1 package cn.xls;
  2 
  3 import javax.net.ssl.HttpsURLConnection;
  4 import javax.net.ssl.SSLContext;
  5 import javax.net.ssl.SSLSocketFactory;
  6 import javax.net.ssl.TrustManager;
  7 import java.io.BufferedReader;
  8 import java.io.InputStream;
  9 import java.io.InputStreamReader;
 10 import java.io.OutputStream;
 11 import java.net.ConnectException;
 12 import java.net.HttpURLConnection;
 13 import java.net.URL;
 14 import java.security.SecureRandom;
 15 
 16 /**
 17  * @program: 
 18  * @description: 
 19  * @author: l
 20  */
 21 public class HttpUrlConnectionDemo {
 22 
 23     /**
 24      * 发起http请求并获取结果
 25      *
 26      * @param requestUrl    请求地址
 27      * @param requestMethod 请求方式 GET/POST
 28      * @param outputStr     提交的数据   格式:(例子:"name=name&age=age)
 29      * @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
 30      */
 31     public static String httpRequest(String requestUrl, String requestMethod, String outputStr) {
 32         String resultStr = "";
 33         StringBuffer buffer = new StringBuffer();
 34         try {
 35             URL url = new URL(resultStr);
 36             HttpURLConnection httpURLConn = (HttpURLConnection) url.openConnection();
 37 
 38             httpURLConn.setDoInput(true);
 39             httpURLConn.setDoOutput(true);
 40             httpURLConn.setUseCaches(false);
 41 
 42             //设置请求方式
 43             httpURLConn.setRequestMethod(requestMethod);
 44 
 45             //设置超时时间
 46             httpURLConn.setConnectTimeout(30 * 1000);
 47             httpURLConn.setReadTimeout(10 * 1000);
 48 
 49             //GET方式需要显示连接
 50             if ("GET".equalsIgnoreCase(requestMethod)) {
 51                 httpURLConn.connect();
 52             }
 53 
 54             //POST方式隐式自动连接
 55             if (null != outputStr) {
 56                 OutputStream outputStream = httpURLConn.getOutputStream();
 57                 //防止中文乱码
 58                 outputStream.write(outputStr.getBytes("UTF-8"));
 59                 outputStream.close();
 60             }
 61 
 62             //将返回的输入流换成字符串
 63             InputStream inputStream = httpURLConn.getInputStream();
 64             InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "UTF-8");
 65             BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
 66 
 67             String str = null;
 68             while ((str = bufferedReader.readLine()) != null) {
 69                 buffer.append(str);
 70             }
 71             bufferedReader.close();
 72             inputStreamReader.close();
 73             //释放资源
 74             inputStream.close();
 75             inputStream = null;
 76             httpURLConn.disconnect();
 77             resultStr = buffer.toString();
 78         } catch (Exception e) {
 79             e.printStackTrace();
 80         }
 81         return resultStr;
 82     }
 83 
 84     /**
 85      * 发起https请求并获取结果
 86      *
 87      * @param requestUrl    请求地址
 88      * @param requestMethod 请求方式
 89      * @param outputStr     提交的数据
 90      * @return json字符串
 91      */
 92     public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) {
 93         String resultStr = "";
 94         StringBuffer buffer = new StringBuffer();
 95         try {
 96             //创建SSLcontext对象,并使用我们指定的信任管理器初始化
 97             TrustManager[] trustManagers = {new MyX509TrustManager()};
 98             SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSEE");
 99             sslContext.init(null, trustManagers, new SecureRandom());
100             //从上述SSLContext对象中得到SSLSocketFactory对象
101             SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
102 
103             URL url = new URL(resultStr);
104             HttpsURLConnection httpsUrlConn = (HttpsURLConnection) url.openConnection();
105             httpsUrlConn.setSSLSocketFactory(sslSocketFactory);
106 
107             httpsUrlConn.setRequestMethod(requestMethod);
108             httpsUrlConn.setConnectTimeout(30 * 1000);
109             httpsUrlConn.setReadTimeout(10 * 1000);
110 
111             if ("GET".equalsIgnoreCase(requestMethod)) {
112                 httpsUrlConn.connect();
113             }
114 
115             if (null != outputStr) {
116                 OutputStream outputStream = httpsUrlConn.getOutputStream();
117                 outputStream.write(outputStr.getBytes("UTF-8"));
118                 outputStream.close();
119             }
120 
121             InputStream inputStream = httpsUrlConn.getInputStream();
122             InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
123             BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
124 
125             String str = null;
126             while ((str = bufferedReader.readLine()) != null) {
127                 buffer.append(str);
128             }
129             bufferedReader.close();
130             inputStreamReader.close();
131             inputStream.close();
132             inputStream = null;
133             httpsUrlConn.disconnect();
134 
135             resultStr = buffer.toString();
136         } catch (ConnectException e) {
137             System.out.println("server connection timed out");
138             e.printStackTrace();
139         } catch (Exception e) {
140             e.printStackTrace();
141         }
142         return resultStr;
143     }
144 
145     public static void main(String[] args) {
146 //        System.out.println(httpsRequest("https://search.jd.com/Search?keyword=%E6%89%8B%E6%9C%BA&enc=utf-8&psort=3&page=3","GET",""));
147         System.out.println(httpRequest("http://bestcbooks.com/","GET",null));
148         System.out.println(httpsRequest("https://search.jd.com/Search?keyword=%E6%89%8B%E6%9C%BA&enc=utf-8&psort=3&page=3","GET",null));
149     }
150 }

java.net.MalformedURLException: no protocol: 
    at java.net.URL.<init>(URL.java:586)
    at java.net.URL.<init>(URL.java:483)
    at java.net.URL.<init>(URL.java:432)
    at cn.xls.HttpUrlConnectionDemo.httpRequest(HttpUrlConnectionDemo.java:38)
    at cn.xls.HttpUrlConnectionDemo.main(HttpUrlConnectionDemo.java:150)
java.security.NoSuchProviderException: no such provider: SunJSEE
    at sun.security.jca.GetInstance.getService(GetInstance.java:83)
    at sun.security.jca.GetInstance.getInstance(GetInstance.java:206)
    at javax.net.ssl.SSLContext.getInstance(SSLContext.java:199)
    at cn.xls.HttpUrlConnectionDemo.httpsRequest(HttpUrlConnectionDemo.java:101)
    at cn.xls.HttpUrlConnectionDemo.main(HttpUrlConnectionDemo.java:151)