package com.jtools;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.net.ConnectException;import java.net.HttpURLConnection;import java.net.URL;import javax.net.ssl.HttpsURLConnection;import javax.net.ssl.SSLContext;import javax.net.ssl.SSLSocketFactory;import javax.net.ssl.TrustManager;/** * http工具类 * @author json_wang*/public class HttpUtil {	/**	 * 发起http请求并获取结果	 * @param requestUrl 请求地址	 * @param requestMethod 请求方式（GET、POST）	 * @param outputStr 提交的数据       格式（例子："name=name&age=age"）  // 正文，正文内容其实跟get的URL中 ‘? ‘后的参数字符串一致	 * @return json字符串（json格式不确定 可能是JSONObject，也可能是JSONArray，这里用字符串，在controller里再转化）	 */	public static String httpRequest(String requestUrl, String requestMethod, String outputStr) {		String resultStr = "";		StringBuffer buffer = new StringBuffer();		try {			URL url = new URL(requestUrl);			HttpURLConnection httpUrlConn = (HttpURLConnection) url.openConnection();			httpUrlConn.setDoOutput(true);			httpUrlConn.setDoInput(true);			httpUrlConn.setUseCaches(false);			// 设置请求方式（GET/POST）			httpUrlConn.setRequestMethod(requestMethod);			//HttpURLConnection是基于HTTP协议的，其底层通过socket通信实现。如果不设置超时（timeout），在网络异常的情况下，可能会导致程序僵死而不继续往下执行			httpUrlConn.setConnectTimeout(30*1000);//30s超时			httpUrlConn.setReadTimeout(10*1000);//10s超时			/*			//设置请求属性    			httpUrlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");     			httpUrlConn.setRequestProperty("Charset", "UTF-8");		    */	        			//HttpURLConnection的connect()函数，实际上只是建立了一个与服务器的tcp连接，并没有实际发送http请求。			//get方式需要显式连接			if ("GET".equalsIgnoreCase(requestMethod)){				httpUrlConn.connect();			}						//这种post方式，隐式自动连接			// 当有数据需要提交时			if (null != outputStr) {				OutputStream outputStream = httpUrlConn.getOutputStream();				// 注意编码格式，防止中文乱码				outputStream.write(outputStr.getBytes("UTF-8"));				outputStream.close();			}			// 将返回的输入流转换成字符串			InputStream inputStream = httpUrlConn.getInputStream();			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);			String str = null;			while ((str = bufferedReader.readLine()) != null) {				buffer.append(str);			}			bufferedReader.close();			inputStreamReader.close();			// 释放资源			inputStream.close();			inputStream = null;			httpUrlConn.disconnect();						resultStr = buffer.toString();		} catch (ConnectException ce) {			System.out.println("server connection timed out.");		} catch (Exception e) {			System.out.println(requestUrl+" request error:\n"+e);		}		return resultStr;	}		/**	 * 发起https请求并获取结果	 * 	 * @param requestUrl 请求地址	 * @param requestMethod 请求方式（GET、POST）	 * @param outputStr 提交的数据       格式（例子："name=name&age=age"）  // 正文，正文内容其实跟get的URL中 ‘? ‘后的参数字符串一致	 * @return json字符串（json格式不确定 可能是JSONObject，也可能是JSONArray，这里用字符串，在controller里再转化）	 */	public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) {		String resultStr = "";		StringBuffer buffer = new StringBuffer();		try {			// 创建SSLContext对象，并使用我们指定的信任管理器初始化			TrustManager[] tm = { new MyX509TrustManager() };			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");			sslContext.init(null, tm, new java.security.SecureRandom());			// 从上述SSLContext对象中得到SSLSocketFactory对象			SSLSocketFactory ssf = sslContext.getSocketFactory();			URL url = new URL(requestUrl);			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();			httpUrlConn.setSSLSocketFactory(ssf);						httpUrlConn.setDoOutput(true);			httpUrlConn.setDoInput(true);			httpUrlConn.setUseCaches(false);						// 设置请求方式（GET/POST）			httpUrlConn.setRequestMethod(requestMethod);			//HttpURLConnection是基于HTTP协议的，其底层通过socket通信实现。如果不设置超时（timeout），在网络异常的情况下，可能会导致程序僵死而不继续往下执行			httpUrlConn.setConnectTimeout(30*1000);//30s超时			httpUrlConn.setReadTimeout(10*1000);//10s超时			/*			//设置请求属性    			httpUrlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");     			httpUrlConn.setRequestProperty("Charset", "UTF-8");		    */	        			//HttpURLConnection的connect()函数，实际上只是建立了一个与服务器的tcp连接，并没有实际发送http请求。			//get方式需要显式连接			if ("GET".equalsIgnoreCase(requestMethod)){				httpUrlConn.connect();			}						//这种post方式，隐式自动连接			// 当有数据需要提交时			if (null != outputStr) {				OutputStream outputStream = httpUrlConn.getOutputStream();				// 注意编码格式，防止中文乱码				outputStream.write(outputStr.getBytes("UTF-8"));				outputStream.close();			}			// 将返回的输入流转换成字符串			InputStream inputStream = httpUrlConn.getInputStream();			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);			String str = null;			while ((str = bufferedReader.readLine()) != null) {				buffer.append(str);			}			bufferedReader.close();			inputStreamReader.close();			// 释放资源			inputStream.close();			inputStream = null;			httpUrlConn.disconnect();						resultStr = buffer.toString();		} catch (ConnectException ce) {			System.out.println("server connection timed out.");		} catch (Exception e) {			System.out.println(requestUrl+" request error:\n"+e);		}		return resultStr;	}		public static void main(String[] args) {		System.out.println(httpRequest("https://www.zhihu.com/", "GET", null));	}	}

package com.jtools;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import javax.net.ssl.X509TrustManager;/** * 证书信任管理器（用于https请求） */public class MyX509TrustManager implements X509TrustManager {	public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {	}	public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {	}	public X509Certificate[] getAcceptedIssuers() {		return null;	}}