springboot集成HttpClient

springboot集成HttpClient

一：添加maven依赖：

<!-- 集成HttpClient-->

<dependency>

<groupId>org.apache.httpcomponents</groupId>

<artifactId>httpclient</artifactId>

</dependency>

<dependency>

<groupId>org.apache.httpcomponents</groupId>

<artifactId>httpcore</artifactId>

</dependency>

二：配置文件

#最大连接数

http.maxTotal = 100

#并发数

http.defaultMaxPerRoute = 20

#创建连接的最长时间

http.connectTimeout = 1000

#从连接池中获取到连接的最长时间

http.connectionRequestTimeout = 500

#数据传输的最长时间

http.socketTimeout = 100000000

#提交请求前测试连接是否可用

http.staleConnectionCheckEnabled = true

三：注册资源管理池

package com.metaservice.http;

import org.apache.http.client.config.RequestConfig;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClientBuilder;

import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;

import org.springframework.beans.factory.annotation. Qualifier ;

import org.springframework.beans.factory.annotation. Value ;

import org.springframework.context.annotation. Bean ;

import org.springframework.context.annotation. Configuration ;

/**

* Created by hadoop on 2018/6/13.

*/

@Configuration

public class HttpClient {

@Value ( "${http.maxTotal}" )

private Integer maxTotal ;

@Value ( "${http.defaultMaxPerRoute}" )

private Integer defaultMaxPerRoute ;

@Value ( "${http.connectTimeout}" )

private Integer connectTimeout ;

@Value ( "${http.connectionRequestTimeout}" )

private Integer connectionRequestTimeout ;

@Value ( "${http.socketTimeout}" )

private Integer socketTimeout ;

@Value ( "${http.staleConnectionCheckEnabled}" )

private boolean staleConnectionCheckEnabled ;

/**

* 首先实例化一个连接池管理器，设置最大连接数、并发连接数

* @return

*/

@Bean (name = "httpClientConnectionManager" )

public PoolingHttpClientConnectionManager getHttpClientConnectionManager(){

PoolingHttpClientConnectionManager httpClientConnectionManager = new PoolingHttpClientConnectionManager();

//最大连接数

httpClientConnectionManager.setMaxTotal( maxTotal );

//并发数

httpClientConnectionManager.setDefaultMaxPerRoute( defaultMaxPerRoute );

return httpClientConnectionManager;

}

/**

* 实例化连接池，设置连接池管理器。

* 这里需要以参数形式注入上面实例化的连接池管理器

* @param httpClientConnectionManager

* @return

*/

@Bean (name = "httpClientBuilder" )

public HttpClientBuilder getHttpClientBuilder( @Qualifier ( "httpClientConnectionManager" ) PoolingHttpClientConnectionManager httpClientConnectionManager){

//HttpClientBuilder中的构造方法被protected修饰，所以这里不能直接使用new来实例化一个HttpClientBuilder，可以使用HttpClientBuilder提供的静态方法create()来获取HttpClientBuilder对象

HttpClientBuilder httpClientBuilder = HttpClientBuilder. create ();

httpClientBuilder.setConnectionManager(httpClientConnectionManager);

return httpClientBuilder;

}

/**

* 注入连接池，用于获取httpClient

* @param httpClientBuilder

* @return

*/

@Bean

public CloseableHttpClient getCloseableHttpClient( @Qualifier ( "httpClientBuilder" ) HttpClientBuilder httpClientBuilder){

return httpClientBuilder.build();

}

/**

* Builder是RequestConfig的一个内部类

* 通过RequestConfig的custom方法来获取到一个Builder对象

* 设置builder的连接信息

* 这里还可以设置proxy，cookieSpec等属性。有需要的话可以在此设置

* @return

*/

@Bean (name = "builder" )

public RequestConfig.Builder getBuilder(){

RequestConfig.Builder builder = RequestConfig. custom ();

return builder.setConnectTimeout( connectTimeout )

.setConnectionRequestTimeout( connectionRequestTimeout )

.setSocketTimeout( socketTimeout )

.setStaleConnectionCheckEnabled( staleConnectionCheckEnabled );

}

/**

* 使用builder构建一个RequestConfig对象

* @param builder

* @return

*/

@Bean

public RequestConfig getRequestConfig( @Qualifier ( "builder" ) RequestConfig.Builder builder){

return builder.build();

}

}

四：统一返回结果

package com.metaservice.http;

/**

* Created by hadoop on 2018/6/13.

*/

public class HttpResult {

/**

* 状态码

*/

private Integer status ;

/**

* 返回数据

*/

private String data ;

public HttpResult() {

}

public HttpResult(Integer status, String data) {

this . status = status;

this . data = data;

}

public Integer getStatus() {

return status ;

}

public void setStatus(Integer status) {

this . status = status;

}

public String getData() {

return data ;

}

public void setData(String data) {

this . data = data;

}

}

五：添加守护线程，清除管理池中的无用httpClient线程

package com.metaservice.http;

import org.apache.http.conn.HttpClientConnectionManager;

import org.springframework.beans.factory.annotation. Autowired ;

import org.springframework.stereotype. Component ;

/**

* Created by hadoop on 2018/6/13.

*/

@Component

public class IdleConnectionEvictor extends Thread {

@Autowired

private HttpClientConnectionManager connMgr ;

private volatile boolean shutdown ;

public IdleConnectionEvictor() {

super ();

super .start();

}

@Override

public void run() {

try {

while (! shutdown ) {

synchronized ( this ) {

wait( 5000 );

// 关闭失效的连接

connMgr .closeExpiredConnections();

}

}

} catch (InterruptedException ex) {

// 结束

}

}

//关闭清理无效连接的线程

public void shutdown() {

shutdown = true ;

synchronized ( this ) {

notifyAll();

}

}

}

六：测试访问

package com.metaservice.asynctask.controller;

import com.metaservice.asynctask.bean.ResourceVersion;

import com.metaservice.asynctask.service.impl.ResourceVersionImpl;

import com.metaservice.http.HttpAPIService;

import org.apache.logging.log4j.LogManager;

import org.apache.logging.log4j.Logger;

import org.springframework.beans.factory.annotation. Autowired ;

import org.springframework.stereotype. Component ;

import org.springframework.web.bind.annotation. RequestMapping ;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation. RestController ;

/**

* Created by hadoop on 2018/6/11.

*/

@RestController

@RequestMapping ( "/api/thred" )

@Component

public class test {

private static final Logger logger = LogManager. getLogger (test. class );

@Autowired

private HttpAPIService httpAPIService ;

@RequestMapping ( "httpclient" )

public String httptest() throws Exception {

String str = httpAPIService .doGet( "http://www.baidu.com" );

System. out .println(str);

logger .info(str);

return "sucess" ;

}

}

参考： https://blog.youkuaiyun.com/xiao_jun_0820/article/details/50426517