任何网络连接都需要经过socket才能连接,HttpURLConnection不需要设置socket,所以,HttpURLConnection并不是底层的连接,而是在底层连接上的一个请求。...虽然底层的网络连接可以被多个HttpURLConnection实例共享,但每一个HttpURLConnection实例只能发送一个请求。...,故此处最好将其转化 // 为HttpURLConnection类型的对象,以便用到 // HttpURLConnection更多的API.如下: HttpURLConnection... httpUrlConnection = (HttpURLConnection) rulConnection; 设置HttpURLConnection参数 [java] view plain...// 设置是否从httpUrlConnection读入,默认情况下是true; httpUrlConnection.setDoInput(true); // Post 请求不能使用缓存
Android的HttpUrlConnection 项目结构: image.png activity_main.xml: <?xml version="1.0" encoding="utf-8"?...java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection...URL url = new URL("https://www.baidu.com/"); connection = (HttpURLConnection...java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.net.HttpURLConnection...URL url = new URL("https://www.baidu.com/"); connection = (HttpURLConnection
Android中提供的HttpURLConnection和HttpClient接口可以用来开发HTTP程序。...HttpURLConnection是继承于URLConnection类,二者都是抽象类。其对象主要通过URL的openConnection方法获得。...par=123456"); HttpURLConnection urlConn=(HttpURLConnection)url.openConnection(); 通过以下方法可以对请求的属性进行一些设置...默认使用GET方式,例如下面代码所示: //使用HttpURLConnection打开连接 HttpURLConnection urlConn = (HttpURLConnection...HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); //因为这个是post请求
HttpURLConnection 使用POST请求方式 new Thread(new Runnable() { @Override public...URL url = new URL(path); try { HttpURLConnection...urlConn = (HttpURLConnection) url.openConnection(); // 创建一个HTTP连接 urlConn.setRequestMethod...out.close(); //关闭数据输出流 if (urlConn.getResponseCode() == HttpURLConnection.HTTP_OK
在使用HTTPURLConnection发送POST数据时,通常使用如下方式: 1 byte[] body = new byte[512]; // 需要发送的body数据 2 URL url = new...URL(buildSpiderURL(host)); 3 HttpURLConnection conn = null; 4 try { 5 conn = (HttpURLConnection
如果想通过 HttpURLConnection 访问网站,网站返回cookie信息,下次再通过HttpURLConnection访问时,把网站返回 cookie信息再返回给该网站。可以使用下面代码。...Cookie实现机制 这样每次在调用HttpURLConnection访问网站的时候,通过CookieHandler.getDefault()方法获取CookieManager实例(静态的方法,全局都可用...throws Exception{ URL url = new URL("http://192.168.3.249:9000/webDemo/index.jsp"); HttpURLConnection...conn = (HttpURLConnection)url.openConnection(); String basic = Base64.getEncoder().encodeToString
java中可以使用3种方式调用api HttpURLConnection HttpClient RestTemplate 这里要讲的是HttpURLConnection的方式。...一.HttpURLConnection的介绍 HttpURLConnection标准Java接口(java.NET) —-HttpURLConnection,可以实现简单的基于URL请求、响应功能; HttpURLconnection...二.get请求的使用方法 HttpURLconnection是同步的请求,所以必须放在子线程中。...HttpURLConnection connection = (HttpURLConnection) url.openConnection(); //设置请求方式...代码如下: try { URL url = new URL(getUrl); HttpURLConnection connection = (HttpURLConnection) url.openConnection
HttpURLConnection继承了URLConnection,因此也能够向指定站点发送GET请求、POST请求。它在URLConnetion的基础上提供了例如以下便捷的方法。...@Override public void run() { try { URL httpUri = new URL(url); HttpURLConnection...conn = (HttpURLConnection) httpUri.openConnection(); conn.setReadTimeout(5000);...@Override public void run() { try { URL httpUri = new URL(url); HttpURLConnection...conn = (HttpURLConnection) httpUri.openConnection(); conn.setReadTimeout(5000);
HttpURLConnection: 每个 HttpURLConnection实例都可用于生成单个请求,但是其他实例可以透明地共享连接到 HTTP 服务器的基础网络。...请求后在 HttpURLConnection 的 InputStream 或 OutputStream 上调用 close() 方法可以释放与此实例关联的网络资源,但对共享的持久连接没有任何影响。...(由于javascript的同源策略导致的,同源就是两个页面有相同的协议、端口和主机),由于我们这边属于客户端,无法修改服务端代码,所以更改了请求方式,利用HttpURLConnection成功的解决跨域问题...1.生成HttpURLConnection对象 URL postUrl = new URL(url); HttpURLConnection conn = (HttpURLConnection)postUrl.openConnection...(); 创建URL对象,通过openConnection方法创建URLConnection对象并强制转化成HttpURLConnection对象 2.设置对应的方法参数,其中setRequestMethod
