com.beginner.core.utils.HttpUtil.java Source code

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Here is the source code for com.beginner.core.utils.HttpUtil.java

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/*
 * Copyright 2015-9999 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.beginner.core.utils;

import org.apache.commons.lang3.StringUtils;
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.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
* <b>??</b>HttpUtil<br/>
* <b>??</b>HTTP<br/>
* <b></b>Hsiao Lin Studio<br/>
* <b></b><br/>
* <b></b>20150521 ?6:18:18<br/>
* <b></b><br/>
* @version 1.0.0<br/>
*/
public class HttpUtil {

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

    /**
     * <p>To request the POST way.</p>
     * 
     * @param url      request URI
     * @param json      request parameter(json format string)
     * @param timeout   request timeout time in milliseconds(The default timeout time for 30 seconds.)
     * @return String   response result
     * @throws Exception
     * @since 1.0.0
     */
    public static String post(String url, String json, Integer timeout) throws Exception {

        // Validates input
        if (StringUtils.isBlank(url))
            throw new IllegalArgumentException("The url cannot be null and cannot be empty.");

        //The default timeout time for 30 seconds
        if (null == timeout)
            timeout = 30000;

        String result = null;
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse httpResponse = null;

        try {
            httpClient = HttpClients.createDefault();
            RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(timeout)
                    .setConnectTimeout(timeout).build();

            HttpPost httpPost = new HttpPost(url);
            httpPost.setConfig(requestConfig);
            httpPost.setHeader("Content-Type", "text/plain");
            httpPost.setEntity(new StringEntity(json, "UTF-8"));

            httpResponse = httpClient.execute(httpPost);

            HttpEntity entity = httpResponse.getEntity();

            result = EntityUtils.toString(entity);

            EntityUtils.consume(entity);
        } catch (Exception e) {
            logger.error("POST?", e);
            return null;
        } finally {
            if (null != httpResponse)
                httpResponse.close();
            if (null != httpClient)
                httpClient.close();
        }
        return result;
    }

    /**
     * <p>To request the GET way.</p>
     * 
     * @param url      request URI
     * @param timeout   request timeout time in milliseconds(The default timeout time for 30 seconds.)
     * @return String   response result
     * @throws Exception
     * @since 1.0.0
     */
    public static String get(String url, Integer timeout) throws Exception {

        // Validates input
        if (StringUtils.isBlank(url))
            throw new IllegalArgumentException("The url cannot be null and cannot be empty.");

        //The default timeout time for 30 seconds
        if (null == timeout)
            timeout = 30000;

        CloseableHttpClient httpClient = HttpClients.createDefault();

        CloseableHttpResponse httpResponse = null;
        String result = null;

        try {
            RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(timeout)
                    .setConnectTimeout(timeout).build();

            HttpGet httpGet = new HttpGet(url);
            httpGet.setConfig(requestConfig);

            httpResponse = httpClient.execute(httpGet);

            HttpEntity entity = httpResponse.getEntity();
            result = EntityUtils.toString(entity);

            EntityUtils.consume(entity);
        } catch (Exception e) {
            logger.error("GET?", e);
            return null;
        } finally {
            if (null != httpResponse)
                httpResponse.close();
            if (null != httpClient)
                httpClient.close();
        }
        return result;
    }
}