java 发送POST,DELETE,PATCH,GET请求

import java.io.IOException;

import org.apache.commons.codec.CharEncoding;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpOptions;
import org.apache.http.client.methods.HttpPatch;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * HTTP请求辅助工具
 *
 * @project iweixin-pay
 * @fileName WeixinUtil.java
 * @Description
 * @author light-zhang
 * @date 2018年5月29日下午3:29:42
 * @version 1.0.0
 */
public class HttpUtils {
    private static final Logger logger = LoggerFactory.getLogger(HttpUtils.class);
    private static final HttpClient httpClient = HttpClientBuilder.create().build();

    /**
     * 发送POST请求
     *
     * @param url
     * @param _class
     * @return
     */
    public static <T> T post(String url, Class<T> typeOfT) {
        try {
            HttpResponse response = httpClient.execute(new HttpPost(url));
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                logger.debug("post httpRequest url info:{},response info:{}", url, response);
                return JsonPoolUtils.fromJson(EntityUtils.toString(entity, CharEncoding.UTF_8), typeOfT);
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 发送DELETE请求
     *
     * @param url
     * @param typeOfT
     * @return
     */
    public static <T> T delete(String url, Class<T> typeOfT) {
        try {
            HttpResponse response = httpClient.execute(new HttpDelete(url));
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                logger.debug("delete httpRequest url info:{},response info:{}", url, response);
                return JsonPoolUtils.fromJson(EntityUtils.toString(entity, CharEncoding.UTF_8), typeOfT);
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 发送PATCH请求
     *
     * @param url
     * @param typeOfT
     * @return
     */
    public static <T> T patch(String url, Class<T> typeOfT) {
        try {
            HttpResponse response = httpClient.execute(new HttpPatch(url));
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                logger.debug("patch httpRequest url info:{},response info:{}", url, response);
                return JsonPoolUtils.fromJson(EntityUtils.toString(entity, CharEncoding.UTF_8), typeOfT);
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 发送GET请求
     *
     * @param url
     * @param obj
     * @return
     */
    public static <T> T get(String url, Class<T> typeOfT) {
        try {
            HttpResponse response = httpClient.execute(new HttpGet(url));
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                logger.debug("get httpRequest url info:{},response info:{}", url, response);
                return JsonPoolUtils.fromJson(EntityUtils.toString(entity, CharEncoding.UTF_8), typeOfT);
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 发送PUT请求
     *
     * @param url
     * @param _class
     * @return
     */
    public static <T> T put(String url, Class<T> typeOfT) {
        try {
            HttpResponse response = httpClient.execute(new HttpPut(url));
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                logger.debug("put httpRequest url info:{},response info:{}", url, response);
                return JsonPoolUtils.fromJson(EntityUtils.toString(entity, CharEncoding.UTF_8), typeOfT);
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 发送OPTIONS请求
     *
     * @param url
     * @param typeOfT
     * @return
     */
    public static <T> T options(String url, Class<T> typeOfT) {
        try {
            HttpResponse response = httpClient.execute(new HttpOptions(url));
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                logger.debug("options httpRequest url info:{},response info:{}", url, response);
                return JsonPoolUtils.fromJson(EntityUtils.toString(entity, CharEncoding.UTF_8), typeOfT);
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

原文地址：https://www.cnblogs.com/light-zhang/p/9869230.html