自制HttpClientUtils工具类

先引入需要都依赖包吧。

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5.2</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.8</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.2</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.6.2</version>
        </dependency>

　开始编写代码了，创建一个HttpUtils工具类，自己创建一个doGet 和doPost方法，分别请求get和post请求

import com.google.gson.Gson;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class HttpUtils {

    private static final Gson gson = new Gson();

    /**
     * get方法
     * @param
     * @return
     */
    public static Map<String,Object> doGet(String url){
        CloseableHttpClient httpClient = HttpClients.createDefault();
        Map<String,Object> map = new HashMap<>();
        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(5000)
                .setSocketTimeout(5000).setRedirectsEnabled(true).build();
        HttpGet httpGet = new HttpGet(url);
        httpGet.setConfig(requestConfig);
        try{
            HttpResponse httpResponse = httpClient.execute(httpGet);
            if(httpResponse.getStatusLine().getStatusCode()==200){
                String jsonResult = EntityUtils.toString(httpResponse.getEntity());
                map = gson.fromJson(jsonResult,map.getClass());
            }
        }catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return map;
    }

    public static String doPost(String url,String data,int timeout) {
        CloseableHttpClient httpClient = HttpClients.createDefault();

        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(5000).setConnectionRequestTimeout(5000)
                .setSocketTimeout(5000).setRedirectsEnabled(true).build();

        HttpPost httpPost = new HttpPost();
        httpPost.setConfig(requestConfig);
        httpPost.addHeader("Content-type","text/html;charset=UTF-8");

        if(data!=null && data instanceof  String){
            StringEntity stringEntity = new StringEntity(data,"UTF-8");
            httpPost.setEntity(stringEntity);
        }

        try {
            CloseableHttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity httpEntity = httpResponse.getEntity();
            if(httpResponse.getStatusLine().getStatusCode()==200) {
                String result = EntityUtils.toString(httpEntity);
                return result;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            try{
                httpClient.close();
            }catch(Exception e){
                e.printStackTrace();
            }
        }
        return null;
    }

}