HTTP使用get，post方式连接

public static String doGet(String httpUrl) {

        HttpURLConnection conn = null;

        InputStream is = null;

        BufferedReader br = null;

        String result = null;

        try {

            //创建远程url链接

            URL url = new URL(httpUrl);

            //通过远程URL连接对象打开一个连接

            conn = (HttpURLConnection) url.openConnection();

            //设置连接方式为get

            conn.setRequestMethod("GET");

            //设置连接主机服务器的超时时间

            conn.setConnectTimeout(15000);

            //设置读取远程返回的数据时间

            conn.setReadTimeout(60000);

            //发送请求

            conn.connect();

            //通过连接，获取输入流

            if(conn.getResponseCode() == 200) {

                is = conn.getInputStream();

                //封装输入流is，并指定字符集

                br = new BufferedReader(new InputStreamReader(is,"UTF-8"));

                //存放数据

                StringBuffer sbf = new StringBuffer();

                String temp = null;

                while((temp = br.readLine()) != null) {

                    sbf.append(temp);

                }

                result = sbf.toString();

            }

        } catch (Exception e) {

            e.printStackTrace();

        }finally {

            close(conn,is,null,br);

        }

        return result;

    }

    public static String doPost(String httpUrl,String param) {

        HttpURLConnection conn = null;

        InputStream is = null;

        OutputStream os = null;

        BufferedReader br = null;

        String result = null;

        try {

            //创建远程url链接

            URL url = new URL(httpUrl);

            //通过远程URL连接对象打开一个连接

            conn = (HttpURLConnection) url.openConnection();

            //设置连接方式为get

            conn.setRequestMethod("POST");

            //设置连接主机服务器的超时时间

            conn.setConnectTimeout(15000);

            //设置读取远程返回的数据时间

            conn.setReadTimeout(60000);

            //默认设置为false，当向远程服务器传输/写数据

            conn.setDoInput(true);

            //默认设置为true，当前向远程服务器时，设置为true，该参数可有可无

            conn.setDoOutput(true);

            //设置传入参数的格式：请求参数应该是name1 = value1，name2 = value2的形式

            conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

            //通过连接对象获取一个输出流

            os = conn.getOutputStream();

            //通过输出流对象将数据写出去

            os.write(param.getBytes("UTF-8"));

            //通过连接，获取输入流

            if(conn.getResponseCode() == 200) {

                is = conn.getInputStream();

                //封装输入流is，并指定字符集

                br = new BufferedReader(new InputStreamReader(is,"UTF-8"));

                //存放数据

                StringBuffer sbf = new StringBuffer();

                String temp = null;

                while((temp = br.readLine()) != null) {

                    sbf.append(temp);

                }

                result = sbf.toString();

            }

        } catch (Exception e) {

            e.printStackTrace();

        }finally {

            close(conn,is,null,br);

        }

        return result;

    }