java中http請求之restTemplate配置超時時間問題解決

更新時間：2023年05月31日 10:31:28 作者：oh?my?gald

這篇文章主要介紹了java中http請求之restTemplate配置超時時間,本文給大家分享三種解決方法，結(jié)合實例代碼給大家介紹的非常詳細，對大家的學習或工作具有一定的參考借鑒價值，需要的朋友可以參考下

問題：http請求發(fā)起后接收不到返回數(shù)據(jù)?。?！【測試環(huán)境沒出問題，發(fā)到正式環(huán)境就有問題】

項目中通過restTemplate發(fā)起請求：

        log.info("請求入?yún)?{}",JSON.toJSONString(request));//打印日志1
        // 配置http請求的連接超時時間和讀取超時時間
        HttpsClientRequestFactory factory = new HttpsClientRequestFactory();
        factory.setConnectTimeout(60 * 1000);
        factory.setReadTimeout(5 * 60 * 1000);
        RestTemplate restTemplate = new RestTemplate(factory);
        Result<InventoryResult> result = restTemplate.postForObject(address.concat(inventoryUrl), request, Result.class);
        log.info("庫存同步，返回數(shù)據(jù): {}", result);//打印日志2

打印日志1內(nèi)容為：

http請求入?yún)?{data=[{ productStatus=10,skuCode=null}], messageId=ewpfpr1t6ey5r6qj0su0w1h6rt73hr,token=vgvU5EJKuZbuHii7WH6pTINp40ZRicaqLz4dq5P7L6pDzWir8EEGZhCKPucQjljsw69EHasEy+iJfdTofDg==}

日志打印2沒有打印內(nèi)容?。?！

最后發(fā)現(xiàn)是因為測試環(huán)境中數(shù)據(jù)量較小，http請求后，很快能得到相應，而正式環(huán)境數(shù)據(jù)量較大，沒有及時得到響應，連接或者讀取超時?。?！

三種解決方式：

第一種

1、添加HttpsClientRequestFactory 類，并繼承SimpleClientHttpRequestFactory

/**
 * 兼容調(diào)Https接口
 */
public class HttpsClientRequestFactory extends SimpleClientHttpRequestFactory {
    @Override
    protected void prepareConnection(HttpURLConnection connection, String httpMethod)
            throws IOException {
        if (connection instanceof HttpsURLConnection) {
            prepareHttpsConnection((HttpsURLConnection) connection);
        }
        super.prepareConnection(connection, httpMethod);
    }
    private void prepareHttpsConnection(HttpsURLConnection connection) {
        connection.setHostnameVerifier(new SkipHostnameVerifier());
        try {
            connection.setSSLSocketFactory(createSslSocketFactory());
        }
        catch (Exception ex) {
            // Ignore
        }
    }
    private SSLSocketFactory createSslSocketFactory() throws Exception {
        SSLContext context = SSLContext.getInstance("TLS");
        context.init(null, new TrustManager[] { new SkipX509TrustManager() },
                new SecureRandom());
        return context.getSocketFactory();
    }
    private class SkipHostnameVerifier implements HostnameVerifier {
        @Override
        public boolean verify(String s, SSLSession sslSession) {
            return true;
        }
    }
    private static class SkipX509TrustManager implements X509TrustManager {
        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return new X509Certificate[0];
        }
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType) {
        }
        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType) {
        }
    }
}

2、使用restTemplate發(fā)起請求前先設置連接和超時時間即可；

//配置http請求的連接超時時間和讀取超時時間
HttpsClientRequestFactory factory = new HttpsClientRequestFactory();
factory.setConnectTimeout(60 * 1000);
factory.setReadTimeout(5 * 60 * 1000);
RestTemplate restTemplate = new RestTemplate(factory);
BaseResult<QueryInventoryResult> result = restTemplate.postForObject(address.concat(inventoryUrl), request, Result.class);

或者通過容器加載配置類，然后設置超時時間進去，使用的時候直接注入restTemplate即可?。?/p>

@Configuration
public class RestConfig {
    //60 * 1000
    @Value("${rest.connectTimeout:60000}")
    private int connectTimeout;
    //5 * 60 * 1000
    @Value("${rest.readTimeout:300000}")
    private int readTimeout;
    @Bean
    public RestTemplate restTemplate() {
        SimpleClientHttpRequestFactory simpleClientHttpRequestFactory = new SimpleClientHttpRequestFactory();
        simpleClientHttpRequestFactory.setConnectTimeout(connectTimeout);
        simpleClientHttpRequestFactory.setReadTimeout(readTimeout);
        RestTemplate restTemplate = new RestTemplate(simpleClientHttpRequestFactory);
        return restTemplate;
    }

第二種

@Configuration
public class RestConfig {
    //60 * 1000
    @Value("${rest.connectTimeout:60000}")
    private int connectTimeout;
    //5 * 60 * 1000
    @Value("${rest.readTimeout:300000}")
    private int readTimeout;  
    @Value("${rest.connectionRequestTimeout:300000}")
    private int connectionRequestTimeout;  
  /**
     * 使用 HttpComponentsClientHttpRequestFactory創(chuàng)建http請求（推薦）
     */
    @Bean
    public RestTemplate restTemplate() {
        HttpComponentsClientHttpRequestFactory httpRequestFactory = new HttpComponentsClientHttpRequestFactory();
        httpRequestFactory.setConnectionRequestTimeout(connectionRequestTimeout);
        httpRequestFactory.setConnectTimeout(connectTimeout);
        httpRequestFactory.setReadTimeout(readTimeout);
        return new RestTemplate(httpRequestFactory);
    }
}

第三種（基于第二種升級）

@Configuration
public class RestConfig {
    /**
     * 高并發(fā)采用HttpClient連接池
     */
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate(httpRequestFactory());
    }
    @Bean
    public ClientHttpRequestFactory httpRequestFactory() {
        return new HttpComponentsClientHttpRequestFactory(httpClient());
    }
    @Bean
    public HttpClient httpClient() {
        Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create()
                .register("http", PlainConnectionSocketFactory.getSocketFactory())
                .register("https", SSLConnectionSocketFactory.getSocketFactory())
                .build();
        PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager(registry);
        //設置整個連接池最大連接數(shù)
        connectionManager.setMaxTotal(400);
        //路由是對maxTotal的細分
        connectionManager.setDefaultMaxPerRoute(100);
        RequestConfig requestConfig = RequestConfig.custom()
                .setSocketTimeout(30000)  //返回數(shù)據(jù)的超時時間
                .setConnectTimeout(20000) //連接上服務器的超時時間
                .setConnectionRequestTimeout(1000) //從連接池中獲取連接的超時時間
                .build();
        return HttpClientBuilder.create()
                .setDefaultRequestConfig(requestConfig)
                .setConnectionManager(connectionManager)
                .build();
    }
}

問題得到解決、、、、、、

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