public static String get(String url) throws IOException {

        BufferedReader in = null;

        URL realUrl = new URL(url);

        // 打开和URL之间的连接

        URLConnection connection = realUrl.openConnection();

        // 设置通用的请求属性

        connection.setRequestProperty("accept", "*/*");

        connection.setRequestProperty("connection", "Keep-Alive");

        connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

        connection.setConnectTimeout(5000);

        connection.setReadTimeout(5000);

        // 建立实际的连接

        connection.connect();

        // 定义 BufferedReader输入流来读取URL的响应

        in = new BufferedReader(new InputStreamReader(connection.getInputStream()));

        StringBuffer sb = new StringBuffer();

        String line;

        while ((line = in.readLine()) != null) {

            sb.append(line);

        }

        in.close();

        return sb.toString();

    }

public static String httpGet(String url, String charset)

            throws HttpException, IOException {

        String json = null;

        HttpGet httpGet = new HttpGet();

        // 设置参数

        try {

            httpGet.setURI(new URI(url));

        } catch (URISyntaxException e) {

            throw new HttpException("请求url格式错误。"+e.getMessage());

        }

        // 发送请求

        HttpClient client=HttpClients.createDefault();

        HttpResponse httpResponse = client.execute(httpGet);

        // 获取返回的数据

        HttpEntity entity = httpResponse.getEntity();

        byte[] body = EntityUtils.toByteArray(entity);

        StatusLine sL = httpResponse.getStatusLine();

        int statusCode = sL.getStatusCode();

        if (statusCode == 200) {

            json = new String(body, charset);

            entity.consumeContent();

        } else {

            throw new HttpException("statusCode="+statusCode);

        }

        return json;

    }

public static String post(String url, String param, Map<String, String> header) throws IOException {

        PrintWriter out = null;

        BufferedReader in = null;

        String result = "";

        URL realUrl = new URL(url);

        // 打开和URL之间的连接

        URLConnection conn = realUrl.openConnection();

        //设置超时时间

        conn.setConnectTimeout(5000);

        conn.setReadTimeout(15000);

        // 设置通用的请求属性

        if (header != null) {

            for (Map.Entry<String, String> entry : header.entrySet()) {

                conn.setRequestProperty(entry.getKey(), entry.getValue());

            }

        }

        conn.setRequestProperty("accept", "*/*");

        conn.setRequestProperty("connection", "Keep-Alive");

        conn.setRequestProperty("user-agent",

                "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

        // 发送POST请求必须设置如下两行

        conn.setDoOutput(true);

        conn.setDoInput(true);

        // 获取URLConnection对象对应的输出流

        out = new PrintWriter(conn.getOutputStream());

        // 发送请求参数

        out.print(param);

        // flush输出流的缓冲

        out.flush();

        // 定义BufferedReader输入流来读取URL的响应

        in = new BufferedReader(

                new InputStreamReader(conn.getInputStream(), "utf8"));

        String line;

        while ((line = in.readLine()) != null) {

            result += line;

        }

        if (out != null) {

            out.close();

        }

        if (in != null) {

            in.close();

        }

        return result;

    }

package com.tpot.DataDownload;

import java.util.Properties;

public class Configer {

    public static void configProxy(){

        Properties prop=System.getProperties();

        prop.setProperty("proxySet","true");

        prop.setProperty("http.proxyHost","proxy.xxxx.com");

        prop.setProperty("http.proxyPort","8080");

        prop.setProperty("http.proxyUser","xxxxx");

        prop.setProperty("http.proxyPassword","xxxxx");

        prop.setProperty("https.proxyHost","proxy.xxxxx.com");

        prop.setProperty("https.proxyPort","8080");

        prop.setProperty("https.proxyUser","xxxxx");

        prop.setProperty("https.proxyPassword","xxxxx");

    }

}