标签：https
package io.renren.modules.jqr.util; import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLEncoder; import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import java.util.Map; import java.util.Map.Entry; import javax.net.ssl.HostnameVerifier; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSession; import javax.net.ssl.SSLSocketFactory; import javax.net.ssl.TrustManager; import javax.net.ssl.X509TrustManager; import org.springframework.util.StringUtils; /** * http、https 请求工具类 * * @author jiaxiaoxian * */ public class HttpUtils { private static final String DEFAULT_CHARSET = "UTF-8"; private static final String _GET = "GET"; // GET private static final String _POST = "POST";// POST public static final int DEF_CONN_TIMEOUT = 30000; public static final int DEF_READ_TIMEOUT = 30000; /** * 初始化http请求参数 * * @param url * @param method * @param headers * @return * @throws Exception */ private static HttpURLConnection initHttp(String url, String method, Map<String, String> headers) throws Exception { URL _url = new URL(url); HttpURLConnection http = (HttpURLConnection) _url.openConnection(); // 连接超时 http.setConnectTimeout(DEF_CONN_TIMEOUT); // 读取超时 --服务器响应比较慢，增大时间 http.setReadTimeout(DEF_READ_TIMEOUT); http.setUseCaches(false); http.setRequestMethod(method); http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); http.setRequestProperty( "User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36"); if (null != headers && !headers.isEmpty()) { for (Entry<String, String> entry : headers.entrySet()) { http.setRequestProperty(entry.getKey(), entry.getValue()); } } http.setDoOutput(true); http.setDoInput(true); http.connect(); return http; } /** * 初始化http请求参数 * * @param url * @param method * @return * @throws Exception */ private static HttpsURLConnection initHttps(String url, String method, Map<String, String> headers) throws Exception { TrustManager[] tm = { new MyX509TrustManager() }; System.setProperty("https.protocols", "TLSv1"); SSLContext sslContext = SSLContext.getInstance("TLS"); 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(url); HttpsURLConnection http = (HttpsURLConnection) _url.openConnection(); // 设置域名校验 http.setHostnameVerifier(new HttpUtils().new TrustAnyHostnameVerifier()); // 连接超时 http.setConnectTimeout(DEF_CONN_TIMEOUT); // 读取超时 --服务器响应比较慢，增大时间 http.setReadTimeout(DEF_READ_TIMEOUT); http.setUseCaches(false); http.setRequestMethod(method); http.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); http.setRequestProperty( "User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36"); if (null != headers && !headers.isEmpty()) { for (Entry<String, String> entry : headers.entrySet()) { http.setRequestProperty(entry.getKey(), entry.getValue()); } } http.setSSLSocketFactory(ssf); http.setDoOutput(true); http.setDoInput(true); http.connect(); return http; } /** * * @description 功能描述: get 请求 * @return 返回类型: * @throws Exception */ public static String get(String url, Map<String, String> params, Map<String, String> headers) throws Exception { HttpURLConnection http = null; if (isHttps(url)) { http = initHttps(initParams(url, params), _GET, headers); } else { http = initHttp(initParams(url, params), _GET, headers); } InputStream in = http.getInputStream(); BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET)); String valueString = null; StringBuffer bufferRes = new StringBuffer(); // 优化，不能光使用!=null做判断。有为""的情况，防止多次空循环 while (!StringUtils.isEmpty(valueString = read.readLine())) { bufferRes.append(valueString); } in.close(); if (http != null) { http.disconnect();// 关闭连接 } return bufferRes.toString(); } public static String get(String url) throws Exception { return get(url, null); } public static String get(String url, Map<String, String> params) throws Exception { return get(url, params, null); } public static String post(String url, String params) throws Exception { HttpURLConnection http = null; if (isHttps(url)) { http = initHttps(url, _POST, null); } else { http = initHttp(url, _POST, null); } OutputStream out = http.getOutputStream(); out.write(params.getBytes(DEFAULT_CHARSET)); out.flush(); out.close(); InputStream in = http.getInputStream(); BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET)); String valueString = null; StringBuffer bufferRes = new StringBuffer(); while ((valueString = read.readLine()) != null) { bufferRes.append(valueString); } in.close(); if (http != null) { http.disconnect();// 关闭连接 } return bufferRes.toString(); } public static String post(String url, String params,Map<String, String> headers) throws Exception { HttpURLConnection http = null; if (isHttps(url)) { http = initHttps(url, _POST, headers); } else { http = initHttp(url, _POST, headers); } OutputStream out = http.getOutputStream(); out.write(params.getBytes(DEFAULT_CHARSET)); out.flush(); out.close(); InputStream in = http.getInputStream(); BufferedReader read = new BufferedReader(new InputStreamReader(in, DEFAULT_CHARSET)); String valueString = null; StringBuffer bufferRes = new StringBuffer(); while ((valueString = read.readLine()) != null) { bufferRes.append(valueString); } in.close(); if (http != null) { http.disconnect();// 关闭连接 } return bufferRes.toString(); } /** * 功能描述: 构造请求参数 * * @return 返回类型: * @throws Exception */ public static String initParams(String url, Map<String, String> params) throws Exception { if (null == params || params.isEmpty()) { return url; } StringBuilder sb = new StringBuilder(url); if (url.indexOf("?") == -1) { sb.append("?"); } sb.append(map2Url(params)); return sb.toString(); } /** * map构造url * * @return 返回类型: * @throws Exception */ public static String map2Url(Map<String, String> paramToMap) throws Exception { if (null == paramToMap || paramToMap.isEmpty()) { return null; } StringBuffer url = new StringBuffer(); boolean isfist = true; for (Entry<String, String> entry : paramToMap.entrySet()) { if (isfist) { isfist = false; } else { url.append("&"); } url.append(entry.getKey()).append("="); String value = entry.getValue(); if (!StringUtils.isEmpty(value)) { url.append(URLEncoder.encode(value, DEFAULT_CHARSET)); } } return url.toString(); } /** * 检测是否https * * @param url */ private static boolean isHttps(String url) { return url.startsWith("https"); } /** * https 域名校验 * * @param url * @param params * @return */ public class TrustAnyHostnameVerifier implements HostnameVerifier { public boolean verify(String hostname, SSLSession session) { return true;// 直接返回true } } private static class MyX509TrustManager implements X509TrustManager { public X509Certificate[] getAcceptedIssuers() { return null; } public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException { } public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException { } }; public static void main(String[] args) { String str = ""; try { str = get("https://www.baidu.com"); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println(str); } }标签：https
原文地址：http://blog.51cto.com/hackerxian/2103381
