HttpClient发送get请求和post请求及文件上传下载

package com.alibaba.dingtalk.openapi.demo.utils;

import java.io.File;
import java.io.IOException;
import java.net.URI;

import org.apache.commons.io.FileUtils;
import org.apache.http.HttpEntity;
import org.apache.http.client.config.RequestConfig;
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.client.protocol.HttpClientContext;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.ContentType;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.client.RedirectLocations;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;

import com.alibaba.dingtalk.openapi.demo.OApiException;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;


public class HttpHelper {

	public static JSONObject httpGet(String url) throws OApiException{
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = null;
        CloseableHttpClient httpClient = HttpClients.createDefault();
        RequestConfig requestConfig = RequestConfig.custom().
        		setSocketTimeout(2000).setConnectTimeout(2000).build();
        httpGet.setConfig(requestConfig);

        try {
            response = httpClient.execute(httpGet, new BasicHttpContext());

            if (response.getStatusLine().getStatusCode() != 200) {

                System.out.println("request url failed, http code=" + response.getStatusLine().getStatusCode()
                                   + ", url=" + url);
                return null;
            }
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                String resultStr = EntityUtils.toString(entity, "utf-8");

                JSONObject result = JSON.parseObject(resultStr);
                if (result.getInteger("errcode") == 0) {
//                	result.remove("errcode");
//                	result.remove("errmsg");
                    return result;
                } else {
                    System.out.println("request url=" + url + ",return value=");
                    System.out.println(resultStr);
                    int errCode = result.getInteger("errcode");
                    String errMsg = result.getString("errmsg");
                    throw new OApiException(errCode, errMsg);
                }
            }
        } catch (IOException e) {
            System.out.println("request url=" + url + ", exception, msg=" + e.getMessage());
            e.printStackTrace();
        } finally {
            if (response != null) try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }
	
	
	public static JSONObject httpPost(String url, Object data) throws OApiException {
        HttpPost httpPost = new HttpPost(url);
        CloseableHttpResponse response = null;
        CloseableHttpClient httpClient = HttpClients.createDefault();
        RequestConfig requestConfig = RequestConfig.custom().
        		setSocketTimeout(2000).setConnectTimeout(2000).build();
        httpPost.setConfig(requestConfig);
        httpPost.addHeader("Content-Type", "application/json");

        try {
        	StringEntity requestEntity = new StringEntity(JSON.toJSONString(data), "utf-8");
            httpPost.setEntity(requestEntity);
            
            response = httpClient.execute(httpPost, new BasicHttpContext());

            if (response.getStatusLine().getStatusCode() != 200) {

                System.out.println("request url failed, http code=" + response.getStatusLine().getStatusCode()
                                   + ", url=" + url);
                return null;
            }
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                String resultStr = EntityUtils.toString(entity, "utf-8");

                JSONObject result = JSON.parseObject(resultStr);
                if (result.getInteger("errcode") == 0) {
                	result.remove("errcode");
                	result.remove("errmsg");
                    return result;
                } else {
                    System.out.println("request url=" + url + ",return value=");
                    System.out.println(resultStr);
                    int errCode = result.getInteger("errcode");
                    String errMsg = result.getString("errmsg");
                    throw new OApiException(errCode, errMsg);
                }
            }
        } catch (IOException e) {
            System.out.println("request url=" + url + ", exception, msg=" + e.getMessage());
            e.printStackTrace();
        } finally {
            if (response != null) try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }
	
	
	public static JSONObject uploadMedia(String url, File file) throws OApiException {
        HttpPost httpPost = new HttpPost(url);
        CloseableHttpResponse response = null;
        CloseableHttpClient httpClient = HttpClients.createDefault();
        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(2000).build();
        httpPost.setConfig(requestConfig);

        HttpEntity requestEntity = MultipartEntityBuilder.create().addPart("media",
        		new FileBody(file, ContentType.APPLICATION_OCTET_STREAM, file.getName())).build();
        httpPost.setEntity(requestEntity);

        try {
            response = httpClient.execute(httpPost, new BasicHttpContext());

            if (response.getStatusLine().getStatusCode() != 200) {

                System.out.println("request url failed, http code=" + response.getStatusLine().getStatusCode()
                                   + ", url=" + url);
                return null;
            }
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                String resultStr = EntityUtils.toString(entity, "utf-8");

