftCon"><div id="ftConw"><p id="lh"><a id="seth" onClick="h(this)" href="/" onmousedown="return ns_c({'fm':'behs','tab':'homepage','pos':0})">把百度设为主页</a><a id="setf" href="//www.baidu.com/cache/sethelp/index.html" onmousedown=开始读...读完成"return ns_c({'fm':'behs','tab':'favorites','pos':0})" target="_blank">把百度设为主页</a><a onmousedown="return ns_c({'fm':'behs','tab':'tj_about'})" href="http://home.baidu.com">关于百度</a><a onmousedown="return ns_c({'fm':'behs','tab':'tj_about_en'})" href="http://ir.baidu.com">About Baidu</a></p><p id="cp">©2018 Baidu <a href="/duty/" name="tj_duty">使用百度前必读</a> 京ICP证030173号 <img src="http://s1.bdstatic.com/r/www/cache/static/global/img/gs_237f015b.gif"></p></div></div><div id="wrapper_wrapper"></div></div><div class="c-tips-container" id="c-tips-container"></div>
    <script>window.__async_strategy=2;</script>
    <script>var bds={se:{},su:{urdata:[],urSendClick:function(){}},util:{},use:{},comm : {domain:"http://www.baidu.com",ubsurl : "http://sclick.baidu.com/w.gif",tn:"baidu",queryEnc:"",queryId:"",inter:"",templateName:"baidu",sugHost : "http://suggestion.baidu.com/su",query : "",qid : "",cid : "",sid : "",indexSid : "",stoken : "",serverTime : "",user开始读...读完成 : "",username : "",loginAction : [],useFavo : "",pinyin : "",favoOn : "",curResultNum:"",rightResultExist:false,protectNum:0,zxlNum:0,pageNum:1,pageSize:10,newindex:0,async:1,maxPreloadThread:5,maxPreloadTimes:10,preloadMouseMoveDistance:5,switchAddMask:false,isDebug:false,ishome : 1},_base64:{domain : "http://b1.bdstatic.com/",b64Exp : -1,pdc : 0}};var name,navigate,al_arr=[];var selfOpen = window.open;eval("var open = selfOpen;");var isIE=navigator.userAgent.indexOf("MSIE")!=-1&&!window.opera;var E = bds.ecom= {};bds.se.mon = {'loadedItems':[],'load':function(){},'srvt':-1};try {bds.se.mon.srvt = parseInt(document.cookie.match(new RegExp("(^| )BDSVRTM=([^;]*)(;|$)"))[2]);document.cookie="BDSVRTM=;expires=Sat, 01 Jan 2000 00:00:00 GMT"; }catch(e){}</script>
    <script>if(!location.hash.match(/[^a-zA-Z0-9]wd=/)){document.getElementById("ftCon").style.display='block';document.getElementById("u1").style.display='block';document.getElementById("content").style.display='block';document.getElementById("wrapper").st开始读...读完成yle.display='block';setTimeout(function(){try{document.getElementById("kw1").focus();document.getElementById("kw1").parentNode.className += ' iptfocus';}catch(e){}},0);}</script>
    <script type="text/javascript" src="http://s1.bdstatic.com/r/www/cache/static/jquery/jquery-1.10.2.min_f2fb5194.js"></script>
    <script>(function(){var index_content = $('#content');var index_foot= $('#ftCon');var index_css= $('head [index]');var index_u= $('#u1');var result_u= $('#u');var wrapper=$("#wrapper");window.index_on=function(){index_css.insertAfter("meta:eq(0)");result_common_css.remove();result_aladdin_css.remove();result_sug_css.remove();index_content.show();index_foot.show();index_u.show();result_u.hide();wrapper.show();if(bds.su&&bds.su.U&&bds.su.U.homeInit){bds.su.U.homeInit();}setTimeout(function(){try{$('#kw1').get(0).focus();window.sugIndex.start();}catch(e){}},0);if(typeof initIndex=='function'){initIndex();}};window.index_off=function(){index_css.remove();index_content.hide();index_foot.hide();index_u.hide();resu开始读...读完成lt_u.show();result_aladdin_css.insertAfter("meta:eq(0)");result_common_css.insertAfter("meta:eq(0)");result_sug_css.insertAfter("meta:eq(0)");wrapper.show();};})();</script>
    <script>window.__switch_add_mask=1;</script>
    <script type="text/javascript" src="http://s1.bdstatic.com/r/www/cache/static/global/js/instant_search_newi_redirect1_20bf4036.js"></script>
