创建HttpPost和HttpGet请求

我就是我 2022-10-13 05:22 148阅读 0赞

1、创建工具类 HttpClient

import com.alibaba.fastjson.JSON;
    import org.apache.http.HttpStatus;
    import org.apache.http.client.config.RequestConfig;
    import org.apache.http.client.methods.*;
    import org.apache.http.client.utils.URIBuilder;
    import org.apache.http.entity.StringEntity;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.util.EntityUtils;
    
    import java.io.IOException;
    import java.nio.charset.Charset;
    import java.util.Map;
    import java.util.Set;
    
    public class HttpClient {
    
        // 编码格式。发送编码格式统一用UTF-8
        private static final String ENCODING = "UTF-8";
    
        // 设置连接超时时间，单位毫秒。
        private static final int CONNECT_TIMEOUT = 100000;
    
        // 请求获取数据的超时时间(即响应时间)，单位毫秒。
        private static final int SOCKET_TIMEOUT = 100000;
    
        /**
         * 发送post请求；带请求头和请求参数
         *
         * @param url  请求地址
         * @param data 请求参数集合
         * @return
         * @throws Exception
         */
        public static HttpClientResult doPost(String url, Map<String, Object> data) throws Exception {
            // 创建httpClient对象-https地址
            CloseableHttpClient httpClient = new SSLClient();
    
            // 创建http对象
            HttpPost httpPost = new HttpPost(url);
            /**
             * setConnectTimeout：设置连接超时时间，单位毫秒。
             * setConnectionRequestTimeout：设置从connect Manager(连接池)获取Connection
             * 超时时间，单位毫秒。这个属性是新加的属性，因为目前版本是可以共享连接池的。
             * setSocketTimeout：请求获取数据的超时时间(即响应时间)，单位毫秒。 如果访问一个接口，多少时间内无法返回数据，就直接放弃此次调用。
             */
            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
            httpPost.setConfig(requestConfig);
            httpPost.addHeader("Content-type", "application/json; charset=utf-8");
            httpPost.setHeader("Accept", "application/json");
    
            // 设置请求参数
            httpPost.setEntity(new StringEntity(JSON.toJSONString(data), Charset.forName("utf-8")));
    
            // 创建httpResponse对象
            CloseableHttpResponse httpResponse = null;
    
            try {
                // 执行请求并获得响应结果
                return getHttpClientResult(httpResponse, httpClient, httpPost);
            } finally {
                // 释放资源
                release(httpResponse, httpClient);
            }
        }
    
        /**
         * 发送get请求；带请求参数
         *
         * @param url  请求地址
         * @param data 参数集合
         * @return 返回结果
         */
        public static HttpClientResult doGet(String url, Map<String, Object> data) throws Exception {
            // 创建httpClient对象-https地址
            CloseableHttpClient httpClient = new SSLClient();
    
            // 创建访问的地址
            URIBuilder uriBuilder = new URIBuilder(url);
            if (data != null) {
                Set<Map.Entry<String, Object>> entrySet = data.entrySet();
                for (Map.Entry<String, Object> entry : entrySet) {
                    uriBuilder.setParameter(entry.getKey(), String.valueOf(entry.getValue()));
                }
            }
    
            HttpGet httpGet = new HttpGet(uriBuilder.build());
            RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(CONNECT_TIMEOUT).setSocketTimeout(SOCKET_TIMEOUT).build();
            httpGet.setConfig(requestConfig);
            httpGet.addHeader("Content-type", "application/json; charset=utf-8");
            httpGet.setHeader("Accept", "application/json");
    
            // 创建httpResponse对象
            CloseableHttpResponse httpResponse = null;
    
            try {
                return getHttpClientResult(httpResponse, httpClient, httpGet);
            } finally {
                release(httpResponse, httpClient);
            }
        }
    
        /**
         * Description: 获得响应结果
         *
         * @param httpResponse
         * @param httpClient
         * @param httpMethod
         * @return
         * @throws Exception
         */
        public static HttpClientResult getHttpClientResult(CloseableHttpResponse httpResponse,
                                                           CloseableHttpClient httpClient, HttpRequestBase httpMethod) throws Exception {
            // 执行请求
            httpResponse = httpClient.execute(httpMethod);
    
            // 获取返回结果
            if (httpResponse != null && httpResponse.getStatusLine() != null) {
                String content = "";
                if (httpResponse.getEntity() != null) {
                    content = EntityUtils.toString(httpResponse.getEntity(), ENCODING);
                }
                return new HttpClientResult(httpResponse.getStatusLine().getStatusCode(), content);
            }
            return new HttpClientResult(HttpStatus.SC_INTERNAL_SERVER_ERROR);
        }
    
        /**
         * Description: 释放资源
         *
         * @param httpResponse 返回
         * @param httpClient   请求
         */
        public static void release(CloseableHttpResponse httpResponse, CloseableHttpClient httpClient) throws IOException {
            // 释放资源
            if (httpResponse != null) {
                httpResponse.close();
            }
            if (httpClient != null) {
                httpClient.close();
            }
        }
    
    }

2、创建返回数据格式封装类

import lombok.Data;
    
    import java.io.Serializable;
    
    /**
     * @author 詹浩
     * @date 2020/2/11 0011
     */
    @Data
    public class HttpClientResult implements Serializable {
    
        /**
         * 响应状态码
         */
        private int code;
    
        /**
         * 响应数据
         */
        private String content;
    
        public HttpClientResult(int code) {
            this.code = code;
        }
    
        public HttpClientResult(int code, String content) {
            this.code = code;
            this.content = content;
        }
    }

3、创建 SSLClient 类

import org.apache.http.conn.ClientConnectionManager;
    import org.apache.http.conn.scheme.Scheme;
    import org.apache.http.conn.scheme.SchemeRegistry;
    import org.apache.http.conn.ssl.SSLSocketFactory;
    import org.apache.http.impl.client.DefaultHttpClient;
    
    import javax.net.ssl.SSLContext;
    import javax.net.ssl.TrustManager;
    import javax.net.ssl.X509TrustManager;
    import java.security.cert.CertificateException;
    import java.security.cert.X509Certificate;
    
    public class SSLClient extends DefaultHttpClient {
    
        public SSLClient() throws Exception {
            super();
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {
                @Override
                public void checkClientTrusted(X509Certificate[] chain,
                                               String authType) throws CertificateException {
                }
    
                @Override
                public void checkServerTrusted(X509Certificate[] chain,
                                               String authType) throws CertificateException {
                }
    
                @Override
                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
            };
            ctx.init(null, new TrustManager[]{tm}, null);
            SSLSocketFactory ssf = new SSLSocketFactory(ctx, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
            ClientConnectionManager ccm = this.getConnectionManager();
            SchemeRegistry sr = ccm.getSchemeRegistry();
            sr.register(new Scheme("https", 443, ssf));
        }
    
    }

4、所需的maven依赖

<dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.2</version>
    </dependency>
    
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpcore</artifactId>
        <version>4.4.5</version>
    </dependency>