spring集成httpclient配置
原 spring集成httpclient配置
wcyong wcyong
发布时间: 2016/03/12 21:39 阅读: 1712 收藏: 29 点赞: 5 评论: 4
摘要
spring httpclient
HTTP 协议可能是现在 Internet 上使用得最多、最重要的协议了，越来越多的 Java 应用程序需要直接通过 HTTP 协议来访问网络资源。虽然在 JDK 的 java.net 包中已经提供了访问 HTTP 协议的基本功能，但是对于大部分应用程序来说，JDK 库本身提供的功能还不够丰富和灵活。HttpClient 是 Apache Jakarta Common 下的子项目，用来提供高效的、最新的、功能丰富的支持 HTTP 协议的客户端编程工具包，并且它支持 HTTP 协议最新的版本和建议。
spring与httpclient集成方式如下：
引入jar包
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.2</version>
</dependency>2.编写执行get和post请求的java类
package com.wee.common.service;
import java.io.IOException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
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.ContentType;
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.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.wee.common.bean.HttpResult;
@Service
public class HttpClientService {
@Autowired
private CloseableHttpClient httpClient;
@Autowired
private RequestConfig requestConfig;
/**
* 执行GET请求
*
* @param url
* @return
* @throws IOException
* @throws ClientProtocolException
*/
public String doGet(String url) throws ClientProtocolException, IOException {
// 创建http GET请求
HttpGet httpGet = new HttpGet(url);
httpGet.setConfig(this.requestConfig);
CloseableHttpResponse response = null;
try {
// 执行请求
response = httpClient.execute(httpGet);
// 判断返回状态是否为200
if (response.getStatusLine().getStatusCode() == 200) {
return EntityUtils.toString(response.getEntity(), "UTF-8");
}
} finally {
if (response != null) {
response.close();
}
}
return null;
}
/**
* 带有参数的GET请求
*
* @param url
* @param params
* @return
* @throws URISyntaxException
* @throws IOException
* @throws ClientProtocolException
*/
public String doGet(String url, Map<String, String> params)
throws ClientProtocolException, IOException, URISyntaxException {
URIBuilder uriBuilder = new URIBuilder(url);
for (String key : params.keySet()) {
uriBuilder.addParameter(key, params.get(key));
}
return this.doGet(uriBuilder.build().toString());
}
/**
* 执行POST请求
*
* @param url
* @param params
* @return
* @throws IOException
*/
public HttpResult doPost(String url, Map<String, String> params) throws IOException {
// 创建http POST请求
HttpPost httpPost = new HttpPost(url);
httpPost.setConfig(this.requestConfig);
if (params != null) {
// 设置2个post参数，一个是scope、一个是q
List<NameValuePair> parameters = new ArrayList<NameValuePair>();
for (String key : params.keySet()) {
parameters.add(new BasicNameValuePair(key, params.get(key)));
}
// 构造一个form表单式的实体
UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(parameters, "UTF-8");
// 将请求实体设置到httpPost对象中
httpPost.setEntity(formEntity);
}
CloseableHttpResponse response = null;
try {
// 执行请求
response = httpClient.execute(httpPost);
return new HttpResult(response.getStatusLine().getStatusCode(),
EntityUtils.toString(response.getEntity(), "UTF-8"));
} finally {
if (response != null) {
response.close();
}
}
}
/**
* 执行POST请求
*
* @param url
* @return
* @throws IOException
*/
public HttpResult doPost(String url) throws IOException {
return this.doPost(url, null);
}
/**
* 提交json数据
*
* @param url
* @param json
* @return
* @throws ClientProtocolException
* @throws IOException
*/
public HttpResult doPostJson(String url, String json) throws ClientProtocolException, IOException {
// 创建http POST请求
HttpPost httpPost = new HttpPost(url);
httpPost.setConfig(this.requestConfig);
if (json != null) {
// 构造一个form表单式的实体
StringEntity stringEntity = new StringEntity(json, ContentType.APPLICATION_JSON);
// 将请求实体设置到httpPost对象中
httpPost.setEntity(stringEntity);
}
CloseableHttpResponse response = null;
try {
// 执行请求
response = this.httpClient.execute(httpPost);
return new HttpResult(response.getStatusLine().getStatusCode(),
EntityUtils.toString(response.getEntity(), "UTF-8"));
} finally {
if (response != null) {
response.close();
}
}
}
}
HttpResult.java
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;
}
}
3.spring和httpClient整合配置文件
<!-- 定义连接管理器 -->
<bean id="httpClientConnectionManager"
class="org.apache.http.impl.conn.PoolingHttpClientConnectionManager"
destroy-method="close">
<!-- 最大连接数 -->
<property name="maxTotal" value="${http.maxTotal}" />
<!-- 设置每个主机地址的并发数 -->
<property name="defaultMaxPerRoute" value="${http.defaultMaxPerRoute}" />
</bean>
<!-- httpclient对象构建器 -->
<bean id="httpClientBuilder" class="org.apache.http.impl.client.HttpClientBuilder">
<!-- 设置连接管理器 -->
<property name="connectionManager" ref="httpClientConnectionManager" />
</bean>
<!-- 定义Httpclient对象 -->
<bean id="httpClient" class="org.apache.http.impl.client.CloseableHttpClient"
factory-bean="httpClientBuilder" factory-method="build" scope="prototype">
</bean>
<!-- 定义清理无效连接 -->
<bean class="com.taotao.common.httpclient.IdleConnectionEvictor"
destroy-method="shutdown">
<constructor-arg index="0" ref="httpClientConnectionManager" />
</bean>
<bean id="requestConfigBuilder" class="org.apache.http.client.config.RequestConfig.Builder">
<!-- 创建连接的最长时间 -->
<property name="connectTimeout" value="${http.connectTimeout}"/>
<!-- 从连接池中获取到连接的最长时间 -->
<property name="connectionRequestTimeout" value="${http.connectionRequestTimeout}"/>
<!-- 数据传输的最长时间 -->
<property name="socketTimeout" value="${http.socketTimeout}"/>
<!-- 提交请求前测试连接是否可用 -->
<property name="staleConnectionCheckEnabled" value="${http.staleConnectionCheckEnabled}"/>
</bean>
<!-- 定义请求参数 -->
<bean id="requestConfig" class="org.apache.http.client.config.RequestConfig" factory-bean="requestConfigBuilder" factory-method="build">
</bean>4.httpclient.properties
httpClient.maxTotal=200
httpClient.defaultMaxPerRoute=50
httpClient.connectTimeout=1000
httpClient.connectionRequestTimeout=500
httpClient.socketTimeout=10000
httpClient.staleConnectionCheckEnabled=true5.使用一个单独的线程完成连接池中的无效链接的清理
package com.wee.common.httpclient;
import org.apache.http.conn.HttpClientConnectionManager;
public class IdleConnectionEvictor extends Thread {
private final HttpClientConnectionManager connMgr;
private volatile boolean shutdown;
public IdleConnectionEvictor(HttpClientConnectionManager connMgr) {
this.connMgr = connMgr;
// 启动当前线程
this.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
}
}
public void shutdown() {
shutdown = true;
synchronized (this) {
notifyAll();
}
}
}
