JAVA实现http/https的Post、Get、代理访问请求

前言

平时测试的时候可能会遇到使用Java发送http或者https请求的需求.网上找了一圈暂时没有发现比较称心方便能够直接使用的代码.所以就借鉴别人的代码按自己需求改造了一下.主要实现http/https的get和post请求,并支持设置代理抓包.只需要一个Java文件就搞定,不需要第三方库支持.

CODE(复制即用)

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.InetSocketAddress;import java.net.Proxy;import java.net.Socket;import java.net.URL;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import java.util.HashMap;import java.util.Map;import javax.net.ssl.HostnameVerifier;import javax.net.ssl.HttpsURLConnection;import javax.net.ssl.SSLContext;import javax.net.ssl.SSLEngine;import javax.net.ssl.SSLSession;import javax.net.ssl.TrustManager;import javax.net.ssl.X509ExtendedTrustManager;public class HttpsUtils {    private static boolean proxySet = true;    private static String proxyHost = "127.0.0.1";    private static int proxyPort = 8080;    public static void main(String[] args) {        String url = "https://www.google.com";        String params = "";        String getResult = HttpsUtils.sendPost(url, params, proxySet);        System.out.println(getResult);    }    //设置请求头属性    public static Map<String, String> setProperty() {        HashMap<String, String> pMap = new HashMap<>();        // pMap.put("Accept-Encoding", "gzip"); //请求定义gzip,响应也是压缩包        pMap.put("connection", "Keep-Alive");        pMap.put("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");        pMap.put("Content-Type", "application/x-www-form-urlencoded");        return pMap;    }    /**     * GET请求     *      * @param url     *            请求的URL     * @param param     *            请求参数，name1=value1&name2=value2 的形式     * @return 响应结果     */    public static String sendGet(String url, String param, boolean isproxy) {        String result = "";        BufferedReader in = null;        try {            String urlNameString = url;            if (param != null && !("".equals(param)))                urlNameString = url + "?" + param;            URL realUrl = new URL(urlNameString);            // 打开和URL之间的连接            HttpURLConnection connection = null;            if (isproxy) {// 使用代理模式                @SuppressWarnings("static-access")                Proxy proxy = new Proxy(Proxy.Type.DIRECT.HTTP, new InetSocketAddress(proxyHost, proxyPort));                connection = (HttpURLConnection) realUrl.openConnection(proxy);            } else {                connection = (HttpURLConnection) realUrl.openConnection();            }            // https 忽略证书验证            if (url.substring(0, 5).equals("https")) {                SSLContext ctx = MyX509TrustManagerUtils();                ((HttpsURLConnection) connection).setSSLSocketFactory(ctx.getSocketFactory());                ((HttpsURLConnection) connection).setHostnameVerifier(new HostnameVerifier() {                    @Override                    public boolean verify(String arg0, SSLSession arg1) {                        return true;                    }                });            }            // 设置通用的请求属性            for (Map.Entry<String, String> entry : setProperty().entrySet()) {                connection.setRequestProperty(entry.getKey(), entry.getValue());            }            // 建立连接            connection.connect();            // 定义 BufferedReader输入流来读取URL的响应            if (connection.getResponseCode() == HttpURLConnection.HTTP_OK                    || connection.getResponseCode() == HttpURLConnection.HTTP_CREATED                    || connection.getResponseCode() == HttpURLConnection.HTTP_ACCEPTED) {                in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));            } else {                in = new BufferedReader(new InputStreamReader(connection.getErrorStream(), "UTF-8"));            }            String line;            while ((line = in.readLine()) != null) {                result += line;            }        } catch (Exception e) {            System.out.println("发送GET请求出现异常！");            e.printStackTrace();        }        // 使用finally块来关闭输入流        finally {            try {                if (in != null) {                    in.close();                }            } catch (Exception e2) {                e2.printStackTrace();            }        }        return result;    }    /**     * POST请求     *      * @param url     *            发送请求的 URL     * @param param     *            请求参数 name1=value1&name2=value2 的形式     * @param isproxy     *            是否使用代理模式     * @return 响应结果     */    public static String sendPost(String url, String param, boolean isproxy) {        OutputStreamWriter out = null;        BufferedReader in = null;        String result = "";        try {            URL realUrl = new URL(url);            HttpURLConnection conn = null;            if (isproxy) {// 使用代理模式                @SuppressWarnings("static-access")                Proxy proxy = new Proxy(Proxy.Type.DIRECT.HTTP, new InetSocketAddress(proxyHost, proxyPort));                conn = (HttpURLConnection) realUrl.openConnection(proxy);            } else {                conn = (HttpURLConnection) realUrl.openConnection();            }            // https            if (url.substring(0, 5).equals("https")) {                SSLContext ctx = MyX509TrustManagerUtils();                ((HttpsURLConnection) conn).setSSLSocketFactory(ctx.getSocketFactory());                ((HttpsURLConnection) conn).setHostnameVerifier(new HostnameVerifier() {                    //在握手期间，如果 URL 的主机名和服务器的标识主机名不匹配，则验证机制可以回调此接口的实现程序来确定是否应该允许此连接。                    @Override                    public boolean verify(String arg0, SSLSession arg1) {                        return true;                    }                });            }            // 发送POST请求必须设置如下两行            conn.setDoOutput(true);            conn.setDoInput(true);            conn.setRequestMethod("POST"); // POST方法            // 设置通用的请求属性            for (Map.Entry<String, String> entry : setProperty().entrySet()) {                conn.setRequestProperty(entry.getKey(), entry.getValue());            }            conn.connect();            // 获取URLConnection对象对应的输出流            out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");            // 发送请求参数            out.write(param);            // flush输出流的缓冲            out.flush();            // 定义BufferedReader输入流来读取URL的响应            if (conn.getResponseCode() == HttpURLConnection.HTTP_OK                    || conn.getResponseCode() == HttpURLConnection.HTTP_CREATED                    || conn.getResponseCode() == HttpURLConnection.HTTP_ACCEPTED) {                in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));            } else {                in = new BufferedReader(new InputStreamReader(conn.getErrorStream(), "UTF-8"));            }            String line;            while ((line = in.readLine()) != null) {                result += line;            }        } catch (Exception e) {            System.out.println("发送 POST 请求出现异常！");            e.printStackTrace();        }        // 使用finally块来关闭输出流、输入流        finally {            try {                if (out != null) {                    out.close();                }                if (in != null) {                    in.close();                }            } catch (IOException ex) {                ex.printStackTrace();            }        }        return result;    }    // ===========================utils===================    /**     * url编码     *      * @param source     *            待编码字符串     * @param encode     *            字符编码 eg:UTF-8     * @return 编码字符串     */    public static String urlEncode(String source, String encode) {        String result = source;        try {            result = java.net.URLEncoder.encode(source, encode);        } catch (UnsupportedEncodingException e) {            e.printStackTrace();            return "0";        }        return result;    }    /*     * HTTPS忽略证书验证,防止高版本jdk因证书算法不符合约束条件,使用继承X509ExtendedTrustManager的方式     */    class MyX509TrustManager extends X509ExtendedTrustManager {        @Override        public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {            // TODO Auto-generated method stub        }        @Override        public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {            // TODO Auto-generated method stub        }        @Override        public X509Certificate[] getAcceptedIssuers() {            // TODO Auto-generated method stub            return null;        }        @Override        public void checkClientTrusted(X509Certificate[] arg0, String arg1, Socket arg2) throws CertificateException {            // TODO Auto-generated method stub        }        @Override        public void checkClientTrusted(X509Certificate[] arg0, String arg1, SSLEngine arg2)                throws CertificateException {            // TODO Auto-generated method stub        }        @Override        public void checkServerTrusted(X509Certificate[] arg0, String arg1, Socket arg2) throws CertificateException {            // TODO Auto-generated method stub        }        @Override        public void checkServerTrusted(X509Certificate[] arg0, String arg1, SSLEngine arg2)                throws CertificateException {            // TODO Auto-generated method stub        }    }    public static SSLContext MyX509TrustManagerUtils() {        TrustManager[] tm = { new HttpsUtils().new MyX509TrustManager() };        SSLContext ctx = null;        try {            ctx = SSLContext.getInstance("TLS");            ctx.init(null, tm, null);        } catch (Exception e) {            e.printStackTrace();        }        return ctx;    }}

参考资料:http://www.oschina.net/code/snippet_2266157_45252