spring boot 整合 HttpClient
第一步：引入HttpClient 的jar包
1、httpClient 5.0 开始支持异步（Async）请求；
2、httpclient 版本过低上传文件会出，原因是 org.apache.http.entity.ContentType 没有方法 withParameters(final NameValuePair... params)；
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
<!-- httpClient文件上传需要 -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
</dependency>
第二步：创建一个httpClient的配置类
package com.123.lenovo.adapter.se.config; import java.security.KeyStore;
import javax.net.ssl.SSLContext; import org.apache.http.HeaderElement;
import org.apache.http.HeaderElementIterator;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.conn.ConnectionKeepAliveStrategy;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustAllStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicHeaderElementIterator;
import org.apache.http.protocol.HTTP;
import org.apache.http.protocol.HttpContext;
import org.apache.http.ssl.SSLContexts;
import org.elasticsearch.Build;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration; import com.123.lenovo.adapter.se.common.IdleConnectionEvictor; @Configuration
public class HttpClientConfig { @Value("${http_max_total}")
private int maxTotal = 800; @Value("${http_default_max_perRoute}")
private int defaultMaxPerRoute = 80; @Value("${http_validate_after_inactivity}")
private int validateAfterInactivity = 1000; @Value("${http_connection_request_timeout}")
private int connectionRequestTimeout = 5000; @Value("${http_connection_timeout}")
private int connectTimeout = 10000; @Value("${http_socket_timeout}")
private int socketTimeout = 20000; @Value("${waitTime}")
private int waitTime = 30000; @Value("${idleConTime}")
private int idleConTime = 3; @Value("${retryCount}")
private int retryCount = 3; @Bean
public PoolingHttpClientConnectionManager createPoolingHttpClientConnectionManager() {
PoolingHttpClientConnectionManager poolmanager = new PoolingHttpClientConnectionManager();
poolmanager.setMaxTotal(maxTotal);
poolmanager.setDefaultMaxPerRoute(defaultMaxPerRoute);
poolmanager.setValidateAfterInactivity(validateAfterInactivity);
return poolmanager;
} @Bean
public CloseableHttpClient createHttpClient(PoolingHttpClientConnectionManager poolManager) {
HttpClientBuilder httpClientBuilder = HttpClientBuilder.create().setConnectionManager(poolManager);
httpClientBuilder.setKeepAliveStrategy(new ConnectionKeepAliveStrategy() { @Override
public long getKeepAliveDuration(HttpResponse response, HttpContext context) {
HeaderElementIterator iterator = new BasicHeaderElementIterator(response.headerIterator(HTTP.CONN_KEEP_ALIVE));
while (iterator.hasNext()) {
HeaderElement headerElement = iterator.nextElement();
String param = headerElement.getName();
String value = headerElement.getValue();
if (null != value && param.equalsIgnoreCase("timeout")) {
return Long.parseLong(value) * 1000;
}
}
return 30 * 1000;
}
});
httpClientBuilder.setRetryHandler(new DefaultHttpRequestRetryHandler(retryCount, false));
return httpClientBuilder.build();
}
@Bean
public RequestConfig createRequestConfig() {
return RequestConfig.custom()
.setConnectionRequestTimeout(connectionRequestTimeout) // 从连接池中取连接的超时时间
.setConnectTimeout(connectTimeout) // 连接超时时间
.setSocketTimeout(socketTimeout) // 请求超时时间
.build();
} @Bean
public IdleConnectionEvictor createIdleConnectionEvictor(PoolingHttpClientConnectionManager poolManager) {
IdleConnectionEvictor idleConnectionEvictor = new IdleConnectionEvictor(poolManager, waitTime, idleConTime);
return idleConnectionEvictor;
} }
第三步：创建httpClient的工具类
@Component
public class HttpClientHelper { private Logger LOGGER = LoggerFactory.getLogger(HttpClientHelper.class); @Autowired
private CloseableHttpClient httpClient; @Autowired
