HttpClientUtil,基于httpclient-4.5.3

httpclient可以做什么

HTTP 和相关协议的低级 Java 组件工具集

maven引入

    <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.3</version>
        </dependency>

代码

import net.sf.json.JSONObject;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class HttpClientUtil {

    private static Logger log = LoggerFactory.getLogger(HttpClientUtil.class);

    private HttpClientUtil() {
    }

    private static RequestConfig requestConfig = RequestConfig.custom()
            .setConnectTimeout(5000).setConnectionRequestTimeout(1000)
            .setSocketTimeout(60000).build();

    public static String doGet(String url, Map<String, String> param) {

        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();

        String resultString = null;
        CloseableHttpResponse response = null;
        try {
            // 创建uri
            URIBuilder builder = new URIBuilder(url);
            if (param != null) {
                for (String key : param.keySet()) {
                    builder.addParameter(key, param.get(key));
                }
            }
            URI uri = builder.build();

            // 创建http GET请求
            HttpGet httpGet = new HttpGet(uri);
            httpGet.setConfig(requestConfig);
            // 执行请求
            response = httpclient.execute(httpGet);
            // 判断返回状态是否为200
            if (response.getStatusLine().getStatusCode() == 200) {
                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
            }
        } catch (Exception e) {
            log.error(e.getMessage(), e);
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpclient.close();
            } catch (IOException e) {
                log.error(e.getMessage(), e);
            }
        }
        return resultString;
    }

    public static String doGet(String url) {
        return doGet(url, null);
    }

    public static String doPost(String url, Map<String, Object> param) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String resultString = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            httpPost.setConfig(requestConfig);
            // 创建参数列表
            if (param != null) {
                List<NameValuePair> paramList = new ArrayList<>();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, (String) param.get(key)));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
                httpPost.setEntity(entity);
            }
            // 执行http请求
            response = httpClient.execute(httpPost);
            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
        } catch (Exception e) {
            log.error(e.getMessage(), e);
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
                httpClient.close();
            } catch (IOException e) {
                log.error(e.getMessage(), e);
            }
        }

        return resultString;
    }

    public static void main(String[] args) throws Exception {
        HashMap hashMap = new HashMap();
        hashMap.put("username", "taoqing7008@aliyun.com");
        hashMap.put("password", "sysadmin");
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("username", "taoqing7008@aliyun.com");
        jsonObject.put("password", "sysadmin");
        System.out.println(doPostJson("http://iot.ahysdz.com:9995/api/auth/login", jsonObject.toString(), null));
    }

    public static String doPost(String url) {
        return doPost(url, null);
    }

    public static JSONObject doPostJson(String url, String json, String token_header) throws Exception {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        JSONObject jsonObject = new JSONObject();
        String responseBody = "";
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            httpPost.setConfig(requestConfig);
            // 创建请求内容
            httpPost.setHeader("Connection", "Keep-Alive");
            httpPost.setHeader("Content-Type", "application/json;charset=utf-8");
            if (StringUtils.isNotEmpty(token_header)) {
                httpPost.setHeader("X-Authorization", "Bearer " + token_header);
            }
            StringEntity entity = new StringEntity(json);
            entity.setContentType("application/json;charset=utf-8");
            httpPost.setEntity(entity);
            // 执行http请求
            response = httpClient.execute(httpPost);
            log.info("Executing request {},--> status:{}", url, response.getStatusLine().getStatusCode());
            jsonObject.put("status", response.getStatusLine().getStatusCode());
            jsonObject.put("content", EntityUtils.toString(response.getEntity(), "UTF-8"));
            return jsonObject;
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            throw e;
        } finally {
            try {
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                log.error(e.getMessage(), e);
            }
        }
    }

    public static JSONObject doDelete(final String url, String token_header) throws Exception {
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpDelete httpDelete = new HttpDelete(url);
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(35000).setConnectionRequestTimeout(35000).setSocketTimeout(60000).build();
        httpDelete.setConfig(requestConfig);
        JSONObject jsonObject = new JSONObject();
        httpDelete.setHeader("Connection", "Keep-Alive");
        httpDelete.setHeader("Content-Type", "application/json;charset=utf-8");
        if (StringUtils.isNotEmpty(token_header)) {
            httpDelete.setHeader("X-Authorization", "Bearer " + token_header);
        }
        CloseableHttpResponse httpResponse = null;
        String resultString = null;
        try {
            log.info("Executing request : " + url);
            httpResponse = httpClient.execute(httpDelete);
            log.info("Executing request {},--> status:{}", url, httpResponse.getStatusLine().getStatusCode());
            jsonObject.put("status", httpResponse.getStatusLine().getStatusCode());
            jsonObject.put("content", EntityUtils.toString(httpResponse.getEntity(), "UTF-8"));
            return jsonObject;
        } catch (ClientProtocolException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            if (httpResponse != null) {
                try {
                    httpResponse.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if (null != httpClient) {
                try {
                    httpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }
}

参考的网站

添加链接描述

结束语

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