使用HttpURLConnection的方式模拟拼装HTTP请求 使用HttpClient(6.0已经废弃了HttpClient,但是还有有必要记录下) 本篇博客将主要记录第一种方式,下篇将记录第二种方式...try { // 实例化URL URL httpURL = new URL(url); // 打开连接 HttpURLConnection...connection = (HttpURLConnection) httpURL.openConnection(); /**设置connection属性 ,拼装HTTP请求协议
一、 HttpURLConnection以GET方式访问网络: HttpURLConnection connection = null; try { URL url = new URL("https:...//www.xxx.com/"); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod...= connection) { connection.disconnect(); } } 二、 HttpURLConnection以POST方式访问网络: HttpURLConnection connection...一般要用HttpURLConnection.getResponseCode() == 200来判断是否正常响应。为true则正常响应。 3....以上这篇Android 用HttpURLConnection访问网络的方法就是小编分享给大家的全部内容了,希望能给大家一个参考。
介绍 早些时候,Android 上发送 HTTP 请求一般有 2 种方式:HttpURLConnection 和 HttpClient。...因此,在这里我们只简单介绍HttpURLConnection 的使用。 代码 (核心部分,目前只演示 GET 请求): 1....connection = null; BufferedReader reader = null; try { //1.获取 HttpURLConnection 实例.注意要用 https...URL url = new URL("https://www.baidu.com"); connection = (HttpURLConnection) url.openConnection()...源码下载地址:HttpURLConnection 本例子参照《第一行代码 Android 第 2 版》 以上就是本文的全部内容,希望对大家的学习有所帮助。
HttpURLConnection 在android 2.2及以下版本中HttpUrlConnection存在着一些bug(建议使用HttpClient) 建议在android 2.3以后使用HttpUrlConnection...还增加了对缓存的支持 ---- HttpClient(不推荐使用了) 特点 • 高效稳定,但是维护成本高昂,故android 开发团队不愿意在维护该库而是转投更为轻便的 在android2.3之后就被HttpUrlConnection...Paste_Image.png HttpURLConnection请求:GET 核心代码 private void sendRequestWithHttpURLConnection() {...// 开启线程来发起网络请求 new Thread(new Runnable() { @Override public void run() { HttpURLConnection...null; try { // 获得URL对象 URL url = new URL("http://www.baidu.com/"); // 获得HttpURLConnection
ByteArrayOutputStream baos = null; try { URL url = new URL(requestUrl); HttpURLConnection...connection = (HttpURLConnection) url.openConnection(); // 设定请求的方法为"POST",默认是GET...读入,默认情况下是true; connection.setDoInput(true); // 设置是否向httpUrlConnection输出,如果是post...connection = (HttpURLConnection) url.openConnection(); // 设定请求的方法为"POST",默认是GET...读入,默认情况下是true; connection.setDoInput(true); // 设置是否向httpUrlConnection输出,如果是post
而是採用Java自带的HttpURLConnection实现的。...java.io.FileInputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection...formUpload(String urlStr, Map textMap, Map fileMap) { String res = ""; HttpURLConnection...123821742118716"; //boundary就是request头和上传文件内容的分隔符 try { URL url = new URL(urlStr); conn = (HttpURLConnection
java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection...HttpURLConnectionFactory { public static int DEFAULT_CONN_TIMEOUR = 30000; public static HttpURLConnection...getConn(String url) throws Throwable { HttpURLConnection conn = null; URL http = new...} }); conn = httpsConn; } else { conn = (HttpURLConnection...) http.openConnection(); } return conn; } public static String sendGet(HttpURLConnection
StringBuffer sbf = new StringBuffer(); try { URL url = new URL(u); HttpURLConnection...connection = (HttpURLConnection) url.openConnection(); connection.setDoInput(true);
参考链接 HttpURLConnection 设置Host 头部无效 如何在HttpURLConnection中覆盖http-header"Host”?
---- 前言 HttpURLConnection是一种多用途、轻量极的HTTP客户端。...httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setRequestMethod...if(httpURLConnection.getResponseCode() == 200){ InputStream is = httpURLConnection.getInputStream...httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setConnectTimeout...httpURLConnection.setUseCaches(false); //禁用缓存 httpURLConnection.setRequestMethod
相关文章 Android网络编程(一)HTTP协议原理 前言 上一篇我们了解了HTTP协议原理,这一篇我们来讲讲Apache的HttpClient和Java的HttpURLConnection,这两种都是我们平常请求网络会用到的
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