SpringBoot 使用okhttp3

1.添加pom.xml依赖

        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.6.0</version>
        </dependency>

2.配置类

import java.security.KeyManagementException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.concurrent.TimeUnit;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import okhttp3.ConnectionPool;
import okhttp3.OkHttpClient;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Created by qhong on 2018/7/3 16:52
 **/
@Configuration
public class OkHttpConfig {

    @Bean
    public X509TrustManager x509TrustManager() {
        return new X509TrustManager() {
            @Override
            public void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
            }
            @Override
            public void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
            }
            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return new X509Certificate[0];
            }
        };
    }
    @Bean
    public SSLSocketFactory sslSocketFactory() {
        try {
            //信任任何链接
            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, new TrustManager[]{x509TrustManager()}, new SecureRandom());
            return sslContext.getSocketFactory();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (KeyManagementException e) {
            e.printStackTrace();
        }
        return null;
    }
    /**
     * Create a new connection pool with tuning parameters appropriate for a single-user application.
     * The tuning parameters in this pool are subject to change in future OkHttp releases. Currently
     */
    @Bean
    public ConnectionPool pool() {
        return new ConnectionPool(200, 5, TimeUnit.MINUTES);
    }
    @Bean
    public OkHttpClient okHttpClient() {
        return new OkHttpClient.Builder()
                .sslSocketFactory(sslSocketFactory(), x509TrustManager())
                .retryOnConnectionFailure(false)//是否开启缓存
                .connectionPool(pool())//连接池
                .connectTimeout(10L, TimeUnit.SECONDS)
                .readTimeout(10L, TimeUnit.SECONDS)
                .build();
    }
}

3.工具类：

import java.util.Iterator;
import java.util.Map;
import okhttp3.FormBody;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import org.apache.commons.lang3.exception.ExceptionUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Created by qhong on 2018/7/3 16:55
 **/
public class OkHttpUtil{

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

    /**
     * 根据map获取get请求参数
     * @param queries
     * @return
     */
    private static StringBuffer getQueryString(String url,Map<String,String> queries){
        StringBuffer sb = new StringBuffer(url);
        if (queries != null && queries.keySet().size() > 0) {
            boolean firstFlag = true;
            Iterator iterator = queries.entrySet().iterator();
            while (iterator.hasNext()) {
                Map.Entry entry = (Map.Entry<String, String>) iterator.next();
                if (firstFlag) {
                    sb.append("?" + entry.getKey() + "=" + entry.getValue());
                    firstFlag = false;
                } else {
                    sb.append("&" + entry.getKey() + "=" + entry.getValue());
                }
            }
        }
        return sb;
    }

    /**
     * 调用okhttp的newCall方法
     * @param request
     * @return
     */
    private static String execNewCall(Request request){
        Response response = null;
        try {
            OkHttpClient okHttpClient = new OkHttpClient();
            response = okHttpClient.newCall(request).execute();
            int status = response.code();
            if (response.isSuccessful()) {
                return response.body().string();
            }
        } catch (Exception e) {
            logger.error("okhttp3 put error >> ex = {}", ExceptionUtils.getStackTrace(e));
        } finally {
            if (response != null) {
                response.close();
            }
        }
        return "";
    }

    /**
     * get
     * @param url     请求的url
     * @param queries 请求的参数，在浏览器？后面的数据，没有可以传null
     * @return
     */
    public static String get(String url, Map<String, String> queries) {
        StringBuffer sb = getQueryString(url,queries);
        Request request = new Request.Builder()
                .url(sb.toString())
                .build();
        return execNewCall(request);
    }

    /**
     * post
     *
     * @param url    请求的url
     * @param params post form 提交的参数
     * @return
     */
    public static String postFormParams(String url, Map<String, String> params) {
        FormBody.Builder builder = new FormBody.Builder();
        //添加参数
        if (params != null && params.keySet().size() > 0) {
            for (String key : params.keySet()) {
                builder.add(key, params.get(key));
            }
        }
        Request request = new Request.Builder()
                .url(url)
                .post(builder.build())
                .build();
        return execNewCall(request);
    }


    /**
     * Post请求发送JSON数据....{"name":"zhangsan","pwd":"123456"}
     * 参数一：请求Url
     * 参数二：请求的JSON
     * 参数三：请求回调
     */
    public static String postJsonParams(String url, String jsonParams) {
        RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), jsonParams);
        Request request = new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();
        return execNewCall(request);
    }

    /**
     * Post请求发送xml数据....
     * 参数一：请求Url
     * 参数二：请求的xmlString
     * 参数三：请求回调
     */
    public static String postXmlParams(String url, String xml) {
        RequestBody requestBody = RequestBody.create(MediaType.parse("application/xml; charset=utf-8"), xml);
        Request request = new Request.Builder()
                .url(url)
                .post(requestBody)
                .build();
        return execNewCall(request);
    }
}

https://miaoxinwei.github.io/2017/04/21/spring-%E9%9B%86%E6%88%90-okhttp3/

https://blog.csdn.net/wangh92/article/details/79714375

https://www.programcreek.com/java-api-examples/?code=hjw541988478/OkHttpTutorial/OkHttpTutorial-master/app/src/main/java/in/harvestday/okhttpdemo/OkHttpUtil.java

https://github.com/guozhengXia/OkHttpUtils

https://github.com/hongyangAndroid/okhttputils