                JSONObject result = JSON.parseObject(resultStr);
                if (result.getInteger("errcode") == 0) {
                    // 成功
                	result.remove("errcode");
                	result.remove("errmsg");
                    return result;
                } else {
                    System.out.println("request url=" + url + ",return value=");
                    System.out.println(resultStr);
                    int errCode = result.getInteger("errcode");
                    String errMsg = result.getString("errmsg");
                    throw new OApiException(errCode, errMsg);
                }
            }
        } catch (IOException e) {
            System.out.println("request url=" + url + ", exception, msg=" + e.getMessage());
            e.printStackTrace();
        } finally {
            if (response != null) try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }
	
	
	public static JSONObject downloadMedia(String url, String fileDir) throws OApiException {
        HttpGet httpGet = new HttpGet(url);
        CloseableHttpResponse response = null;
        CloseableHttpClient httpClient = HttpClients.createDefault();
        RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(2000).build();
        httpGet.setConfig(requestConfig);

        try {
            HttpContext localContext = new BasicHttpContext();

            response = httpClient.execute(httpGet, localContext);

            RedirectLocations locations = (RedirectLocations) localContext.getAttribute(HttpClientContext.REDIRECT_LOCATIONS);
            if (locations != null) {
                URI downloadUrl = locations.getAll().get(0);
                String filename = downloadUrl.toURL().getFile();
                System.out.println("downloadUrl=" + downloadUrl);
                File downloadFile = new File(fileDir + File.separator + filename);
                FileUtils.writeByteArrayToFile(downloadFile, EntityUtils.toByteArray(response.getEntity()));
                JSONObject obj = new JSONObject();
                obj.put("downloadFilePath", downloadFile.getAbsolutePath());
                obj.put("httpcode", response.getStatusLine().getStatusCode());
                
               
                
                return obj;
            } else {
                if (response.getStatusLine().getStatusCode() != 200) {

                    System.out.println("request url failed, http code=" + response.getStatusLine().getStatusCode()
                                       + ", url=" + url);
                    return null;
                }
                HttpEntity entity = response.getEntity();
                if (entity != null) {
                    String resultStr = EntityUtils.toString(entity, "utf-8");

                    JSONObject result = JSON.parseObject(resultStr);
                    if (result.getInteger("errcode") == 0) {
                        // 成功
                    	result.remove("errcode");
                    	result.remove("errmsg");
                        return result;
                    } else {
                        System.out.println("request url=" + url + ",return value=");
                        System.out.println(resultStr);
                        int errCode = result.getInteger("errcode");
                        String errMsg = result.getString("errmsg");
                        throw new OApiException(errCode, errMsg);
                    }
                }
            }
        } catch (IOException e) {
            System.out.println("request url=" + url + ", exception, msg=" + e.getMessage());
            e.printStackTrace();
        } finally {
            if (response != null) try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }
}

调用方式

public static String getSuiteToken(String suite_key, String suite_secret,String suite_ticket){
		String url = Env.OAPI_HOST + "/service/get_suite_token";
		JSONObject json = new JSONObject();
		json.put("suite_key", suite_key);
		json.put("suite_secret", suite_secret);
		json.put("suite_ticket", suite_ticket);
		JSONObject reponseJson = null;
		String suiteAccessToken = null;
		try {
			reponseJson = HttpHelper.httpPost(url,json);
			suiteAccessToken = reponseJson.getString("suite_access_token");
		} catch (OApiException e) {
			e.printStackTrace();
		}
		return suiteAccessToken;
	}

public static JSONObject getAgentUserInfo(String ssoToken, String code) throws OApiException  {
		
		String url = Env.OAPI_HOST + "/sso/getuserinfo?" + "access_token=" + ssoToken + "&code=" + code;
		JSONObject response = HttpHelper.httpGet(url);
		return response;
	}