    <script>initPreload();$("#u,#u1").delegate("#lb",'click',function(){try{bds.se.login.open();}catch(e){}});if(navigator.cookieEnabled){document.cookie="NOJS=;expires=Sat, 01 Jan 2000 00:00:00 GMT";}</script>
    <script>$(function(){for(i=0;i<3;i++){u($($('.s_ipt_wr')[i]),$($('.s_ipt')[i]),$($('.s_btn_wr')[i]),$($('.s_btn')[i]));}function u(iptwr,ipt,btnwr,btn){if(iptwr && ipt){iptwr.on('mouseover',function(){iptwr.addClass('ipthover');}).on('mouseout',function(){iptwr.removeClass('ipthover');}).on('click',function(){ipt.focus();});ipt.on('focus',function(){iptwr.addClass('iptfocus');}).on('blur',function(){iptwr.removeClass('iptfocus');}).on('render',funct开始读...读完成ion(e){var $s = iptwr.parent().find('.bdsug');var l = $s.find('li').length;if(l>=5){$s.addClass('bdsugbg');}else{$s.removeClass('bdsugbg');}});}if(btnwr && btn){btnwr.on('mouseover',function(){btn.addClass('btnhover');}).on('mouseout',function(){btn.removeClass('btnhover');});}}});</script>
    <script type="text/javascript" src="http://s1.bdstatic.com/r/www/cache/static/home/js/bri_7f1fa703.js"></script>
    <script>(function(){var _init=false;window.initIndex=function(){if(_init){return;}_init=true;var w=window,d=document,n=navigator,k=d.f1.wd,a=d.getElementById("nv").getElementsByTagName("a"),isIE=n.userAgent.indexOf("MSIE")!=-1&&!window.opera;(function(){if(/q=([^&]+)/.test(location.search)){k.value=decodeURIComponent(RegExp["\x241"])}})();(function(){var u = G("u1").getElementsByTagName("a"), nv = G("nv").getElementsByTagName("a"), lk = G("lk").getElementsByTagName("a"), un = "";var tj_nv = ["news","tieba","zhidao","mp3","img","video","map"];var tj_lk = ["baike","wenku","hao123","more"];un = bds.comm.user == "开始读...读完成" ? "" : bds.comm.user;function _addTJ(obj){addEV(obj, "mousedown", function(e){var e = e || window.event;var target = e.target || e.srcElement;if(target.name){ns_c({'fm':'behs','tab':target.name,'un':encodeURIComponent(un)});}});}for(var i = 0; i < u.length; i++){_addTJ(u[i]);}for(var i = 0; i < nv.length; i++){nv[i].name = 'tj_' + tj_nv[i];}for(var i = 0; i < lk.length; i++){lk[i].name = 'tj_' + tj_lk[i];}})();(function() {var links = {'tj_news': ['word', 'http://news.baidu.com/ns?tn=news&cl=2&rn=20&ct=1&ie=utf-8'],'tj_tieba': ['kw', 'http://tieba.baidu.com/f?ie=utf-8'],'tj_zhidao': ['word', 'http://zhidao.baidu.com/search?pn=0&rn=10&lm=0'],'tj_mp3': ['key', 'http://music.baidu.com/search?fr=ps&ie=utf-8'],'tj_img': ['word', 'http://image.baidu.com/i?ct=201326592&cl=2&nc=1&lm=-1&st=-1&tn=baiduimage&istype=2&fm=&pv=&z=0&ie=utf-8'],'tj_video': ['word', 'http://video.baidu.com/v?ct=301989888&s=25&ie=utf-8'],'tj_map': ['wd', 'http://map.baidu.com/?newmap=1&ie=utf-8&s=s'],'tj_baike': ['word', 'http://baike.baidu.开始读...读完成com/search/word?pic=1&sug=1&enc=utf8'],'tj_wenku': ['word', 'http://wenku.baidu.com/search?ie=utf-8']};var domArr = [G('nv'), G('lk'),G('cp')],kw = G('kw1');for (var i = 0, l = domArr.length; i < l; i++) {domArr[i].onmousedown = function(e) {e = e || window.event;var target = e.target || e.srcElement,name = target.getAttribute('name'),items = links[name],reg = new RegExp('^\\s+|\\s+\x24'),key = kw.value.replace(reg, '');if (items) {if (key.length > 0) {var wd = items[0], url = items[1],url = url + ( name === 'tj_map' ? encodeURIComponent('&' + wd + '=' + key) : ( ( url.indexOf('?') > 0 ? '&' : '?' ) + wd + '=' + encodeURIComponent(key) ) );target.href = url;} else {target.href = target.href.match(new RegExp('^http:\/\/.+\.baidu\.com'))[0];}}name && ns_c({'fm': 'behs','tab': name,'query': encodeURIComponent(key),'un': encodeURIComponent(bds.comm.user || '') });};}})();};if(window.pageState==0){initIndex();}})();document.cookie = 'IS_STATIC=1;expires=' + new Date(new Date().getTime() + 10*60*1000).toGMTString()开始读...读完成;</script>
    </body></html>
    开始读...读完成
    #结束#