原生HttpClient详细使用示例

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;public class HttpClient { ???public static String doGet(String httpurl) { ???????HttpURLConnection connection = null; ???????InputStream is = null; ???????BufferedReader br = null; ???????String result = null;// 返回结果字符串 ???????try { ???????????// 创建远程url连接对象 ???????????URL url = new URL(httpurl); ???????????// 通过远程url连接对象打开一个连接，强转成httpURLConnection类 ???????????connection = (HttpURLConnection) url.openConnection(); ???????????// 设置连接方式：get ???????????connection.setRequestMethod("GET"); ???????????// 设置连接主机服务器的超时时间：15000毫秒 ???????????connection.setConnectTimeout(15000); ???????????// 设置读取远程返回的数据时间：60000毫秒 ???????????connection.setReadTimeout(60000); ???????????// 发送请求 ???????????connection.connect(); ???????????// 通过connection连接，获取输入流 ???????????if (connection.getResponseCode() == 200) { ???????????????is = connection.getInputStream(); ???????????????// 封装输入流is，并指定字符集 ???????????????br = new BufferedReader(new InputStreamReader(is, "UTF-8")); ???????????????// 存放数据 ???????????????StringBuffer sbf = new StringBuffer(); ???????????????String temp = null; ???????????????while ((temp = br.readLine()) != null) { ???????????????????sbf.append(temp); ???????????????????sbf.append("\r\n"); ???????????????} ???????????????result = sbf.toString(); ???????????} ???????} catch (MalformedURLException e) { ???????????e.printStackTrace(); ???????} catch (IOException e) { ???????????e.printStackTrace(); ???????} finally { ???????????// 关闭资源 ???????????if (null != br) { ???????????????try { ???????????????????br.close(); ???????????????} catch (IOException e) { ???????????????????e.printStackTrace(); ???????????????} ???????????} ???????????if (null != is) { ???????????????try { ???????????????????is.close(); ???????????????} catch (IOException e) { ???????????????????e.printStackTrace(); ???????????????} ???????????} ???????????connection.disconnect();// 关闭远程连接 ???????} ???????return result; ???} ???public static String doPost(String httpUrl, String param) { ???????HttpURLConnection connection = null; ???????InputStream is = null; ???????OutputStream os = null; ???????BufferedReader br = null; ???????String result = null; ???????try { ???????????URL url = new URL(httpUrl); ???????????// 通过远程url连接对象打开连接 ???????????connection = (HttpURLConnection) url.openConnection(); ???????????// 设置连接请求方式 ???????????connection.setRequestMethod("POST"); ???????????// 设置连接主机服务器超时时间：15000毫秒 ???????????connection.setConnectTimeout(15000); ???????????// 设置读取主机服务器返回数据超时时间：60000毫秒 ???????????connection.setReadTimeout(60000); ???????????// 默认值为：false，当向远程服务器传送数据/写数据时，需要设置为true ???????????connection.setDoOutput(true); ???????????// 默认值为：true，当前向远程服务读取数据时，设置为true，该参数可有可无 ???????????connection.setDoInput(true); ???????????// 设置传入参数的格式:请求参数应该是 name1=value1&name2=value2 的形式。 ???????????connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); ???????????// 设置鉴权信息：Authorization: Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0 ???????????connection.setRequestProperty("Authorization", "Bearer da3efcbf-0845-4fe3-8aba-ee040be542c0"); ???????????// 通过连接对象获取一个输出流 ???????????os = connection.getOutputStream(); ???????????// 通过输出流对象将参数写出去/传输出去,它是通过字节数组写出的 ???????????os.write(param.getBytes()); ???????????// 通过连接对象获取一个输入流，向远程读取 ???????????if (connection.getResponseCode() == 200) { ???????????????is = connection.getInputStream(); ???????????????// 对输入流对象进行包装:charset根据工作项目组的要求来设置 ???????????????br = new BufferedReader(new InputStreamReader(is, "UTF-8")); ???????????????StringBuffer sbf = new StringBuffer(); ???????????????String temp = null; ???????????????// 循环遍历一行一行读取数据 ???????????????while ((temp = br.readLine()) != null) { ???????????????????sbf.append(temp); ???????????????????sbf.append("\r\n"); ???????????????} ???????????????result = sbf.toString(); ???????????} ???????} catch (MalformedURLException e) { ???????????e.printStackTrace(); ???????} catch (IOException e) { ???????????e.printStackTrace(); ???????} finally { ???????????// 关闭资源 ???????????if (null != br) { ???????????????try { ???????????????????br.close(); ???????????????} catch (IOException e) { ???????????????????e.printStackTrace(); ???????????????} ???????????} ???????????if (null != os) { ???????????????try { ???????????????????os.close(); ???????????????} catch (IOException e) { ???????????????????e.printStackTrace(); ???????????????} ???????????} ???????????if (null != is) { ???????????????try { ???????????????????is.close(); ???????????????} catch (IOException e) { ???????????????????e.printStackTrace(); ???????????????} ???????????} ???????????// 断开与远程地址url的连接 ???????????connection.disconnect(); ???????} ???????return result; ???}}

import java.util.Date;public class Main { ???public static void main(String[] args) { ???????str = HttpClient.doPost("https://www.baidu.com?tstmp="+Math.random(),"p=1"); ???????System.out.println(str); ???}}