springboot中使用RestTemplate

一。导入依赖

pom.xml

<dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> </dependency>

二。springboot引入配置


package com.jztey.gxdemo; import java.nio.charset.Charset;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.util.Iterator;
import java.util.List; import org.apache.http.impl.client.CloseableHttpClient;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.web.client.RestOperations;
import org.springframework.web.client.RestTemplate; @Configuration
public class RestConfiguration { @Bean @ConditionalOnMissingBean({RestOperations.class, RestTemplate.class}) public RestOperations restOperations() { //        SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory(); 
//        requestFactory.setReadTimeout(5000); 
//        requestFactory.setConnectTimeout(5000); CloseableHttpClient httpClient = null; try { httpClient = HttpClientUtils.acceptsUntrustedCertsHttpClient(); } catch (KeyManagementException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (KeyStoreException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block e.printStackTrace(); } HttpComponentsClientHttpRequestFactory clientHttpRequestFactory = new HttpComponentsClientHttpRequestFactory(httpClient); RestTemplate restTemplate = new RestTemplate(clientHttpRequestFactory); // 使用 utf-8 编码集的 conver 替换默认的 conver（默认的 string conver 的编码集为 "ISO-8859-1"） List<HttpMessageConverter<?>> messageConverters = restTemplate.getMessageConverters(); Iterator<HttpMessageConverter<?>> iterator = messageConverters.iterator(); while (iterator.hasNext()) { HttpMessageConverter<?> converter = iterator.next(); if (converter instanceof StringHttpMessageConverter) { iterator.remove(); } } messageConverters.add(new StringHttpMessageConverter(Charset.forName("UTF-8"))); return restTemplate; }
}

由于需要支持https 需要自定义httpclient 注入

package com.jztey.gxdemo; import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.ssl.TrustStrategy; import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate; /** * Created by Administrator on 2015/6/8. */
public class HttpClientUtils { public static CloseableHttpClient acceptsUntrustedCertsHttpClient() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException { HttpClientBuilder b = HttpClientBuilder.create(); // setup a Trust Strategy that allows all certificates. // SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() { public boolean isTrusted(X509Certificate[] arg0, String arg1) throws CertificateException { return true; } }).build(); b.setSSLContext(sslContext); // don't check Hostnames, either. //      -- use SSLConnectionSocketFactory.getDefaultHostnameVerifier(), if you don't want to weaken HostnameVerifier hostnameVerifier = NoopHostnameVerifier.INSTANCE; // here's the special part: //      -- need to create an SSL Socket Factory, to use our weakened "trust strategy"; //      -- and create a Registry, to register it. // SSLConnectionSocketFactory sslSocketFactory = new SSLConnectionSocketFactory(sslContext, hostnameVerifier); Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create() .register("http", PlainConnectionSocketFactory.getSocketFactory()) .register("https", sslSocketFactory) .build(); // now, we create connection-manager using our Registry. //      -- allows multi-threaded use PoolingHttpClientConnectionManager connMgr = new PoolingHttpClientConnectionManager( socketFactoryRegistry); connMgr.setMaxTotal(200); connMgr.setDefaultMaxPerRoute(100); b.setConnectionManager( connMgr); // finally, build the HttpClient; //      -- done! CloseableHttpClient client = b.build(); return client; } }

三.使用

    @Autowired private RestOperations restOperations;

    @Test public void testHttpGet(){ String url = "https://internal.api.ehaoyao.com/logistics/v1.1/company"; OauthParam param = new OauthParam(); param.setGrantType("client_credentials"); param.setClientId("02bceec105cd4462b2dadd892fdba943"); param.setClientSecret("fa50ffdbbbf9442f8958e1493e7a1b41"); param.setScope("mall"); String token = oauthService.getToken(param); url=url+"?access_token="+token; Map<String,Object> uriVariables = new HashMap<String,Object>(); uriVariables.put("access_token", token); JSONArray result =  restOperations.getForObject(url, JSONArray.class); System.out.println(result.toString()); }

--------------

学习视频

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tomcat源码解析
https://study.163.com/course/introduction/1209535854.htm

Springmvc源码解析
https://study.163.com/course/introduction/1209536851.htm

dubbo源码解析
https://study.163.com/course/introduction/1209648816.htm

源码悟道tomcat+springmvc解析
https://study.163.com/course/introduction/1209399899.htm

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