HttpURLConnection请求接口

 import java.io.BufferedInputStream;

import java.io.BufferedReader;

import java.io.DataOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

import java.nio.charset.StandardCharsets;

import org.apache.commons.io.IOUtils;

import org.apache.commons.io.output.ByteArrayOutputStream;

import org.apache.commons.lang3.StringUtils;

import cn.zsmy.constant.BaseConstant;

/**

     * @param path

     * @param key

     * @param value

     * @return

     */

    public static String getHttp(String path, String key, String value){

        HttpURLConnection httpURLConnection = null;

        InputStream bis = null;

        ByteArrayOutputStream bos = null;

        try {

            URL url = new URL(path);

            //打开连接

            httpURLConnection = (HttpURLConnection) url.openConnection();

            httpURLConnection.setRequestProperty("content-Type", "application/json");

            httpURLConnection.setRequestProperty("charset", "utf-8");

            if(key != null && value != null){

                httpURLConnection.setRequestProperty(key, value);

            }

            BaseConstant.MY_LOG.info("===getHttp==httpURLConnection.getResponseCode()===" + httpURLConnection.getResponseCode());

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

                //得到输入流

                bis = httpURLConnection.getInputStream();

                bos = new ByteArrayOutputStream();

                byte[] buffer = new byte[1024];

                int len = 0;

                while(-1 != (len = bis.read(buffer))){

                    bos.write(buffer,0,len);

                    bos.flush();

                }

                return bos.toString("utf-8");

            }

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            if(httpURLConnection != null){

                httpURLConnection.disconnect();

            }

            if(bis != null){

                try {

                    bis.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

            if(bos != null){

                try {

                    bos.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

        return null;

    }

    /**

     * POST请求获取数据

     */

    public static String postHttp(String path, String params){

        URL url = null;

        HttpURLConnection httpURLConnection = null;

        BufferedInputStream bis = null;

        ByteArrayOutputStream bos = null;

        try {

            url = new URL(path);

            httpURLConnection = (HttpURLConnection) url.openConnection();

            httpURLConnection.setRequestMethod("POST");// 提交模式

            httpURLConnection.setRequestProperty("content-Type", "application/json");

            //httpURLConnection.setRequestProperty("charset", "utf-8");

            // conn.setConnectTimeout(10000);//连接超时 单位毫秒

            // conn.setReadTimeout(2000);//读取超时 单位毫秒

            // 发送POST请求必须设置如下两行

            httpURLConnection.setDoOutput(true);

            httpURLConnection.setDoInput(true);

            // 获取URLConnection对象对应的输出流

            PrintWriter printWriter = new PrintWriter(httpURLConnection.getOutputStream());

            // 发送请求参数

            if(!StringUtils.isEmpty(params)){

                printWriter.write(params);//post的参数 xx=xx&yy=yy

            }

            // flush输出流的缓冲

            printWriter.flush();

            BaseConstant.MY_LOG.info("===postHttp==httpURLConnection.getResponseCode()===" + httpURLConnection.getResponseCode());

            //开始获取数据

            bis = new BufferedInputStream(httpURLConnection.getInputStream());

            bos = new ByteArrayOutputStream();

            int len;

            byte[] arr = new byte[1024];

            while((len=bis.read(arr))!= -1){

                bos.write(arr,0,len);

                bos.flush();

            }

            bos.close();

            return bos.toString(BaseConstant.CHARSET_UTF8);

        } catch (Exception e) {

            e.printStackTrace();

        } finally {

            if(httpURLConnection != null){

                httpURLConnection.disconnect();

            }

            if(bis != null){

                try {

                    bis.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

            if(bos != null){

                try {

                    bos.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

        return null;

    }