private RequestConfig requestConfig; public String get(String url, HashMap<String, Object> paramMap, HashMap<String, Object> header) {
String result = null;
if ("".equals(url)) {
return result;
}
// 创建一个request对象
HttpGet httpGet = new HttpGet(url);
CloseableHttpResponse response = null;
try {
// 配置连接参数
httpGet.setConfig(requestConfig);
//设置参数
if (paramMap != null && paramMap.size() > 0) {
List<NameValuePair> params = new ArrayList<>();
for (Entry<String, Object> entry : paramMap.entrySet()) {
params.add(new BasicNameValuePair(entry.getKey(), URLEncoder.encode(entry.getValue().toString(), "UTF-8")));
}
String strParams = EntityUtils.toString(new UrlEncodedFormEntity(params));
// 防止多参数时，分隔符","被转义
String realParams = URLDecoder.decode(strParams, "UTF-8");
httpGet.setURI(new URI(httpGet.getURI().toString().indexOf("?") > 0 ? httpGet.getURI().toString() + "&" + realParams : httpGet.getURI().toString() + "?" + realParams));
}
// 设置头
if (header != null && header.size() > 0) {
for (Entry<String, Object> entry : header.entrySet()) {
httpGet.addHeader(entry.getKey(), entry.getValue().toString());
}
}
// 执行request请求
response = httpClient.execute(httpGet);
result = parseResponse(response); } catch (Exception e) {
LOGGER.error("url : "+ url +", msg : " + e.getMessage());
httpGet.abort();
} finally {
try {
if (response != null) {
response.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
} public String post(String url, HashMap<String, Object> paramMap, HashMap<String, Object> header) {
String result = null;
if ("".equals(url)) {
return result;
}
// 创建一个request对象
HttpPost httpPost = new HttpPost(url);
CloseableHttpResponse response = null;
try {
// 配置连接参数
httpPost.setConfig(requestConfig);
// 设置参数
if (paramMap != null && paramMap.size() > 0) {
List<NameValuePair> params = new ArrayList<>();
for (Entry<String, Object> entry : paramMap.entrySet()) {
params.add(new BasicNameValuePair(entry.getKey(), entry.getValue().toString()));
}
HttpEntity entity = new UrlEncodedFormEntity(params);
httpPost.setEntity(entity);
}
// 设置头
if (header != null && header.size() > 0) {
for (Entry<String, Object> entry : header.entrySet()) {
httpPost.addHeader(entry.getKey(), entry.getValue().toString());
}
}
// 执行request请求
response = httpClient.execute(httpPost);
result = reponseHandle(response);
} catch (Exception e) {
LOGGER.error("url : "+ url +", msg : " + e.getMessage());
httpPost.abort();
} finally {
try {
if (response != null) {
response.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
} public String postJSON(String url, String json_str, HashMap<String, Object> header) {
String result = null;
if ("".equals(url)) {
return result;
}
// 创建一个request对象
HttpPost httpPost = new HttpPost(url);
CloseableHttpResponse response = null;
try {
// 配置连接参数
httpPost.setConfig(requestConfig);
// 设置参数
if (json_str != null && !"".equals(json_str)) {
StringEntity entity = new StringEntity(json_str, ContentType.APPLICATION_JSON);
entity.setContentEncoding("UTF-8");
entity.setContentType("application/json");
httpPost.setEntity(entity);
}
// 设置头
if (header != null && header.size() > 0) {
for (Entry<String, Object> entry : header.entrySet()) {
httpPost.addHeader(entry.getKey(), entry.getValue().toString());
}
}
// 执行request请求
response = httpClient.execute(httpPost);
result = reponseHandle(response); } catch (Exception e) {
LOGGER.error("url : "+ url +", msg : " + e.getMessage()+", param : " +json_str);
httpPost.abort();
} finally {
try {
if (response != null) {
response.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
} public String uploadFile(String url, String filePath, String fileParam, Map<String, Object> params) {
File file = new File(filePath);
if (!(file.exists() && file.isFile())) {
throw new RuntimeException("file : file is null");
}
