data-upload/src/main/java/com/hxjt/dataupload/utils/HttpUtils.java

package com.hxjt.dataupload.utils;

import com.alibaba.fastjson.JSONObject;
import org.apache.http.ParseException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.apache.tomcat.util.http.fileupload.ByteArrayOutputStream;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * 工具类，用于发送get，post请求
 */

public class HttpUtils {


    public static String doGet(String httpurl) {
        HttpURLConnection connection = null;
        InputStream is = null;
        BufferedReader br = null;
        String result = null;// 返回结果字符串
        try {
            // 创建远程url连接对象
            URL url = new URL(httpurl);
            // 通过远程url连接对象打开一个连接，强转成httpURLConnection类
            connection = (HttpURLConnection) url.openConnection();
            // 设置连接方式：get
            connection.setRequestMethod("GET");
            // 设置连接主机服务器的超时时间：15000毫秒
            connection.setConnectTimeout(15000);
            // 设置读取远程返回的数据时间：60000毫秒
            connection.setReadTimeout(60000);
            // 发送请求
            connection.connect();
            // 通过connection连接，获取输入流
            if (connection.getResponseCode() == 200) {
                is = connection.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);
                    sbf.append("\r\n");
                }
                result = sbf.toString();
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 关闭资源
            if (null != br) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            if (null != is) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

            connection.disconnect();// 关闭远程连接
        }

        return result;
    }

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

        String result = "";
        DataOutputStream dataOutputStreamSend = null;
        InputStream inputStream = null;
        ByteArrayOutputStream dataOutputStream = null;
        try {
            URL httpUrl = new URL(url);
            HttpURLConnection urlConnection = (HttpURLConnection)httpUrl.openConnection();
            // 设置超时时间
            urlConnection.setConnectTimeout(10000);
            urlConnection.setReadTimeout(30000);

            urlConnection.setRequestMethod("POST");
            // 设置通用请求类型
            urlConnection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
            urlConnection.setRequestProperty("Charset", "UTF-8");
            // 设置链接状态
            urlConnection.setRequestProperty("connection", "keep-alive");

            // post请求，参数要放在http正文内，因此需要设为true, 默认情况下是false;
            urlConnection.setDoOutput(true);
            // 设置是否从httpUrlConnection读入，默认情况下是true;
            urlConnection.setDoInput(true);
            // Post 请求不能使用缓存
            urlConnection.setUseCaches(false);
            // 设置本次连接是否自动处理重定向
            urlConnection.setInstanceFollowRedirects(true);

            urlConnection.connect();
            // ++++++++++++++++++++++++++++++++++
            // TODO 写入参数
            dataOutputStreamSend = new DataOutputStream(urlConnection.getOutputStream());
            dataOutputStreamSend.write(param.getBytes());
            dataOutputStreamSend.flush();
            // +++++++++++++++++++++++++++++++
            if (urlConnection.getResponseCode() == 200) {
                // 获取返回流
                result = getResult(urlConnection.getInputStream());
            }
        } catch (IOException e) {
            // url格式错误
            e.printStackTrace();
        }
        return result;
    }

    private static String getResult(InputStream inputStream) {
        String result = "";
        ByteArrayOutputStream dataOutputStream = null;
        try {
            byte[] buf = new byte[1024];
            int n;
            dataOutputStream = new ByteArrayOutputStream();

            while (((n = inputStream.read(buf)) != -1)) {
                dataOutputStream.write(buf, 0, n);
            }
            dataOutputStream.toByteArray();
            result = new String(dataOutputStream.toByteArray(), "UTF-8");
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }


    /**
     * post 发送数据
     */
    public static String sendPost(String message,String url) {

        String response = "";
        CloseableHttpClient httpClient = HttpClients.createDefault();
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        try {

            // API地址
            httpClient = HttpClients.createDefault();
            HttpPost httpPost = new HttpPost(url);

            // 构建消息实体
            StringEntity requestEntity = new StringEntity(message, "utf-8");
            requestEntity.setContentEncoding("UTF-8");
            // 构造消息头
            // 发送Json格式的数据请求
            httpPost.setHeader("Content-type", "application/json");
            httpPost.setEntity(requestEntity);
            //发送post请求获取响应值
            String returnValue = httpClient.execute(httpPost, responseHandler);
            if (returnValue != null) {
                response = returnValue;
            }
        } catch (Exception e) {

            System.err.println(e);
        } finally {
            try {
                httpClient.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                System.err.println(e);
            }
        }
        return response;
    }


  /**
   * 发送post请求
     * @param url  路径
     * @param jsonObject  参数(json类型)
     * @param encoding 编码格式
     * @return
             * @throws ParseException
     * @throws IOException
     */
    public static String send(String url, JSONObject jsonObject, String encoding, String userKey, String userToken) throws ParseException, IOException{
        String body = "";
        //创建httpclient对象
        CloseableHttpClient client = HttpClients.createDefault();
        //创建post方式请求对象
        HttpPost httpPost = new HttpPost(url);
        //装填参数
        StringEntity s = new StringEntity(jsonObject.toString(), "utf-8");
        s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
                "application/json"));
        //设置参数到请求对象中
        httpPost.setEntity(s);

//        System.out.println("请求参数："+nvps.toString());

        //设置header信息
        //指定报文头【Content-type】、【User-Agent】
        httpPost.setHeader("Content-type", "application/json");
        httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
        httpPost.setHeader("user-token",userToken);
        httpPost.setHeader("user-key",userKey);
        System.out.println("请求地址："+url);
        System.out.println("请求Key："+userKey);
        System.out.println("请求token："+userToken);
        //执行请求操作，并拿到结果（同步阻塞）
        CloseableHttpResponse response = client.execute(httpPost);
        //获取结果实体
        org.apache.http.HttpEntity entity  = response.getEntity();
        if (entity != null) {
            //按指定编码转换结果实体为String类型
            body = EntityUtils.toString(entity, encoding);
        }
        EntityUtils.consume(entity);
        //释放链接
        response.close();
        return body;
    }

    /**
     * 发送post请求
     * @param url  路径
     * @param jsonObject  参数(json类型)
     * @param encoding 编码格式
     * @return
     * @throws ParseException
     * @throws IOException
     */
    public static String sendDataUpload(String url, JSONObject jsonObject, String encoding, String keyAuthentication) throws ParseException, IOException{
        String body = "";
        //创建httpclient对象
        CloseableHttpClient client = HttpClients.createDefault();
        //创建post方式请求对象
        HttpPost httpPost = new HttpPost(url);
        //装填参数
        StringEntity s = new StringEntity(jsonObject.toString(), "utf-8");
        s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
                "application/json"));
        //设置参数到请求对象中
        httpPost.setEntity(s);

//        System.out.println("请求参数："+nvps.toString());

        //设置header信息
        //指定报文头【Content-type】、【User-Agent】
        httpPost.setHeader("Content-type", "application/json");
        httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
        httpPost.setHeader("entId","ningyanghuagongchany");
        httpPost.setHeader("keyAuthentication",keyAuthentication);
        System.out.println("请求地址："+url);
        //执行请求操作，并拿到结果（同步阻塞）
        CloseableHttpResponse response = client.execute(httpPost);
        //获取结果实体
        org.apache.http.HttpEntity entity  = response.getEntity();
        if (entity != null) {
            //按指定编码转换结果实体为String类型
            body = EntityUtils.toString(entity, encoding);
        }
        EntityUtils.consume(entity);
        //释放链接
        response.close();
        return body;
    }





}