[万能工具类] HttpUtil-优快云博客

本文链接：https://blog.youkuaiyun.com/cnnlkj/article/details/113727221

本文介绍了一个万能的Java HTTP工具类HttpUtil，它简化了HTTP请求的处理。通过在项目中引入pom.xml的相关依赖，开发者可以轻松进行GET、POST等HTTP操作。

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import lombok.extern.slf4j.Slf4j;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.ResponseBody;
import org.apache.commons.lang3.StringUtils;
import org.apache.http.*;
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.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.conn.ssl.X509HostnameVerifier;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.DefaultProxyRoutePlanner;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;

import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocket;
import java.io.IOException;
import java.nio.charset.Charset;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;


@Slf4j
public class HttpUtil {

    private HttpUtil() {
    }

    private static CloseableHttpClient httpClient = null;
    public static final String CHARSET = "UTF-8";
    private static PoolingHttpClientConnectionManager connMgr;
    private static RequestConfig requestConfig;
    private static final int MAX_TIMEOUT = 50000;

    static {
        // 设置连接池
        connMgr = new PoolingHttpClientConnectionManager();
        // 设置连接池大小
        connMgr.setMaxTotal(100);
        connMgr.setDefaultMaxPerRoute(connMgr.getMaxTotal());

        RequestConfig.Builder configBuilder = RequestConfig.custom();
        // 设置连接超时
        configBuilder.setConnectTimeout(MAX_TIMEOUT);
        // 设置读取超时
        configBuilder.setSocketTimeout(MAX_TIMEOUT);
        // 设置从连接池获取连接实例的超时
        configBuilder.setConnectionRequestTimeout(MAX_TIMEOUT);
        requestConfig = configBuilder.build();
    }

    /**
     * HTTP Get 获取内容
     *
     * @param url    请求的url地址 ?之前的地址
     * @param params 请求的参数
     * @return 页面内容
     */
    public static String sendGet(String url, Map<String, Object> params) {
        if (StringUtils.isEmpty(url)) {
            System.out.println("请求地址不合法" + url);
            return null;
        }
        try {
            httpClient = HttpClientBuilder.create().setDefaultRequestConfig(requestConfig).build();
            if (params != null && !params.isEmpty()) {
                List<NameValuePair> pairs = new ArrayList<NameValuePair>(params.size());
                for (String key : params.keySet()) {
                    pairs.add(new BasicNameValuePair(key, params.get(key).toString()));
                }
                url += "?" + EntityUtils.toString(new UrlEncodedFormEntity(pairs, CHARSET));
            }
            HttpGet httpGet = new HttpGet(url);
            HttpResponse response = httpClient.execute(httpGet);
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode != 200) {
                httpGet.abort();
                throw new RuntimeException("HttpClient,error status code :" + statusCode);
            }
            HttpEntity entity = response.getEntity();
            String result = null;
            if (entity != null) {
                result = EntityUtils.toString(enti