applicationContext-httpclient.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"><!--引入外部配置文件 由于后期可能会引入多个配置文件 所以采用list的形式 --> <bean id="propertyPlaceholder" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:/property/httpclient.properties</value> </list> </property> </bean> <!-- 定义httpclient连接池 --> <bean id="httpClientConnectionManager" class="org.apache.http.impl.conn.PoolingHttpClientConnectionManager" destroy-method="close"> <!-- 设置连接总数 --> <property name="maxTotal" value="${http.pool.maxTotal}"></property> <!-- 设置每个地址的并发数 --> <property name="defaultMaxPerRoute" value="${http.pool.defaultMaxPerRoute}"></property> </bean> <!-- 定义 HttpClient工厂，这里使用HttpClientBuilder构建--> <bean id="httpClientBuilder" class="org.apache.http.impl.client.HttpClientBuilder" factory-method="create"> <property name="connectionManager" ref="httpClientConnectionManager"></property> </bean> <!-- 得到httpClient的实例 --> <bean id="httpClient" factory-bean="httpClientBuilder" factory-method="build"/> <!-- 定期清理无效的连接 --> <bean class="com.jt.common.util.IdleConnectionEvictor" destroy-method="shutdown"> <constructor-arg index="0" ref="httpClientConnectionManager" /> <!-- 间隔一分钟清理一次 --> <constructor-arg index="1" value="60000" /> </bean> <!-- 定义requestConfig的工厂 --> <bean id="requestConfigBuilder" class="org.apache.http.client.config.RequestConfig.Builder"> <!-- 从连接池中获取到连接的最长时间 --> <property name="connectionRequestTimeout" value="${http.request.connectionRequestTimeout}"/> <!-- 创建连接的最长时间 --> <property name="connectTimeout" value="${http.request.connectTimeout}"/> <!-- 数据传输的最长时间 --> <property name="socketTimeout" value="${http.request.socketTimeout}"/> <!-- 提交请求前测试连接是否可用 --> <property name="staleConnectionCheckEnabled" value="${http.request.staleConnectionCheckEnabled}"/> </bean> <!-- 得到requestConfig实例 --> <bean id="requestConfig" factory-bean="requestConfigBuilder" factory-method="build" /> </beans>

httpclient.properties

#从连接池中获取到连接的最长时间http.request.connectionRequestTimeout=500#5000http.request.connectTimeout=5000#数据传输的最长时间http.request.socketTimeout=30000#提交请求前测试连接是否可用http.request.staleConnectionCheckEnabled=true#设置连接总数http.pool.maxTotal=200#设置每个地址的并发数http.pool.defaultMaxPerRoute=100

HttpClientService.java

package com.jt.common.service;import java.util.ArrayList;import java.util.List;import java.util.Map;import org.apache.http.NameValuePair;import org.apache.http.client.config.RequestConfig;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.client.utils.URIBuilder;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.util.StringUtils;@Servicepublic class HttpClientService { private static final Logger LOGGER = LoggerFactory.getLogger(HttpClientService.class); @Autowired(required=false) private CloseableHttpClient httpClient; @Autowired(required=false) private RequestConfig requestConfig; /** * 说明: * 请求方式:Get和POST请求 * 参数如何添加: * http://www.jd.com/add?id=1&name=2 * 参数进行封装: * 如果用户需要传递参数,则通过指定的方法进行调用即可. * Map<String,String>类型 * * /*url = url + "?"; //www.baidu.com?id=1&name=tom& for (Map.Entry<String, String> entry: params.entrySet()) { url = url + entry.getKey() + "=" + entry.getValue() + "&"; } url = url.substring(0, url.length()-1); */ public String doGet(String url,Map<String,String> params,String charset){ String result = null; //访问服务端程序时回传的JSON数据 //判断字符集编码是否为null,如果为null设定默认字符集 if(StringUtils.isEmpty(charset)){ charset = "UTF-8"; } try { //判断参数是否为null if(params != null){ URIBuilder builder = new URIBuilder(url); for (Map.Entry<String,String> entry : params.entrySet()) { builder.addParameter(entry.getKey(),entry.getValue()); } //自动的拼接?和&符 http://www.baidu.com?id=1&name=tom url = builder.build().toString(); } //System.out.println("访问的请求:" + url); //定义请求的类型 HttpGet httpGet = new HttpGet(url); httpGet.setConfig(requestConfig); //通过httpClient发送请求 CloseableHttpResponse httpResponse = httpClient.execute(httpGet); if(httpResponse.getStatusLine().getStatusCode() == 200){ //获取返回值数据 result = EntityUtils.toString(httpResponse.getEntity(),charset); } } catch (Exception e) { e.printStackTrace(); } return result; } public String doGet(String url,Map<String,String> params){ return doGet(url, params, null); } public String doGet(String url){ return doGet(url, null, null) ; } //实现httpClient中的post请求 public String doPost(String url,Map<String,String> params,String charset){ String result = null; //判断字符集编码 if(StringUtils.isEmpty(charset)){ charset = "UTF-8"; } /** * 2.需要先创建请求对象 * 2.1创建表单实体对象封装参数. * 2.2将表单对象保存到Post对象中 * 2.3之后发起请求 */ HttpPost httpPost = new HttpPost(url); httpPost.setConfig(requestConfig); try { //判断是否有参数 if(params != null){ List<NameValuePair> parameters = new ArrayList<NameValuePair>(); //获取用户传递的数据 for (Map.Entry<String,String> entry: params.entrySet()) { BasicNameValuePair pair = new BasicNameValuePair(entry.getKey(), entry.getValue()); parameters.add(pair); } //创建表单实体对象 UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(parameters,charset); //将请求实体添加到请求对象中 httpPost.setEntity(formEntity); } //实现post请求 CloseableHttpResponse httpResponse = httpClient.execute(httpPost); if(httpResponse.getStatusLine().getStatusCode() == 200){ result = EntityUtils.toString(httpResponse.getEntity(),charset); } } catch (Exception e) { e.printStackTrace(); } return result; } public String doPost(String url,Map<String,String> params){ return doPost(url, params, null); } public String doPost(String url){ return doPost(url, null, null); }}