httpUtils

package com.topsec.ws.util;

import com.topsec.ws.constant.Constant;
import org.apache.http.*;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.mime.HttpMultipartMode;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.StringBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import java.io.*;

/**
 * @author 馬弦
 * @date 2017年10月23日 下午2:49
 * HttpClient工具類
 */
public class HttpUtil {

    private static Logger logger = Logger.getLogger(HttpUtil.class);

    /**
     * get請求
     * @return
     */
    public static String doGet(String url) {
        try {
            HttpClient client = new DefaultHttpClient();
            //發送get請求
            HttpGet request = new HttpGet(url);
            HttpResponse response = client.execute(request);

            /**請求發送成功，並得到響應**/
            if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                /**讀取服務器返回過來的json字符串數據**/
                String strResult = EntityUtils.toString(response.getEntity());

                return strResult;
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * post請求(用於key-value格式的參數)
     * @param url
     * @param params
     * @return
     */
    public static String doPost(String url, Map params){

        BufferedReader in = null;
        try {
            // 定義HttpClient
            HttpClient client = new DefaultHttpClient();
            // 實例化HTTP方法
            HttpPost request = new HttpPost();
            request.setURI(new URI(url));

            //設置參數
            List<NameValuePair> nvps = new ArrayList<NameValuePair>();
            for (Iterator iter = params.keySet().iterator(); iter.hasNext();) {
                String name = (String) iter.next();
                String value = String.valueOf(params.get(name));
                nvps.add(new BasicNameValuePair(name, value));

                //System.out.println(name +"-"+value);
            }
            request.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));

            HttpResponse response = client.execute(request);
            int code = response.getStatusLine().getStatusCode();
            if(code == 200){   //請求成功
                in = new BufferedReader(new InputStreamReader(response.getEntity()
                        .getContent(),"utf-8"));
                StringBuffer sb = new StringBuffer("");
                String line = "";
                String NL = System.getProperty("line.separator");
                while ((line = in.readLine()) != null) {
                    sb.append(line + NL);
                }

                in.close();

                return sb.toString();
            }
            else{  //
                System.out.println("狀態碼：" + code);
                return null;
            }
        }
        catch(Exception e){
            e.printStackTrace();

            return null;
        }
    }

    /**
     * post請求（用於請求json格式的參數）
     * @param url
     * @param params
     * @return
     */
    public static String doPost(String url, String params) throws Exception {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);// 創建httpPost
        httpPost.setHeader("Accept", "application/json");
        httpPost.setHeader("Content-Type", "application/json");
        String charSet = "UTF-8";
        StringEntity entity = new StringEntity(params, charSet);
        httpPost.setEntity(entity);
        CloseableHttpResponse response = null;

        try {

            response = httpclient.execute(httpPost);
            StatusLine status = response.getStatusLine();
            int state = status.getStatusCode();
            if (state == HttpStatus.SC_OK) {
                HttpEntity responseEntity = response.getEntity();
                String jsonString = EntityUtils.toString(responseEntity);
                return jsonString;
            }
            else{
                logger.error("請求返回:"+state+"("+url+")");
            }
        }
        finally {
            if (response != null) {
                try {
                    response.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            try {
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    /**
     * 上傳文件
     * @param url
     * @param filePth
     * @param paramsMap
     */
    public static void uploadFile(String url,String filePth,Map paramsMap){
        HttpClient HTTP_CLIENT = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost(url);
        try {
            final MultipartEntityBuilder multipartEntity = MultipartEntityBuilder.create();
            multipartEntity.setCharset(Charset.forName("utf-8"));
            multipartEntity.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);

            if(null != paramsMap){
                for (Iterator iter = paramsMap.keySet().iterator(); iter.hasNext();) {
                    String name = (String) iter.next();
                    String value = String.valueOf(paramsMap.get(name));
                    multipartEntity.addPart(name,new StringBody(value, ContentType.MULTIPART_FORM_DATA));
                    //System.out.println(name +"-"+value);
                }
            }

            File file = new File(filePth);
            multipartEntity.addBinaryBody("file", file);//文件字段
            //builder.addBinaryBody("upfile", file, ContentType.DEFAULT_BINARY, textFileName);
            //builder.addTextBody("text", message, ContentType.DEFAULT_BINARY);

            httpPost.setEntity(multipartEntity.build());
            //httpPost.setHeader("token", token);//設置請求頭
            String result = EntityUtils.toString(HTTP_CLIENT.execute(httpPost).getEntity());

        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    public static void postFile(String url,Map paramsMap,String dir,String fileName){
        CloseableHttpClient closeHttpClient = HttpClients.createDefault();
        CloseableHttpResponse httpResponse = null;
        //發送Post請求
        //http://127.0.0.1:9090/myws/test/getzichan2.do
        HttpPost httpPost = new HttpPost(url);
        //設置Post參數
        List<NameValuePair> params = new ArrayList<>();

        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        if(null != paramsMap){
            for (Iterator iter = paramsMap.keySet().iterator(); iter.hasNext();) {
                String name = (String) iter.next();
                String value = String.valueOf(paramsMap.get(name));
                params.add(new BasicNameValuePair(name, value));
            }
        }

        try {
            //轉換參數並設置編碼格式
            httpPost.setEntity(new UrlEncodedFormEntity(params, Consts.UTF_8));
            //執行Post請求 得到Response對象
            httpResponse = closeHttpClient.execute(httpPost);
            //httpResponse.getStatusLine() 響應頭信息
            System.out.println(httpResponse.getStatusLine());

            InputStream inputStream = httpResponse.getEntity().getContent();
            ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
            byte[] buff = new byte[1024*1024]; //如果是稍微大的文件，這裏配置的大一些
            int len = 0;
            while((len = inputStream.read(buff)) > 0) {
                //把從服務端讀取的文件流保存到ByteArrayOutputSteam中
                byteArray.write(buff, 0, len);
                byteArray.flush();
            }
            String aaa = new String(byteArray.toByteArray());
            FileUtil.byteToFile(byteArray.toByteArray(),dir,fileName);
            inputStream.close();
            httpResponse.close();

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            if(httpResponse != null){
                try {
                    httpResponse.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(closeHttpClient != null){
                try {
                    closeHttpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    }

    public static void main(String[] argus){
        postFile("http://localhost:8080/portal-es/portal/unitIP.do?cmd=SAXcreate",null,
                Constant.wsUpload.get(Constant.WsUnitKey.downLoadPath),UuidUtil.getUUID()+".xml");
    }

}