String result = null;
if ("".equals(url)) {
return result;
}
// 创建一个request对象
HttpPost httpPost = new HttpPost(url);
CloseableHttpResponse response = null;
try {
// 配置连接参数
httpPost.setConfig(requestConfig);
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
builder.addBinaryBody(fileParam, file, ContentType.DEFAULT_BINARY, file.getName());
if (params != null && params.size() > 0) {
for (Entry<String, Object> entry : params.entrySet()) {
builder.addTextBody(entry.getKey(), entry.getValue().toString(), ContentType.create("text/plain", Consts.UTF_8));
}
}
HttpEntity requestEntity = builder.build();
httpPost.setEntity(requestEntity);
// 执行request请求
response = httpClient.execute(httpPost);
result = reponseHandle(response); } catch (Exception e) {
httpPost.abort();
} finally {
try {
if (response != null) {
response.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
} /**
* 解析 response数据
* @description
* @param response
* @return
* @author tangjingjing
* @date 2018年10月12日
*/
private String parseResponse(CloseableHttpResponse response) {
String result = "";
// 获取响应体
HttpEntity httpEntity = null;
InputStream inputStream = null;
try {
// 获取响应状态
int statusCode = response.getStatusLine().getStatusCode();
// 没有正常响应
if (statusCode < HttpStatus.SC_OK || statusCode >= HttpStatus.SC_MULTIPLE_CHOICES) {
throw new RuntimeException("statusCode : " + statusCode);
}
// 获取响应体
httpEntity = response.getEntity();
if (httpEntity != null) {
inputStream = httpEntity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream,"UTF-8"));
StringBuffer sb = new StringBuffer();
String line = "";
while((line=reader.readLine())!=null){
sb.append(line);
}
reader.close();
result = sb.toString();
} } catch (Exception e) {
LOGGER.error("HttpClientHelper parseResponse error", e);
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
// 如果httpEntity没有被完全消耗，那么连接无法安全重复使用，将被关闭并丢弃
try {
EntityUtils.consume(httpEntity);
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
} private String reponseHandle(CloseableHttpResponse response) {
String result = "";
// 获取响应体
HttpEntity httpEntity = null;
try {
// 获取响应状态
int statusCode = response.getStatusLine().getStatusCode();
// 没有正常响应
if (statusCode < HttpStatus.SC_OK || statusCode >= HttpStatus.SC_MULTIPLE_CHOICES) {
throw new RuntimeException("statusCode : " + statusCode);
}
// 获取响应体
httpEntity = response.getEntity();
if (httpEntity !=null) {
result = EntityUtils.toString(httpEntity);
} } catch (Exception e) {
LOGGER.error("HttpClientHelper reponseHandle error", e);
} finally {
// 如果httpEntity没有被完全消耗，那么连接无法安全重复使用，将被关闭并丢弃
try {
EntityUtils.consume(httpEntity);
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
} }
第四步：创建HttpClient无效连接清除类
/**
* 定期清理无效的http连接
* @author viruser
*
*/
package com.123.lenovo.adapter.se.common; import java.util.concurrent.TimeUnit; import javax.annotation.PreDestroy; import org.apache.http.conn.HttpClientConnectionManager; /**
* 定期清理无效的http连接
* @author viruser
*
*/
public class IdleConnectionEvictor extends Thread { private final HttpClientConnectionManager manager; private Integer waitTime; private Integer idleConTime; private volatile boolean shutdown = true; public IdleConnectionEvictor(HttpClientConnectionManager manager, Integer waitTime, Integer idleConTime) {
this.manager = manager;
this.waitTime = waitTime;
this.idleConTime = idleConTime;
this.start();
} @Override
public void run() {
try {
if (shutdown) {
synchronized (this) {
wait(waitTime);
manager.closeIdleConnections(idleConTime, TimeUnit.SECONDS);
// 关闭失效的连接
manager.closeExpiredConnections();
}
}
} catch (Exception e) { }
} @PreDestroy
public void shutdown() {
shutdown = false;
synchronized (this) {
notifyAll();
}
} }
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